CN108116397A - A kind of control method of automatic catch automobile - Google Patents

Abstract

The invention discloses a kind of control methods of automatic catch automobile, comprise the following steps：When controller receives braking/assisted instruction, the cylinder of at least one engine is controlled to stop/starting work, the operating load of engine increases at this time；Monitoring system is monitored engine speed and automobile driving speed；Downshift/upshift of gearbox is performed according to monitoring result；Continue the load to engine to be monitored；When the load of the engine monitored is more than nominal load, then it represents that the gearbox jams of automobile.The control method of the present invention is capable of the gearshift of the relatively control automatic block vehicle of smooth-going, and the failure of vehicle gear box can be diagnosed according to the operating parameter of monitoring engine.

Description

A kind of control method of automatic catch automobile

Technical field

The present invention relates to field of automobile control, and in particular to a kind of control method of automatic catch automobile.

Background technology

At present, in existing automatic block vehicle there is normally only a kind of normal mode, including pedal pattern and corresponding change Gear pattern.Since the formulation of the pedal pattern under normal mode will consider many factors such as vehicle dynamic property, noise so that its Cannot engine torque accurately be changed according to drive demand, so as to cause the consumption of excess fuel amount.

In addition, the formulation of shift mode is also required to consider the influence to vehicle in controller of gear-boxes.Therefore, adjust With the shift mode under normal mode, the shifting points of each gear are simply simply reduced, it is unknown to complete-vehicle oil consumption reducing effect Aobvious, energy transfer efficiency is than relatively low.

The content of the invention

It is an object of the invention to solve above-mentioned technical problem to a certain extent.

The task of the present invention is to provide a kind of control method of automatic catch automobile, comprise the following steps：

When controller receives braking/assisted instruction, the cylinder that controls at least one engine stops/starting work, The operating load of engine increases at this time；

Monitoring system is monitored engine speed and automobile driving speed；

Downshift/upshift of gearbox is performed according to monitoring result；

Continue the load to engine to be monitored；

When the load of the engine monitored is more than nominal load, then it represents that the gearbox jams of automobile.

Wherein, determine whether that setting gearbox shifting in the controller asks before downshift/upshift of gearbox is performed Signal is sought, the request signal indicates whether the gearbox shifting will occur.

Wherein, one or both of brake pedal and accelerator pedal are monitored before downshift/upshift of gearbox is performed Position.

Wherein, the acceleration of vehicle is supervised before downshift/upshift of gearbox is performed.

Wherein, the controller control the cylinder of at least one engine stop/starting work for stopping/starting fluid to Injection in cylinder.

Wherein, stop when controller controls the cylinder of at least one engine/when starting work, beat and sent out described in opening/closing The air inlet shutter of motivation.

Wherein, stop when controller controls the cylinder of at least one engine/when starting work, detected via lambda sensor Ambient humidity.

Wherein, one or more engine operation parameters are adjusted based on the ambient humidity detected.

A kind of control method of automatic catch automobile provided by the invention is capable of changing for the relatively control automatic block vehicle of smooth-going Gear, and the failure of vehicle gear box can be diagnosed according to the operating parameter of monitoring engine.

Description of the drawings

Attached drawing is for providing a further understanding of the present invention, and a part for constitution instruction, with following tool Body embodiment is used to explain the present invention together.In the accompanying drawings：

Fig. 1 is control flow chart according to embodiments of the present invention.

Specific embodiment

The embodiment of the present invention is described below in detail, the example of the embodiment is shown in the drawings, and embodiment is example Property, for explaining the present invention, and it is not considered as limiting the invention.

The control method of automatic catch automobile according to embodiments of the present invention is specifically described below in conjunction with the accompanying drawings.

In one preferably example, when controller receives braking/assisted instruction, at least one engine is controlled Cylinder stops/starting work, and the operating load of engine increases at this time；Monitoring system is to engine speed and automobile driving speed It is monitored；Downshift/upshift of gearbox is performed according to monitoring result；Continue the load to engine to be monitored；Work as monitoring When the load of the engine arrived is more than nominal load, then it represents that the gearbox jams of automobile.

In the present embodiment, as shown in Figure 1, controlling the side of the operation of engine in response to gearbox shifting during DFSO The flow chart of method.In the present embodiment, control method includes reducing engine loading in response to the gearbox shifting that will be carried out It is operated simultaneously under DFSO.For example, control gearbox and the engine of lambda sensor combination can be used.Wherein, deceleration fuel is cut Disconnected (Deceleration fuel shut off, DFSO) is a kind of fuel economy for raising motor vehicles and improves braking The operating mode of benefit is worn, principle is during specific operating mode, and cut-out is ejected into the fuel of one or more cylinder.

