CN1076079C - Cylinder decision control device for internal-combustion engine - Google Patents

Abstract

To judge a cylinder correctly by providing with a comparing means of the input times of added Low and High wave form signals, a comparing means of just before and newest input times of the High wave form signal, and a comparing means of the input times of just before and newest input times of the Low wave form signal, and judging the cylinder on the basis of each of compared result. A rotation angle sensor 12 is arranged to output a wave form signal which consists of a H(High) signal and a L(Low) signal on the basis of rotation of an internal combustion engine 1, and the input time of each wave form of the L and H signals is calculated by a calculating means 51. The input times of the calculated just before and the newest H and L signals is added by each adding means 52, 53, and also the input times of the just before and newest H and L signals are compared with each other by each comparing means 54, 55, and the added L and H signal times are compared with each other by a comparing means 57. Comparing value from each comparing means 54, 55, 57 and a judging constant setting value from a setting means 58 are compared with each other by a cylinder judging means 59, it is recognized which is a pattern in two couple of L and H signal wave forms, and cylinder judgment is carried out.

Description

The cylinder decision control device of internal-combustion engine

The present invention relates to the cylinder decision maker of the internal-combustion engine of vehicle etc., relate in particular to the cylinder of internal combustion engine of judging according to the signal countercylinder of rotation angle sensor (CMPS Camshaft Position Sensor) in the internal-combustion engine rotary part and judge control gear.

In recent years, for vehicle, especially motor vehicle internal combustion engine, in order to adapt to the mandatory provision of exhaust aspect, seek simultaneously high output on the other hand, people have adopted electric control device, to carrying out fuel injection amount, fuel injection time and firing time etc. precision control, constantly adapt to mandatory provision and high outputization to described exhaust.

To described fuel injection time and when controlling firing time, usually must detect crankangle (crankangle), to judge the cylinder of answering burner oil and igniting simultaneously, thus angular sensor is set, so that know the angle of swing of bent axle (crank shaft).

Above-mentioned angular sensor is made usually at camshaft places such as (cam shaft) crank angle sensor and cylinder discriminating sensor is set respectively, and this camshaft is with 1/2 speed rotation synchronous with it of speed of crankshaft.

As mentioned above, use the method for different sensor crankangles and judgement cylinder, increased number of sensors and cost of production, simultaneously,, complicated on the structure according to the control system that the detection of a plurality of sensors is worked.

As the means that address the above problem, people have proposed a kind of like this method, promptly adopt a rotation angle sensor, according to the output signal detection crankangle and the judgement cylinder of this rotation angle sensor.There is the spy to open that flat 1-219341 communique, spy are opened flat 5-086953 communique, the spy opens flat 7-58028 communique as the announcement document of this method, and the flat 7-8811 communique of special bulletin etc.

The technology of above-mentioned announcement, be provided with from crank angle sensor corresponding to a plurality of reference pulse signals of a plurality of cylinders in after reference pulse signal finishes, export cylinder immediately and judge the means of using pulse signal, or will be from the length corresponding to the reference pulse signal of specific cylinder of crank angle sensor, set for different with length corresponding to the reference pulse signal of other cylinder from crank angle sensor.Then, whenever input during from the pulse signal of sensor, the cycle time of instrumentation pulse signal, obtain the last time ratio in pulse spacing and this pulse spacing (cycle time) instrumentation value, and compare with predetermined value, be that reference pulse signal or cylinder are judged and used pulse signal to judge this pulse signal.

But, in the prior art of above-mentioned announcement, though any specific cylinder as first cylinder, can both differentiate, but other cylinder needs could judge after described first cylinder has been determined.Therefore and before first cylinder is determined, can not carry out the judgement of cylinder.Also promptly, under first cylinder was failed the judgement situation, bent axle was further rotated, and during 2 rotations till the next first cylinder reference pulse comes out, can not carry out the judgement of cylinder, can not begin the control of fuel injection control and firing time.Moreover, when cold-starting, bent axle rotates (forcing to make crankshaft rotating by starting motor) can cause the rotation change, and be not continuously but interrupted generation outburst, cause the rotation significant change, changed, so when bent axle rotates, till the spin stabilization, can not judge by countercylinder in the pulse spacing (cycle time).

Must judge cylinder during engine starting, the result of this cylinder decision delay can make the engine starting characteristic degenerate.

The object of the present invention is to provide and a kind ofly only use a rotation angle sensor of being located at internal-combustion engine just can carry out the reliable cylinder of internal combustion engine of judging fast to judge control gear all cylinders.

Another object of the present invention is to provide a kind of cylinder decision control device that improves the internal-combustion engine of engine starting performance.

The application's inventor is conceived to constitute rotation angle sensor by following mode, promptly whenever each steam-cylinder piston of internal-combustion engine arrive regulation crank angular position (as, the preceding predetermined angular position of corresponding steam-cylinder piston arrival upper dead center (top dead center)) just produces the cylinder pulse signal, when arriving specific degree in crank angle position, above-mentioned I. C. engine crankshaft just produces the benchmark pulse signal simultaneously, and in these cases, from continuous 2 pulse signals of angle of rotation with regard to its high level and the relation between the low level endurance, can divide paired a plurality of patterns, and these a plurality of signal modes correspond respectively to the cylinder that piston is in regulation degree in crank angle position corresponding to the cylinder of internal combustion engine number.Therefore, the application's inventor just can differentiate the cylinder that is in regulation degree in crank angle position by differentiating the signal mode from continuous 2 pulse signals of rotation angle sensor.

So according to one aspect of the present invention, vehicle has with the cylinder decision control device of internal-combustion engine:

Rotate the rotation angle sensor of pulse (pulse) signal that output low level (low level) and high level (high level) successively constitute with internal-combustion engine;

Whenever low duration and the high level lasting time of the described pulse signal of importing described rotation angle sensor with regard to this pulse signal of instrumentation, and the time instrumentation portion that is exported successively;

The high level addition portion that exports after will up-to-date high level lasting time and the high level lasting time addition that is right after before it from described time instrumentation portion;

The low level addition portion that exports after will up-to-date low duration and the low duration addition that is right after before it from described time instrumentation portion;

Will from the high level lasting time of above-mentioned high level addition portion addition with compare from the above-mentioned low level addition portion low duration of addition, and likening to of they is first comparing section of first specific output;

Will from above-mentioned time instrumentation portion up-to-date high level lasting time be right after it before high level lasting time compare, and likening to of they is second comparing section of second specific output;

Will from above-mentioned time instrumentation portion up-to-date low duration be right after it before low duration compare, and likening to of they is the 3rd comparing section of the 3rd specific output;

Differentiate the cylinder judegment part that piston (piston) is in the cylinder of regulation crank (crank) angular orientation according to above-mentioned first, second, third ratio that above-mentioned first, second and third comparing section is come.

As above the present invention of Gou Chenging only uses a rotation angle sensor, continuous 2 the up-to-date pulse signals that utilize this rotation angle sensor, and promptly up-to-date 2 groups of high level waveforms and low level waveform just can reliably be judged all cylinders rapidly.

According to one embodiment of the invention, when the piston of above-mentioned each cylinder of internal-combustion engine is in regulation degree in crank angle position, described rotation angle sensor just produces the cylinder pulse signal, just produces the benchmark pulse signal simultaneously when above-mentioned I. C. engine crankshaft arrives specific crank angles degree position.

According to one embodiment of the invention, the degree in crank angle position of so-called afore mentioned rules is exactly the predetermined angular position that corresponding steam-cylinder piston arrives before top dead center.

According to one embodiment of the invention, described cylinder decision control device can further have: behind the described internal-combustion engine of starting motor (starter motor) starting, respond the low level and the high level of first pulse signal of described rotation angle sensor output, to all cylinders jet controling part burner oil time the simultaneously; When the said cylinder judegment part is differentiated, to differentiating the IGNITION CONTROL portion that this cylinder sends the igniting indication; This is differentiated the next afterwards cylinder that should light a fire of cylinder sent the jet controling part that fuel sprays indication.

According to said structure, during starting, because the response cylinder is judged preceding initial pulse signal, i.e. one group of high level waveform and low level waveform, and to all cylinder injection fuel, so by to it after cylinder judges that the cylinder firings judged can break out immediately, has improved starting characteristic.

According to one embodiment of the invention, said cylinder judges that control gear further has: the means of the order of the cylinder that regulation should be differentiated by the said cylinder judegment part; Whether the cylinder that judgement is differentiated through the said cylinder judegment part is consistent with the cylinder of afore mentioned rules, when being judged to be unanimity, judges that this cylinder of having judged is correct means.

According to one embodiment of the invention, said cylinder judges that control gear further comprises: when the cylinder of judging when the said cylinder judegment part and the cylinder of afore mentioned rules are inconsistent, count the means of this number of times; When reaching stipulated number, this number of times produces the means of alarm.

According to said structure, judge correct and when judging that control is unusual at cylinder, can prevent that mis-ignition, mistake from spraying control.

