CN100585151C - Internal combustion engine misfire judging device and misfire judging method - Google Patents
Internal combustion engine misfire judging device and misfire judging method Download PDFInfo
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- CN100585151C CN100585151C CN200680005544A CN200680005544A CN100585151C CN 100585151 C CN100585151 C CN 100585151C CN 200680005544 A CN200680005544 A CN 200680005544A CN 200680005544 A CN200680005544 A CN 200680005544A CN 100585151 C CN100585151 C CN 100585151C
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- 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
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/62—Hybrid vehicles
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Abstract
When a rotation variation difference Nxd360 that is the difference from a rotation variation Nxd before a crank angle 360CA exceeds a judgment value A1 and a rotation variation difference Nxd720 that is the difference from a rotation variation Nxd before a crank angle 720CA exceeds a judgment value B1 (S150, S160), and when judgments (S200) by rotation variation difference ratios Nja2, Nja3, Nja4 by the rotation variation difference Nxd360 and judgments (S210) by rotation variation difference ratios Njb2, Njb3, Njb4 by the rotation variation difference Nxd720 both hold true, a misfire is judged. Accordingly, an engine ignition timing is significantly retarded in angle to more properly and accurately judge a misfire that may occur while a catalyst in an exhaust emission control device is being warmed up.
Description
Technical field
The present invention relates to (the misfire that catches fire of internal-combustion engine, misfire) decision maker and misfire determining method, in detail, relate to the judging misfire of the internal-combustion engine that catching fire in the multi-cylinder internal-combustion engine that can change firing time judged and the misfire determining method of such internal-combustion engine.
Background technique
In the past, misfire determining method as this internal-combustion engine, a kind of like this method has been proposed: when the catalyzer that purification plant had to the exhaust of cleaning internal combustion engines carries out preheating, use the low judgement level of judgement level when common to judge catch fire (for example, with reference to patent documentation 1).In this device, during catalyst warm-up, be judged to be to produce during at the mean speed variable quantity of internal-combustion engine and catch fire greater than the low judgement level of the judgement level when common, the flase drop that suppresses thus to catch fire is surveyed.
Patent documentation 1: the spy opens the 2002-4936 communique
Summary of the invention
But, in the judging misfire of above-mentioned internal-combustion engine, in the catalyst warm-up process, use lower judgement level to judge and catch fire, can not detect the situation of catching fire so can produce.Particularly under the situation that is loaded in the internal-combustion engine on the hybrid vehicle that can travel by motor, the operation of internal-combustion engine can be that carry out at the center with the catalyst warm-up, so can produce the situation about postponing significantly firing time that makes.At this moment, the burning of internal-combustion engine becomes slowly, catches fire so the reduction of judgement level can not correctly be judged.
One of the judging misfire of internal-combustion engine of the present invention and purpose of misfire determining method are more correctly to judge that preheating finishes catching fire of preceding internal-combustion engine.In addition, one of the judging misfire of internal-combustion engine of the present invention and purpose of misfire determining method are, even for the catalyzer that Exhaust gas purifying device had is carried out preheating during making internal combustion engine operation, also can judge catching fire of internal-combustion engine accurately, wherein said Exhaust gas purifying device is used for the exhaust of cleaning internal combustion engines.
Technological scheme below at least a portion to achieve the above object, the judging misfire of internal-combustion engine of the present invention and misfire determining method have adopted.
The judging misfire of internal-combustion engine of the present invention is the judging misfire of internal-combustion engine that catching fire in the multi-cylinder internal-combustion engine that can change firing time judged, comprising: the pivotal position detection unit, and it detects the pivotal position of the bent axle of described internal-combustion engine; Rotate to change arithmetic element, it is based on described detected pivotal position, successively the firing time of each cylinder of computing and described internal-combustion engine corresponding crank shaft angle place the rotation variation of described internal-combustion engine; Rotate the difference in change arithmetic element, its computing the 1st is rotated difference in change and the 2nd and is rotated difference in change, the wherein said the 1st rotate difference in change be the described rotation that generates successively change with this rotations change compare crank shaft angle be the rotation that generates before the 1st angle time change poor, the described the 2nd to rotate difference in change be that the described rotation that generates successively changes with changing with this rotations and compares the poor of rotation variation that crank shaft angle generates before the time for the 2nd angle different with described the 1st angle; The misfire determining unit, it the described the 1st rotated difference in change and the described the 2nd and rotates difference in change and judge catching fire of described internal-combustion engine based on what calculated by described rotation difference in change arithmetic element before beginning from described engine starting to set up to predetermined condition.
In the judging misfire of internal-combustion engine of the present invention, pivotal position based on the bent axle of internal-combustion engine, successively the firing time of each cylinder of computing and internal-combustion engine corresponding crank shaft angle place the rotation of internal-combustion engine change, union the 1st rotates difference in change and the 2nd and rotates difference in change, wherein the 1st rotate difference in change and change for this rotation that generates successively and change with this rotations that to compare crank shaft angle be the poor of the rotation variation that generates before the 1st angle time, the 2nd rotates difference in change compares the poor of rotation variation that crank shaft angle generates for time before the 2nd angle different with the 1st angle for the rotation that generates successively changes with changing with this rotations, before beginning from engine starting to set up, the 1st rotate difference in change and the 2nd and rotate difference in change and judge catching fire of internal-combustion engine based on what calculate to predetermined condition.That is, use the preceding rotation difference in change of different angles to judge catching fire of internal-combustion engine.Its result can more correctly judge from engine starting to begin to set up catching fire of internal-combustion engine before to predetermined condition.Here, if " predetermined condition establishment " being made as the preheating of the catalyzer that Exhaust gas purifying device had of internal-combustion engine finishes, even then for catalyzer that the preheating Exhaust gas purifying device had and make internal combustion engine operation during, also can more correctly judge catching fire of internal-combustion engine accurately.In addition, if " internal-combustion engine " is made as the catalyzer that is had for preheating Exhaust gas purifying device when starting and makes the internal-combustion engine that lingeringly moves firing time, even then, also can more correctly judge catching fire of internal-combustion engine accurately for catalyzer that the preheating Exhaust gas purifying device had and lingeringly made between its on-stream period the firing time of internal-combustion engine.
In the judging misfire of such internal-combustion engine of the present invention, also can be made as, described misfire determining unit is to rotate the described the 1st to judge the unit that catches fire when difference in change is rotated difference in change more than or equal to the 2nd predetermined value different with described the 1st predetermined value more than or equal to the 1st predetermined value and the described the 2nd.At this moment, also described the 1st predetermined value can be set at than the little value of described the 2nd predetermined value.