Further, in above-mentioned control method, determine that engine operating condition is appropriate for start DFSO.In DFSO Period can operate engine in the case where the rotation simultaneously of no fuel injection and pumped air are by cylinder.

In a further preferred embodiment, can be used car speed, vehicle acceleration, engine speed, engine loading, One or more of throttle position, pedal position, gearbox gear positions or various other parameters determine whether out Beginning DFSO.

Wherein, if engine speed is less than threshold rotation rate, DFSO can be started.

In a further preferred embodiment, if engine loading is less than threshold value, DFSO can be started.

The change of accelerator pedal position and/or accelerator pedal position within one suitable time is may be based on to start DFSO, if for example, accelerator pedal position changes of threshold instruction driver receive throttle have occurred and that, DFSO can be started. Alternately, can be determined based on the command signal for stopping fuel injection into DFSO.If it is determined that engine operating condition is not It is suitble to start DFSO, then terminates above-mentioned control method.If it is determined that engine operating condition is suitble to start DFSO, then start above-mentioned Control method.DFSO starts, such as starts DFSO by stopping to the fuel injection of engine, and leads in some instances It crosses and spark ignition is stopped to spark ignition engine to start DFSO.

At the 506 of control method 500, determine that engine operating condition starts humidity inspection if appropriate for via lambda sensor It surveys.In some instances, if at least threshold duration has been carried out in DFSO, Humidity Detection can be started.The threshold value is held The continuous time can be due to fuel combustion generate hydrocarbon substantially on not in the gas stream received by lambda sensor after Duration.In other examples, if engine operated under the conditions of non-fueling and engine cylinder extremely A few inlet valve and at least one exhaust valve are opened, then can start Humidity Detection.If it is determined that engine operating condition is uncomfortable Run beginning Humidity Detection jointly, then control method 500 terminates.If it is determined that engine operating condition is suitble to start Humidity Detection, then control Method 500 processed enters 508.

At the 508 of control method 500, start the Humidity Detection via lambda sensor.Humidity Detection may include via oxygen Sensor measuring environment humidity.According to this, the air inlet shutter for starting may include to open engine of Humidity Detection is to reduce or keep away Exempt from the presence of PCV hydrocarbons.The detection of ambient humidity is referred to alternatively as diagnosing.It in other examples, can be by opposite Power operation under the conditions of high load and non-fueling performs the diagnosis in addition to ambient humidity detects.

At the 510 of control method 500, the gearbox shifting that will be carried out is predicted.The gearbox that predicting will carry out changes Gear may include to determine whether to be set gearshift request mark 512.Controller can will shift gears according to definite gearbox and be set Gearshift request mark.According to this, the gearshift that mark instruction will carry out.Because mark setting and actual gearbox shifting it Between exist delay, therefore can provide time enough for perform solve the problems, such as action as described above, wherein, these problems Additionally it may operate and generate under high load due to the opening of air inlet shutter due to performing engine simultaneously of shifting gears.Such as Fruit determines that being set gearshift request identifies, then control method 500 enters 518.If it is determined that gearshift request mark is not set, then Control method 500 enters 514.In this case, control method 500 assesses other standards to predict upcoming change Gear.

At the 514 of control method 500, one or more operator's pedals are observed.For example, within the suitable duration Change more than the brake pedal position of threshold value can cause the prediction for the gearshift that will be carried out.Alternately, suitably lasting Change in time more than the accelerator pedal position of threshold value can cause the prediction for the gearshift that will start.

At the 516 of control method 500, vehicle acceleration is observed.In an example, it is high within the suitable duration The prediction for the gearshift that will be carried out can be prompted in the vehicle acceleration (deceleration) of threshold value.

At the 518 of control method 500, the humidity the inspection whether gearbox shifting that will be carried out starts at 508 is determined Occur during survey.One or more of above-described standard be may depend on to predict gearshift, wherein, above-mentioned standard can be assessed Come predict gearshift, such as, if set gearshift request mark, one of operator's pedal and/or vehicle acceleration or The observation of more persons.

Occur if it is determined that not predicting the gearshift that will be carried out during Humidity Detection, then control method 500 enters 520, at 520, complete Humidity Detection.At the 522 of control method 500, recover calibration power operation, this can include from The power operation being opened under the conditions of non-fueling recovers fuel supply and burning within the engine, and in some realities Reduce the opening of air inlet shutter in example.After recovering calibration power operation, control method 500 terminates.If it is determined that prediction is The gearshift of arrival is occurred during Humidity Detection, then control method 500 enters 524.

