CN101818694B - Cylinder-deactivation control method and device of electronic-control fuel-injection multi-cylinder internal-combustion engine - Google Patents
Cylinder-deactivation control method and device of electronic-control fuel-injection multi-cylinder internal-combustion engine Download PDFInfo
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- CN101818694B CN101818694B CN200910096202.XA CN200910096202A CN101818694B CN 101818694 B CN101818694 B CN 101818694B CN 200910096202 A CN200910096202 A CN 200910096202A CN 101818694 B CN101818694 B CN 101818694B
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Abstract
The invention relates to cylinder-deactivation control method and device of an electronic-control fuel-injection multi-cylinder internal-combustion engine. The cylinder-deactivation control method of the electronic-control fuel-injection multi-cylinder internal-combustion engine comprises the following steps of: (1) collecting a position sensor signal of a throttle of a throttle device by an ECU (Electronic-Control Unit) and calculating the size and the change rate of the position sensor signal; (2) collecting the temperature of an engine or the temperature of engine cooling liquid by the ECU; (3) measuring the rotating speed of the engine by the ECU; (4) calculating the lasting time of the latest working mode by the ECU; and (5) logically calculating a working mode of the next clock by the ECU according to the information and the preset working mode judging conditions, wherein the working modes of the next clock comprise (a) a full-cylinder working mode, (2) a partial cylinder-deactivation working mode and (3) a full oil-break mode. On the size and change rate plane of the position sensor signal, the operation state of the engine is divided into three areas by two boundary lines, i.e. a full-cylinder working area, a partial cylinder-deactivation working area and a hysteresis area. The invention can save fuel consumption of the engine under a normal working condition due to partial cylinder-deactivation work and can enhance the dynamic feeling of a vehicle while being forcefully and rapidly throttled.
Description
Technical field
The present invention relates to electronic fuel injection multi-cylinder engine (explosive motor), particularly realize automatically controlled intake duct/suction tude fuel-injected spark-ignition internal combustion engine device and the cylinder deactivation controlling method thereof of part cylinder deactivation work by stopping oil spout.
Background technique
Multi-cylinder internal combustion engine, particularly regulate the spark ignition type multi-cylinder engine of load by air inlet restriction, in the time that small load condition is worked, due to reasons such as mechanical efficiency is too low, burn deteriorations, fuel consumption rate is high more a lot of than large load, therefore, can improve by the mode of stop sub-cylinder work the load of remaining part working cylinder, thereby in identical total less output torque situation, reduce the fuel consumption rate of multi-cylinder engine.
The multi-cylinder engine that adopts electronic fuel injection fuel system, can be by stopping realizing easily part cylinder deactivation work to partial cylinders injected fuel.But, in the time that user needs moment of torsion frequent variations, just needing switching controls frequently, this may cause excessive torsional impact.In addition, for motorcycle automobile engine, in order to reduce the noxious gas emission of internal-combustion engine, often use exhaust device for catalytic treatment, and effective work of device for catalytic treatment, depend on the oxygen concentration in temperature and the exhaust of device for catalytic treatment completely.Above-mentioned cylinder deactivation control program may cause the oxygen concentration in temperature and the exhaust of device for catalytic treatment to be difficult to meet effective operating conditions requirement of device for catalytic treatment.U.S. Pat 4129109 discloses a kind of method that reduces switching shock, in the time approaching full load or approach idling, switch, but switching shock sense is still inevitable frequently, and the demand to high pulling torque when can not adapting to rapid refueling door and being not necessarily added to full load.U.S. Pat 4467602 discloses a kind of method of temperature of the exhaust device for catalytic treatment of controlling cylinder deactivation work, but the strategy of enriching control can increase fuel consume on the contrary.
Summary of the invention
The present invention's object is to provide a kind of cylinder deactivation controlling method and device of multi-cylinder electrically-controlled fuel-oil jetting IC engine, in the time manipulating this multi-cylinder electrically-controlled fuel-oil jetting IC engine by throttle or closure, can not produce frequently cylinder deactivation/restart switching, when switching, can not produce torsional impact beyong contemplation yet.
When being to realize fuel consume and harmful exhaust by the cylinder deactivation control of multi-cylinder electrically-controlled fuel-oil jetting IC engine, another object of the present invention reduces.