Rotate difference in change more than or equal to the 1st predetermined value the 1st, and the 2nd judges when rotating difference in change more than or equal to the 2nd predetermined value in the judging misfire of internal-combustion engine of the present invention of the mode of catching fire, also can be made as, described misfire determining unit is to be judged to be the unit that catches fire following the time: promptly, the 1st object rotates difference in change and rotates ratio of difference in change another the 1st rotation difference in change in addition in the 1st catches fire with the predetermined ratio scope with the 1st object, and the 2nd object rotate difference in change and the 2nd object rotate beyond the difference in change another the 2nd ratio that rotates difference in change with the described the 1st catch fire with the predetermined ratio scope the different the 2nd catch fire use in the predetermined ratio scope in, it is the rotation difference in change of described the 1st rotation difference in change more than or equal to described the 1st predetermined value that wherein said the 1st object rotates difference in change, and it is the rotation difference in change of described the 2nd rotation difference in change more than or equal to described the 2nd predetermined value that described the 2nd object rotates difference in change.At this moment, also can be made as described other the 1st rotate difference in change and comprise: rotate the 1st the rotating difference in change, rotate the 1st the rotating difference in change and rotate the 1st any one of rotating in the difference in change that difference in change is next the 1st cylinder of the 1st cylinder that difference in change is the front of the 3rd cylinder that difference in change is the front with respect to described the 1st object with respect to described the 1st object with respect to described the 1st object; Described other the 2nd rotate difference in change and comprise: rotate the 2nd the rotating difference in change, rotate the 2nd the rotating difference in change and rotate the 2nd any one of rotating in the difference in change that difference in change is next the 1st cylinder of the 1st cylinder that difference in change is the front of the 3rd cylinder that difference in change is the front with respect to described the 2nd object with respect to described the 2nd object with respect to described the 2nd object.So, can more correctly judge catching fire of internal-combustion engine accurately.
In addition, rotate in the judging misfire of the internal-combustion engine of the present invention of judging the mode of catching fire when difference in change is rotated difference in change more than or equal to the 2nd predetermined value more than or equal to the 1st predetermined value and the 2nd the 1st, also can be made as, described misfire determining unit is to rotate difference in change when rotating difference in change more than or equal to 2nd predetermined value different with described the 1st predetermined value more than or equal to the 1st predetermined value and the described the 2nd the described the 1st, and first rotates and change and second rotate the difference that changes and rotate difference in change promptly less than judging the unit that catches fire in the middle of predetermined during predetermined value; Wherein, described first rotates variation is, compares with corresponding crank shaft angle, and the rotation at the crank shaft angle place before the angle suitable with the phase place of described a plurality of cylinders is the phase angle changes; Described second rotates variation is, compare with this corresponding crank shaft angle, the rotation at the crank shaft angle place before the angle that draws after being multiplied each other at least one numerical value and phase angle changes, wherein, described at least one numerical value is at least one smaller or equal to the number that deducts numerical value 2 gained from the number of described a plurality of cylinders.So, can more correctly judge catching fire of internal-combustion engine.At this moment, can also be made as, described misfire determining unit is rotate to change described first that the 3rd to rotate the difference that changes be to rotate difference in change in the middle of each all to judge the unit that catches fire less than described during predetermined value in the middle of predetermined with each; Wherein, the described the 3rd rotates the rotation variation that variation is following angle each crank shaft angle place before, and this angle is the angle after will multiplying each other smaller or equal to each numerical value of the number that deducts numerical value 2 gained from the number of described a plurality of cylinders, with the phase angle.So, can more correctly judge catching fire of internal-combustion engine.
In the judging misfire of internal-combustion engine of the present invention, also can be made as, described the 1st angle is 360 degree, described the 2nd angle is 720 degree.In addition, the 1st angle, the 2nd angle are not limited to 360 degree, 720 degree, also can use other angle.
In the judging misfire of internal-combustion engine of the present invention, also can be made as, described rotation change arithmetic element be the described internal-combustion engine of computing bent axle each predetermined crank angle rotational angular velocity and come computing to rotate the unit of variation based on corresponding rotational angular velocity firing time with the difference of rotational angular velocity before the described predetermined crank angle of this rotational angular velocity with each cylinder of this internal-combustion engine.In addition, also can be made as, it is that corresponding rotational angle acceleration firing time with each cylinder of described internal-combustion engine is changed the unit that carries out computing as described rotation that described rotation changes arithmetic element.
In the judging misfire of internal-combustion engine of the present invention, also can be made as, described internal-combustion engine is mounted on the hybrid vehicle, set the operating point of this internal-combustion engine independently and the internal-combustion engine that moves with respect to travelling state.
The misfire determining method of internal-combustion engine of the present invention is the misfire determining method of internal-combustion engine that catching fire in the multi-cylinder internal-combustion engine that can change firing time judged, wherein: based on the pivotal position of the bent axle of described internal-combustion engine, successively the firing time of each cylinder of computing and described internal-combustion engine corresponding crank shaft angle place the rotation of described internal-combustion engine change; Computing the 1st is rotated difference in change and the 2nd and is rotated difference in change, the wherein said the 1st rotate difference in change be the described rotation that generates successively change with this rotations change compare crank shaft angle be the rotation that generates before the 1st angle time change poor, the described the 2nd to rotate difference in change be that the described rotation that generates successively changes with changing with this rotations and compares the poor of rotation variation that crank shaft angle generates before the time for the 2nd angle different with described the 1st angle; Before beginning from described engine starting to set up, based on by described the described the 1st rotating difference in change and the described the 2nd and rotate difference in change and judge catching fire of described internal-combustion engine of calculating to predetermined condition.
In the misfire determining method of internal-combustion engine of the present invention, based on the pivotal position of the bent axle of internal-combustion engine, successively the firing time of each cylinder of computing and internal-combustion engine corresponding crank shaft angle place the rotation of internal-combustion engine change; Computing the 1st is rotated difference in change and the 2nd and is rotated difference in change, the wherein said the 1st rotate difference in change for this rotation that generates successively change with this rotations change compare crank shaft angle be the rotation that generates before the 1st angle time change poor, the described the 2nd rotates difference in change compares the poor of rotation variation that crank shaft angle generates before the time for the 2nd angle different with the 1st angle for the rotation that generates successively changes with changing with this rotations; Before beginning from engine starting to set up, based on the 1st rotating difference in change and the 2nd and rotate difference in change and judge catching fire of internal-combustion engine by what calculate to predetermined condition.That is, use the preceding rotation difference in change of different angles to judge catching fire of internal-combustion engine.Its result can more correctly judge from engine starting to begin to set up catching fire of internal-combustion engine before to predetermined condition.Here, if " predetermined condition establishment " being made as the preheating of the catalyzer that Exhaust gas purifying device had of internal-combustion engine finishes, even then for catalyzer that the preheating Exhaust gas purifying device had and during making internal combustion engine operation, also can more correctly judge catching fire of internal-combustion engine accurately.In addition, if " internal-combustion engine " is made as the catalyzer that is had for preheating Exhaust gas purifying device when starting and makes the internal-combustion engine that firing time, delay moved (hysteresis), even then, also can more correctly judge catching fire of internal-combustion engine accurately for catalyzer that the preheating Exhaust gas purifying device had and lingeringly made between its on-stream period the firing time of internal-combustion engine.
