CN1397723A - Fault detecting circuit of fuel injection device - Google Patents
Fault detecting circuit of fuel injection device Download PDFInfo
- Publication number
- CN1397723A CN1397723A CN 02126425 CN02126425A CN1397723A CN 1397723 A CN1397723 A CN 1397723A CN 02126425 CN02126425 CN 02126425 CN 02126425 A CN02126425 A CN 02126425A CN 1397723 A CN1397723 A CN 1397723A
- Authority
- CN
- China
- Prior art keywords
- circuit
- switch element
- fuel injection
- electromagnetic coil
- voltage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/20—Output circuits, e.g. for controlling currents in command coils
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/22—Safety or indicating devices for abnormal conditions
- F02D41/221—Safety or indicating devices for abnormal conditions relating to the failure of actuators or electrically driven elements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/20—Output circuits, e.g. for controlling currents in command coils
- F02D2041/2086—Output circuits, e.g. for controlling currents in command coils with means for detecting circuit failures
- F02D2041/2093—Output circuits, e.g. for controlling currents in command coils with means for detecting circuit failures detecting short circuits
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
A failure detection circuit for a fuel injection system comprises a common switching element 11 or 21 for feeding solenoid valve driving electromagnetic coils 5 and 8, or 6 and 7 of groups discontinuous in fuel injection order, individual switching elements 13, 14, 23 and 24 related to the electromagnetic coils 5 to 8, and off-surge detection circuits 35 and 36 for forming a logical sum of off-surge signals Vs generated at a power interruption to electromagnetic coils of different groups. According to a drop determination and an overlap determination of off-surge signals corresponding to a driving signal pulse train generated by a microprocessor, the output of driving signal pulses to the electromagnetic coils 5 to 8 is stopped to disconnect the common switching element 11 or 12. The invention provided a simple failure detection circuit for a fuel injection system that can ensure a turnout operation by detecting each phase anomaly and interphase short circuit anomaly in a drive circuit of a solenoid valve for fuel injection in each cylinder of a multicylinder engine.
Description
Technical field
The present invention relates to the fault-detecting circuit of the fuel injection system of vehicle-mounted multicylinder engine etc., particularly relate to and detect driving fuel and spray the fault-detecting circuits to carry out abnormal alarm, demonstration and to preserve the fuel injection system of the usefulness that turns round such as broken string with the driving element of broken string, short circuit and the electromagnetic coil of the electromagnetic coil of solenoid valve and distribution, short circuit.
Background technique
Driving fuel is sprayed the control with the electromagnetic coil of solenoid valve, and the general action retentive control of also controlling and utilize light current with quick overexcitation improves the responsiveness of solenoid valve and suppresses temperature rise.Employing is by detecting the broken string of electromagnetic coil, distribution, switching element etc. and the method for short trouble to the voltage of each one of electromagnetic coil driving circuit, the monitoring of electric current.To carry out logic and combination simultaneously for the fault detection signal of multichannel load to simplify signal processing.This notion is as you know.
Japanese kokai publication hei 10-257799 communique " the output open circuit detection device of multichannel road output unit " has shown such notion, for multichannel load as the field coil class of stepper motor, when the non-driving of load, supply with Weak current to load, utilize the principle of voltage increases at the load two ends of load circuit broken string to detect broken string, though do not discuss the short-circuit detecting of anti-load, can use diode OR circuit that the burn out detection signal is supplied with the general circuit that compares to determine.
Yet, Japanese kokai publication sho 62-290111 communique " fault-detecting circuit of fuel injection valve for IC engines drive circuit " has shown such notion, drive the open circuit surge voltage that when energising is opened circuit, takes place with electromagnetic coil by detecting Fuelinjection nozzle, come the broken string and the short trouble of detection electromagnetic coil, distribution and the switching element etc. of blanket property.
Japanese kokai publication hei 9-112735 communique " electromagnetic valve actuator " has shown such notion: about spray the driving electromagnetic coil with solenoid valve as fuel, the dry circuit of fast driving with booster circuit and maintenance effect is set, the charging voltage by the capacitor of monitoring in the booster circuit and broken string that discharge voltage detects electromagnetic coil and distribution thereof and short circuit etc.
Particularly also shown a such notion, drawn routine occasion, a plurality of Fuelinjection nozzles have been driven divide into groups, preserved running smoothly according to fail result with electromagnetic coil at this.
In addition, Japanese kokai publication hei 10-318025 communique " fuel sprays the control gear with sparger " has shown such notion: fuel injection sequence is separated by 2 more than the stroke, and one end of nonoverlapping a plurality of injector coil is connected with public driving output circuit with current"on"time, each switch gear that carries out ON/OFF on the energising sequential of the other end and each injector coil is connected, to realize switch control.
Japanese kokai publication hei 12-380652 communique " abnormal detecting device of onboard electrical load driving system " provides such method, at microprocessor internal the anomaly detection signal of logic and combination is separated detection.Also used this notion in the present invention.
Summary of the invention
In above-mentioned background technique, pointed out the method for detecting abnormality of the whole bag of tricks such as broken string about the switch control unit of broken string, short circuit and this electromagnetic coil of electrical loads such as electromagnetic coil and distribution, short circuit.
But, any technology no matter in the past, all exist such problem: for a plurality of electrical loads comprise layer short circuit and ground connection etc. unusual set various unusual, in system, also do not constitute the fault-detecting circuit that carries out abnormality juding.
The present invention is for addressing the above problem and provide the device of following in faut detection that comprises the countermeasure processing method to produce, and its purpose particularly is to provide the layer short circuit that respectively reaches unusually mutually that can spray the fuel of each cylinder of multicylinder engine with the drive circuit of solenoid valve to detect fault-detecting circuit with the easy fuel injection system of preserving running unusually.
The fault-detecting circuit of fuel injection system of the present invention comprises
Driving is sprayed a plurality of electromagnetic coils of using solenoid valve for the fuel of each cylinder of multicylinder engine,
Produce the microprocessor of drive signal impulse row and quick overexcitation control signal,
According to the drive signal impulse row that produce from described microprocessor, carry out switch motion successively driving a plurality of independent switch elements of corresponding described each electromagnetic coil,
According to the quick overexcitation control signal that produces from described microprocessor, to the fuel injection sequence many groups public switch element that electromagnetic coil in 2 more than the stroke is made up of a plurality of electromagnetic coils at least one groups carries out the integral feed driving of being separated by,
A plurality of open circuit surge voltage testing circuits that the open circuit surge voltage that produces during at least to corresponding with on the same group electromagnetic coil not described independent switch element open circuit detects,
Described microprocessor compares the testing signal that produces from described a plurality of open circuit surge voltage testing circuits, has intactly to fall and repeat to judge unusual according to this testing signal.
In addition, whether the described surge voltage testing circuit of respectively opening a way has surpassed the magnitude of voltage of voltage source by means of the both end voltage value that detects described independent switch element when the described independent switch element open circuit, detects described open circuit surge voltage.
In addition, the described surge voltage testing circuit of respectively opening a way, whether the terminal voltage of the negative terminal of described electromagnetic coil is higher than the voltage of the feed end that is connected with described public switch element during by means of described independent switch element of detection and described public switch element open circuit, detects described open circuit surge voltage.
In addition, the fault-detecting circuit of fuel injection system of the present invention also comprises
Logic and circuit, logic with in conjunction with by each testing signal for the described open circuit surge voltage testing circuit output of the electromagnetic coil of the different group of described public switch element,
Described microprocessor is judged according to the output of described logic and circuit unusually.