The present invention's object reaches by following technical proposal, it is a kind of cylinder deactivation controlling method of electronic fuel injection multi-cylinder engine, it is characterized in that, at least comprise the following steps: 1) ECU gathers the position sensor signal of throttle body or accelerator device, calculate its size and rate of change, 2) ECU gathers engine temperature or engine coolant temperature, 3) ECU measures engine speed, 4) ECU calculates the endurance of nearest mode of operation, 5) ECU is according to above-mentioned information and the mode of operation decision condition setting in advance, the mode of operation in next moment of logical calculated, described mode of operation comprises: a) full cylinder working pattern, i.e. all oil spouts of all oil sprayers, thereby all cylinder combustion actings of control engine, b) part cylinder deactivation work pattern, controls one group of cylinder oil-break, and another organizes cylinder fuel injection, only has one group of cylinder combustion acting thereby control, c) complete oil-break pattern, i.e. all oil-breaks of all cylinders, thus do not have cylinder to carry out work by combustion, motor is in by towing astern state, described mode of operation decision condition comprises: described engine temperature or engine coolant temperature be during lower than predefined value, cylinder working entirely, in position sensor signal size and rate of change plane, two boundary lines are set, article one, while increase for position, enter the boundary line 1 of full cylinder working pattern, article one, the boundary line 2 of entering part cylinder deactivation work pattern while reducing for position, article two, territory, region Wei Hui dead zone between boundary line, in territory, described time dead zone, gets final product full cylinder working, also can part cylinder deactivation work, depend on the mode of operation entering before this region, in idle position, when rotating speed is during higher than a certain preset value, enter complete oil-break mode of operation at position transducer, while entering non-idling operation from complete oil-break or idling, if oil-break and idling continuous operation Cumulative time are no more than a certain Preset Time completely, in territory, described time dead zone, still keep entering the mode of operation before complete oil-break and/or idling.
The present invention's technological scheme provides a kind of electronic fuel injection multi-cylinder internal combustion machine, comprise engine body, venting gas appliance, gas handling system, throttle body or accelerator device, fuel injector, ECU (Electrical Control Unit) ECU, it is characterized in that, venting gas appliance is at least divided into two groups of separate venting gas appliance, gas handling system comprises corresponding two groups of admission lines independently, fuel injector is also at least divided into independently two groups, the fuel oil spraying is only limited in this group admission line or cylinder, closure or throttle position switch are installed on throttle body or accelerator device, described ECU is according to the size of described position sensor signal and rate of change thereof, engine temperature or the engine coolant temperature of actual measurement, the information such as engine speed, and the described mode of operation decision condition setting in advance, the mode of operation in next moment of logical calculated is full cylinder working pattern, or part cylinder deactivation work pattern, or complete oil-break pattern.
Due to the switching of engine working mode, take two described boundary lines in described position sensor signal size (position coordinate) and rate of change (position rate coordinate) plane thereof as foundation, in the time that throttle body or throttle position increase with faster rate, or while progressively approaching large load position, to enter full cylinder working pattern, if enter from part cylinder deactivation work pattern or complete oil-break pattern, must be attended by the switching of mode of operation, engine output torque will there will be significantly to be increased, but the result that this operation is expected is carried out in this moment of torsion increase just operator, so can not produce factitious sensation, can feel on the contrary the powerful of engine power.On the other hand, in the time that throttle body or throttle position reduce with faster rate, or while progressively approaching minimum load position, by entering part cylinder deactivation work pattern or complete oil-break pattern, engine output torque will there will be significantly and reduce, this also just operator carry out the result that this operation is expected, so can not produce factitious sensation yet.Under the throttle body general or throttle operation state, what first enter is part cylinder deactivation work pattern, is therefore commonly using under operating mode, can capable of saving fuel oil consumption.And in the time rapidly throttle body or throttle being operated energetically, can enter immediately again full cylinder working pattern, thereby give full play to the power of motor.For frequent use small load condition, need to use once in a while the motorcycle automobile engine of high load working condition, the present invention can significantly reduce fuel consumption rate, strengthens the Q-feel of vehicle simultaneously.