The accompanying drawing simple declaration

Fig. 1 is the overall structure figure of automotive engine system that contains the cylinder decision control device of one embodiment of the invention internal-combustion engine;

Fig. 2 is the skeleton diagram of control unit structure in presentation graphs 1 automotive engine system;

Fig. 3 is the functional block diagram that Fig. 2 control unit inner casing is judged;

When Fig. 4 applies the present invention to 3 cylinder internal combustion engines for expression, the signal output waveform figure of rotation angle sensor in Fig. 1 automotive engine system;

Fig. 5 is the endurance figure of rotation angle sensor signal output waveform among Fig. 4;

Fig. 6 is the illustration figure of the signal output waveform of rotation angle sensor shown in Figure 5;

Fig. 7 represents to be used in the rotation angle sensor signal output waveform shown in Figure 6 the oscillogram of the signal mode 1 that cylinder judges.

Fig. 8 represents to be used in the rotation angle sensor signal output waveform shown in Figure 6 the oscillogram of the signal mode 2 that cylinder judges.

Fig. 9 represents to be used in the rotation angle sensor signal output waveform shown in Figure 6 the oscillogram of the signal mode 3 that cylinder judges.

Figure 10 represents to be used in the rotation angle sensor signal output waveform shown in Figure 6 the oscillogram of the signal mode 4 that cylinder judges.

Figure 11 is used to judge the decision condition of cylinder and the figure of result of determination in presentation graphs 1 automotive engine system;

Figure 12 is the schematic representation of internal-combustion engine rotation upset condition;

Figure 13 be to Fig. 7 to each signal mode shown in Figure 10, the endurance of expression rotation angle sensor output signal than and cylinder judge the figure of the relation between the constant setting value;

Figure 14 is to the schematic representation of elapsed time of internal-combustion engine burner oil and IGNITION CONTROL in one embodiment of the invention;

Figure 15, Figure 16 are that cylinder is judged in one embodiment of the invention, fuel sprays and the flow chart of IGNITION CONTROL;

Figure 17, Figure 18, Figure 19 are the flow chart that the expression cylinder is judged the concrete example of control in one embodiment of the invention;

Figure 20, Figure 21 are the flow chart that the expression cylinder is judged the concrete example of control in another embodiment of the present invention;

Figure 22 when applying the present invention to 4 cylinder internal combustion engines, the schematic representation of the signal output waveform of rotation angle sensor in Fig. 1 automotive engine system.

Below, be described with reference to the accompanying drawings the embodiment that cylinder of internal combustion engine of the present invention is judged control gear.

Here, so-called cylinder judges to be exactly to judge the cylinder of answering burner oil and igniting among the present invention, gets and judges that corresponding piston is in the cylinder of the regulation crank angle of before top dead center.

Fig. 1 is the overall structure figure of automotive engine system that contains the cylinder decision maker of present embodiment internal-combustion engine, and among Fig. 1, internal-combustion engine 1 each cylinder has piston 1a; Cylinder body (cylinder) 1b, and the firing chamber 1c of described piston 1a and described cylinder body 1b formation, 1c top, this firing chamber is connected to suction tude 16 and outlet pipe 17.

, it is distributed through the throttling bodies 4 of gas-entered passageway 16a from the air of air-strainer 2 input, suck in cylinder (cylinder) 1b of internal-combustion engine 1 by suction tude 16 by having throttle valve 4a.

On the other hand, from petrolift (not shown) suction of the fuel of fuel tank (not shown), and pressurization, spray into suction tude 16 from sparger 5, suck in company with above-mentioned air in the cylinder 1b of internal-combustion engine 1.

Pressure transducer (the absolute pressure transducer: absolute pressure sensor) 3 that detects suction press is installed on the above-mentioned throttling bodies 4, intake air temperature sensor 7 (intake airtemperature sensor) is installed on above-mentioned suction tude 16 simultaneously, detects the temperature that enters air.

The cooling-water temperature sensor (engine coolant temperature transducer) 9 that detects cooling water temperature is installed on the cylinder body 1b of internal-combustion engine 1 main body, oxygen sensor 10 is installed on outlet pipe 17 simultaneously.

The automotive engine system of present embodiment has control unit 11, and the output arrangement of above-mentioned each sensor becomes to be input to this control unit 11.

Internal-combustion engine 1 main body top is equipped with spark plug 6, and this spark plug 6 provides the high voltage that is produced by spark coil 8 according to the output signal of control unit 11.

Be provided with photocell 13 and dish (rotating disk: rotorplate) 14 in the rotation angle sensor 12 of detection internal-combustion engine 1 angle of rotation, this dish 14 usually with open and close camshafts that air inlet and exhaust valve uses and directly link to each other, and rotate with 1/2 speed of bent axle (the omitting diagram) rotational speed of internal-combustion engine 1.

Above-mentioned dish 14 main bodys dispose to such an extent that can block light-emitting component at a pair of photocell 13 (light emitting diode: unit and photo detector (photodiode: ptoto diode) between the unit, and coil 14 main bodys and be provided with otch 15 (the signal groove: signal slit) that a plurality of cylinder signals are used light emitting diode).

In case coil 14 rotations when making the cylinder signal, come the light of self-emission device to arrive photo detector, thereby this photo detector generation pulse signal send control unit 11 to the position consistency of the open part of otch 15 and photocell 13.Therefore, by coiling 14 rotation, the corresponding pulse signal of angle of swing of output and I. C. engine crankshaft is promptly represented the signal of the specific crank angles degree position of each cylinder to form the reference signal that detects discharge time, the reference signal of firing time.Then, with these signal Input Control Elements 11.

Control unit 11, as shown in Figure 2, by comprising CPU (central processing unit (CPU): central prosessing unit), ROM (ROM (read-only memory): read only memory), (analog to digital: analog-to-digital) transducer and the arithmetic unit that comprises input circlult constitute A/D, and according to above-mentioned each sensor 3,7, the calculation process that the input signal of 10 and 11 input signal and rotation angle sensor 12 is scheduled to, its operation result output makes described sparger 5 actions, the fuel quantity of necessity is sprayed into each suction tude 16, make spark plug 6 produce ignition spark according to the crankshaft rotating angle in suitable firing time simultaneously.

In the present embodiment be internal-combustion engine with 4 circulations, 3 cylinders as objective for implementation, therefore in Fig. 2, sparger 5,5 ', 5 " expression first to the 3rd totally 3 spargers.As described below, if internal-combustion engine 1 is 4 cylinders, then sparger is 4, also is fine below 4 certainly, have again spark coil 8,8 ', 8 " number also be so, so the present invention is not limited to 3 cylinders.

Below, the cylinder decision method of present embodiment internal-combustion engine is described.

Fig. 3 represents to judge with cylinder in control unit 11 structures controlling party block diagram of relevant funtion part, and the internal-combustion engine after this control unit 11 is judged and judged the cylinder of internal-combustion engine according to the output signal of rotation angle sensor 12 is controlled.

Above-mentioned rotation angle sensor 12 is according to the rotation output waveform signals of internal-combustion engine 1, also promptly exports (H) (L) pulse signal that constitutes of signal of signal and low level Low (low) by the High (height) of high level.When the signal input is arranged, low level, high level endurance separately in the Low that Low, High signal time instrumentation portion 51 export with regard to the described turn-sensitive device 12 of instrumentation, the High signal.Preferably there is such function in this instrumentation portion 51, can remove this noise as importing different inputs with normal signal when the external noise input is promptly arranged, and like this, can prevent mistake injection and mis-ignition that noise causes.

High signal time addition portion 52, with described instrumentation portion 51 instrumentations to up-to-date and be right after the endurance addition of the High signal before it, whenever addition is just finished and successively original additive value is updated to new additive value.Low signal time addition portion 53 with described instrumentation portion 51 instrumentations to up-to-date and be right after the endurance addition of the Low signal before it, whenever addition is just finished and successively original additive value is updated to new additive value.

The comparing section 54 of High signal time, to described instrumentation portion 51 instrumentations to endurance up-to-date and that be right after the High signal before it compare, export this result, in regular turn original comparison result value is updated to new comparison result value whenever just relatively finishing.

The comparing section 55 of Low signal time, to described instrumentation portion 51 instrumentations to endurance up-to-date and that be right after the Low signal before it compare, export this result, in regular turn original comparison result value is updated to new comparison result value whenever just relatively finishing.

Low, High signal waveform detection portion 56, the trailing edge of the pulse signal of rotation angle sensor 12 just detects Low, one group of Low of High signal time instrumentation portion 51 outputs, the input of High signal whenever, and testing signal is defeated by number of cylinders addition portion 60.Have again, when engine starting, be after not shown ignition key switch (ignition key switch) is connected (ON), in a single day this detection unit 56 detects first group of Low, the High signal of rotation angle sensor 12, just testing signal is exported to jet controling part (while many mouthfuls of fuel injection control unit: simultaneous multiport fuel injection control unit) 62 simultaneously.So, simultaneously jet controling part 62 with signal export to each sparger 5,5 of internal-combustion engine ', 5 ", these spargers are burner oils simultaneously.