In addition, described each public switch element is corresponding to moving from the quick overexcitation control signal of described microprocessor and the light current retentive control signal that is used to keep described electromagnetic coil to move.
In addition, the fault-detecting circuit of fuel injection system of the present invention also comprises
The overexcitation booster circuit that supply voltage is boosted,
Described public switch element, form by high side switch element and low voltage terminal switching element, the high side switch element carries out feed by described overexcitation booster circuit to described potential winding and drives, the low voltage terminal switching element keeps the light current retentive control signal of described electromagnetic coil action to move corresponding to being used to, and drives described electromagnetic coil is carried out feed.
In addition, described each high side switch element share described overexcitation booster circuit, and described overexcitation is public with booster circuit to all electromagnetic coils.
In addition, the fault-detecting circuit of fuel injection system of the present invention also comprises
Be judged to be when unusual according to the testing signal that produces from described open circuit surge testing circuit by described microprocessor, one group of shut-off means of switching on that described public switch element and the independent switch element that be connected in series with this public switch element are cut off,
Utilization is preserved running with the group electromagnetic coil in addition that described independent switch element cuts off.
In addition, described microprocessor is falling to being judged to be according to lacking of described open circuit surge voltage when unusual, if there have have the current"on"time of electromagnetic coil successively to be overlapping, then to shortening current"on"time of described drive signal impulse row processing.
In addition, the fault-detecting circuit of fuel injection system of the present invention also comprises anomaly alarming device, receive abnormal signal and report to the police unusual,
Described microprocessor is being judged to be according to the testing signal that is sent by described open circuit surge voltage testing circuit when unusual, to described anomaly alarming device output abnormality signal.
In addition, described microprocessor has the interface circuit that is connected usefulness with external tool.
Description of drawings
Fig. 1 represents the detailed circuit diagram of the fault-detecting circuit of the fuel injection system relevant with the invention process form 1.
Fig. 2 represents the fragmentary detail view of the fault-detecting circuit of the fuel injection system relevant with the invention process form 1.
Fig. 3 represents the cylinder allocation plan of the fault-detecting circuit of the fuel injection system relevant with the invention process form 1.
Fig. 4 represents the sequential chart that proper functioning is in the fault-detecting circuit of the fuel injection system relevant with the invention process form 1.
Schematic block diagram when Fig. 5 represents fault-detecting circuit middle level unusual of the fuel injection system relevant with the invention process form 1.
Fig. 6 represents that the faut detection of the fuel injection system relevant with the invention process form 1 measures the sequential chart when ground connection is unusual in the road.
Schematic block diagram when Fig. 7 represents that the interlayer short circuit is unusual in the fault-detecting circuit of the fuel injection system relevant with the invention process form 1.
Sequential chart when Fig. 8 represents that the interlayer short circuit is unusual in the group in the fault-detecting circuit of the fuel injection system relevant with the invention process form 1.
Fig. 9 represents the sequential chart of the outer interlayer short circuit of group in the fault-detecting circuit of the fuel injection system relevant with the invention process form 1.
Figure 10 represents working timing figure in the fault-detecting circuit of the fuel injection system relevant with the invention process form 1.
Figure 11 represents the detailed circuit diagram of the fault-detecting circuit in the fuel injection system relevant with the invention process form 2.
Figure 12 represents the detailed circuit diagram of the fault-detecting circuit of the fuel injection system relevant with the invention process form 3.
Label declaration
1 fuel injection control system, 2 power switches, 3 voltage sources, 4 sensor groups, 5～8 electromagnetic coils, 9 microprocessors, 10 the 1st Drive and Control Circuit, 11 public switch elements, 11a high voltage terminal public switch element, 11b low voltage terminal public switch element, the 11c booster circuit, the public booster circuit of 11d, 12 change of current diodes, 12a resistance, 13,14 independent switch elements, 13a, the 14a reference diode, 13b, 14b open circuit surge voltage detects uses diode, 13c, 13d, 14c, the 14d divider resistance, 15 current sense resistors, 16,17 logics and device, 18 logic product devices, 19 light current retentive control circuit, 20 the 2nd Drive and Control Circuit, 21 public switch elements, 21a high voltage terminal public switch element, 21b low voltage terminal public switch element, the 21c booster circuit, 22 change of current diodes, 23,24 independent switch elements, 23b, 24b open circuit surge voltage detects uses diode, 23c, 23d, 24c, the 24d divider resistance, 25 current sense resistors, 26,27 logics and device, 28 logic product devices, 29 light current retentive control circuit, 31～34 diodes, 35 open circuit surge voltage testing circuits, the 35a comparison circuit, 35b, the 35c divider resistance, 36 open circuit surge voltage testing circuits, 36a comparison circuit, 36b, the 36c divider resistance, 37,38 logics and device, 39 open circuit surge voltage testing circuits, 40 external tools, 41 interface circuits, 42 abnormal alarm display unit, 43～46 comparison circuits, 50 bent axles, 51～54 cylinders, 60 ground connection, 61 load short circuits, 62～64 broken string loops, 65 abnormal current waveforms, 66 repeat current waveform, 67 lack to fall surge voltage, and 68 lack falling signal, 70,71 layer short circuits, 72 abnormal current waveforms, 73,74 repeat current waveform, 75 abnormal current waveforms, 76,77 repeat surge voltage, 78,79 duplicate detection signals, 80 decay current waveforms, 81 lack to fall surge voltage, and 82 lack falling signal.
Concrete example
Example 1
Fig. 1 has provided the detailed circuit diagram about the fault-detecting circuit of the fuel injection system of the invention process form 1.Be illustrated with regard to its structure below
Among Fig. 1, fuel injection control system 1 mainly is made of microprocessor the 9, the 1st drive circuit 10 described later and the 2nd drive circuit 20.Power switch 2 is connected between voltage sources 3 such as on-vehicle battery and the above-mentioned fuel injection system 1.
Sensor 4 is made up of crankshaft angle sensor, cam angle sensor and the throttle valve opening sensor etc. of decision sequential and emitted dose usefulness such as (discharge times), supplies with above-mentioned microprocessor 9 by the input signal that this sensor group 4 produces.
The the 1st to the 4th electromagnetic coil 5～8 is by the above-mentioned the 1st and the 2nd Drive and Control Circuit 10,20 drive controlling, this electromagnetic coil 5～8th, and be arranged on Fuelinjection nozzle motor each cylinder on shown in Figure 3 for aftermentioned carries out switch control usefulness.
The following describes the structural element of above-mentioned the 1st Drive and Control Circuit 10.Public switch element 11 is for being connected an end of above-mentioned the 1st, the 4th electromagnetic coil 5,8 and the transistor between the above-mentioned voltage source 3 etc.Change of current diode is connected between the negative terminal of the negative terminal of public switch element 11 and voltage source 3.Independent switch element 13 is connected with the other end of the above-mentioned the 1st electromagnetic coil 5, for the closed transistor of the drive signal SW1 of above-mentioned microprocessor 9 outputs etc.Equally, independent switch element 14 is connected with the other end of the above-mentioned the 4th electromagnetic coil 8, for the closed circuit transistor of the drive signal SW3 of above-mentioned microprocessor 9 outputs etc.
Current sense resistor 15 is connected between the negative terminal of above-mentioned independent switch element 13,14 and voltage source 3, makes different closed circuit of above-mentioned independent switch element 13,14.Logic and device 16 move with the quick overexcitation control signal SW13 of above-mentioned microprocessor 9 outputs, make above-mentioned public switch element 11 conductings, by the output signal of logic product device 18 described later above-mentioned public switch element 11 are carried out ON/OFF control simultaneously.