In the misfire determining method of such internal-combustion engine of the present invention, also can be made as, described step (c) is to use the preheating of the catalyzer that Exhaust gas purifying device had of described internal-combustion engine to finish this condition to judge the step of catching fire as described predetermined condition.At this moment, also can be made as, described the 1st predetermined value is set to than the little value of described the 2nd predetermined value.
Description of drawings
Fig. 1 is the general structural drawing of the structure of expression hybrid vehicle 20, and wherein said hybrid vehicle is mounted with the judging misfire as the internal-combustion engine of one embodiment of the present of invention;
Fig. 2 is that the motor that works as the judging misfire of internal-combustion engine of expression is with electronic control unit 24 with by the general structural drawing of this motor with the structure of the motor 22 of electronic control unit 24 operation controls;
The flow chart of the example that misfire determining is handled during Fig. 3 preheating that to be expression carried out with electronic control unit 24 by motor;
Fig. 4 is the explanatory drawing that expression produces the example that the time of the rotation difference in change Nxd360 when catching fire changes;
Fig. 5 is the explanatory drawing that expression produces the example that the time of the rotation difference in change Nxd720 when catching fire changes;
The flow chart of the example that misfire determining is handled during Fig. 6 preheating that to be expression carried out with electronic control unit 24 by the motor of the 2nd mode of execution;
Fig. 7 is the explanatory drawing that expression produces the example that the time of the rotation difference in change Nxd (n) when catching fire changes.
Embodiment
Next, use embodiment to describe to implementing best mode of the present invention.Fig. 1 is the general structural drawing of the structure of expression hybrid vehicle 20, and wherein said hybrid vehicle is mounted with the judging misfire as the internal-combustion engine of one embodiment of the present of invention.Fig. 2 is that the motor that works as the judging misfire of internal-combustion engine of expression is with electronic control unit 24 with by the general structural drawing of this motor with the structure of the motor 22 of electronic control unit 24 operation controls.Embodiment's hybrid vehicle 20 comprises as shown in Figure 1: motor 22, and it is controlled with electronic control unit (abbreviating Engine ECU in Fig. 1 as) 24 operations by motor; Planetary gears 30, wherein planet carrier is connected with bent axle 26 as the output shaft of motor 22, and gear ring is connected with live axle on the axletree that is attached at driving wheel 69a, 69b simultaneously; The motor M G1 that can generate electricity, it is connected on the sun gear of planetary gears 30, accepts the operation control of motor with electronic control unit (abbreviating motor ECU in Fig. 1 as) 40 through inverter 41; Motor M G2 that can input output power, it is installed on the live axle on the axletree that is attached at driving wheel 69a, 69b, accepts the operation control of motor with electronic control unit 40 through inverter 42; Battery 50, it can carry out the exchange of electric power through inverter 41,42 and motor M G1, MG2; With mixed power electronic control unit 70, its control hybrid vehicle 20 integral body.This mixed power is made of the microprocessor that with CPU72 is the center with electronic control unit 70, except that CPU72, also comprises the ROM74 that stores processor, the RAM76 of temporary transient storage data and not shown input/output port and COM1.Through input port to mixed power with input in the electronic control unit 70: from the shift position SP of the shift position sensor 82 of the operating position that detects speed change lever 81, accelerator opening Acc from the accelerator pedal position sensor 84 of the depression amount that detects accelerator pedal 83, from the brake pedal position BP of the brake pedal position sensor 86 of the depression amount that detects brake petal 85 with from the vehicle velocity V of vehicle speed sensor 88 etc.As mentioned above, mixed power links together with electronic control unit 40 etc. with electronic control unit 24, motor through COM1 and motor with electronic control unit 70, carries out the exchange of various control signals, data with electronic control unit 40 etc. with electronic control unit 24, motor with motor.
The motor of control motor 22 is made of the microprocessor that with CPU24a is the center with electronic control unit 24, also comprises storing the ROM24b that handles routine, the RAM24c of temporary transient storage data and not shown flash memory (flash memory), input/output port and COM1 except that CPU24a.Through not shown input port, to the motor signal of electronic control unit 24 inputs from the various sensors of the state of detection of engine 22.For example, import with electronic control unit ECU24 to motor via input port: the crank shaft angle CA of the crankshaft angle sensor 140 that the crank shaft angle CA as the rotational angle of bent axle 26 is detected; Coolant water temperature Tw from the cooling-water temperature sensor 142 of the temperature of the cooling water of detection of engine 22; From the cam position of the cam-position sensor 144 of the rotational position that detects camshaft, described camshaft opens and closes the intake valve 128 from air intake-exhaust to the firing chamber and the exhaust valve that carry out; Throttle position from the throttle position sensor 146 of the position of detecting closure 124; From the suction air amount G a of detection as the vacuum transducer 148 of the suction air quantity of the load of motor 22; Air fuel ratio AF from the air-fuel ratio sensor 135a of the upstream side that is installed in purification plant 134; From oxygen signal of the oxygen sensor 135b in the downstream side that is installed in purification plant 134 etc.Here, crankshaft angle sensor 140 constitute be installed in bent axle 26 on not shown magnet rotor (magnet rotor) relative to the position on disposed the MRE turn-sensitive device of magnetoresistive element, each predetermined angle (for example 10 ° of CA of crank shaft angle) output pulsatile once.In an embodiment, crank shaft angle CA is specified in the pulse that utilizes this crankshaft angle sensor 140 to produce, and the rotational speed N of calculation engine 22.In addition, from motor electronic control unit ECU24, be used to drive the various control signals of motor 22 via not shown output port output.For example, export via output port from Engine ECU 24: the drive signal of giving Fuelinjection nozzle 126, give the drive signal of the throttle motor 136 of the position of regulating closure 124, give the control signal with the incorporate spark coil 138 of igniter, give the control signal of the switching changeable air valve timing mechanism 150 regularly that can change intake valve 128 etc.As mentioned above, motor electronic control unit 24, communicate with electronic control unit 70 with mixed power,, export the data relevant simultaneously as required with the running state of motor 22 by moving control motor 22 with the control signal of electronic control unit 70 from mixed power.
Next, for the action of the embodiment's of such formation hybrid vehicle 20, thereby particularly the action during the catalyzer that makes motor 22 starting preheating purification plants 134, when judging catching fire of motor 22 by motor with electronic control unit 24 describes.The flow chart of the example that misfire determining is handled during Fig. 3 preheating that to be expression carried out with electronic control unit 24 by motor.In addition, in an embodiment, although also can be according to the residual capacity (SOC of battery 50, charged state), driver's driving requirement, but travel (motor driving) owing to can carry out motor by the power from motor M G2, so the motor 22 after the starting just makes its firing time of operation lingeringly significantly for the catalyst warm-up that promotes purification plant 134.