At the 524 of control method 500, the Humidity Detection started at 508 takes in response to the gearbox shifting of prediction Disappear.Specifically, detection humidity completion during before terminate Humidity Detection.Herein, it can exit and be selected to improve humidity inspection The opposite high load condition (engine operates with this condition) of the integrality of survey, because their discomforts share for these reasons In the gearshift that implementation will carry out.The cancellation of Humidity Detection may include the calibration for returning to the lambda sensor for being used for performing Humidity Detection Control；This can include change voltage, for example, sensor from the first relatively low reference voltage or the second higher reference voltage operate to 3rd different voltage.In some instances, the Humidity Detection of cancellation can be at it based on the appropraite condition for Humidity Detection Then occur and recover at the place of being terminated.According to this, cancellation here can refer to pause Humidity Detection, recover again afterwards.For example, due to Upcoming gearbox shifting during Humidity Detection, the Humidity Detection being partially completed can be cancelled.Complete gearshift Afterwards, it may occur in which non-fueling condition (such as DFSO) and Humidity Detection can be recovered after Humidity Detection is cancelled.First Duration, for example, the first pumping electric current for corresponding to the pass the first relatively low reference voltage operation lambda sensor can be read.Then It can shift gears, so that Humidity Detection is cancelled.With the completion of gearshift and the appearance of non-fueling condition, reading can be passed through The second pumping electric current of the second higher reference voltage operation lambda sensor is corresponded to the pass to recover Humidity Detection.As described above, Can ambient humidity be determined based on the difference between the first pumping electric current and the second pumping electric current.In another example, oxygen is operated The reference voltage of sensor can be modulated two or more times within the first duration, wherein production can be read in each modulation Raw pumping electric current.In the second duration, the pause of Humidity Detection is followed, reference voltage can be modulated twice or more again It is secondary, wherein the pumping electric current of generation, the modulation until reaching desired amt so that based on desired amt sample are all read in modulation every time The average change of this pumping electric current can be read.In another example, the dry-air pump power transmission stream of lambda sensor can be It is determined in first duration.In the second duration, with the pause of Humidity Detection, it may be determined that electric current is instantaneously pumped, And as described above, can ambient humidity be determined based on dry air and instantaneous pumping electric current.

In some instances, control method 500 can be accordingly included at 508 recover before Humidity Detection rather than Start new Humidity Detection, so as to the Humidity Detection before completing.Humidity Detection before can recovering from diagnosis termination.At it In his example, the cancellation of Humidity Detection can not suspend Humidity Detection, if for example, Humidity Detection does not complete, based on subsequent What is occurred restarts from the outset for detecting suitable condition.In this case, for example, the engine of Evaluation Environment humidity Predetermined ambient humidity can be used to compensate the cancellation of Humidity Detection in operating aspect.

At the 526 of control method 500, reduce the opening of engine charge air throttle.As previously mentioned, air inlet shutter is opened The reduction of mouth can reduce engine loading and reduce or avoid noise, vibration and sound vibration roughness and/or driveability issues, Otherwise these problems can be because of when the relatively large opening due to air inlet shutter operates engine under high loading conditions It performs gearshift and occurs.Throttle door opening can be reduced to predetermined various suitable amounts or in other examples Reduce the various suitable amounts for the gearshift for being suitable for will specifically carrying out (for example, being based on from which gear gearshift or which being shifted to A gear).

At the 528 of control method 500, engine is restarted.Restarting engine may include to recover to starting Burning of the fuel supply and recovery fuel of machine cylinder in engine cylinder.

At the 530 of control method 500, gearbox shifting is performed.It in this way, can be by reducing in expected gear Engine loading reduces or avoids noise as described above, vibration and sound vibration roughness and/or driveability issues.Perform change After fast case gearshift, control method 500 terminates.

Further, in some instances, the condition in addition to the gearbox shifting that will be carried out can also promote humidity The cancellation of detection.For example, if carrying out, not necessarily gearbox shifting can be realized, humidity can also be caused by being exited from DFSO The cancellation of detection.For example, it can be reached by sending signal, driver's oil supply, the car speed of order fuel injection to engine Threshold value, and/or engine loading reach threshold value DFSO to be promoted to exit.

In some embodiments, the result of ambient humidity detection (and/or other diagnosis) can be indicated to vehicle behaviour Author.In some instances, only when diagnosis completion, these results can just be indicated to operator.In other examples, These results can be indicated to operator based on the cancellation of diagnosis.Indication diagnosis result may include for example via one or more Dashboard indicator and/or the one or more diagnostic code transmission information of setting.