Logic and device 17 are imported above-mentioned logical product element 18 with above-mentioned drive signal SW1, SW3 as input signal.Light current retentive control circuit 19 is supplied with the ON/OFF control electric current of light current (action keeps using light current) for electromagnetic coil 5 (or 8) action that keeps the 1st (or 4th).For this reason, when light current retentive control circuit 19 both end voltage at above-mentioned current sense resistor 15 were lower than setting value, output light current retentive control signal DT13 made 11 conductings of public switch element by above-mentioned logic product device 18 and logic and device 16.
As the structural element of above-mentioned the 2nd Drive and Control Circuit 20,21～29 is identical with above-mentioned 11～19, and SW4 is equivalent to SW1, and SW2 is equivalent to the signal of SW3, and it is suitable with INJ1 that INJ2 represents, the electromagnetic coil that INJ3 and INT4 are suitable is no longer added to have illustrated here.
It anodally is connected diode 31 with the above-mentioned the 1st the electromagnetic coil 5 and the contact of independent switch element 13, and diode 32 its positive poles are connected with independent switch element 23 with electromagnetic coils 6 of the above-mentioned the 2nd.Equally, its positive level of diode 33 is connected with the above-mentioned the 3rd the electromagnetic coil 7 and the contact of independent switch element 24, and diode 34 its positive poles are connected with the above-mentioned the 4th the electromagnetic coil 8 and the contact of independent switch element 14.
Open circuit surge voltage testing circuit 35 contains comparison circuit 35a, and the voltage that divider resistance 35b, 35c will be fed out by the negative pole of above-mentioned diode 31,33 carries out dividing potential drop.Open circuit surge voltage testing circuit 36 contains not shown comparison circuit 36a, and the voltage that not shown divider resistance 36b, 36c will be fed out by the negative pole of above-mentioned diode 34,32 carries out dividing potential drop.
Here, above-mentioned comparison circuit 35a has been made such structure: through the branch pressure voltage of divider resistance 35b, 35c dividing potential drop during greater than the voltage of voltage source 3, produce the testing signal IN13 of logic level " L ", supply with above-mentioned microprocessor 9, equally, above-mentioned comparison circuit 36a is through the branch pressure voltage of divider resistance 36b, 36c dividing potential drop during greater than the voltage of voltage source 3, produce the testing signal IN42 of logic level " L ", supply with above-mentioned microprocessor 9.
External tool can write control program to above-mentioned microprocessor, can read and show the content of not shown data storage.Interface circuit 41 is arranged between external tool 40 and the above-mentioned microprocessor 9.The abnormal alarm display unit is moved according to abnormal signal of above-mentioned microprocessor 9 etc.
Fig. 2 shows the partial detailed figure about the feed circuit corresponding with the 1st electromagnetic coil 5 among Fig. 1.Below structure is illustrated.
Among Fig. 2, pull down resistor 12a is in parallel with above-mentioned change of current diode 12, the OFF voltage limitation function that reference diode 13a, 14a can equivalence performance independent switch elements 13,14, and it is the electric current that flows through on the 1st electromagnetic coil that action keeps with light current Ih.
Open circuit surge voltage Vs all is when taking place when public switch element 11 and independent switch element 13 open circuits, this open circuit surge voltage Vs is produced by the counterelectromotive force of wanting to press maintenance has just been flow through on the 1st electromagnetic coil action to keep taking place with light current Ih, and its value equates substantially with the deboost of above-mentioned equivalent reference diode 13a.
But this open circuit surge voltage Vs servo-actuated is done to keep descending rapidly with the decay of light current Ih, is determined to become Vs=0 behind the voltage by pull down resistor 12a.
Because the short circuit of independent switch element 13 is unusual etc., independent switch element 13 is not opened a way, and when ending feed by public switch element 11, makes change of current open circuit by change of current diode 12 and independent switch element 13.Owing to made such structure, thus field coil fast shut-off not, the surge voltage of not opening a way Vs.
On the other hand, independent switch element 13 is in when open circuit, and for to the 4th electromagnetic coil 8 feeds, 14 conductings of independent switch element when public open element 11 actions, have produced the feed voltage Vb of the output terminal of public switch element 11, as the output of diode 31.This occurs as apparent open circuit surge voltage Vs, but as the Vs of actual open circuit surge circuit than the also big (Vb＜Vs), extract out of feed voltage Vb so can separate by above-mentioned comparison circuit 35a.
Fig. 3 is the cylinder allocation plan of the fault-detecting circuit of fuel injection system shown in Figure 1.Among Fig. 3,50 is the bent axle of motor, and 51～54 for being carried out the 1st to the 4th cylinder that fuel sprays by above-mentioned electromagnetic coil 5～8.
In the 1st moment, the independent switch element 13 and the element 11 that holds open switch move, and realize spraying for the fuel of the 1st cylinder 51 by the 1st electromagnetic coil 5 being carried out feed.Then, the 2nd constantly, independent switch element 24 and the action of public switch element, by being realized, sprays thereafter constantly the 3rd electromagnetic coil feed the 3rd for the fuel of the 3rd cylinder 53, independent switch element 14 and 11 actions of public switch element are by realizing the fuel injection to the 4th cylinder 54 to the 4th electromagnetic coil 8 feeds.In the 4th moment, independent switch element 23 and 21 actions of public switch element are by realizing the fuel injection to the 2nd cylinder 52 to the 2nd electromagnetic coil 6 feeds.
In above-mentioned this assortment, when spraying, the wherein some fuel of the 1st cylinder 51 or the 4th cylinder 54 becomes when unusual, the 1st cylinder 51 and the 4th cylinder 54 are all stopped, it is comparatively stable only to preserve running by the 2nd cylinder 52 and the 3rd cylinder 53, when spraying, the wherein some fuel of the 2nd cylinder 52 or the 3rd cylinder 53 becomes when unusual, the 2nd cylinder 52 and the 3rd cylinder 53 are all stopped, and it is comparatively stable only to preserve running by the 1st cylinder 51 and the 4th cylinder 54.Public switch element 11 and 12 among Fig. 1 becomes and the corresponding structure of this grouping.
The drive signal of the microprocessor 9 among Fig. 1, SW1～SW4 are the numberings that adopts according to fuel injection sequence.
Fig. 4 is the sequential chart about the regular event explanation usefulness of the fault-detecting circuit of the fuel injection system of this example 1.Among Fig. 4, Fig. 4 (a) is the output characteristics of the quick overexcitation control signal SW13 of microprocessor 9, Fig. 4 (b) is the output characteristics of light current retentive control signal DT13, Fig. 4 (c) is the output characteristics of the drive signal SW1 of microprocessor 9, Fig. 4 (d) is the output characteristics of the drive signal SW3 of microprocessor 9, Fig. 4 (e) is the output characteristics of the quick overexcitation control signal SW42 of microprocessor 9, Fig. 4 (f) is the output characteristics of light current retentive control signal DT42, Fig. 4 (g) is the output characteristics of the drive signal SW4 of microprocessor 9, and Fig. 4 (h) is the output characteristics of the drive signal SW2 of microprocessor 9.
Above-mentioned drive signal SW1～SW4 produces output in order, and overexcitation signal SW13 produces the output signal of short time according to the output timing of drive signal SW1 and SW3 fast.Overexcitation signal SW42 produces the output signal of short time according to the output timing of drive signal SW4 and SW2 equally, fast.