When misfire determining was handled when carrying out preheating, motor was at first imported the necessary data of judgement (step S100) of catching fire from the crank shaft angle CA of crankshaft angle sensor 140 etc. with the CPU24a of electronic control unit 24; Calculate the rotational speed N (step S110) of the bent axle 26 of 60 ° of CA of every crank shaft angle based on the crank shaft angle CA that is imported.The rotational speed N of 60 ° of CA of this every crank shaft angle can by with 10 ° of CA of crank shaft angle before pulse every the interval try to achieve.Then, poor as the rotational speed N of 60 ° of CA of every crank shaft angle, the rotation of calculating 120 ° of CA of every crank shaft angle with the ignition timing of each cylinder of motor 22 accordingly changes Nxd (step S120); Change Nxd for the rotation of being calculated, the rotation before calculating and 360 ° of CA of crank shaft angle changes the difference conduct rotation difference in change Nxd360 (step S130) of Nxd; And the rotation before calculating rotation variation Nxd and 720 ° of CA of crank shaft angle changes the poor conduct rotation difference in change Nxd720 (step S140) of Nxd.Here, as mentioned above, rotating variation Nxd calculates by 120 ° of CA of every crank shaft angle, so the variation of the rotation before 360 ° of CA of crank shaft angle Nxd is exactly the rotation variation before 120 ° of CA of 3 crank shaft angle, it is exactly that the preceding rotation of 120 ° of CA of 6 crank shaft angle changes that the rotation before 720 ° of CA of crank shaft angle changes Nxd.In the flow chart in the drawings,, be expressed as and rotate variation Nxd (n), Nxd (n-3), Nxd (n-6) in order to represent this situation.
After calculating rotation difference in change Nxd360, Nxd720 like this, the rotation difference in change Nxd360 that calculates and 360 degree are compared (step S150) with the 1st misfire determining value A1, open the rotation difference in change Nxd720 and 720 that to calculate and spend with the 1st misfire determining value B1 compare (step S160).Here, 360 degree are determined according to testing etc. with the 1st misfire determining value B1 with the 1st misfire determining value A1 and 720 degree, during thereby postpone significantly to make the catalyst warm-up of purification plant 134 firing time that makes motor 22, the corresponding rotation difference in change of ignition timing Nxd360, the Nxd720 of the cylinder that catches fire when catching fire with generation are made as less value separately, and with respect to being made as bigger value separately with the corresponding rotation difference in change of the ignition timing that does not produce the cylinder that catches fire Nxd360, Nxd720.In embodiment's motor 22,360 degree are set at than 720 with the 1st misfire determining value A1 spend with the slightly little value of the 1st misfire determining value B1.When rotation difference in change Nxd360 spends with 1st misfire determining value B1 with the 1st misfire determining value A1 or rotation difference in change Nxd720 smaller or equal to 720 smaller or equal to 360 degree, be judged to be not generation and catch fire end process.
Rotate difference in change Nxd720 simultaneously when spending with the 1st misfire determining value B1 greater than 360 degree with the 1st misfire determining value A1 rotating difference in change Nxd360 greater than 720, will with greater than 360 degree with the 1st misfire determining value A1,720 spend the rotation difference in change Nxd360 with the 1st misfire determining value B1, the corresponding cylinder of Nxd720 is judged to be the 3rd cylinder (step S170) that catches fire of ignition order, and calculate with this cylinder that catches fire before the absolute value of the 3rd the corresponding rotation difference in change of cylinder Nxd360 (0) compare Nja2 divided by the value of rotation difference in change Nxd360 (3) gained of the cylinder that catches fire as the rotation difference in change, calculate with the value of the cylinder corresponding rotation difference in change of first cylinder Nxd360 (2) before of catching fire and compare Nja3 as rotating difference in change divided by rotation difference in change Nxd360 (3) gained of the cylinder that catches fire, calculate with the cylinder that catches fire after the corresponding rotation difference in change of first cylinder Nxd360 (4) divided by the value of rotation difference in change Nxd360 (3) gained of the cylinder that catches fire as rotating difference in change than Nja4 (step S180), and calculate with the cylinder that catches fire before the 3rd the corresponding rotation difference in change of cylinder Nxd720 (0) compare Njb2 divided by the value of rotation difference in change Nxd720 (3) gained of the cylinder that catches fire as the rotation difference in change, calculate with the cylinder that catches fire before the corresponding rotation difference in change of first cylinder Nxd720 (2) divided by the value of rotation difference in change Nxd720 (3) gained of the cylinder that catches fire as rotating difference in change than Njb3, calculate with the cylinder that catches fire after the corresponding rotation difference in change of first cylinder Nxd720 (4) divided by the value of rotation difference in change Nxd720 (3) gained of the cylinder that catches fire as rotating difference in change than Njb4 (step S190).
Next, judge whether the rotation difference in change that is calculated is positioned at 360 than Nja2 and spends with the 2nd misfire determining value A21, in the scope of A22, whether the rotation difference in change that is calculated is positioned at 360 than Nja3 is spent with the 3rd misfire determining value A31, in the scope of A32, whether the rotation difference in change that is calculated is positioned at 360 than Nja4 is spent with the 4th misfire determining value A41, in the scope of A42 (step S200), and judge whether the rotation difference in change that is calculated is positioned at 720 than Njb2 and spends with the 2nd misfire determining value B21, in the scope of B22, whether the rotation difference in change that is calculated is positioned at 720 than Njb3 is spent with the 3rd misfire determining value B31, in the scope of B32, whether the rotation difference in change that is calculated is positioned at 720 than Njb4 is spent with the 4th misfire determining value B41, in the scope of B42 (step S210).Here, 360 degree are root a tree name experiment etc. and determine with the 3rd misfire determining value A31, A32,360 degree with the 4th misfire determining value A41, A42 with the 2nd misfire determining value A21, A22,360 degree, thus become respectively than produce during the catalyst warm-up that postpones to make purification plant 134 in the firing time that makes motor 22 significantly when catching fire the rotation difference in change than Nja2, rotation difference in change than Nja3, rotation difference in change than the little value of Nja4 and than this rotation difference in change than Nja2, rotation difference in change than Nja3, the rotation difference in change value bigger than Nja4; 720 degree determine according to experiment etc. with the 4th misfire determining value B41, B42 with the 3rd misfire determining value B31, B32,720 degree with the 2nd misfire determining value B21, B22,720 degree, thus become respectively than produce during the catalyst warm-up that postpones to make purification plant 134 in the firing time that makes motor 22 significantly when catching fire the rotation difference in change than Njb2, rotation difference in change than Njb3, rotation difference in change than the little value of Njb4 and than this rotation difference in change than Njb2, rotation difference in change than Njb3, the rotation difference in change value bigger than Njb4.Be positioned at each 360 degree with the scope of the 2nd misfire determining value A21, A22,360 degree scope, 360 scopes of spending with the 4th misfire determining value A41, A42 than Nja2, Nja3, Nja4 rotating difference in change with the 3rd misfire determining value A31, A32, and rotate difference in change when being positioned at each 720 degree and spending scope with the 4th misfire determining value B41, B42 with the scope, 720 of the 3rd misfire determining value B31, B32 with the scope of the 2nd misfire determining value B21, B22,720 degree than Njb2, Njb3, Njb4, be output as and produced catch fire (step S220), end process.On the other hand, compare Nja2 in the rotation difference in change, Nja3, among the Nja4 any one do not spent with the 2nd misfire determining value A21 corresponding 360, in the scope of A22,360 spend with the 3rd misfire determining value A31, in the scope of A32,360 spend with the 4th misfire determining value A41, in the time of in the scope of A42, perhaps rotate difference in change and compare Njb2, Njb3, among the Njb4 any one do not spent with the 2nd misfire determining value B21 corresponding 720, in the scope of B22,720 spend with the 3rd misfire determining value B31, in the scope of B32,720 spend with the 4th misfire determining value B41, in the time of in the scope of B42, be judged to be not produce and catch fire end process.