Addition Low, High signal time comparing section 57 compare addition Low, High signal time after Low, 52,53 additions of High signal time addition portion, and this comparison result value are exported to cylinder judegment part 59.The rising edge of the trailing edge of High signal or Low signal is just carried out this comparison operation whenever.

Cylinder judegment part 59 with the comparison value (operation values) of described addition Low, High signal time comparing section 57, according to the up-to-date of High signal comparing section 54 and the comparison value of the input time of the High signal before being right after it and Low signal comparing section 55 up-to-date and be right after it before the Low signal input time the value that comparison value obtained and judge that constant configuration part 58 is set, the judgement constant setting value three of output compares.By this comparative result, discern two groups of Low, High signal waveform and belong to any in 4 kinds of signal modes, and judge according to this identification countercylinder.

Though it is not shown, but judge that 58 inputs of constant configuration part have each temperature data of intake air temperature sensor 7, cooling-water temperature sensor 9 and the crankshaft rotating number of internal-combustion engine 1, and select, set corresponding to internal-combustion engine 1 running state and make the judgement constant that cylinder is judged usefulness according to these input values.

Like this, during internal-combustion engine 1 starting, according to initial two groups of Low of described rotation angle sensor 12, the output of High signal, make described 51～55,57 each work, and then cylinder judegment part 59 countercylinders judge that the signal of this result of determination is exported to cylinder and sprayed (many mouthfuls of fuel injections according to the order of sequence: control device 63 sequentialmultiport fuel injection) according to the order of sequence.Thus, sparger 5,5 ', 5 " by described cylinder jet controling part 63 according to the order of sequence, respectively to be suitable for most the cylinder injection fuel that fuel sprays according to result of determination.

Cylinder judegment part 59 is to the signal of the above-mentioned result of determination of IGNITION CONTROL portion 64 outputs, and spark plug 6 is lighted a fire for the best cylinder of igniting to result of determination respectively by this IGNITION CONTROL portion 64.

Have, cylinder judegment part 59 offers number of cylinders addition portion 60 and cylinder order comparing section 61 with the signal of result of determination again.Number of cylinders addition portion 60 when receiving Low, High signal waveform detection portion 56 is detected and exporting the testing signal of one group of Low, High signal, only extracts the signal mode number of the result of determination signal of an expression cylinder judegment part 59.Then, the signal mode that extracted number is offered cylinder order comparing section 61.

Cylinder order comparing section 61 receives the signal from the cylinder that expression is judged of described cylinder judegment part No. 59, and with the pattern count signal of described number of cylinders addition portion 60 relatively, whether the determinating mode number is consistent, judges whether the signal corresponding to the cylinder that sorts is detected (first cylinder, second cylinder, the 3rd cylinder are differentiated the order of using signal with signal and benchmark) in regular turn.If other signal modes beyond these signals that input produces by this order then are judged to be the mistake input of signal and the misoperation of control, and will represent that the signal of this result of determination exports to the unusual several memory sections 65 of judgement.

Cylinder order comparing section 61, in case be judged to be input of described signal mistake or control misoperation, promptly misinterpretation is then indicated cylinder jet controling part 63 and 64 interrupts fuel injection control of IGNITION CONTROL portion and IGNITION CONTROL according to the order of sequence.Judge the described misinterpretation number of times of unusual several memory section 65 storages, limit number of times if this number of times surpasses, then to alarm device, for example (multifunction display: 66 output signals mulfunction indicator) produce alarm to alarm display.

Fig. 4 represents the output signal of rotation angle sensor 12.

Rotation angle sensor 12 produces the pulse signal R (in Fig. 4 illustrative examples being) corresponding to the pulse signal P1～P3 of internal-combustion engine 1 cylinder 1b number and benchmark differentiation usefulness.

Also promptly, on the dish 14 of the interior rotation angle sensor 12 of being located at Fig. 1 explanation, be provided with corresponding to the cylinder signal of number of cylinders number with otch 15 be used for a signal otch 15a of benchmark differentiation usefulness.

Therefore, when these signals with otch 15,15a between the light-emitting device unit of photocell 13 and the photo detector unit by the time, above-mentioned each signal of rotation angle sensor 12 generations.When signal arrives between above-mentioned light-emitting device unit and the photo detector unit with the opening portion of otch 15,15a, the pulse signal waveform of this rotation angle sensor 12 rises, become the High signal, when signal finishes to pass through with otch 15,15a, the pulse signal waveform of rotation angle sensor 12 descends, and becomes the Low signal.

Also promptly, the width of the pulse signal waveform of described rotation angle sensor 12 (endurance) is proportional with the length of breach 15 with the signal of dish 14.

Corresponding to the pulse signal waveform of first to the 3rd each cylinder shape, all be identical shaped, and the upper dead center that the trailing edge of each pulse signal waveform is set for than compression process (compression process) shift to an earlier date several angle (AG with otch ₂), making in the corresponding cylinder, piston is in the position of the crankangle of regulation.

Also promptly, angle A G shown in Figure 4 ₁Be to produce based on the signal of rotation angle sensor 12 mid-games 14 angle, the crankshaft rotating angle is set in the scope of before top dead center 65 degree to 25 degree with the signal of otch 15.Equally, angle A G ₂The crankshaft rotating angle is set in the scope of upper dead center 5 degree to 15 degree.These pulse waveform signals are all used the signal that generates fueling jet controling part 62,63 and IGNITION CONTROL portion 64.

Among Fig. 4, export successively from first cylinder with signal waveform to second, third cylinder signal waveform.Yet, this situation be according to the order of 3 cylinder internal combustion engines commonly used, 1 outburst record and narrate for first, second ....If the outburst of the cylinder of internal combustion engine of using order is different, self-evident, the title of the signal waveform of rotation angle sensor output also can become thereupon.

Except that the signal waveform corresponding to each cylinder upper dead center, the dish 14 of rotation angle sensor 12 is provided with signal otch 15a, so that before using waveform as first cylinder, promptly the 3rd cylinder is used between the waveform with the waveform and first cylinder, output reference differentiation signal.

Fig. 5 represents the state that changes with internal-combustion engine 1 crankshaft rotating from the waveform input signal of rotation angle sensor.Calculate High part and Low time partly in this input signal by signal time instrumentation portion 51.If the instrumentation value of the endurance of one group of High of up-to-date input pulse signal, Low signal is TH _NewAnd TL _New, the instrumentation value of establishing the endurance that is right after one group of preceding High of this pulse signal, Low signal is TH _OldAnd TL _OldThese instrumentation values, the trailing edge of input pulse signal waveform just upgrades successively whenever.

Fig. 6 is an example of rotation angle sensor signal output waveform in the present embodiment, also promptly represent corresponding among signal each pulse signal R, P1～P3 the example of the endurance (CA represents with crankangle) of High signal waveform, Low signal waveform with otch 15a, 15 angles.Below, explanatory drawing 6 signal output waveforms.

So as mentioned above, owing to use two groups of High, Low input signal, observe be conceived to each signal waveform, there are 4 kinds of signal modes shown in Figure 10 extremely from Fig. 6 and Fig. 7 in the signal among visible Fig. 4 and Fig. 6.

The signal mode 1 that is called shown in Figure 7, the signal mode 2 that is called shown in Figure 8, the signal mode 3 that is called shown in Figure 9, the signal mode 4 that is called shown in Figure 10 describes below.

Among Fig. 7 to Figure 10, TH _New, TL _NewThe endurance of representing in the up-to-date pulse signal one group of High, Low signal waveform respectively, TH _Old, TL _OldExpression is right after in the pulse signal before the up-to-date pulse signal endurance of one group of High, Low signal waveform respectively.

Below, with reference to Figure 11 the cylinder judgement is described.The instrumentation value TH of High part calculates in signal time addition portion 52,53 according to formula (1) and formula (2) _OldAnd TH _NewInstrumentation value TL with the Low part _OldAnd TL _New

∑ TH=TH _Old+ TH _NewFormula (1)

∑ TL=TL _Old+ TL _NewFormula (1)

Among Fig. 7, the aggregate value of above-mentioned two groups of operation times shown in formula (1), (2) (=∑ TH+ ∑ TL) is the value of the 240CA (240 ° at crankshaft rotating angle) corresponding to 3 cylinder internal combustion engines.In the drawing of Fig. 6 to Figure 10, for convenience of explanation, transverse axis is recorded and narrated as time shaft and angle axle.

Cylinder judegment part 59, the comparative result (TH of the High signal duration by (a) High signal time comparing section 54 is produced up-to-date and before being right after it _Old/ TH _New), (b) produce up-to-date of signal time comparing section 55 and be right after it before the comparative result (TL of Low signal duration _Old/ TL _New), (c) addition High, Low signal time comparing section 57 produce from the addition Low signal duration (∑ TL) of addition portion 52,53 and the comparative result (∑ TL/ ∑ TH) of addition High signal duration (∑ TH), respectively with the corresponding judgement constant C CH1 that judges that constant configuration part 58 sets, CCL1, CCL2, CLOW compares, and judges thereby carry out cylinder.