Fig. 4 (i) is the current waveform of the 1st electromagnetic coil 5, and Fig. 4 (a) and (b), (c) are obtained after synthesizing.Equally, Fig. 4 (j) is the current waveform of the 4th electromagnetic coil 8, and Fig. 4 (a) and (b), (d) are obtained after synthesizing.Fig. 4 (k) is the current waveform of the 2nd electromagnetic coil 6, and Fig. 4 (e), (f), (g) are obtained after synthesizing.Fig. 4 (l) is the current waveform of the 3rd electromagnetic coil 7, and Fig. 4 (e), (f), (h) are obtained after synthesizing.
Fig. 4 (m) is the output waveform of diode 31, when the 1st electromagnetic coil 5 failures of current of Fig. 4 (i), be that the output of the drive signal SW1 of Fig. 4 (c) produces open circuit surge voltage Vs when stopping, produce feed voltage Vb in 8 energisings of the 4th electromagnetic coil according to the switch motion of the element ll that holds open switch.
Equally, Fig. 4 (n) is the output waveform of diode 34, and Fig. 4 (o) is the output waveform of diode 32, and Fig. 4 (p) is the output waveform of diode 33.
Fig. 4 (q) is the waveform of testing signal IN13, and at Fig. 4 (m) with (p), diode 31,33 is logic level " L " when output open circuit surge voltage Vs.Equally, Fig. 4 (r) is the waveform of testing signal IN42, and at Fig. 4 (n) with (o), diode 34,32 is logic level " L " when output open circuit surge voltage Vs.
The following describes the concrete faut detection of the fault-detecting circuit of the fuel injection system in this example 1.Fig. 5 is about schematic block diagram unusual in the layer.Ground connection 60 has provided the state that the negative terminal of the 1st electromagnetic coil 5 is connected with the negative terminal of voltage source 3, and when the ground connection of this state was taken place, the electric current that flows through on the electromagnetic coil 5 can not end fast, and open circuit surge voltage Vs does not take place.
This phenomenon is identical with the short circuit abnormal case of independent switch element 13, even cut off feed by public switch 11, by change of current diode 12 and ground circuit 60 or short circuit the independent switch element, therefore field current refluxes, and open circuit surge voltage Vs no longer takes place.
Load short circuits 61 has provided the state of short circuit between the positive and negative terminal of the 4th electromagnetic coil 8.When this load short circuits 61 takes place when, on electromagnetic coil 8, no longer flow through field current, therefore when independent switch element 14 open circuits, the surge voltage of not opening a way Vs.
In addition; when load short circuits, independent switch element 13,14,23,24 and public switch element 11,12 are protected at short notice owing to the excess current protective function of himself; remove the drive instruction signal by microprocessor 9 immediately, protect it not to be subjected to scaling loss thus.
62～64 have provided the broken string open circuit, and when situations such as generation distribution broken string, coil breakage and switching element open fault, field current during independent switch element 23,24 open circuits, open circuit surge voltage Vs takes place no longer no longer by electromagnetic coil 6,7.
Fig. 6 is the sequential chart that the action specification when ground connection is unusual among Fig. 5 is used.Below the different place of sequential chart of main explanation and regular event shown in Figure 4.
Abnormal current waveform 65 expression of Fig. 6 (i) because of ground connection 60 on current sense resistor 15 (with reference to Fig. 1) by field current for the 1st electromagnetic coil 5, do not keep current waveform thereby do not move with the light current drive controlling.The 4th electromagnetic coil 8 that repeats current waveform 66 expression electric currents and Fig. 6 (j) is basic identical, and the electric current that did not flow through on the 1st electromagnetic coil 5 of ground connection originally owing to the action of public switch element 11 becomes the state that flows through.
The surge voltage 67 that lacks to fall of Fig. 6 (m) has provided because of ground connection 60 makes the field current of the 1st electromagnetic coil 5 and has not ended rapidly, makes the open circuit surge voltage Vs that should take place originally thus and the situation that do not have to take place.The scarce falling signal 68 of Fig. 6 (q) has provided the state that does not exist in the testing signal that should take place originally because of the above-mentioned relation that lacks to fall surge voltage.
As mentioned above, when detect by the open circuit surge voltage Vs that causes unusually in the various layer lack to fall the time, shown in Figure 10 as described later, lack to fall the public switch element of layer and all independent switch elements that are connected in series with this public switch element and all cut off, realize spraying as the fuel of preserving running by the electromagnetic coil of left group.
But, both sides' group all open a way surge voltage Vs lack to fall the time, all switching elements are cut off, motor can not rerun.
Fig. 7 is about the unusual schematic block diagram of interlayer.Among Fig. 7, layer short circuit 70 has provided the state of short circuit between the negative terminal of the 1st and the 4th electromagnetic coil 5,8.Layer short circuit 71 has provided the state of short circuit between the negative terminal of the 2nd and the 4th electromagnetic coil 6,8.Above-mentioned layer short circuit 70 is interlayer short circuit in the group that takes place between the electromagnetic coil that is driven by identical public switch element 11, the layer short circuit between the group that takes place between the electromagnetic coil of the public switch element drives that above-mentioned interbed short circuit 71 is served as reasons different.
Fig. 8 is the sequential chart that the action specification when the interlayer short circuit is unusual in the group among Fig. 7 is used.Below the sequential chart place inequality of main explanation and regular event shown in Figure 4.
The abnormal current waveform 72,75 of Fig. 8 (i), (j) has provided because of layer short circuit 70 concerns that the 1st, the 4th electromagnetic coil 5,8 results as parallel connection move and has kept the state that reduces by half with light current IH.
The unnecessary repetition current waveform of the repetition current waveform 73,74 of Fig. 8 (i), (j) for not flowing through originally as the 1st, the 4th electromagnetic coil result in parallel because of the layer short circuit relation.
The open circuit surge voltage Vs in above-mentioned repetition current waveform 73,74 ends is followed in repetition surge voltage 76,77 expressions of Fig. 8 (m), (n), and the duplicate detection signal in above-mentioned repetition surge voltage 76,77 is followed in repeating signal 78,79 expressions of Fig. 8 (q), (r).
Fig. 9 is the sequential chart that the action specification the when layer short circuit between the group is unusual among Fig. 7 is used.Below the difference of main explanation and the sequential chart of regular event shown in Figure 4.
In the layer short circuit of the such leap group of layer short circuit 71, all independent switch elements 13,14,23,24 are in each other the not state of conducting simultaneously (being that fuel injection time is shorter), each electromagnetic coil 5～8 all is subjected to normal control, carry out the action identical, but different is for not detecting the unusual state of layer short circuit with Fig. 4 sequential chart.
In contrast, it is long that Fig. 9 shows fuel injection time, the sequential chart the during conducting simultaneously of adjacent sequenced electromagnetic coil.
The state that the action maintenance that the decay current waveform 80 expression independent switch elements 14 of Fig. 9 (j) and public switch element 11 open circuit backs are flow through on the 4th electromagnetic coil decays by change of current diode 12, layer short circuit switch 71 and independent switch element 23 with light current IH.Fig. 9 (n) lacks to fall the state that open circuit surge voltage Vs that surge voltage 81 expression should not take place by fast shut-off originally because of the 4th electromagnetic coil 8 does not have generation.Equally, the expression of the scarce falling signal 82 of Fig. 9 (r) lacks to fall the state that testing signal that surge voltage 81 relations should take place originally not have generation because of above-mentioned.
Unusually there are 4 kinds about the layer short circuit between the leap group of above-mentioned electromagnetic coil negative terminal configuration, but it is no matter any, since action in time have one side of action earlier of solenoid valve successively produce open circuit surge voltage Vs lack to fall, so drive the public switch element and the independent switch element of action one side electromagnetic coil earlier as long as cut off, its game method is identical with the interior abnormal case of the layer of Fig. 5, method of disposal can be unified like this, is desirable.