In addition, while entering non-idling operation from complete oil-break or idling, in territory, described time dead zone, have ready conditions and keep entering the technological scheme of the mode of operation before complete oil-break and/or idling, can avoid pattern frequently to switch, reduce the frequent short time number of run of part cylinder deactivation work cylinder block, reduce cylinder deactivation work cylinder block working time in low-temperature condition, be conducive to exhaust gas post-treatment device and exhaust gas oxygen sensor etc. and need effective work of the device that the condition of high temperature can normally work, thereby reduce the noxious gas emission of internal-combustion engine.
Following technical proposal can further improve the present invention.
Described boundary line 1 and boundary line 2 trend towards reducing with the increase of described position coordinate, the intersection point of described boundary line 1 and described position coordinate axle is close to the fully open position of engine air throttle body or throttle, the intersection point of described boundary line 2 and described position coordinate axle is close to the idle position of engine air throttle body or throttle, thereby make the most frequently used operation great majority in part cylinder deactivation work pattern, fuel consume is few, and while only having fierce control node air door body or throttle, just can, with full cylinder working work pattern, give play to the maximum power of motor.
When described engine temperature or engine coolant temperature are during lower than predefined value, idle running after ato unit will carry out with full cylinder working pattern, when temperature reaches a certain predetermined value, or reach a certain predetermined value when idling speed, or the engine running time reaches after a certain predetermined value, idling will be chosen at random one group of cylinder and stop oil spout, thereby carry out normal idling with part cylinder deactivation work pattern, after this, if from other pattern entering part cylinder deactivation work pattern, keep same group of cylinder to stop oil spout always.Can improve like this engine idle rotating speed after cold-starting, shorten warming-up process, and normal idling still adopts part cylinder deactivation work pattern can reduce idling fuel consume, the vent systems of in running order cylinder will be all the time in warming up state always, is conducive to effective work that exhaust gas post-treatment device and exhaust gas oxygen sensor etc. need the device that the condition of high temperature can normally work.
In the time that described engine temperature or engine coolant temperature are not less than predefined value, idle running after ato unit will be chosen one group of not oil spout of cylinder at random, thereby carry out normal idling with part cylinder deactivation work pattern, after this, if from other pattern entering part cylinder deactivation work pattern, keep same group of cylinder to stop oil spout always.It is durable consistent that design can keep the wearing and tearing of two groups of cylinder system like this, the working life of improving whole internal-combustion engine.
Cylinder deactivation controlling method and the device of electronic fuel injection multi-cylinder engine of the present invention, be particularly useful for the spark-ignited internal combustion engine of suction tude or intake port injection, each group cylinder has independently fuel injector and admission line, and the fuel oil of described fuel injector ejection is only distributed in the admission line and cylinder of oneself.Electronic fuel injection multi-cylinder engine of the present invention, is equally applicable to the spark-ignited internal combustion engine of inner cylinder direct injection.Spark-ignited internal combustion engine is owing to need to adopting the method regulation output power of air inlet restriction, thus in the time of little load, adopt part cylinder deactivation work pattern can significantly reduce the pumping loss of motor, thus can significantly reduce fuel consumption rate.
Cylinder deactivation controlling method and the device of electronic fuel injection multi-cylinder engine of the present invention, be particularly useful for Engine Injection Mass and adopt the automobile and motorcycle spark-ignited internal combustion engine of exhaust gas oxygen sensor signal feed back closed loop control.Because the air inlet system and exhaust system of working cylinder group and cylinder deactivation work cylinder block are completely independent, even so do not adopt complicated valve stop control, still can keep working cylinder group to work under desirable air fuel ratio, harmful exhaust treatment device in described venting gas appliance, as triple mode catalytic converter etc., still can efficient operation, and two groups of vent systems take turns to operate, and the life-span is longer.
Cylinder deactivation controlling method and the device of electronic fuel injection multi-cylinder engine of the present invention, be particularly useful for double-cylinder motorcycle engine.
In sum, benefit of the present invention is, 1) under conventional operating mode, can be by adopting all or part of cylinder deactivation work pattern, capable of saving fuel oil consumes, and in the time rapidly throttle body or throttle being operated energetically, can enter immediately again full cylinder working pattern, give full play to the power potentiality of motor; 2) switching of mode of operation, can not make operator produce factitious sensation; 3) can keep the wearing and tearing of two groups of cylinder system durable consistent, the working life of improving whole internal-combustion engine; 4) can make working cylinder group reach as quickly as possible and remain on ideal temperature and air fuel ratio state, make the harmful exhaust treatment device in venting gas appliance, as triple mode catalytic converter etc., can efficient operation, and the life-span is longer, thus the noxious gas emission of minimizing internal-combustion engine.