Also promptly, cylinder judegment part 59, the trailing edge of High signal just judges whether each decision condition is set up shown in following formula (3)～(6), and countercylinder is judged thus whenever.

(∑ TL/ ∑ TH)＜CLOW formula (3)

In the formula, CLOW is a constant

(TH _Old/ TH _New)≤CCH1 formula (4)

In the formula, CCH1 is a constant

(TL _Old/ TL _New)≤CCL1 formula (5)

In the formula, CCL1 is a constant

(TL _Old/ TL _New)≤CCL2 formula (6)

In the formula, CCL2 is a constant

Also be, as shown in figure 11, formula (3) and formula (4) are when setting up simultaneously, in the future one group of Low of the pulse signal before one group of High, Low signal and this up-to-date pulse signal of the up-to-date pulse signal of spinning angle transducer, High signal (that is, up-to-date two groups of High, Low signal) are judged to be the signal mode 1 among Fig. 7.That is, the pulse signal waveform during this judgement is equivalent to the trailing edge part of first cylinder of signal mode 1 with pulse signal waveform P1, and crankangle is the angle A G2 of the first cylinder before top dead center in this moment first cylinder.Therefore, at this constantly, being judged to be the cylinder that should light a fire is first cylinder.

Formula (4) is false, and when same up-to-date style (5) was set up, up-to-date two groups of High, the Low signal determining of the angle transducer of spinning in the future were signal mode 2 among Fig. 8.That is, the pulse signal waveform during this judgement is equivalent to the trailing edge part of second cylinder usefulness pulse signal waveform P2 in the signal mode 2, and crankangle is the angle A G2 of the second cylinder before top dead center in this moment second cylinder.Therefore, this to be judged to be the cylinder that should light a fire constantly be second cylinder.

Formula (3) is false, and when same up-to-date style (6) was set up, up-to-date two groups of High, the Low signal determining of the angle transducer of spinning in the future were signal mode 3 among Fig. 9.That is, the pulse signal waveform during this judgement is equivalent to the trailing edge part of the 3rd cylinder usefulness pulse signal waveform P3 in the signal mode 3, and crankangle is the angle A G3 of the 3rd cylinder before top dead center in this moment the 3rd cylinder.Therefore, this to be judged to be the cylinder that should light a fire constantly be the 3rd cylinder.

Formula (6) is when being false, and is the signal mode 4 of Figure 10 from up-to-date two groups of Low, the High signal determining of rotation angle sensor.That is, the pulse signal waveform during this judgement is that benchmark is differentiated the trailing edge part with signal R.

Therefore, signal by each cylinder signal on the dish 14 shown in Figure 1 being differentiated usefulness with otch 15 and benchmark is an appropriate value with the length setting of otch 15a, and the constant C LOW that will be used to judge, CCH1, CCL1 and CCL2 set adequate value for, just can judge all each cylinders that should light a fire number according to the waveform input signal that rotation angle sensor comes.

Attempt actual constant setting value shown in routine formula (1)～(6), it is constructed as follows.Promptly, signal is proportional with the length of otch 15 and 15a in the length of the pulse signal waveform that rotation angle sensor comes and the dish 14, so constitute among each pulse signal P1～P3 the signal section length of High get corresponding to crankshaft rotating angle 70 degree (below be called 70CA, CA is the abbreviation of Crank Angle) value, benchmark is differentiated High with signal R and is partly got value corresponding to 40CA, and this benchmark differentiation is set value corresponding to 35CA with signal R and front the 3rd cylinder for the Low signal section between pulse signal P3.

Therefore, corresponding to 170CA, the benchmark differentiation is equivalent to 95CA with the signal and first cylinder with the Low signal section between pulse signal to each cylinder with Low signal section between pulse signal.According to above-mentioned condition, can set constant C LOW, CCH1, CCL1, and the value of CCL2 as follows.

When internal-combustion engine 1 was in constant rotation status, each cylinder of input was proportional with each signal usefulness incision length with the endurance of pulse signal waveform, so each setting value can be set as follows.

CLOW＝1.806

CCH1＝0.786

CCL1＝0.780

CCL2＝2.929

But, under internal-combustion engine 1 actual motion state, rotation change as shown in figure 12 can take place usually.For example, establishing change lower limit rotation number is REV1, and upper limit rotation number is REV2, when each steam-cylinder piston 1a arrives upper dead center from compression process, rotates slack-offly, and rotation number becomes REV1.By upper dead center,, revolve transition block then in case arrive the outburst process, rotation number is REV2, if next cylinder enters compression process, rotates slack-off once more, so constantly rotate variation, so the endurance of the length of each signal usefulness otch and waveform input signal is disproportionate.

Figure 13 is for to be under the abundant warm-up mode at internal-combustion engine 1, with regard to TH _Old/ TH _New, TL _Old/ TL _NewAnd ∑ TL/ ∑ TH3 item is represented the input waveform time ratio of trying to achieve.This moment, setting value was used in the cylinder judgement, can be set as follows.

CLOW＝1.563

CCH1＝0.813

CCL1＝0.781

CCL2＝2.030

Like this, set appropriate value for by cylinder being judged constant, clearly visible from Figure 13, satisfy TH _Old/ TH _NewThe signal mode decidable of≤CCH1 is a signal mode 1.But in the present embodiment, satisfy TH _Old/ TH _NewThe signal mode of≤CCH1 and ∑ TL/ ∑ TH＜CLOW is set for and is judged to be signal mode 1.Equally, as the explanation that reference Figure 11 is done, by judging that whether satisfying above-mentioned formula (3)～(6) also can decision making to each signal mode 2～4.

Yet in (as-20 ℃ or lower) when starting under cryogenic conditions, bent axle starting (forcing to make crankshaft rotating by starting motor) has just begun the back outburst and can intermittently carry out, and the rotation change is very big before outburst takes place continuously.Therefore, the time ratio of input waveform also changes, and cylinder judges that with the also necessary setting of setting value and above-mentioned two kinds of values that situation is different, for example, judgement constant C CH1, CCL1 and CCL2 must set for than above-mentioned two kinds of values that situation is little.

Present embodiment as mentioned above, cylinder just calculates two groups of Low, the High aggregate value of signal duration with the trailing edge of pulse signal waveform whenever, and according to both time ratios, TH _Old/ TH _NewAnd TL _Old/ TL _NewEach time ratio, countercylinder is judged.Here, judge the running state setting judgement constant of constant configuration part 58 according to internal-combustion engine 1.Promptly, need (1) internal-combustion engine 1 to be in the cold machine state of starting state according to whether, (2) starting is through behind the certain hour, the internal-combustion engine each several part all reaches lubricated state, (3) or be in warm-up mode, (4) further high speed rotating and can ignore the state of rotation change, running state such as (5) oil-engine driven load side moment of inertia is big changes according to internal-combustion engine rotation upset condition and to judge constant.

In above-mentioned running state, running state (1) is as being judged by the cooling water temperature (that is the output of cooling-water temperature sensor 9) and the internal-combustion engine rotation number (that is the output of rotation angle sensor 12) of internal-combustion engine.Running state (2) is as being judged by elapsed time behind coolant water temperature and the engine starting.Running state (3) is as being judged by elapsed time behind coolant water temperature and the engine starting.Running state (4) is as being judged by the rotation number of elapsed time and internal-combustion engine behind coolant water temperature, the engine starting.Running state (5) is as how many judgements by running velocity (that is the output of not shown vehicle speed sensor) and fuel injection amount.

Except that above-mentioned every, during running state is judged also the intake temperature of available internal-combustion engine etc. judge.

As mentioned above, the running state that is taken as according to internal-combustion engine 1 changes the judgement constant that cylinder is judged usefulness.When in the running state that limits, carrying out the cylinder judgement, self-evident, can judge that also constant be set at constant fixed value.

As change one of method of judging constant corresponding to the running state of internal-combustion engine,, and change the method for judging constant according to the output of this sensor as a useful sensor running state.At this moment, Fig. 3 judges and is provided with numerical tables 70 in the constant configuration part 58 that this table 70 is read the judgement constant according to the checkout value of the signal representative of sensor (for example, the cooling-water temperature sensor 9) output that detects running state.Table 70 also can make the monobasic table and read the proportional judgement constant of exporting with sensor of checkout value.Table 70 also can make every variation one specified value of checkout value of sensor, judges that constant also changes a specified value.

In addition, adopt a plurality of sensor running statees in addition, and change the method for judging constant according to the output of these a plurality of sensors.At this moment, Fig. 3 judges and is provided with conversion figure in the constant configuration part 58 in order to replacing above-mentioned numerical tables that this figure reads the judgement constant according to the checkout value of the signal representative of a plurality of sensors outputs that detect running state.This figure also can make every variation one specified value of checkout value of each sensor output and judge that constant also changes a specified value.