But about the layer short circuit between this group, if shorten fuel injection time, the discharge time that do not overlap does not just need to cut off public switch element and independent switch element.Even send out public switch element and independent switch element disconnected, the public switch element and the independent switch element of back action one side are also unaffected.
Be used for illustrating the overall work situation of the fault-detecting circuit of above-mentioned fuel injection system about this example 1 below with the sequence of movement of microprocessor shown in Figure 10 9.
Among Figure 10,100 begin step for work, 101 for judging the step of the reset instruction that external tool 40 inputs of having no way of are arranged after beginning step 100, the step that 102 fault messages that will be stored in the RAM storage in the microprocessor 9 when the determination step 101YES reset, whether the action of 103 step determination steps 102 finishes, when being NO, above-mentioned steps 101 whether is connected, though or connect the sense order that has the external tool of having no way of to export when not exporting reset instruction with external tool.
Fault message in the 104 RAM storagies that will be stored in when the determination step 103YES in the microprocessor 9 is sent into the step of external tool 40, whether the action of 105 step determination steps 104 finishes, when being NO, above-mentioned steps 103 whether is connected with external tool, though or connect, whether drive signal SW1～SW4 in generation when not exporting sense order.When not carrying out the fuel injection for NO, above-mentioned steps 105, do not come back to beginning step 100 to end step 106 transition.
107 steps are upgraded the up-to-date situation occurred of the drive signal SW1～SW4 of repetitive operation during for YES and are obtained in above-mentioned steps 105,108 steps after step 107 with testing signal IN13, the up-to-date input status of IN14 upgrades and obtains, 110 steps are judged lower edge change point (the time change point of logic level " H " → " L ") the back testing signal IN13 of drive signal SW1～SW4 after 108 steps, whether IN14 lacks to fall, whether 111 steps have gravity treatment in the drive signal impulse that determination step 110 is obtained renewal in 105 steps during for YES lists driving time and have logical time of electromagnetic coil successively, 112 steps are stored this state thereafter and are shortened current"on"time when determination step 111 is XES, abnormal alarm display unit 42 is produced report to the police simultaneously, show output.Till this stored information is stored always and is resetted by 102 steps.
When 113 steps are NO in above-mentioned 111 steps, to the open circuit surge voltage Vs of above-mentioned 110 steps lack to fall corresponding with which drive signal, the open circuit surge voltage Vs of the electromagnetic coil of which layer lacks the information that falls and determines and store.114 steps will drive the public switch element cut-out that the open circuit surge voltage lacks to fall the electromagnetic coil of layer after this step, 115 steps produce alarm indications output to abnormal alarm display unit 42.Finish in this 115 step, or above-mentioned 110 steps are NO, or carry out the transition to 120 steps during the release of above-mentioned 112 steps.
In 113 steps, detect the layer internal faults such as short circuit, broken string and open circuit of electromagnetic coil, distribution, driving element, cut off public switch element 11 (or 12) by 114 steps, simultaneously, for safety, the logical cut-out of group that independent switch element 13,14 (or 23,24) is also cut off.
In 112 steps, make electromagnetic coil successively not have the energising overlapping time, as between the group of Fig. 7 between the layer short-circuit loop 71 unusual discharge time restraining device does not take place.
Whether 120 steps are to still repeating to take place superfluous testing signal IN13, IN42 behind the lower edge change point (the time change point of logic level " H " → " L ") at drive signal SW1～SW4, when 121 steps are YES at this determination step, to the repetition of the open circuit surge voltage Vs corresponding with which drive signal, the layer short circuit of the electromagnetic coil of which layer is determined storage.122 steps public switch element to the electromagnetic coil that drives layer short circuit after 121 steps cuts off, and 123 steps produce alarm indications output to abnormal alarm display unit 42.Finish in this 123 step, or above-mentioned 120 steps enter end step 106 when being NO, come back to beginning step 100.
121 steps are as for interlayer short-circuit loop in the group of Fig. 7 being unusual seizure the as the 1st, the 4th electromagnetic coil 5,8, cut off public switch element 11 by 122 steps, for safety simultaneously, the group energising that independent switch element 13,14 is also cut off is cut off.
Carry out in above-mentioned 113 and 121 steps electromagnetic coil numbering of the layer behind the abnormality juding or the numbering cylinder of motor etc. be stored in can maintenance when having a power failure with battery RAM storage or EE-PROM etc. do not erase in the storage, read demonstration external tool 40 by 104 steps during maintenance overhaul, and reset to A-stage by 102 steps.
Example 2
Figure 11 is the detailed circuit diagram about the fault-detecting circuit of the fuel injection system of the invention process form 2.Below the difference of main explanation and example 1.
Among Figure 11, in the 1st Drive and Control Circuit 10, high side switch element 11a is by the quick overexcitation control information SW13 control of switching on, the light current retentive control signal DT13 that low voltage terminal switching element 11b is exported with the light current road retentive control circuit 19 identical with above-mentioned example 1 moves, with the control of switching on.Booster circuit 11c carries out feed by high side switch element 11a to the 1st, the 4th electromagnetic coil 5,8 from above-mentioned booster circuit 11c for circuit, the diode 16a that the voltage with voltage source 3 boosts.On the other hand, diode 16b carries out feed by low voltage terminal switching element 11b to the 1st, the 4th electromagnetic coil 5,8 from voltage source 3.Among Figure 11, be the state that public switch element 11 is divided into high side switch element 11a and low voltage terminal switching element 11b shown in Figure 1, but all be public switching elements that this point does not change to the 1st, the 4th electromagnetic coil 5,8 feeds.About the 2nd Drive and Control Circuit 20, its structure is the same with above-mentioned the 1st Drive and Control Circuit 10, no longer has been illustrated here.
Describe the action of said structure below in detail.
In the fault-detecting circuit of the fuel injection system of structure shown in Figure 11, voltage source 3 as be the on-vehicle battery of DC12V, booster circuit 11c, 21c are as the high-voltage power from DC12V generation DC120V, fast driving electromagnetic coil.
Low voltage terminal switching element 11b, 21b keep using with light current Ih for supplying with the electromagnetic coil action, heat up by suppress booster circuit 11c, 21c from voltage source direct feed.
In the fault-detecting circuit of this example 2, with the fault-detecting circuit comparison in the above-mentioned example 1, the field current of electromagnetic wire Fig. 5～8 reduces, so can reduce the temperature rise of public switch element and independent switch element.
Example 3
Figure 12 is the detailed circuit diagram of fault-detecting circuit of the fuel injection system of the invention process form 3.Below the difference of main explanation and Fig. 1 occasion.
Among Figure 12, the circuit that booster circuit 11d boosts for the supply voltage with voltage source 3.High side switch element 11a is by the quick overexcitation control signal SW13 control of switching on, and low voltage terminal switching element 11b is with the light current retentive control signal DT13 control of switching on.Diode 16a carries out feed by high side switch element 11a to the 1st, the 4th electromagnetic coil 5,8 from above-mentioned booster circuit 11d.On the other hand, diode 16b carries out feed by low voltage terminal switching element 11b to the 1st, the 4th electromagnetic coil 5,8 from voltage source.
Equally, high side switch element 21a is by the quick strive forward magnetic control system signal SW42 control of switching on, and low voltage terminal switching element 21b is with the light current retentive control signal DT42 control of switching on.Diode 26a carries out feed by high side switch element 21a to the 2nd, the 4th electromagnetic coil 6,7 from above-mentioned booster circuit 21d.On the other hand, diode 26b carries out feed by low voltage terminal switching element 21b to the 2nd, the 4th electromagnetic coil 6,7 from voltage source 3.