Accompanying drawing explanation
Fig. 1 is the system composition schematic diagram of the present invention's embodiment's electronic fuel injection twin-tub spark-ignition internal combustion engine.
Fig. 2 is the present invention's embodiment's the mode of operation area schematic in position sensor signal size and rate of change plane.
Fig. 3 is the present invention's embodiment's cylinder deactivation work mode decision subroutine logical flow chart.
Fig. 4 is explanation the present invention's embodiment's working mode change process schematic diagram.
Relevant parameters variable symbol in above-mentioned figure is defined as follows:
TP---throttle body or throttle position
The idle position of idle---throttle body or throttle
N---rotating speed
Ncutoff---all critical speed of rotation of cylinder oil-break
DTP---throttle body or throttle position variance ratio
Teng---engine temperature or engine coolant temperature
TLow---do not carry out critical engine temperature or the engine coolant temperature of cylinder deactivation work
τ Low---under low temperature, do not carry out the motor operation crash time of cylinder deactivation work or rotate the number of turns
τ run---working time or the rotation number of turns after engine start
The endurance of τ 01---non-full cylinder working mode operation or the rotation number of turns
τ deact---interrupt the shortest time of full cylinder working mode operation or rotate the number of turns
CT---motor judges time cycle or the turning collar one number time of mode of operation
Mode---mode of operation, Mode=0 is the complete oil-break patterns of whole cylinders, and Mode=1 is partial cylinders oil-break pattern, and Mode=2 is full cylinder working pattern.
BL1---motor enters the boundary line of full cylinder working pattern
BL2---motor leaves the boundary line of full cylinder working pattern
The maximum position (fully open position) of Full_Load---engine air throttle body or throttle
Area A---full cylinder working mode region
Area B---cylinder deactivation work mode region
Area C---mode of operation is gone back to territory, dead zone
Vi (i=1 ~ 8)---motor is commonly used operating process profile
Describe the present invention in detail by these accompanying drawings below.
Embodiment
In the embodiment shown in fig. 1, multi-cylinder engine is the petrol engine of a twin-tub electronic controlled fuel intake port injection, the shared parts of twin-tub comprise: air filter 22, throttle position sensor 2, throttle operation runner 20, rotating speed and footmark sensor 7, engine body 12, engine temperature sensing unit 10, electronic control unit (ECU) 11, ignition energy generator 13, load operation runner 20, and the parts that two cylinders independently use have, the first cylinder system individual components comprises: throttle body 1, intake duct 25, fuel injector 4, spark plug 6, outlet pipe 8, lambda sensor 9, exhaust device for catalytic treatment 5, exhaust silencer 3 etc., the second cylinder system individual components comprises: throttle body 21, intake duct 23, fuel injector 18, spark plug 16, outlet pipe 15, lambda sensor 14, exhaust device for catalytic treatment 17, exhaust silencer 19 etc.Throttle body 1 and throttle body 21 are by the coaxial air inflow that connects synchronization regulation two cylinders of synchronizer 24, by load operation runner 20 synchronous manipulations, throttle position sensor 2 is measured position TP and the rate of change dTP of throttle body 1 and throttle body 21, and signal is imported into ECU 11.ECU 11 also gathers the information that other sensors record, and at least comprises: the first cylinder and the EGO2 Exhaust Gas Oxygen concentration of the second cylinder etc. that the engine temperature that engine temperature sensing unit 10 is measured or engine coolant temperature teng, the engine speed N, lambda sensor 9 and the lambda sensor 14 that calculate by the pulse signal of rotating speed and footmark sensor 7 record.ECU 11 is according to the engine condition and the control logic that record, the fuel injector 4 and 18 of controlling respectively the first cylinder and the second cylinder is to intake duct 25 and 23 interior injected fuel separately or cut off fuel oil, control igniting energy production arrangement 13 and provide igniting to spark plug 6 and 16 respectively, thereby make motor according to different mode of operation work.