Self-evident, if signal changes with otch 15 and 15a length on the circumferencial direction of dish, then the High of the pulse signal that comes of rotation angle sensor, the endurance of Low signal also change, thus corresponding with it, the setting value of necessary change judgement constant.

Furthermore, during internal-combustion engine 1 starting, if before two groups of continuous Low, the input of High signal, at first detect the input of first group of Low, High signal, and spray control immediately simultaneously according to while jet controling part 62 by one group of Low, High signal waveform detection portion 56.Situation when fuel injection situation when illustrating that with reference to Figure 14 this sprays control simultaneously and IGNITION CONTROL begin.

Among Figure 14, at moment t0, by there not being illustrated starting motor to force to make the crankshaft rotating of internal-combustion engine.So the 1st to the 3rd cylinder is transferred to suction, compression, outburst, exhaust process separately successively, do not carry out fuel injection and igniting in this stage.Behind moment t0, constantly before the t1, if (promptly from pulse of rotation angle sensor 12 inputs, one group of " L " (low), " H " (height) level signal), then corresponding to the trailing edge of " H " signal, 56 pairs of jet controling part 62 output indications simultaneously of detection unit, corresponding therewith, jet controling part 62 is at the 1st to the 3rd each cylinder while burner oil (many mouthfuls of burner oils simultaneously) simultaneously.That is, at moment t1, the piston that can not differentiate which cylinder is in the position of the predetermined crank angle degree CA2 of before top dead center, thereby can not differentiate the cylinder of answering burner oil and igniting, at the 1st～the 3rd cylinder while burner oil.In the example of Figure 14,,, spray simultaneously in the terminal (position that Figure 14 represents with oblique line) of the 1st cylinder compresses process owing to first group " L ", the input of " H " signal are the scopes that is positioned at the angle A GZ that arrives before top dead center at the piston of the 1st cylinder again.Thereby, spraying in the fuel of each cylinder, the fuel that only sprays to the 2nd cylinder is sucked the cylinder of the 2nd cylinder immediately.

Then, behind moment t1 and constantly before the t2, if from 2 pulse signals of rotation angle sensor 12 inputs, i.e. 2 groups " L ", " H " signal, then corresponding to the trailing edge of the 2nd group of " H " signal, cylinder judegment part 59 carries out cylinder and differentiates.In the example of Figure 14, the piston that is judged to be the 2nd cylinder is in the position of before top dead center predetermined crank angle degree CA2.Therefore, in the compression process of the 2nd cylinder, be right after t2 constantly, the firing command that is produced to the 2nd cylinder firings in IGNITION CONTROL portion 64 by cylinder judegment part 59 produces ignition sparks at the spark plug 6 of the 2nd cylinder.Thereby, the fuel outburst of the 2nd cylinder.Again, produce jeting instructions by judegment part 59 at jet controling part 53, the nozzle ejection fuel by the 3rd cylinder also sucks the 3rd cylinder.

Thereafter, equally before moment t3, if by 3 pulse signals of rotation angle sensor 12 inputs, i.e. 3 groups " L ", " H " signal then respond the trailing edge of the 3rd group of " H " signal, and cylinder judegment part 59 carries out cylinder and differentiates.In the example of Figure 14, the piston that is judged to be the 3rd cylinder is in the position of before top dead center predetermined crank angle degree CA2.Thereby, in the compression process of the 3rd cylinder, be right after constantly t3 after, by cylinder judegment part 59, the instruction that produces to the 3rd cylinder firings in IGNITION CONTROL portion 64, the fuel outburst of the 3rd cylinder.Again, produce jeting instruction by judegment part 59 at jet controling part 53, fuel is injected into the 1st cylinder.

Like this, after the actuating motor starting, state was not how before tube cylinder was judged, in case import 2 pulse signals, then fuel breaks out, thereby has improved starting performance.

Again, in Figure 14, constantly the expression bent axle is forced during the rotary state during t0～t2, constantly t2 represent later on internal-combustion engine not by starting motor and by outburst rotated during.

In the past, owing to spray control simultaneously in the moment that cylinder is judged, thereby start delay.Now this situation is elaborated.In Figure 14, for example the 2nd cylinder is first cylinder that is determined, and in this occasion, judges in end (t2 constantly) at cylinder, sprays control simultaneously.But because of the 2nd cylinder compresses process ends, fuel does not suck the 2nd cylinder.What suction process was arranged is the 3rd cylinder, and outburst is since the 3rd cylinder (t3 constantly).

And in the present invention, instantaneous (t2 constantly) breaks out at the trailing edge from the 2nd pulse signal of rotation angle sensor 12, prior art is in trailing edge (t3 constantly) outburst constantly of the 3rd pulse signal, and both time differences are one group " L ", " H " signal.

The input time of one group " L ", " H " signal is poor, and in the 3 cylinder examples of Figure 14, the crankshaft rotating angle postpones 240CA, the 240CA that has been equivalent to start delay.As mentioned above, spray control simultaneously by first group of input signal, the starting performance of present embodiment is greatly improved.

Then, with reference to the above-mentioned control sequence of flowchart text present embodiment of Figure 15 and Figure 16.Figure 15 and Figure 16 represent the overall process of the above-mentioned control sequence of present embodiment.

At first, if vehicle operators is connected the crankshaft rotating that ignition key switch makes internal-combustion engine 1, in step 1001, judge whether be first group " L ", " H " signal input state.This step is corresponding to detection unit shown in Figure 3 56.If be judged to be first group " L ", the input of " H " signal, then flow process proceeds to step 1002, and in this step 1002, all cylinder sprays simultaneously, proceeds to step 1003 then.

In step 1003, take a decision as to whether two groups " L ", the input of " H " signal, finish the state that cylinder is judged.If cylinder is judged finish, and result of determination be normally ("Yes") that then flow process proceeds to step 1004.Start the fuel injection control (many mouthfuls of fuel of order spray) and the IGNITION CONTROL of each cylinder in step 1004.

After above-mentioned two control beginnings, in the step 1005 that is shown in Figure 16, judge whether cylinder detects successively by predetermined sequence.That is,,, check last time, whether signal mode this determinating mode that number (judgement cylinder) is follow-up number was correct value, and whether input of signal mistake and control misoperation are arranged to the order of input signal pattern along with crankshaft rotating.This flow process is corresponding to cylinder order comparing section 61 shown in Figure 3.

The input sequence of determinating mode be from Fig. 7 to order shown in Figure 10, i.e. the order of signal mode 1～4 is because must repeat, if the signal mode that carries out beyond the said cylinder order judges that then input of decision signal mistake and cylinder are judged the misoperation of control.

For example, if judged that cylinder was the 1st cylinder last time, and along with crankshaft rotating, the determinating mode of up-to-date 2 groups " L ", " H " signal input number is judged to be the 2nd cylinder, and then acts of determination is normal, in step 1006, continue fuel injection control and IGNITION CONTROL, flow process is returned step 1005 once more.

This repeat to be performed until because of key operation close or till other internal-combustion engine halt instruction former thereby that produce provides control unit 11.

To in step 1001 or 1003, the processing when result of determination is "No" explains.

At first, in step 1001, after cylinder judgement control beginning occurring, in the time of can not judging the state of a group " L ", the input of " H " signal,, repeat acts of determination once more through certain hour.Through behind the certain hour, cylinder is judged control break.

Usually, during internal combustion engine start, in actuating motor energising beginning, by the CPU elapsed time instrumentation in the control unit 11.Even passed through certain hour, in the time of still can not determining input signal, be judged as the signal that bent axle does not rotate or do not import rotation angle sensor 12, cylinder is judged control break.

Then, when cylinder is judged to be "No" in step 1003 and step 1005 be judged to be cylinder not in order the time, flow process moves to step 1007, misinterpretation number of times record increases by 1 time.

That is, when step 1003 was judged to be "No", in step 1007, the value of the NG among the RAM of control unit 11 (No Good) number of times memory added 1.This NG time several storagies keep memory contents to discharge until battery terminal, till the engine system of Fig. 1 has a power failure.That is, by discharging battery terminal, NG time several storagies restore.

Like this, flow process proceeds to step 1008 after NG counting number increased.In step 1008, when with reference in the past misinterpretation number of times, i.e. the currency of NG storage during for example greater than 10 times, because of misoperation frequency in the past is made as unstable working state more, carries out the alarm demonstration in step 1009.This control flow is corresponding to the several unusually memory sections 65 of judgement shown in Figure 3.End fuel injection control and IGNITION CONTROL in step 1010.

When NG number in the step 1008 less than 10 the time, then the misoperation of being judged as over is few or sporadic fault only takes place, flow process is returned step 1003, restarts cylinder and judges control.

Here, self-evident though the qualification number of times that NG is judged is defined as 10 times as mentioned above, when reappearing the cylinder misinterpretation, might as well limit number of times to this and change into other value, for example 5 times, or select littler value.