In the above range, compare with above-mentioned example, different only is that booster circuit 11c21c is public, is public booster voltage 11d.
Pull down resistor 12a is in parallel with change of current diode 12, and divider resistance 12b, 12c carry out dividing potential drop with the voltage of voltage source.Compensating resistance 12d is connected between above-mentioned pull down resistor 12a and the divider resistance 12c, and the voltage of above-mentioned divider resistance 12c is applied to the non-counter-rotating input end of comparison circuit 43,44.
Resistance R12b, the R12c of the 2a of the resistance of pull down resistor 12a and other divider resistance 12b, 12c and compensating resistance 12d, R12d compare, and setting value is much smaller.
Same pull down resistor 12a is in parallel with change of current diode 22, and divider resistance 22b, 22c carry out dividing potential drop with the voltage of voltage source 3.Compensating resistance 22d is connected between above-mentioned pull down resistor 22a and the divider resistance 22c, and the voltage of above-mentioned divider resistance 22c is applied to the non-counter-rotating input end of comparison circuit 45,46.
Resistance R22b, the R22c of the resistance R22a of pull down resistor 12a and other divider resistance 22b, 22c and compensating resistance 22d, R22d compare, and setting value is much smaller.
13b is the diode of open circuit surge voltage detection usefulness, and 13c, 13d are divider resistance.Above-mentioned diode 13b and divider resistance 13c, 13d are connected in series mutually, are connected between the negative terminal of the negative terminal of the 1st electromagnetic coil 5 and voltage source 3.The voltage of divider resistance 13d is applied to the counter-rotating input end of comparison circuit 43.
Equally, 14b, 23b, 24b are the diode that the open circuit surge voltage detects usefulness, and 14c, 14d, 23c, 23d, 24c, 24d are divider resistance, and same, the voltage of each divider resistance 13d, 23d, 24d is applied to the counter-rotating input end of comparison circuit 44～46.
Logic and circuit 37, even one of them output of above-mentioned comparison circuit 43 or 46 is logic level " L ", also the testing signal IN13 with logic level " L " supplies with microprocessor.Equally, logic and circuit 38, even one of them output of above-mentioned comparison circuit 44 or 45 is logic level " L ", also the testing signal IN42 with logic level " L " supplies with microprocessor.
Open circuit surge voltage testing circuit 39 is made of above-mentioned comparison circuit 43,44 and comparison circuit 45,46.
About the action of said structure, the action with comparison circuit 43 is main being illustrated below.
At first, high side switch element 11a and 13 conductings of independent switch element, the 1st electromagnetic coil 5 high speed motion, then high side switch element 11a is cut off, and is undertaken to keeping the light current control of action by low voltage terminal switching element 11b.
Soon, drive signal SW1 becomes logic level " L ", and low voltage terminal switching element 11b and independent switch element 13 are when being cut off, the negative terminal of the electromagnetic coil 5 the 1st produces open circuit surge voltage Vs shown in Figure 2, and the branch pressure voltage after divider resistance 13c, 13d dividing potential drop is supplied with the counter-rotating input end of comparison circuit 43.
On the other hand, the voltage of the non-counter-rotating input end of the comparison circuit 43 on this time point is because the voltage at pull down resistor 12a two ends is zero substantially, so become resistance value R12b and (12C//R12d) supply voltage is carried out low value after the dividing potential drop.(R12c//R12d) be the combined resistance in parallel of resistance R 12c and R12d.
Therefore, the input voltage of circuit 43 as a comparison, non-counter-rotating input end is lower than the counter-rotating input end, and the output of comparison circuit 43 produces the normal testing signal of logic level " L ".
But, because of the short circuit current relation, 1st, during the short circuit of the contact of the 4th electromagnetic coil 5,8 on power circuit, the branch pressure voltage that is applied to the non-counter-rotating input end of comparison circuit 43,44 will become resistance value (R12b,, R12d) and R12c supply voltage will be carried out high value after the dividing potential drop.(R12b//R12d) be the combined resistance in parallel of resistance R 12b and R12d.
Therefore, the input voltage of circuit 43 as a comparison, non-counter-rotating input end is a high voltage, comparison circuit 43 is output as logic level " H ", the detection of the surge voltage of not opening a way.
Like this, as adopt the fault-detecting circuit of fuel injection system shown in Figure 12, the short circuit that can detect public switch element one side is unusual, for other electromagnetic coil too.
Unusual for this short circuit, in 113 steps of Figure 10, definite and storage lacks to fall layer, is kept the disconnection of public switch element 11 and independent switch element 13,14 by 114 steps.
In addition, the common junction of the common junction and the 2nd of the 1st, the 4th electromagnetic coil 5,8, the 3rd electromagnetic coil 6,7 is that short circuit is when connecting by the short circuit current 141 between the group, when having current"on"time of electromagnetic coil successively not overlap, do not take place any unusually, the existence of short circuit current 141 does not detect yet.
On the other hand, when having current"on"time of electromagnetic coil successively that overlapping is arranged, during independent switch element open circuit, because the voltage increases of comparison circuit 13b, the 14b of Figure 12, the non-counter-rotating input end of 23b, 24b, so become the state that can not detect open circuit surge voltage Vs, the processing of shortening current"on"time by 112 steps of Figure 10 is handled by this and to be realized preserving running.
Example 4
In this above-mentioned example 1 to 3,, adopted to suppress the method for operation that keeps away from of discharge time correspondence for the layer short circuit between the group.But also can not suppress the processing of discharge time, and wait and realize that one group of energising cuts off by cutting off the public switch element.
Use 4 cylinders to be illustrated above, even but be the motor of 6 cylinders, cylinder, 2 groups public switch element also can be used, or 3 groups (6 cylinder), 4 groups (8 cylinders) are pressed the public switch element of group differentiation.
Further, when motor is the gasoline motivation, when fuel injection system comprises the IGNITION CONTROL function of motor, draw between during unusual the generation in district's running, except that fuel injection control is proofreaied and correct, go back recoverable firing time, can carry out more stable preservation running like this.
In addition, the abnormal alarm display unit to as between draw demonstration in the district running, Quan Zuwei stops the state that fuel sprays etc. unusually fully, or sprays according to broken string, the short circuit of the group of ignition mechanism, the fuel that catches fire etc. and to dispose etc., can carry out warning and demonstration comprehensive, graded properties.
As mentioned above, employing is about the fault-detecting circuit of fuel injection system of the present invention, detection fuel injection control that not only can be by the blanket property of simple open circuit surge voltage testing circuit is with short circuit, broken string, the open circuit of electromagnetic coil and switching element, distribution etc., and can also lacking to fall decision maker and repeat decision maker and come short trouble between detection layers by the open circuit surge voltage.And,, can realize stable preservation running by grouping to the public switch element.
Because the Current Control for electromagnetic coil is carried out in public switch element one side, so, can easily detect the open circuit surge voltage by the voltage at independent switch element two ends is monitored.
Because two terminal potentials by electromagnetic coil detect the open circuit surge voltage, so the mutual short circuit that reaches unusually between the group for the short circuit of public switch element also detects easily.
Because suitably open circuit surge voltage testing circuit is carried out logic and combination by logic and circuit, thus the repetition of decidable open circuit surge voltage, but also the input that can reduce microprocessor is counted and hardware.
Because available public switch element carries out quick overexcitation control separately and action keeps the light current control of usefulness, there is the feed control circuit to simplify low effect that electromagnetic coil is withstand voltage.