The mode of operation of motor is divided into 3 kinds: a) full cylinder working pattern, i.e. all oil spouts of all oil sprayers, thereby all cylinder combustion actings of control engine; B) part cylinder deactivation work pattern, controls a cylinder oil-break, another cylinder fuel injection; C) complete oil-break pattern, i.e. all oil-breaks of all cylinders, thus do not have cylinder to carry out work by combustion, motor is in by towing astern state.Under different engine driving states, motor may be in different mode of operations, as shown in Figure 2, on the throttle position sensor signal size TP and its rate of change dTP plane that describe engine driving state, be provided with two unidirectional boundary lines, article one, while increase for position, enter the boundary line BL1 of full cylinder working pattern, article one, the boundary line BL2 of entering part cylinder deactivation work pattern while reducing for position, article two, TP-dTP plane is divided into 3 regions by boundary line, region, BL1 upper right, boundary line is full cylinder working region, in this region, motor is with full cylinder working work pattern, region, BL2 left bottom, boundary line is cylinder deactivation work region, and in this region, motor is with part cylinder deactivation work pattern or oil-break mode of operation work completely, article two, the territory, Wei Hui dead zone, region between unidirectional boundary line, in territory, described time dead zone, can full cylinder working, also can part cylinder deactivation work, depend on the mode of operation entering before this region, at idle position, i.e. TP=idle, when rotating speed is during higher than a certain preset value Ncutoff, enters complete oil-break mode of operation.
The features of shape of described boundary line BL1 and boundary line BL2 as shown in Figure 2, with the increase of described position coordinate TP, boundary line trends towards lower right, though be the increase of the dTP TP on boundary line and reducing, the intersection point P1 of described boundary line BL1 and described position coordinate axle is close to the fully open position Full_Load of engine air throttle, and the intersection point P2 of described boundary line BL2 and described position coordinate axle is close to the idle position idle of engine air throttle.
For working cylinder (group), if oxygen sensor signal is good for use, to carry out closed-loop feedback adjusting to its fuel injection quantity, gasoline air mixture ratio when as far as possible this working cylinder (group) being worked is controlled at theoretical equivalent proportion, allow exhaust catalyst work in the most effective mode, reduce noxious gas emission.
According to such scheme, engine idle is always in part cylinder deactivation work pattern, and accelerate starting travel after, always take part cylinder deactivation work pattern as priority task pattern, as for choosing which group or which cylinder deactivation, can determine at random, but once the cylinder deactivation cylinder block of having determined part cylinder deactivation work, so after this, unless restarted after killing engine,, in the time of part cylinder deactivation work pattern, keep same group of cylinder to stop oil spout always.Design is very beneficial for saving fuel oil like this, can guarantee that the wearing and tearing of all cylinders are durable consistent simultaneously, and the device of all vent systems, comprises lambda sensor and catalyst etc., and uniformity is durable aging, extends the life-span of whole motor.Can also keep in addition the temperature of the vent systems of working cylinder group to meet all the time the requirement that the device of vent systems can efficient operation.
But, under low temperature environment when starting a cold engine, if do not have idling to improve device, will be because engine friction resistance be excessive warming-up very slowly, easily flame-out.In order to overcome this problem, can be under low temperature environment when starting a cold engine, adopt full cylinder working pattern, when engine temperature or engine coolant temperature are during lower than predefined value tLow, idle running after ato unit will carry out with full cylinder working pattern, when temperature reaches a certain predetermined value tLow, or reach a certain predetermined value N0 when idling speed, or the working time or the number of turns τ run that start rear engine have reached predetermined value τ Low, idling will be chosen at random one group of cylinder and stop oil spout, thereby carry out normal idling with part cylinder deactivation work pattern, after this, if from other pattern entering part cylinder deactivation work pattern, keep same group of cylinder to stop oil spout always.This design is equivalent to improve device using one group in two groups of cylinders as cold-starting idling and uses.
Fig. 3 has provided the logical process of the cylinder deactivation controlling method of the present invention's electronic fuel injection multi-cylinder engine.