Expression produces an example of the time variation of the rotation difference in change Nxd360 when catching fire in Fig. 4, the example that the time of the rotation difference in change Nxd720 when the expression generation is caught fire in Fig. 5 changes.During thereby postpone significantly to make the catalyst warm-up of purification plant 134 firing time that makes motor 22, burning is carried out lentamente, in rotating variation, rotation difference in change, produce deviation, so it is different to rotate the figure of difference in change, rotation difference in change Nxd360 and rotation difference in change Nxd720 are also slightly different.But no matter be to rotate difference in change Nxd360 or rotate difference in change Nxd720, the rotation difference in change that all shows the cylinder that catches fire for generation is compared to not have the rotation difference in change of the cylinder that generation catches fire big.As shown in the figure, when generation is caught fire, for 1 cylinder is only arranged in 1 circulation, rotate difference in change Nxd360 and obviously spend with the 1st misfire determining value A1 greater than 360, obviously spend with the 1st misfire determining value B1 with the corresponding rotation difference in change of this cylinder Nxd720 simultaneously greater than 720.In an embodiment, except such judgement, in order to suppress misinterpretation, use by rotating rotation difference in change that difference in change Nxd360 obtains and judge than Njb2, Njb3, Njb4 and catch fire than Nja2, Nja3, Nja4 with by rotating rotation difference in change that difference in change Nxd720 obtains.Thus, thus can correctly judge catching fire during postpone to make the catalyst warm-up of purification plant 134 firing time that makes motor 22 significantly accurately.
Judging misfire according to the internal-combustion engine of top illustrated embodiment's hybrid vehicle 20, utilize with 360 ° of CA of crank shaft angle before the rotation difference that changes Nxd promptly rotate difference that judgement that difference in change Nxd360 carries out and the rotation before utilization and 720 ° of CA of crank shaft angle change Nxd promptly rotate judgement that difference in change Nxd720 carries out when setting up judgement catch fire, so catch fire with only judging by the judgement of rotating difference in change Nxd360, perhaps only judge that by the judgement of rotating difference in change Nxd720 the situation of catching fire compares, can more correctly judge accurately to postpone significantly in the firing time that makes motor 22, thereby make catching fire during the catalyst warm-up of purification plant 134.And, since except by rotate difference in change Nxd360 greater than 360 degree with the 1st misfire determining value A1 and with respect to the rotation difference in change Nxd720 of same cylinder greater than the judgement of carrying out under 720 situations about spending with the 1st misfire determining value B1, also carry out by rotating rotation difference in change that difference in change Nxd360 obtains, so can more correctly judge accurately and catch fire than judgement that Nja2, Nja3, Nja4 carried out with by rotating rotation difference in change that difference in change Nxd720 obtains than the judgement that Njb2, Njb3, Njb4 carried out.
In the judging misfire of the internal-combustion engine of embodiment's hybrid vehicle 20, except by rotate difference in change Nxd360 greater than 360 degree with the 1st misfire determining value A1 simultaneously with respect to the rotation difference in change Nxd720 of same cylinder greater than the judgement of carrying out under the situations of 720 degree with the 1st misfire determining value B1, also carry out by rotate rotation difference in change that difference in change Nxd360 obtains than judgement that Nja2, Nja3, Nja4 carried out and by the rotation difference in change of rotation difference in change Nxd720 acquisition than judgement that Njb2, Njb3, Njb4 carried out; But also can spend on the judgement basis of carrying out greater than 720 with respect to the rotation difference in change Nxd720 of same cylinder simultaneously with the 1st misfire determining value A1 greater than 360 degree by rotating difference in change Nxd360 with the 1st misfire determining value B1, add by rotating rotation difference in change that difference in change Nxd360 obtains, judge and catch fire than judgement that Nja2, Nja3, Nja4 carried out or by rotating rotation difference in change that difference in change Nxd720 obtains than the arbitrary judgement in the judgement that Njb2, Njb3, Njb4 carried out; Also can be only by spending the judgement of carrying out with the 1st misfire determining value B1 with respect to the rotation difference in change Nxd720 of same cylinder greater than 720 greater than 360 degree simultaneously with the 1st misfire determining value A1 and judge and catch fire by rotating difference in change Nxd360.In addition, than the judgement that Nja2, Nja3, Nja4 carried out, needn't carry out rotating difference in change than the judgement of carrying out, also can only use any one rotation difference in change ratio wherein to judge by all for the rotation difference in change that obtains by rotation difference in change Nxd360.Equally, than the judgement that Njb2, Njb3, Njb4 carried out, needn't carry out rotating difference in change than the judgement of carrying out, also can only use any one rotation difference in change ratio wherein to judge by all for the rotation difference in change that obtains by rotation difference in change Nxd720.And then, also can replace by rotating rotation difference in change that difference in change Nxd360 obtains, use by other the rotation difference in change of rotating that difference in change Nxd360 obtains and compare the judgement carried out or compare the judgement of being carried out by other the rotation difference in change of rotating that difference in change Nxd720 obtains than judgement that Nja2, Nja3, Nja4 carried out or by rotating the judgement that rotation difference in change that difference in change Nxd720 obtains is carried out than Njb2, Njb3, Njb4.
In the judging misfire of the internal-combustion engine of embodiment's hybrid vehicle 20, use with 360 ° of CA of crank shaft angle before the rotation difference that changes Nxd promptly rotate difference in change Nxd360 and promptly rotate difference in change Nxd720 with the difference that rotation before 720 ° of CA of crank shaft angle changes Nxd, judge in the firing time that makes motor 22 and postpone significantly, thereby make catching fire during the catalyst warm-up of purification plant 134, but change the poor of Nxd so long as use with the rotation before of different crank shaft angle, be two different rotation difference in change, judge catching fire of motor 22 during the catalyst warm-up, can use with any crank shaft angle before rotation change the poor of Nxd.