Because the public switch element divisions can be carried out the action retentive control of high-tension quick overexcitation and low voltage, reduce so flow to the magnitude of current of public switch element, heating reduces, and device volume diminishes.
Because can use independent overexcitation booster circuit, realize quick overexcitation, so the effect that device is little, cost is low is arranged to all electromagnetic coils.
Because when cutting off the public switch element, can suitably divide into groups with unusual generation, so, can realize stable preservation running by the electromagnetic coil relevant with remaining public switch element.
For the short circuit between on the same group is not unusual,, can realize the more stable running of keeping out of the way by shortening the current"on"time of above-mentioned drive signal impulse row.
Because,, improved completeness so can report to the police to all faults of general imagination according to the lacking to fall/repeat to report to the police unusually and show of open circuit surge circuit.
Because microprocessor has the interface circuit that is connected usefulness with external tool, so identifying information that unusual electromagnetic coil takes place can be read and shown to external tool, can improve the working efficiency of maintenance thus, can stored information be got back to original state easily from external tool simultaneously.
Claims (11)
1. the fault-detecting circuit of a fuel injection system is characterized in that, comprises a plurality of electromagnetic coils of driving for the fuel injection usefulness solenoid valve of each cylinder of multicylinder engine, produces the microprocessor of drive signal impulse row and quick overexcitation control signal,
According to the drive signal impulse row that produce from described microprocessor, carry out switch motion successively driving a plurality of independent switch elements of corresponding described each electromagnetic coil,
According to the quick overexcitation control signal that produces from described microprocessor, to the fuel injection sequence many groups public switch element that electromagnetic coil in 2 more than the stroke is made up of a plurality of electromagnetic coils at least one groups carries out the integral feed driving of being separated by,
A plurality of open circuit surge voltage testing circuits that the open circuit surge voltage that produces during at least to corresponding with on the same group electromagnetic coil not described independent switch element open circuit detects,
Described microprocessor compares the testing signal that produces from described a plurality of open circuit surge voltage testing circuits, has intactly to fall and repeat to judge unusual according to this testing signal.
2. the fault-detecting circuit of fuel injection system as claimed in claim 1 is characterized in that,
Whether the described surge voltage testing circuit of respectively opening a way has surpassed the magnitude of voltage of voltage source by means of the both end voltage value that detects described independent switch element when the described independent switch element open circuit, detects described open circuit surge voltage.
3. the fault-detecting circuit of fuel injection system as claimed in claim 1 is characterized in that,
The described surge voltage testing circuit of respectively opening a way, whether the terminal voltage of the negative terminal of described electromagnetic coil is higher than the voltage of the feed end that is connected with described public switch element during by means of described independent switch element of detection and described public switch element open circuit, detects described open circuit surge voltage.
4. the fault-detecting circuit of fuel injection system as claimed in claim 1 is characterized in that, comprises
Logic and circuit, logic with in conjunction with by each testing signal for the described open circuit surge voltage testing circuit output of the electromagnetic coil of the different group of described public switch element,
Described microprocessor is judged according to the output of described logic and circuit unusually.
5. the fault-detecting circuit of fuel injection system as claimed in claim 1 is characterized in that,
Described each public switch element is corresponding to moving from the quick overexcitation control signal of described microprocessor and the light current retentive control signal that is used to keep described electromagnetic coil to move.
6. the fault-detecting circuit of fuel injection system as claimed in claim 1 is characterized in that, comprises
The overexcitation booster circuit that supply voltage is boosted,
Described public switch element, form by high side switch element and low voltage terminal switching element, the high side switch element carries out feed by described overexcitation booster circuit to described potential winding and drives, the low voltage terminal switching element keeps the light current retentive control signal of described electromagnetic coil action to move corresponding to being used to, and drives described electromagnetic coil is carried out feed.
7. the fault-detecting circuit of fuel injection system as claimed in claim 6 is characterized in that,
Described each high side switch element share described overexcitation booster circuit, and described overexcitation is public with booster circuit to all electromagnetic coils.
8. the fault-detecting circuit of fuel injection system as claimed in claim 1 is characterized in that, comprises
Be judged to be when unusual according to the testing signal that produces from described open circuit surge testing circuit by described microprocessor, one group of shut-off means of switching on that described public switch element and the independent switch element that be connected in series with this public switch element are cut off,
Utilization is preserved running with the group electromagnetic coil in addition that described independent switch element cuts off.
9. the fault-detecting circuit of fuel injection system as claimed in claim 8 is characterized in that,
Described microprocessor is falling to being judged to be according to lacking of described open circuit surge voltage when unusual, if there have have the current"on"time of electromagnetic coil successively to be overlapping, then to shortening current"on"time of described drive signal impulse row processing.
10. the fault-detecting circuit of fuel injection system as claimed in claim 1 is characterized in that, comprises
Anomaly alarming device receives abnormal signal and reports to the police to unusual,
Described microprocessor is being judged to be according to the testing signal that is sent by described open circuit surge voltage testing circuit when unusual, to described anomaly alarming device output abnormality signal.
11. the fault-detecting circuit of fuel injection system as claimed in claim 1 is characterized in that,
Described microprocessor has the interface circuit that is connected usefulness with external tool.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001213738A JP3699370B2 (en) | 2001-07-13 | 2001-07-13 | Failure detection circuit for fuel injection device |
| JP2001213738 | 2001-07-13 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1397723A true CN1397723A (en) | 2003-02-19 |
| CN1292160C CN1292160C (en) | 2006-12-27 |
Family
ID=19048670
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02126425 Expired - Fee Related CN1292160C (en) | 2001-07-13 | 2002-07-11 | Fault detecting circuit of fuel injection device |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP3699370B2 (en) |
| CN (1) | CN1292160C (en) |
| DE (1) | DE10200847B4 (en) |
| GB (1) | GB2377507B (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101166896B (en) * | 2005-04-28 | 2011-01-26 | 瓦特西拉芬兰有限公司 | A control system of a fuel injection apparatus of an internal combustion engine |