Then, with reference to Figure 17 to Figure 19, illustrate to be shown in mode decision flow process Figure 15 step 1003, that be used for the cylinder judgement.

In step 2001, instrumentation is from the interval of a pulse signal of rotation angle sensor 12, i.e. the endurance of the endurance of 1 group of " L " signal and " H " signal, flow process proceeds to step 2002.

This step 2001 is corresponding to the instrumentation portion 51 that is shown in Fig. 3, and step 2002 is corresponding to the comparing section 55 that is shown in Fig. 3.In step 2002, the time T L of 2 up-to-date pulse signals _OldWith time T L _NewRatio and constant C CL2 relatively, carrying out size judges, if comparative result surpasses constant C CL2, be "Yes", then in step 2003, input signal is judged to be benchmark to be differentiated with signal (the signal mode 4 proportional relations of the time ratio of this state representation input signal and the Figure 10 that had illustrated, and differentiate the decision condition of usefulness signal and the same content of result of determination with the benchmark that is shown in Figure 11).

In step 2002, when result of determination is "No", carry out TL in step 2004 _OldWith TL _NewRatio and the judgement relatively of constant C CL1 size.

If the result who compares to determine is for surpassing constant C CL1, promptly the result is a "Yes", then makes the value of the sign (control signal sign) 1 among the control unit 11RAM for example be " 1 " in step 2005.

Again, if the result of determination of step 2004 is a "No", then in step 2006, make the value of sign 1 for example be " 0 ", flow process proceeds to step 2007.This step 2007 is corresponding to comparing section shown in Figure 3 54.In step 2007, the time T H of 2 more up-to-date pulse signals _OldWith time T H _NewRatio and constant C CH1, and carry out size and judge, if comparative result surpasses constant C CH1, promptly the result is a "Yes", then makes the value of the sign 2 among the RAM be for example " 1 " in step 2008.If the result of determination of step 2007 is a "No", then make the value of sign 2 for example be " 0 " in step 2009.Flow process enters the step 2010 that is shown in Figure 18.

Step 2010 is corresponding to addition portion 52～53 shown in Figure 3 and comparing section 57.In step 2010, the ratio and the constant C LOW of the aggregate value (being ∑ TH) of the aggregate value of 2 more up-to-date " L " signal times (being ∑ TL) and up-to-date two " H " signal times, and carry out size and judge, if comparative result is that the odds ratio constant C CL2 of aggregate value is big, be that comparative result is a "Yes", then the value of the sign in step 2011 makes RAM 3 for example is " 1 ".

If step 2010 compare to determine the result for not ", then make the value of sign 3 for example be " 0 " in step 2012.Then, in step 2013, judge whether indicate 2=" 0 " and sign 3=" 0 ".Flow process from step 2013 to step 2017 is corresponding to judegment part shown in Figure 3 59.If in step 2013, sign 2 and indicate that 3 decision condition sets up simultaneously, even result of determination is a "Yes", then the piston that is judged to be the 1st cylinder in step 2014 is in the position of the AG2 angle of before top dead center.2 up-to-date pulse signals of this state representation are signal modes 1 of Fig. 7 of having illustrated, corresponding to the decision condition and the result of determination of the 1st cylinder shown in Figure 11.

When step 2013 result of determination was "No", flow process proceeded to step 2015.Judge whether indicate 1=" 0 " and sign 2=" 1 " in step 201 5.

When sign 1 in the step 2015 and when indicating that 2 decision condition is set up simultaneously, when even result of determination is "Yes", judge that in step 2016 piston of the 2nd cylinder is positioned at the AG2 angle place of before top dead center.2 up-to-date pulse signals of this state representation are signal modes 2 of Fig. 8 of having illustrated, and it is corresponding to the decision condition and the result of determination of the 2nd cylinder shown in Figure 11.

When step 2015 result of determination was "No", flow process proceeded to step 2017.Judge whether indicate 1=" 1 " and sign 3=" 1 " in step 2017.

In step 2017, when the decision condition of sign 1 and sign 3 was set up simultaneously, even result of determination was a "Yes", then judged that in step 2018 piston of the 3rd cylinder is positioned at before top dead center AG2 angle place.2 up-to-date pulse signals of this state representation are signal modes 3 of Fig. 9 of having illustrated, corresponding to the decision condition and the result of determination of the 3rd cylinder shown in Figure 11.

Carry out the judgement of the 3rd cylinder in step 2018 after, by the step 2020 that is shown in Figure 19, the expression cylinder is judged to be the normally value of (OK), for example " 1 " is arranged in the sign of the expression cylinder result of determination among the RAM.

When step 2017 result of determination is "No", by step 2019 the expression cylinder is judged it is the value of not good enough (NG), for example " 0 " is inserted in the sign of expression cylinder result of determination.

At last, in step 2021, judge that whether proceeding cylinder judges.Judge promptly whether the key operation that is used for locomotive operation closes, or whether the internal-combustion engine halt instruction that is produced by other reason offers control unit 11.When step 2021 result of determination is "Yes", when promptly continuing cylinder and judging control, repeat to be shown in the temporal calculation flow process of the step 2001 of Figure 17 once more.When step 2021 result of determination was "No", cylinder was judged termination.

As mentioned above, walk abreast in the present embodiment and carry out the cylinder judgement, spray control, fuel injection control and IGNITION CONTROL simultaneously.

More than one embodiment of the present of invention are described, but the invention is not restricted to the foregoing description, do not break away from the spirit of the present invention that claim is put down in writing, can make various conversion to embodiment.

For example, in the foregoing description, when the step 1001 of Figure 15 detects " L ", " H " signal, when the instrumentation time ratio of " H " of input signal, " L " the highest rotation number for internal-combustion engine, the endurance of the waveform input signal that should be obtained by rotation angle sensor is during much shorter, think that the signal of above-mentioned instrumentation and detection is not normal input signal, thereby, get rid of it as judging object as noise.This control standard does not influence the effect of judging control as the cylinder of the object of the invention.

Equally, the instrumentation time of 1 group " L ", " H " signal in the step 1001 of Figure 15, engine revolution when being compared to engine starting, look for a long time by the waveform endurance that rotary angle transmitter should obtain, think that the signal of above-mentioned instrumentation and detection is not a normal input signal, thereby get rid of it for judging object, self-evident and above-mentioned explanation is the same also to be fine.

In the step 1003 that is shown in Figure 15,, then carry out next process, i.e. the start up process of fuel injection control and IGNITION CONTROL if the cylinder result of determination is normal again.As an alternative, can be for 2 times normal continuously also in the cylinder result of determination, just enter next process.Can carry out 2 readings that so-called cylinder is judged.

That is, can carry out 2 times from Figure 17 to cylinder result of determination shown in Figure 19, if detect cylinder by 2 cylinders judgements with correct order, then in step 1003 shown in Figure 15, cylinder is judged to be normally.

This control standard when engine starting rotation change is big, owing to must prevent the cylinder misinterpretation, is carried out cylinder judgement accurately, and this is better cylinder decision method.As this 2 cylinder decision procedures, in the moment that receives first group " L ", the input of " H " signal, also shown in the step 1002 of Figure 15, begin to spray simultaneously in the control, after 2 correct cylinders are judged, by igniting starting immediately, the effect of the starting performance that therefore can be improved.

If will further replenish, when obtaining 2 continuous cylinder result of determination, following two kinds of methods are arranged.

The 1st kind of method: carry out the 1st time initial cylinder by input head two groups of " L ", " H " signals and judge, input head two groups of " L ", follow-up two groups " L ", " H " signals in addition of " H " input signal carry out the 2nd cylinder judgement thereafter again.

The 2nd kind of method: by input head two groups of " L ", " H " signals, carrying out initial the 1st cylinder judges, input comprises 2 groups " L ", " H " signal that later half a group " L ", " H " signal and one group of continuous with it signal are formed in employed 2 groups " L ", " H " signal in the head time judgement again, and the 2nd cylinder that carries out thereafter judged.

Can use in above-mentioned two kinds of methods any.

In the step 1005 of Figure 16, when judging that whether cylinder detects with correct order, judge as prerequisite implement the cylinder shown in the flow process of Figure 17 to Figure 19 at every turn again.Replace this way, can after cylinder be judged first, only carry out benchmark and differentiate the input detection of using signal.That is, in the step 1003 that is shown in Figure 15, cylinder be judged to be normal after, the judgement of the step 2001 that is shown in Figure 17 to 2003 controlled by the flow process that is shown in Figure 20 and Figure 21 later.

Figure 20 is explained.In step 3001, whether the cylinder result of determination of determination step 2020 is normal.When the result of determination of step 3001 is "Yes", in step 3002, the state of judging the cylinder memory (corresponding to the number of cylinders addition portion of RAM and Fig. 3 of Fig. 2) is set.