Mode of operation subroutine by according to the definite logic shown in Fig. 3 to mode of operation parameter Mode assignment, or keep the value of current Mode.Calling before cylinder deactivation control mode of operation subroutine, out-of-work cylinder when main program has been determined part cylinder deactivation at random, is entering after mode of operation subroutine, first obtain motor current various states and parameter, comprise TP, dTP, teng, N, τ 01, τ run etc., then judge whether not enter or do not continue the full cylinder working pattern of cold-starting, if judged result is "No", makes Mode=2 and return; If judged result is "Yes", judge whether again not enter or do not keep " full cylinder working region Area_A ", if judged result is "No", makes Mode=2 and return; If judged result is "Yes", judge whether again not enter or do not keep " cylinder deactivation work region Area_B ", if judged result is "No", further judgement is complete oil-break or part cylinder deactivation, if TP=idle and N>Ncutoff, oil-break, makes Mode=0 and returns, if TP is not equal to idle or N<=Ncutoff completely, entering part cylinder deactivation pattern, makes Mode=1 and returns; If judged result is not for entering or do not keep " cylinder deactivation work region Area_B ", showing should be in " returning stagnant working zone Area_C ", judge again whether the endurance τ 01 that leaves full cylinder working pattern has been greater than default time τ deact, if τ 01> τ is deact, show to finish current full cylinder working pattern, the mode of operation going back to stagnant working zone below should be part cylinder deactivation pattern, makes Mode=1 and returns; If τ 01 is not more than τ deact, show that Mode value is not done change and returned without changing current mode of operation.In the time of Mode=2, τ 01 return-to-zero, otherwise τ 01 increases one-period CT.
The object of setup times τ deact is, after full cylinder working pattern starts, can be because of the full cylinder working pattern of leaving of short time just again again take part cylinder deactivation work pattern as preferential, but in the time that the time τ 01 that leaves full cylinder working pattern is not more than τ deact, continue to keep full cylinder working pattern, the cylinder block that can as far as possible reduce like this part cylinder deactivation work is frequently carried out the continuous firing of short time, reduces this cylinder block and causes the phenomenon of lambda sensor and the long-term non-normal working of exhaust catalyst to occur because of frequent short time continuous firing.The situation of leaving full cylinder working pattern of this short time the most easily occurs in Shift into accelerating process.Only have in the time leaving the time τ 01 of full cylinder working pattern and be greater than τ deact, the most possible situation is that high pulling torque demand above finishes, so cylinder deactivation work model selection below take part cylinder deactivation work pattern as preferential, is beneficial to capable of saving fuel oil again.Enter Area_A if certainly again operate the state of throttle, so still immediately again with full cylinder working work pattern.
Take automobile and motorcycle motor as example, common engine operating state process as shown in Figure 4.Steady operational status point is the point in TP coordinate axes, the variation track that the curve V1 ~ V8 in figure is various dynamic state of run.Because dTP > 0 means TP increase, dTP<0 means that TP reduces, so dynamic state of run will change by the direction of arrow on curve V1 ~ V8.V1 curve has represented the process of accelerating with medium torque from idling, generally, by the preferentially medium and small moment of torsion acceleration with part cylinder deactivation pattern, in particular cases, after cold-starting, the middle high pulling torque with full cylinder working pattern is accelerated.V2 curve has represented the process of accelerating with Maximum Torque from idling, after the line BL1 that passes across the border, the Maximum Torque with full cylinder working pattern is accelerated.V3 curve has represented from medium steady torque and has lighted to approach the process that Maximum Torque is accelerated, if initial medium steady torque point is part cylinder deactivation work pattern, is passing across the border after line BL1 the Maximum Torque acceleration with full cylinder working pattern.V4 curve has represented from less medium steady torque lights the process of accelerating with slightly a little bigger moment of torsion, because do not pass across the border line, so mode of operation can not change, be initiated with part cylinder deactivation work pattern and continue retaining part cylinder deactivation work pattern, be initiated with full cylinder working pattern and continue to keep full cylinder working pattern.V5 curve has represented that the maximum torque point from approaching standard-sized sheet gets back to the moderating process of idle position fast, original state is with full cylinder working work pattern, in the time passing through BL1, still keep full cylinder working pattern, but pass through will be first with part cylinder deactivation work work pattern after BL2, once get back to idle position idle, complete oil-break a period of time likely also, until rotating speed is reduced to below Ncutoff, again with part cylinder deactivation work pattern idling.V6 curve has represented the moderating process with V5 curve approximation, difference is that initial point moment of torsion is relatively smaller, may be in part cylinder deactivation work pattern, passing through after BL2 retaining part cylinder deactivation work pattern in this case, but also may be in full cylinder working pattern, performance is in this case identical with V5 curve.V7 curve has represented the process contrary with V4 curve, light the process so that slightly the moment of torsion of point slows down from larger medium steady torque, because do not pass across the border line, so mode of operation can not change, be initiated with part cylinder deactivation work pattern and continue retaining part cylinder deactivation work pattern, be initiated with full cylinder working pattern and continue to keep full cylinder working pattern.V8 curve has represented the process of lighting slow-action and save medium torque from maximum stable moment of torsion, remains full cylinder working pattern.