| CN102182603A (en) * | 2011-05-24 | 2011-09-14 | 浙江大学 | Fault diagnosis device and method for high-pressure common-rail fuel injection system |
| CN104343561A (en) * | 2013-08-07 | 2015-02-11 | 本田技研工业株式会社 | Fuel pump control device |
| CN104662275A (en) * | 2012-09-26 | 2015-05-27 | 德尔福国际运营卢森堡有限公司 | Diagnostic circuit of a fluid injector and method for diagnosing a fault |
| CN104727962A (en) * | 2013-12-19 | 2015-06-24 | 现代自动车株式会社 | Injector driver and method of controlling the same |
| CN106460703A (en) * | 2014-05-13 | 2017-02-22 | 日立汽车***株式会社 | Fuel injection system for internal combustion engine |
| CN107710354A (en) * | 2015-07-08 | 2018-02-16 | 爱信艾达株式会社 | Drive device |
| CN109595088A (en) * | 2017-10-02 | 2019-04-09 | 通用汽车环球科技运作有限责任公司 | Fuel injection system and method for vehicle propulsion system |
| CN110445395A (en) * | 2019-08-13 | 2019-11-12 | 苏州格远电气有限公司 | Wide-voltage range direct current input switch power supply |
| CN112350550A (en) * | 2019-08-08 | 2021-02-09 | 株式会社电装 | Switch drive circuit and switch drive device |
| CN114109633A (en) * | 2017-08-01 | 2022-03-01 | 康明斯有限公司 | Control logic circuit for connecting multiple high-side loads to common return pin |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4470774B2 (en) * | 2005-03-18 | 2010-06-02 | トヨタ自動車株式会社 | Control device for internal combustion engine |
| KR101498809B1 (en) * | 2012-09-05 | 2015-03-04 | 나부테스코 가부시키가이샤 | Driving circuit for electromagnetic valve |
| JP5821907B2 (en) | 2013-06-28 | 2015-11-24 | 株式会社デンソー | Fuel injection valve control device |
| JP6183341B2 (en) * | 2014-12-03 | 2017-08-23 | 株式会社デンソー | Injector drive device |
| CN105042159A (en) * | 2015-07-24 | 2015-11-11 | 苏州市大力电器有限公司 | Electromagnetic valve drive device with fault diagnosis function and self-protection function |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0792016B2 (en) * | 1986-06-09 | 1995-10-09 | 三菱電機株式会社 | Failure detection circuit for fuel injection valve drive circuit for internal combustion engine |
| IT1261580B (en) * | 1993-09-07 | 1996-05-23 | Fiat Ricerche | INJECTOR FAULT DIAGNOSIS METHOD OF HIGH PRESSURE INJECTION SYSTEMS FOR INTERNAL COMBUSTION ENGINES |
| JP3541524B2 (en) * | 1995-10-12 | 2004-07-14 | 株式会社デンソー | Solenoid valve drive |
| JP3694950B2 (en) * | 1996-01-09 | 2005-09-14 | 日産自動車株式会社 | Fuel injection valve drive circuit for multi-cylinder direct injection engines |
| JP3878261B2 (en) * | 1996-11-26 | 2007-02-07 | 富士通テン株式会社 | Failure determination device, flow rate control device, and fuel injection device for internal combustion engine |
| JPH10257799A (en) * | 1997-03-07 | 1998-09-25 | Toyota Motor Corp | Output open-circuiting detection device of multichannel output device |
| JP3828239B2 (en) * | 1997-05-22 | 2006-10-04 | 三菱電機株式会社 | Control device for injector for fuel injection |
| JP3916867B2 (en) * | 2000-12-14 | 2007-05-23 | 三菱電機株式会社 | In-vehicle electric load drive system abnormality detection device |
-
2001
- 2001-07-13 JP JP2001213738A patent/JP3699370B2/en not_active Expired - Fee Related
-
2002
- 2002-01-11 DE DE10200847A patent/DE10200847B4/en not_active Expired - Fee Related
- 2002-01-15 GB GB0200830A patent/GB2377507B/en not_active Expired - Fee Related
- 2002-07-11 CN CN 02126425 patent/CN1292160C/en not_active Expired - Fee Related
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101166896B (en) * | 2005-04-28 | 2011-01-26 | 瓦特西拉芬兰有限公司 | A control system of a fuel injection apparatus of an internal combustion engine |
| CN102182603A (en) * | 2011-05-24 | 2011-09-14 | 浙江大学 | Fault diagnosis device and method for high-pressure common-rail fuel injection system |
| CN104662275A (en) * | 2012-09-26 | 2015-05-27 | 德尔福国际运营卢森堡有限公司 | Diagnostic circuit of a fluid injector and method for diagnosing a fault |
| CN104662275B (en) * | 2012-09-26 | 2017-04-12 | 德尔福国际运营卢森堡有限公司 | Diagnostic circuit of a fluid injector and method for diagnosing a fault |
| CN104343561A (en) * | 2013-08-07 | 2015-02-11 | 本田技研工业株式会社 | Fuel pump control device |
| CN104727962A (en) * | 2013-12-19 | 2015-06-24 | 现代自动车株式会社 | Injector driver and method of controlling the same |
| CN104727962B (en) * | 2013-12-19 | 2019-07-05 | 现代自动车株式会社 | Injector driver and its control method |
| CN106460703B (en) * | 2014-05-13 | 2019-06-07 | 日立汽车***株式会社 | The fuel injection device of internal combustion engine |
| CN106460703A (en) * | 2014-05-13 | 2017-02-22 | 日立汽车***株式会社 | Fuel injection system for internal combustion engine |
| CN107710354B (en) * | 2015-07-08 | 2019-12-06 | 爱信艾达株式会社 | Drive device |
| CN107710354A (en) * | 2015-07-08 | 2018-02-16 | 爱信艾达株式会社 | Drive device |
| CN114109633A (en) * | 2017-08-01 | 2022-03-01 | 康明斯有限公司 | Control logic circuit for connecting multiple high-side loads to common return pin |
| CN114109633B (en) * | 2017-08-01 | 2024-05-17 | 康明斯有限公司 | Control logic circuit for connecting multiple high-side loads with common return pin |
| CN109595088A (en) * | 2017-10-02 | 2019-04-09 | 通用汽车环球科技运作有限责任公司 | Fuel injection system and method for vehicle propulsion system |
| CN112350550A (en) * | 2019-08-08 | 2021-02-09 | 株式会社电装 | Switch drive circuit and switch drive device |
| CN112350550B (en) * | 2019-08-08 | 2023-08-11 | 株式会社电装 | Switch driving circuit and switch driving device |
| CN110445395A (en) * | 2019-08-13 | 2019-11-12 | 苏州格远电气有限公司 | Wide-voltage range direct current input switch power supply |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1292160C (en) | 2006-12-27 |
| GB2377507A (en) | 2003-01-15 |
| GB2377507B (en) | 2003-07-23 |
| JP3699370B2 (en) | 2005-09-28 |
| DE10200847B4 (en) | 2010-09-23 |
| GB0200830D0 (en) | 2002-03-06 |
| JP2003027993A (en) | 2003-01-29 |
| DE10200847A1 (en) | 2003-01-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1292160C (en) | Fault detecting circuit of fuel injection device | |
| US8081498B2 (en) | Internal combustion engine controller | |
| CN1240936C (en) | Controller of vehicular engine | |
| US8649151B2 (en) | Injector drive circuit | |
| EP2236797B1 (en) | Internal combustion engine controller | |
| CN100399671C (en) | Method and apparatus for controlling power generation using gradually exciting technique | |
| CN103857144B (en) | The interchange of dark space can be avoided to drive illuminator and driving method thereof | |
| CN101418738B (en) | Control unit for internal combustion engine | |
| CN1056668C (en) | Electric system and method of fuel system with high-pressure gas container | |
| CN101230808A (en) | Internal combustion engine controller | |
| CN1987081B (en) | Fuel injection device for internal combustion engine | |
| CN1918778A (en) | Voltage generator device, motor vehicle, control method for the voltage generator device, control method for the motor vehicle, and computer-readable recording medium storing program for causing compu | |
| US8978625B2 (en) | Internal combustion engine controller | |
| CN105811823B (en) | Power control unit | |
| CN1265197A (en) | Electrical tester for small motor vehicles | |
| CN104564341A (en) | Spark plug fouling detection for ignition system | |
| US9423437B2 (en) | Arrangement for identifying a switching position of a switch on an internal combustion engine in a handheld work apparatus | |
| JP2017036694A (en) | Ignition device | |
| CN105736162B (en) | common rail diesel engine fuel injection control system | |
| CN111051686B (en) | Ignition device | |
| CN1759528A (en) | Power supply for vehicle | |
| JP2005185089A (en) | System for starting engine of electric driving machine | |
| CN102107697A (en) | Wide-voltage electric vehicle anti-theft apparatus with short-circuit protection and working method | |
| JP2006087163A (en) | Power generation controller for vehicle | |
| CN106374549A (en) | Charging system for automobile battery, charging method for automobile battery and automobile |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20061227 Termination date: 20160711 |