In the judging misfire of the internal-combustion engine of embodiment's hybrid vehicle 20, calculate rotation with 120 ° of CA of the corresponding every crank shaft angle of ignition timing of each cylinder of motor 22 and change Nxd poor as the rotational speed N of 60 ° of CA of every crank shaft angle, but also it can be calculated as the difference according to the rotational speed N of each different crank shaft angle.In addition, also can calculate the rotational angle acceleration with 120 ° of CA of the corresponding every crank shaft angle of ignition timing of each cylinder of motor 22, and change Nxd used as rotating.
In the judging misfire of the internal-combustion engine of embodiment's hybrid vehicle 20, judge the catching fire of motor 22 of 6 cylinders in upright arrangement, but so long as the motor of multi cylinder for which type of motor all be suitable for.
Next, the judging misfire as the internal-combustion engine of the 2nd embodiment's of the present invention hybrid vehicle 20B is described.The 2nd embodiment's hybrid vehicle 20B has the hardware configuration identical with Fig. 1 and the 1st embodiment's shown in Figure 2 hybrid vehicle 20.Therefore, for the hardware configuration of the 2nd embodiment's hybrid vehicle 20B, for avoiding the explanation of repetition, detailed explanation is omitted.In the 2nd such embodiment hybrid vehicle 20B, misfire determining is handled when replacing the preheating of Fig. 3, and misfire determining is handled during the preheating of execution graph 6.Misfire determining is handled except append step S162, S164 step S160 after during the preheating of Fig. 6, and the misfire determining processing is identical during with the preheating of Fig. 3.Therefore, in the explanation that misfire determining is handled during the 2nd embodiment's below preheating, to handle different aspects be that the center describes to misfire determining with the preheating of Fig. 3 the time.
Too, when misfire determining was handled when carrying out preheating, motor was at first imported the necessary data of judgement (step S100) of catching fire from the crank shaft angle CA of crankshaft angle sensor 140 etc. with the CPU24a of electronic control unit 24 in the 2nd embodiment; Calculate the rotational speed N (step S110) of the bent axle 26 of 60 ° of CA of every crank shaft angle based on the crank shaft angle CA that is imported; Poor as the rotational speed N of 60 ° of CA of every crank shaft angle, the rotation of calculating 120 ° of CA of every crank shaft angle with the ignition timing of each cylinder of motor 22 accordingly changes Nxd (step S120); Change Nxd for the rotation of being calculated, rotation before calculating and 360 ° of CA of crank shaft angle changes the difference of Nxd and promptly rotates difference in change Nxd360, and the difference of the variation of the rotation before calculating and 720 ° of CA of crank shaft angle Nxd is promptly rotated difference in change Nxd720 (step S130, S140).Then, with the rotation difference in change Nxd360 that calculates and 360 degree with the 1st misfire determining value A1 compare (step S150); And the rotation difference in change Nxd720 that will calculate and 720 degree are with the 1st misfire determining value B1 compare (step S160); When rotation difference in change Nxd360 spends with 1st misfire determining value B1 with the 1st misfire determining value A1 or rotation difference in change Nxd720 smaller or equal to 720 smaller or equal to 360 degree, be judged to be not generation and catch fire end process.
Rotate difference in change Nxd720 simultaneously when spending with the 1st misfire determining value B1 greater than 360 degree with the 1st misfire determining value A1 rotating difference in change Nxd360 greater than 720, calculating compare with corresponding crank shaft angle 120 ° of rotations before the CA change Nxd (n-1) and again the rotations before 120 ° of CA, 240 ° of CA, 360 ° of CA, the 540 ° of CA change the poor of Nxd (n-2), Nxd (n-3), Nxd (n-4), Nxd (n-5), rotate difference in change Nm (1)～Nm (4) (step S162) as the centre; Whether each among middle difference in change Nm (the 1)～Nm (4) of rotation that judgement is calculated is all less than middle misfire determining value C1 (step S164).Here, as shown in Figure 7, middle difference in change Nm (the 1)～Nm (4) that rotates means, rotate and change Nxd (n-1) and rotate variation Nxd (n-2), Nxd (n-3), Nxd (n-4), Nxd's (n-5) is poor, wherein rotate and change Nxd (n) and pass through to rotate difference in change Nxd360, the igniting of the cylinder that rotates difference in change Nxd720 and be considered to catch fire is corresponding, and described rotation changes Nxd (n-1) corresponding to the igniting that is right after the cylinder of being lighted a fire before at rotation variation Nxd (n), described rotation changes Nxd (n-2), Nxd (n-3), Nxd (n-4), Nxd (n-5) with compare this cylinder the forward again the 1st, the 2nd, the 3rd, the igniting of the cylinder of the 4th igniting is corresponding, i.e. rotation corresponding to the igniting that is right after the cylinder before the cylinder that is considered to igniting (not catching fire) usually changes, with corresponding to than its more forward the rotation of igniting of cylinder change poor.Because be that roughly the same rotation changes, so and the difference of the corresponding rotation of the igniting of the cylinder of common igniting between changing become less value.Therefore, above-mentioned middle difference in change Nm (the 1)～Nm (4) that rotates also becomes less value.In the 2nd embodiment, consider such situation determine in the middle of misfire determining value C1.That is,, will be set at than the common value that can get value greatly with the difference that does not produce the corresponding rotation variation of the cylinder that catches fire as middle misfire determining value C1.
When rotating difference in change Nm (1)～Nm (4) in the centre all less than middle misfire determining value C1, will with spend the 3rd cylinder (step S170) that catches fire that is judged to be ignition order with rotation difference in change Nxd360, the corresponding cylinder of Nxd720 of the 1st misfire determining value B1 greater than 360 degree with the 1st misfire determining value A1,720; As illustrated among the 1st embodiment, calculate and rotate difference in change than Nja2～Nja4 (step S180); And calculate and rotate difference in change than Njb2～Njb4 (step S190); Carry out by rotating difference in change than Nja2～Nja4 and rotate the misfire determining that difference in change carries out than Njb2～Njb4 (step S200～S220).On the other hand, rotate in the centre difference in change Nm (1)～Nm (4) any one during more than or equal to middle misfire determining value C1, be judged to be and judge to produce and catch fire, do not carry out finishing this program by rotating difference in change than Nja2～Nja4 and rotate difference in change than the misfire determining that Njb2～Njb4 carries out.