That is,, step 2020 cylinder of Figure 19 is judged to be normal cylinder sequence number as judging that the judgement cylinder sequence number in the cylinder memory is set in step 3002.That is,, will judge that then the cylinder memory is made as 1,2,3 respectively if the cylinder of judging previously is the 1st cylinder, the 2nd cylinder, the 3rd cylinder; Differentiate when using signal when being judged to be benchmark, will judge that then the cylinder memory is made as 4.

Then, in step 3003, judge and whether imported 1 group " L ", " H " signal.If signal is input not, then standby is imported until signal.In signal when input, arranged, when promptly the result of determination of step 3003 is "Yes", by imported up-to-date one group be right after last group of this group " L ", " H " signal of totally 2 groups, take a decision as to whether benchmark differentiation signal in step 3004.It is identical with step 2002 and the step 2003 of Figure 16 with the method for signal to take a decision as to whether the benchmark differentiation, omits its explanation here.

Result of determination in step 3004 is a "Yes", promptly is judged to be benchmark and differentiates when using signal, and flow process proceeds to step 3005.In step 3005, judge that the cylinder memory is set at 4.Flow process proceeds to the step 3008 of Figure 21 then, continues fuel injection control and IGNITION CONTROL.At last, in step 3009, check that whether continuing cylinder judges control.If result of determination is a "Yes", then flow process is returned the judgement of step 3003.

On the other hand, if the result of determination of step 3004 is a "No", then makes and judge that cylinder memory counting adds 1 by step 3006.The value of setting that is step 3002 adds 1.If the result of addition is not 4 in the step 3006, promptly result of determination is a "No", and then flow process proceeds to step 3008.

If the result of determination of step 3007 is a "Yes", judge that promptly cylinder memory addition result is at 4 o'clock, because opposite with the result of determination of step 3004, it is unusual to be judged to be control system, makes NG several memory counts increase in step 3010.The function of this memory is identical with Figure 16 step 1007.

Illustrated as above-mentioned Figure 20 and Figure 21, after carrying out first cylinder judgement, carry out benchmark and differentiate the affirmation of using signal, if to other cylinder, input by signal waveform increases judgement cylinder memory counting, carries out cylinder thus and judges, then judges and must arithmetic expression (1) to (6) 6 formulas of formula compare with common cylinder, differentiate with signal for determinating reference now if computing (6) formula just can, it is minimum can making the computing needed time.Thus, when the internal-combustion engine high speed rotating, also computing can be accurately carried out, thereby accuracy, reliability that cylinder is judged control can be increased.

Again, in the above-described embodiments, though the situation of photocell as rotation angle sensor 12 explained, but it is self-evident, also can use the photocell of other Detecting element replacement LED, at this moment, as the function that requires, as long as can produce signal, can use electromagnetic sensor etc. corresponding to crankshaft rotating.

In the above-described embodiments, spray control immediately simultaneously in 1 group of " L " signal and " H " signal input time (trailing edge of input signal) again.As an alternative, also can be after 1 group of " L " signal and the input of " H " signal, in the end point of " L " signal of importing in succession, promptly the rising edge of " H " signal subsequently sprays control simultaneously.

As mentioned above, owing to can change the timing of spraying simultaneously, from internal combustion engine performance, rotation change reduced when idle running was also arranged, to benefits such as the exhausting air composition influence improve.

Moreover the present invention adopts 1 rotation angle sensor, adopts the signal mode and the corresponding judgement constant of internal combustion engine operation state that constitute with 2 groups " H ", the input of " L " signal to carry out the cylinder judgement.And when starting, before above-mentioned 2 groups " H ", the input of " L " signal, the moment of 1 group " H ", " L " signal input, begin fuel in early days and spray, can seek to improve starting performance.Thereby, even above-mentioned other embodiment does not influence as the raising cylinder judgement of the object of the invention and the function of starting performance yet.

Though the foregoing description is the occasion that the present invention is used for 3 cylinder internal combustion engines, the present invention also is applicable to 4 cylinder internal combustion engines.Hereinafter, the embodiment when being used for 4 cylinder internal combustion engines is illustrated.The pulse signal waveform of the rotation angle sensor 12 of 4 cylinder occasions as shown in figure 22.As shown in Figure 22,, compare, increased the cylinder pulse signal P4 of 1 cylinder part (the 4th cylinder) with the 3 cylinder occasions that are shown in Fig. 4 in the occasion of 4 cylinder internal combustion engines.Thereby, as signal mode, as shown in figure 22, have signal mode 1 ', 2 ', 3 ', 4 ', 5 ' etc. 5 kinds.The signal mode 1 of Figure 22 ', 2 ', 5 ' correspond respectively to the signal mode 1 of Fig. 7, the signal mode 2 of Fig. 8, the signal mode 4 of Figure 10.Thereby, these signal modes 1 ', 2 ', 5 ' in, its terminal point, promptly with these signal modes 1 ', 2 ', pulse signal P1, the P2 that 5 ' terminal point is corresponding, each trailing edge of R, same with the processing of Figure 17～Figure 19 in the foregoing description, can differentiate corresponding cylinder.

But because of signal mode 3 ' with 4 ' identical, even discern this binary signal pattern, can not differentiate corresponding cylinder is the 3rd cylinder or the 4th cylinder.Therefore, in the moment of the trailing edge of first pulse signal, when recognizing signal mode and signal mode 3 ' identical, judge that then corresponding cylinder is the 3rd cylinder.Then, at the trailing edge of next pulse signal, when recognizing signal mode and signal mode 3 ' identical again, then differentiating corresponding cylinder is the 4th cylinder.Like this, continuously the decision signal pattern is 3 ' time of signal mode, think up-to-date signal mode be pattern 4 ', decidable is in the moment of the trailing edge of corresponding pulses signal P4, the piston of the 4th cylinder is positioned at the scope of before top dead center predetermined angle AG2.

Like this, when the present invention is used for 4 cylinder internal combustion engines, also can obtain and the same effect of 3 cylinder occasions.Again, the internal-combustion engine occasion that the present invention is applied to 4 cylinders is same during also with above-mentioned 3 cylinders, and design can be done all conversion.

Can be understood by above-mentioned explanation, cylinder of internal combustion engine of the present invention judges that control gear is to use 1 rotation angle sensor, produces to contain the benchmark cylinder and judge with pulse signal waveform signal, corresponding with each cylinder, thus, carries out the cylinder judgement.Promptly, trailing edge at each up-to-date pulse signal waveform of importing according to crankshaft rotating, with the judgement constant corresponding with the internal combustion engine operation state, identification is carried out cylinder and is judged by the signal mode that the time ratio of up-to-date 2 groups of " L " signal waveforms and " H " signal waveform Time Calculation obtains.Thereby irrelevant with the change of the operating condition of internal-combustion engine, the rotation change state during especially to starting also can be judged whole cylinders of internal-combustion engine.

Again, during starting, before cylinder is judged end, spray control simultaneously, if cylinder judges when finishing that the beginning IGNITION CONTROL then owing to the fuel that internal-combustion engine has sprayed is broken out by ignition spark, can be started immediately, thereby improve starting performance.

Again, the flow chart that is shown in Figure 15～Figure 21 is to be carried out by the program of the ROM in Fig. 2 control unit 11, this program can write in the ROM in advance, also can write storage mediums such as floppy disk, CD-ROM, MO, read this storage medium with the storage medium reader 80 that is shown in Fig. 2, input/output interface in control unit 11 writes in the ROM.Input/output interface in also can control unit 11 connects external network, by external network, through input/output interface program is write ROM.

Other embodiments of the invention are explained.Constitute the period ratio of 2 pulse signals of the signal mode 1～4 that is shown in Fig. 6, each signal mode is had nothing in common with each other.Therefore, in this embodiment, to each signal mode 1～4, obtain the period ratio of 2 pulse signals that constitute these patterns in advance, the period ratio of up-to-date 2 pulse signals by obtaining rotation angle sensor, can differentiate these 2 up-to-date pulse signals and belong to which signal mode, thereby, but countercylinder is differentiated.

Claims (23)

1. a vehicle is with the cylinder decision control device of internal-combustion engine, and it comprises:

Along with the internal-combustion engine rotation, export the rotation angle sensor (12) of the pulse signal of forming by low level and high level in turn;

When importing described pulse signal by described rotation angle sensor, the low duration of the described pulse signal of instrumentation and high level lasting time and the time instrumentation portion (51) that exports in turn;

The signal processing part that the instrumentation portion output of described time is handled; It is characterized in that described signal processing part comprises:

The high level addition portion (52) that is exported after up-to-date high level lasting time and the last high level lasting time addition that is right after of described time instrumentation portion;

The low level addition portion (53) that is exported after up-to-date low duration and the last low duration addition that is right after of described time instrumentation portion;

The low duration of the high level lasting time of more described high level addition portion addition and the addition of described low level addition portion, and the 1st comparing section (57) that its ratio is exported as the 1st ratio;

More described time instrumentation portion up-to-date high level lasting time and the last high level lasting time that is right after, and the 2nd comparing section (54) that its ratio is exported as the 2nd ratio;

More described time instrumentation portion up-to-date low duration and the last low duration that is right after, and with 3rd comparing section (55) of its ratio output as the 3rd ratio;

According to described the 1st, the 2nd and the 3rd ratio of described the 1st, the 2nd and the 3rd comparing section (57,54,55), differentiate the cylinder judegment part (59) that piston is in the cylinder of predetermined crank angle position.