Above-described embodiment is the petrol engine of application twin-tub electronic controlled fuel intake port injection of the present invention, but the present invention is equally applicable to the petrol engine of the multi-cylinder electronic controlled fuel intake port injection of three cylinders and above cylinder number thereof, only need intake duct and vent systems to be divided into two groups.The present invention is equally applicable to the petrol engine of multi-cylinder inner cylinder direct injection, at this moment only requires that vent systems is divided into two groups.The present invention is also applicable to the diesel engine of automatically controlled multi-cylinder inner cylinder direct injection, in this case, does not need throttle body, and TP and dTP are throttle position and rate of change thereof.
The object of above-described embodiment is for the present invention is described, but does not limit the present invention.That all the present invention's of utilization design and Spirit Essence carry out, apparent change design for the those of ordinary skill of related domain, still belong to the protection domain of the present invention's claim.
Claims (10)
1. the cylinder deactivation controlling method of an electronic fuel injection multi-cylinder internal combustion engine, it is characterized in that, at least comprise the following steps: 1) ECU gathers the position sensor signal of closure or accelerator device, calculate its size and rate of change, 2) ECU gathers engine temperature or engine coolant temperature, 3) ECU measures engine speed, 4) ECU calculates the endurance of nearest mode of operation, 5) ECU is according to above-mentioned information and the mode of operation decision condition setting in advance, the mode of operation in next moment of logical calculated, described mode of operation comprises: a) full cylinder working pattern, i.e. all oil spouts of all oil sprayers, thereby all cylinder combustion actings of control engine, b) part cylinder deactivation work pattern, controls one group of cylinder oil-break, and another organizes cylinder fuel injection, only has one group of cylinder combustion acting thereby control, c) complete oil-break pattern, i.e. all oil-breaks of all cylinders, thus do not have cylinder to carry out work by combustion, motor is in by towing astern state, described mode of operation decision condition comprises: described engine temperature or engine coolant temperature be during lower than predefined value, cylinder working entirely, in position sensor signal size and its rate of change plane, two boundary lines are set, article one, while increase for position, enter the boundary line 1 of full cylinder working pattern, article one, the boundary line 2 of entering part cylinder deactivation work pattern while reducing for position, article two, territory, region Wei Hui dead zone between boundary line, in territory, described time dead zone, gets final product full cylinder working, also can part cylinder deactivation work, depend on the mode of operation entering before this region, at idle position, when rotating speed is during higher than a certain preset value, enter complete oil-break mode of operation, while entering non-idling operation from complete oil-break or idling, if oil-break and idling continuous operation Cumulative time are no more than a certain Preset Time completely, in territory, described time dead zone, still keep entering the mode of operation before complete oil-break and/or idling.
2. the cylinder deactivation controlling method of electronic fuel injection multi-cylinder internal combustion engine as claimed in claim 1, it is characterized in that, described engine temperature or engine coolant temperature are during lower than predefined value, idle running after ato unit will carry out with full cylinder working pattern, when temperature reaches a certain predetermined value, or reach a certain predetermined value when idling speed, or the engine running time reaches after a certain predetermined value, idling will be chosen at random one group of cylinder and stop oil spout, thereby carry out normal idling with part cylinder deactivation work pattern, after this, if from other pattern entering part cylinder deactivation work pattern, keep same group of cylinder to stop oil spout always.