Judging misfire according to the internal-combustion engine of top illustrated the 2nd embodiment's hybrid vehicle 20B, by with 360 ° of CA of crank shaft angle before the rotation difference that changes Nxd promptly rotate judgement that difference in change Nxd360 carries out and by with 720 ° of CA of crank shaft angle before the rotation difference that changes Nxd promptly rotate judgement that difference in change Nxd720 carries out when setting up, calculate to rotate to change Nxd (n-1) and rotate and change Nxd (n-2), Nxd (n-3), Nxd (n-4), the difference of Nxd (n-5) is as middle difference in change Nm (the 1)～Nm (4) that rotates, it is corresponding with the igniting of the cylinder that is considered to catch fire wherein to rotate variation Nxd (n), and described rotation changes Nxd (n-1) corresponding to the igniting that is right after the cylinder of being lighted a fire before at rotation variation Nxd (n), described rotation changes Nxd (n-2), Nxd (n-3), Nxd (n-4), Nxd (n-5) with compare this cylinder the forward again the 1st, the 2nd, the 3rd, the igniting of the 4th cylinder that quilt is lighted a fire is corresponding, rotate difference in change Nm (1)～Nm (4) in this centre all less than will be when not producing difference that the corresponding rotation of the cylinder that catches fire changes and be set at middle misfire determining value C1 than the common value that can get value greatly, judgement is caught fire, so can more correctly judge in the firing time that makes motor 22 and postpone significantly, thereby make catching fire during the catalyst warm-up of purification plant 134.Certainly, except by rotating difference in change Nxd360, rotate judgement that difference in change Nxd720 carries out, rotating the judgement that difference in change Nm (1)～Nm (4) carries out by the centre, also carry out by rotating rotation difference in change that difference in change Nxd360 obtains, so can more correctly judge accurately and catch fire than judgement that Nja2, Nja3, Nja4 carried out with by rotating rotation difference in change that difference in change Nxd720 obtains than the judgement that Njb2, Njb3, Njb4 carried out.
In the 2nd embodiment's hybrid vehicle 20B, calculate rotation variation Nxd (n-1) and change Nxd (n-2) with 4 rotations, Nxd (n-3), Nxd (n-4), the difference of Nxd (n-5) is as middle difference in change Nm (the 1)～Nm (4) that rotates, it is corresponding with the igniting of the cylinder that is considered to catch fire that wherein said rotation changes Nxd (n), and described rotation changes Nxd (n-1) corresponding to the igniting that is right after the cylinder of being lighted a fire before at rotation variation Nxd (n), described rotation changes Nxd (n-2), Nxd (n-3), Nxd (n-4), Nxd (n-5) with compare this cylinder the forward again the 1st, the 2nd, the 3rd, the igniting of the 4th cylinder that quilt is lighted a fire is corresponding, when rotating among difference in change Nm (1)～Nm (4) any in the middle of these 4 all less than middle misfire determining value C1, judgement is caught fire, but rotate difference in change Nm (1)～Nm (4) in the middle of needn't all calculating 4, also can calculate the centre smaller or equal to 3 of rotating among difference in change Nm (1)～Nm (4) 4 centres and rotate difference in change, when rotating difference in change all less than middle misfire determining value C1 in the middle of being calculated, judgement is caught fire.
In the 2nd embodiment's hybrid vehicle 20B, used the motor 22 of 6 cylinders, so rotate difference in change Nm (1)～Nm (4) in the middle of calculating 4, but as long as calculate (cylinder number-2) individual middle difference in change of rotating, as long as the cylinder number of motor 22 is more than 3 cylinders, can be any cylinder number.
In an embodiment, judging misfire to the motor 22 of the hybrid vehicle 20 that possesses motor 22, planetary gears 30 and two motor M G1, MG2 is illustrated, but also can also can be used as the judging misfire that is installed in the motor on the hybrid vehicle automobile in addition as the judging misfire of the motor on the hybrid vehicle that is installed in other structures.In addition, also can be as the judging misfire of the internal-combustion engine on the equipment that is assembled into the moving body beyond the automobile or does not move.
In an embodiment, form with the judging misfire that is installed in the motor 22 on the hybrid vehicle 20 is illustrated, but need not illustrate certainly, also can use with the form of the misfire determining method of the motor 22 of hybrid vehicle 20 or the form that is installed in the misfire determining method etc. of the motor on the automobile of other structures.
More than use mode of execution to be illustrated, but the present invention is not limited to described mode of execution, in the scope that does not break away from purport of the present invention, can implement with various forms certainly to being used to implement optimal morphology of the present invention.
The present invention can be applied in process industry of internal-combustion engine or its judging misfire etc.
Claims (17)
1. the judging misfire of an internal-combustion engine, it is the judging misfire of internal-combustion engine that catching fire in the multi-cylinder internal-combustion engine that can change firing time judged, it is characterized in that, comprising:
The pivotal position detection unit, it detects the pivotal position of the bent axle of described internal-combustion engine;
Rotate to change arithmetic element, it is based on described detected pivotal position, successively the firing time of each cylinder of computing and described internal-combustion engine corresponding crank shaft angle place the rotation variation of described internal-combustion engine;
Rotate the difference in change arithmetic element, its computing the 1st is rotated difference in change and the 2nd and is rotated difference in change, the wherein said the 1st rotate difference in change be the described rotation that generates successively change with this rotations change compare crank shaft angle be the rotation that generates before the 1st angle time change poor, the described the 2nd to rotate difference in change be that the described rotation that generates successively changes with changing with this rotations and compares the poor of rotation variation that crank shaft angle generates before the time for the 2nd angle different with described the 1st angle;
The misfire determining unit, it the described the 1st rotated difference in change and the described the 2nd and rotates difference in change and judge catching fire of described internal-combustion engine based on what calculated by described rotation difference in change arithmetic element before beginning from described engine starting to set up to predetermined condition.
2. the judging misfire of internal-combustion engine as claimed in claim 1 is characterized in that: the establishment of described predetermined condition is that the preheating of the catalyzer that Exhaust gas purifying device had of described internal-combustion engine finishes.
3. the judging misfire of internal-combustion engine as claimed in claim 1 is characterized in that: described internal-combustion engine is, the catalyzer that is had for preheating Exhaust gas purifying device when the starting and make the internal-combustion engine that lingeringly moves firing time.
4. the judging misfire of internal-combustion engine as claimed in claim 1, it is characterized in that, described misfire determining unit is to judge the unit that catches fire following the time: the described the 1st rotates difference in change more than or equal to the 1st predetermined value, and the described the 2nd rotates difference in change more than or equal to 2nd predetermined value different with described the 1st predetermined value.
5. the judging misfire of internal-combustion engine as claimed in claim 4, it is characterized in that: described the 1st predetermined value is set to than the little value of described the 2nd predetermined value.
6. the judging misfire of internal-combustion engine as claimed in claim 4, it is characterized in that, described misfire determining unit is to be judged to be the unit that catches fire following the time: promptly, the 1st object rotates difference in change and rotates ratio of difference in change another the 1st rotation difference in change in addition in the 1st catches fire with the predetermined ratio scope with the 1st object, and the 2nd object rotate difference in change and the 2nd object rotate beyond the difference in change another the 2nd ratio that rotates difference in change with the described the 1st catch fire with the predetermined ratio scope the different the 2nd catch fire use in the predetermined ratio scope in, it is the rotation difference in change of described the 1st rotation difference in change more than or equal to described the 1st predetermined value that wherein said the 1st object rotates difference in change, and it is the rotation difference in change of described the 2nd rotation difference in change more than or equal to described the 2nd predetermined value that described the 2nd object rotates difference in change.