2. cylinder of internal combustion engine as claimed in claim 1 is judged control gear, it is characterized in that, when the piston of described each cylinder of internal-combustion engine arrives predetermined crank angle degree position at every turn, described rotation angle sensor produces the cylinder pulse signal, simultaneously, when the crankshaft of described internal-combustion engine arrives specific degree in crank angle position, produce the benchmark pulse signal.

3. cylinder of internal combustion engine as claimed in claim 2 is judged control gear, it is characterized in that, described predetermined degree in crank angle position is the predetermined angular position that corresponding steam-cylinder piston arrives before top dead center.

4. cylinder of internal combustion engine as claimed in claim 2 is judged control gear, it is characterized in that, further comprises the judgement constant configuration part of setting predetermined a plurality of judgement constants; Described cylinder judegment part is by described the 1st, the 2nd, the 3rd ratio of more described the 1st, the 2nd and the 3rd comparing section and a plurality of judgement constants of being set by described judgement constant configuration part, 2 up-to-date pulse signals of differentiating described rotation angle sensor are corresponding in predetermined a plurality of signal modes which, and differentiate the cylinder that piston is positioned at described predetermined crank angle degree position by the signal mode of judging.

5. cylinder of internal combustion engine as claimed in claim 4 is judged control gear, it is characterized in that each free described corresponding cylinder from rotation angle sensor of described a plurality of prearranged signal patterns was determined with the endurance of the high level of pulse signal or reference pulse signal and the last pulse signal that is right after thereof and the relation of low duration.

6. cylinder of internal combustion engine as claimed in claim 4 is judged control gear, it is characterized in that, further comprises the described internal combustion engine operation status detection of detection portion; Described judgement constant configuration part is corresponding to the operating condition of the internal-combustion engine that is detected by described detection unit, sets the value of described predetermined a plurality of judgement constants.

7. cylinder of internal combustion engine as claimed in claim 6 is judged control gear, it is characterized in that, the state of one or more of a plurality of parameters of the internal combustion engine operation state that described judgement constant configuration part is detected by described detection unit according to expression is set described predetermined a plurality of judgement constants.

8. cylinder of internal combustion engine as claimed in claim 7 is judged control gear, it is characterized in that, described parameter is at least 2 in transit time, fuel injection amount, vehicle to run speed behind the coolant water temperature, inhalation temperature, rotation number, starting of described internal-combustion engine.

9. cylinder of internal combustion engine as claimed in claim 1 is judged control gear, it is characterized in that, further comprise, respond described internal-combustion engine by after the starting motor starting, export the low level and the high level of first pulse signal by described rotation angle sensor, jet controling part when carrying out whole cylinders fuel sprays simultaneously.

10. cylinder of internal combustion engine as claimed in claim 9 is judged control gear, it is characterized in that, further comprise, when carrying out the cylinder differentiation by described cylinder judegment part at every turn, be judged to the IGNITION CONTROL portion that other cylinder is done the igniting indication to this, and the cylinder that should light a fire to the next one of the cylinder of described identification sends the jet controling part that fuel sprays indication.

11. cylinder of internal combustion engine as claimed in claim 4 is judged control gear, it is characterized in that, further comprise, stipulate the means of the cylinder order that described cylinder judegment part should be differentiated, and judge whether the cylinder of being differentiated by described cylinder judegment part is consistent with the cylinder of described regulation, and when judging that both are consistent, judge the correct decision means of cylinder of this differentiation.

12. cylinder of internal combustion engine as claimed in claim 11 is judged control gear, it is characterized in that, further comprises, when the cylinder that described cylinder judegment part is differentiated and the cylinder of described regulation are inconsistent, counts the means of this inconsistent number of times; In case this number of times reaches pre-determined number, promptly send the means of alarm.

13. cylinder of internal combustion engine as claimed in claim 4 is judged control gear, it is characterized in that, further comprises, stipulates the means of the cylinder order that described cylinder judegment part should be differentiated; It is whether the 1st and the 2nd cylinder is consistent with the cylinder of described regulation respectively that judgement is differentiated by described cylinder judegment part, and when being judged to be unanimity, described differentiation is that the 1st cylinder is judged to be correct decision means.

14. cylinder of internal combustion engine as claimed in claim 4 is judged control gear, it is characterized in that, described cylinder judegment part is after carrying out the cylinder differentiation by two pulse signals behind the engine starting, when input low level of 1 pulse signal and high level, only differentiate whether described reference pulse signal of this 1 pulse signal.

15. the vehicle cylinder decision control device of internal-combustion engine, it comprises:

Along with the rotation of internal-combustion engine, export the rotation angle sensor (12) of the pulse signal of forming by low level and high level in turn;

When importing described pulse signal by described rotation angle sensor, the low duration of the described pulse signal of instrumentation and high level lasting time and the time instrumentation portion (51) that exports in turn;

The signal processing part that the instrumentation portion output of described time is handled; It is characterized in that, described signal processing part, the up-to-date high level lasting time of instrumentation portion compares with the last low duration additive value that is right after with last high level lasting time additive value that is right after and up-to-date low duration described time, and with its ratio as the 1st ratio;

The up-to-date high level lasting time of instrumentation portion compares with the last high level lasting time that is right after described time, and with its ratio as the 2nd ratio;

The up-to-date low duration of instrumentation portion compares with the last low duration that is right after described time, and with its ratio as the 3rd ratio;

According to described the 1st, the 2nd and the 3rd ratio, differentiate the cylinder that piston is in the predetermined crank angle position.

16. cylinder of internal combustion engine as claimed in claim 15 is judged control gear, it is characterized in that, described rotation angle sensor, in that the piston of each cylinder of described internal-combustion engine is each when arriving predetermined degree in crank angle position, produce the cylinder pulse signal, simultaneously, when the bent axle of described internal-combustion engine arrives specific degree in crank angle position at every turn, produce the benchmark pulse signal.

17. cylinder of internal combustion engine as claimed in claim 16 is judged control gear, it is characterized in that, described predetermined degree in crank angle position is the predetermined angular position that corresponding steam-cylinder piston arrives before top dead center.

18. cylinder of internal combustion engine as claimed in claim 16 is judged control gear, it is characterized in that, respond described internal-combustion engine by after the starting motor starting, export the low level and the high level of first pulse signal by described rotation angle sensor, jet controling part when carrying out whole cylinders fuel sprays simultaneously; When carrying out the cylinder differentiation by described cylinder judegment part, be judged to the IGNITION CONTROL portion that other cylinder is done the igniting indication to this at every turn; And send the jet controling part that fuel sprays indication to the cylinder that the next one of the cylinder of described identification should be lighted a fire.

19. cylinder of internal combustion engine as claimed in claim 16 is judged control gear, it is characterized in that, further comprises, stipulates the means of the cylinder order that described cylinder judegment part should be differentiated; And judge whether the cylinder of being differentiated by described cylinder judegment part is consistent with the cylinder of described regulation, and when judging that both are consistent, judge the correct decision means of cylinder of this differentiation.

20. cylinder of internal combustion engine as claimed in claim 19 is judged control gear, it is characterized in that, further comprises, when the cylinder that described cylinder judegment part is differentiated and the cylinder of described regulation are inconsistent, counts the means of this inconsistent number of times; In case this number of times reaches pre-determined number, promptly send the means of alarm.

21. the vehicle cylinder decision control device of internal-combustion engine is characterized in that comprising:, export the rotation angle sensor of the pulse signal of forming by high level and low level in turn along with the internal-combustion engine rotation; At every turn when described rotation angle sensor is imported described pulse signal, the time tester of the described pulse signal cycle of instrumentation in turn; By the relation of the period ratio of up-to-date 2 pulse signals of described time tester, differentiate the means of the pulse signal pattern of described rotation angle sensor; By the signal mode of described judgement, differentiate the cylinder judegment part that piston is positioned at the cylinder of predetermined crank angle degree position.

22. cylinder of internal combustion engine as claimed in claim 21 is judged control gear, it is characterized in that, described rotation angle sensor, in that the piston of each cylinder of described internal-combustion engine is each when arriving predetermined degree in crank angle position, produce the cylinder pulse signal, simultaneously, when the bent axle of described internal-combustion engine arrives specific degree in crank angle position at every turn, produce the benchmark pulse signal.

23. cylinder of internal combustion engine as claimed in claim 22 is judged control gear, it is characterized in that, described predetermined degree in crank angle position is the predetermined angular position that corresponding steam-cylinder piston arrives before top dead center.

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