3. the cylinder deactivation controlling method of electronic fuel injection multi-cylinder internal combustion engine as claimed in claim 2, it is characterized in that, being shaped as of described boundary line 1 and boundary line 2: along described boundary line, increase rate of change with described position sensor signal size trends towards reducing, the intersection point of the position coordinate axis of described boundary line 1 and closure or accelerator device is close to the fully open position of engine air throttle or throttle, and the intersection point of the position coordinate axis of described boundary line 2 and closure or accelerator device is close to the idle position of engine air throttle or throttle.
4. the cylinder deactivation controlling method of electronic fuel injection multi-cylinder internal combustion engine as claimed in claim 3, it is characterized in that, when described engine temperature or engine coolant temperature are not less than predefined value, idle running after ato unit will be chosen one group of not oil spout of cylinder at random, thereby carry out normal idling with part cylinder deactivation work pattern, after this, if from other pattern entering part cylinder deactivation work pattern, keep same group of cylinder to stop oil spout always.
5. the cylinder deactivation controlling method of electronic fuel injection multi-cylinder internal combustion engine as claimed in claim 4, is characterized in that, the fuel injection quantity of the working cylinder of described motor adopts the closed loop control of exhaust gas oxygen sensor signal feed back.
6. an electronic fuel injection multi-cylinder internal combustion machine, comprise engine body, venting gas appliance, gas handling system, closure or accelerator device, fuel injector, ECU (Electrical Control Unit) ECU, it is characterized in that, venting gas appliance is divided into two groups of separate venting gas appliance, gas handling system comprises corresponding two groups of admission lines independently, fuel injector is also divided into independently two groups, the fuel oil spraying is only limited in this group admission line or cylinder, closure or throttle position switch are installed on throttle body or accelerator device, described ECU is according to the size of described position sensor signal and rate of change thereof, engine temperature or the engine coolant temperature of actual measurement, engine speed information, and the mode of operation decision condition setting in advance, the mode of operation in next moment of logical calculated: a) full cylinder working pattern, i.e. all oil spouts of all oil sprayers, thereby all cylinder combustion actings of control engine, b) part cylinder deactivation work pattern, controls one group of cylinder oil-break, and another organizes cylinder fuel injection, only has one group of cylinder combustion acting thereby control, c) complete oil-break pattern, i.e. all oil-breaks of all cylinders, thus do not have cylinder to carry out work by combustion, motor is in by towing astern state, described mode of operation decision condition comprises: described engine temperature or engine coolant temperature be during lower than predefined value, cylinder working entirely, in position sensor signal size and its rate of change plane, two boundary lines are set, article one, while increase for position, enter the boundary line 1 of full cylinder working pattern, article one, the boundary line 2 of entering part cylinder deactivation work pattern while reducing for position, article two, territory, region Wei Hui dead zone between boundary line, in territory, described time dead zone, gets final product full cylinder working, also can part cylinder deactivation work, depend on the mode of operation entering before this region, at idle position, when rotating speed is during higher than a certain preset value, enter complete oil-break mode of operation, while entering non-idling operation from complete oil-break or idling, if oil-break and idling continuous operation Cumulative time are no more than a certain Preset Time completely, in territory, described time dead zone, still keep entering the mode of operation before complete oil-break and/or idling.
7. electronic fuel injection multi-cylinder internal combustion machine as claimed in claim 6, is characterized in that, described multi-cylinder internal combustion engine is twin-tub explosive motor, and each group is a cylinder.
8. electronic fuel injection multi-cylinder internal combustion machine as claimed in claim 7, it is characterized in that, described explosive motor is the spark ignition type internal combustion engine of suction tude or intake port injection, each group is a cylinder, each cylinder has fuel injector and admission line separately, and the fuel oil of described fuel injector ejection is only distributed in the admission line and cylinder of oneself.
9. electronic fuel injection multi-cylinder internal combustion machine as claimed in claim 8, it is characterized in that, described two groups independently on venting gas appliance device have lambda sensor, described ECU is according to the mixture strength of the cylinder of the signal closed-loop feedback control combustion acting of each lambda sensor.
10. electronic fuel injection multi-cylinder internal combustion machine as claimed in claim 9, is characterized in that, described two groups independently on venting gas appliance device have exhaust gas purification processing catalyst.
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| CN200910096202.XA CN101818694B (en) | 2009-02-26 | 2009-02-26 | Cylinder-deactivation control method and device of electronic-control fuel-injection multi-cylinder internal-combustion engine |
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