7. the judging misfire of internal-combustion engine as claimed in claim 6 is characterized in that:
Described another the 1st rotates difference in change and comprises: rotate the 1st the rotating difference in change, rotate the 1st the rotating difference in change and rotate the 1st any one of rotating in the difference in change that difference in change is next the 1st cylinder with respect to described the 1st object of the 1st cylinder that difference in change is the front with respect to described the 1st object of the 3rd cylinder that difference in change is the front with respect to described the 1st object;
Described another the 2nd rotates difference in change and comprises: rotate the 2nd the rotating difference in change, rotate the 2nd the rotating difference in change and rotate the 2nd any one of rotating in the difference in change that difference in change is next the 1st cylinder with respect to described the 2nd object of the 1st cylinder that difference in change is the front with respect to described the 2nd object of the 3rd cylinder that difference in change is the front with respect to described the 2nd object.
8. the judging misfire of internal-combustion engine as claimed in claim 4, it is characterized in that, described misfire determining unit is to rotate difference in change when rotating difference in change more than or equal to 2nd predetermined value different with described the 1st predetermined value more than or equal to the 1st predetermined value and the described the 2nd the described the 1st, and first rotates and change and second rotate the difference that changes and rotate difference in change promptly less than judging the unit that catches fire in the middle of predetermined during predetermined value;
Wherein, described first rotates variation is, compares with corresponding crank shaft angle, and the rotation at the crank shaft angle place before the angle suitable with the phase place of described a plurality of cylinders is the phase angle changes;
Described second rotates variation is, compare with this corresponding crank shaft angle, the rotation at the crank shaft angle place before the angle after being multiplied each other at least one numerical value and phase angle changes, wherein, described at least one numerical value is at least one smaller or equal to the number that deducts numerical value 2 gained from the number of described a plurality of cylinders.
9. the judging misfire of internal-combustion engine as claimed in claim 8, it is characterized in that described misfire determining unit is rotate to change described first that the 3rd to rotate the difference that changes be to rotate difference in change in the middle of each all to judge the unit that catches fire less than described during predetermined value in the middle of predetermined with each;
Wherein, the described the 3rd rotates the rotation variation that variation is following angle each crank shaft angle place before, and this angle is the angle after will multiplying each other smaller or equal to each numerical value of the number that deducts numerical value 2 gained from the number of described a plurality of cylinders, with the phase angle.
10. the judging misfire of internal-combustion engine as claimed in claim 1 is characterized in that: described the 1st angle is 360 degree, and described the 2nd angle is 720 degree.
11. the judging misfire of internal-combustion engine as claimed in claim 1 is characterized in that: described rotation change arithmetic element be the described internal-combustion engine of computing bent axle each predetermined crank angle rotational angular velocity and come computing to rotate the unit of variation based on corresponding rotational angular velocity firing time with the difference of rotational angular velocity before the described predetermined crank angle of this rotational angular velocity with each cylinder of this internal-combustion engine.
12. the judging misfire of internal-combustion engine as claimed in claim 1 is characterized in that: it is that corresponding rotational angle acceleration firing time with each cylinder of described internal-combustion engine is changed the unit that carries out computing as described rotation that described rotation changes arithmetic element.
13. the judging misfire of internal-combustion engine as claimed in claim 1 is characterized in that: described internal-combustion engine is mounted on the hybrid vehicle, set the operating point of this internal-combustion engine independently and the internal-combustion engine that moves with respect to travelling state.
14. the misfire determining method of an internal-combustion engine, it is the misfire determining method of internal-combustion engine that catching fire in the multi-cylinder internal-combustion engine that can change firing time judged, it is characterized in that:
(a) based on the pivotal position of the bent axle of described internal-combustion engine, successively the firing time of each cylinder of computing and described internal-combustion engine corresponding crank shaft angle place the rotation of described internal-combustion engine change;
(b) computing the 1st is rotated difference in change and the 2nd and is rotated difference in change, the wherein said the 1st rotate difference in change be the described rotation that generates successively change with this rotations change compare crank shaft angle be the rotation that generates before the 1st angle time change poor, the described the 2nd to rotate difference in change be that the described rotation that generates successively changes with changing with this rotations and compares the poor of rotation variation that crank shaft angle generates before the time for the 2nd angle different with described the 1st angle;
(c) before beginning from described engine starting to set up, based on by described the described the 1st rotating difference in change and the described the 2nd and rotate difference in change and judge catching fire of described internal-combustion engine of calculating to predetermined condition.
15. the misfire determining method of internal-combustion engine as claimed in claim 14 is characterized in that: described step (c) is to use the preheating of the catalyzer that Exhaust gas purifying device had of described internal-combustion engine to finish this condition to judge the step of catching fire as described predetermined condition.
16. the misfire determining method of internal-combustion engine as claimed in claim 14 is characterized in that: described step (c) is to rotate the described the 1st to judge the step of catching fire when difference in change is rotated difference in change more than or equal to the 2nd predetermined value different with described the 1st predetermined value more than or equal to the 1st predetermined value and the described the 2nd.
17. the misfire determining method of internal-combustion engine as claimed in claim 14 is characterized in that: judge the catalyzer that is had for preheating Exhaust gas purifying device when the starting and make catching fire of the internal-combustion engine that lingeringly moves firing time.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005048446 | 2005-02-24 | ||
| JP048446/2005 | 2005-02-24 | ||
| JP259479/2005 | 2005-09-07 |
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| Publication Number | Publication Date |
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| CN101124393A CN101124393A (en) | 2008-02-13 |
| CN100585151C true CN100585151C (en) | 2010-01-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200680005544A Active CN100585151C (en) | 2005-02-24 | 2006-02-24 | Internal combustion engine misfire judging device and misfire judging method |
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| CN (1) | CN100585151C (en) |
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| CN102116241B (en) * | 2009-12-30 | 2015-01-21 | 中国第一汽车集团公司 | Method for diagnosing accidental fire of gasoline engine |
| CN109263656B (en) * | 2018-08-22 | 2020-11-27 | 科力远混合动力技术有限公司 | Fire coordination diagnosis method for engine of hybrid electric vehicle |
| JP6741131B1 (en) * | 2019-07-31 | 2020-08-19 | トヨタ自動車株式会社 | Internal combustion engine state detection system, data analysis device, and hybrid vehicle |
| JP7268663B2 (en) * | 2020-09-25 | 2023-05-08 | トヨタ自動車株式会社 | Misfire detection device for internal combustion engine |
| CN114856809B (en) * | 2022-04-14 | 2023-06-20 | 江铃汽车股份有限公司 | Vehicle engine fire test method and device, storage medium and electronic equipment |
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