The various aspects of power operation can be based at least partially on ambient humidity.For example, engine operation parameters are (such as EGR, spark timing) can be by the influence of fluctuations of the water concentration in surrounding air, and can assess and adjust according to ambient humidity like this. In an exemplary embodiment, the amount of EGR can be adjusted based on the ambient humidity measured.For example, it in oneainstance, encloses Water concentration in the air of vehicle can due to weather condition (such as, mist increases) under the conditions of the non-fueling of engine by arranging Gas gas sensor detects higher levels of humidity.In response to increased measurement humidity, in subsequent engine fueling operation, It can be reduced into the EGR flow at least one combustion chamber.Specifically, EGR flow can be only in a combustion chamber or multiple It is increased or reduced in combustion chamber or in all combustion chambers.In addition, the size of the change of EGR flow for all cylinders and Speech can be that concrete operations condition of the size based on each cylinder of identical or EGR flow change can change.

In another embodiment, ambient humidity is may be in response to adjust spark timing.In at least one situation, for example, In response to spark timing of the higher levels of humidity reading during subsequent engine fueling operation in one or more cylinders It can be shifted to an earlier date.For example, spark timing can be planned to reduce pinking under low humidity conditions (for example, from peak torque timing Delay).When detecting humidity increase, spark timing can be advanced to keep engine performance and to be close or equal to peak value Torque spark timing operates.In addition, spark timing may be in response to the reduction of ambient humidity and be delayed by.For example, ambient humidity from The reduction of higher levels of humidity can cause pinking.If detecting that humidity reduces during non-fueling condition (such as DFSO), Spark timing can be delayed by and can reduce pinking during subsequent engine fueling operation.It should be noted that subsequent Engine fueling operation during spark in one or more cylinders can be advanced or delayed.Further, spark The size of the change of timing can be that identical or one or more cylinders can have different be advanced or delayed for all cylinders Spark size.

It, can be during subsequent engine fueling operates in response to measuring in another exemplary embodiment Ambient humidity adjust exhaust gas air-fuel ratio.It for example, can be by being grasped for the optimal dilute air-fuel ratio of low humidity Make engine.If humidity increases, mixture can be diluted, so as to cause engine fire.If however, combustion is not being filled Detect that humidity increases during material strip part, then adjustable air fuel ratio so that will be logical during subsequent fueling operation Cross diluter air-fuel ratio operation engine.Similarly, in response to the reduction of the ambient humidity measured, start in subsequent Machine fueling can adjust air-fuel ratio diluter during operating.In this way, can reduce since moisture fluctuation causes Such as engine fire situation.

In some instances, can engine be operated by the air-fuel ratio of stoichiometric(al) or dense air-fuel ratio.According to this, Air-fuel ratio can will not cause the adjusting of air-fuel ratio independently of ambient humidity and measured moisture fluctuation.

It is noted that the exemplary control included herein and program can be used in various engines and/or Vehicular system is matched somebody with somebody It puts.Control method and program disclosed herein can be stored in as executable instruction in permanent memory, and can be by wrapping The control system for including the controller combined with various sensors, actuator and other engine hardwares performs.Tool described herein Body program can represent one in event-driven, any number of processing strategy for interrupting driving, multitask, multithreading etc. It is or multiple.Exemplified multiple actions, operation and/or function can be exemplified order perform or be performed in parallel, Huo Zhe It can be omitted in some cases.Similarly, the order of processing not necessarily requires the feature and advantage for realizing example as described herein, but It is that it is provided for the purpose for being easy to example and description.One or more exemplary actions, operation and/or function can be according to being made Specific policy and be repeatedly executed at predetermined intervals.Further, it is described action, operation and/or function available chart expression can quilt The code being programmed into the permanent memory of the computer readable storage medium in vehicle control system, wherein the action passes through Instruction in execution system and be performed, wherein the system includes the various engine hardware components combined with electronic controller.

In the description of the present invention, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ", The instructions such as " thickness ", " on ", " under ", "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom " " interior ", " outer " Orientation or position relationship are based on orientation shown in the drawings or position relationship, are for only for ease of the description present invention and simplification is retouched It states rather than indicates or imply signified device or element must have specific orientation, with specific azimuth configuration and operation, Therefore it is not considered as limiting the invention.

In the present invention, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", " fixation " etc. Term should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected or be integrally connected；It can be machine Tool is connected or is electrically connected；It can be directly connected, can also be indirectly connected by intermediary, can be two members Connection inside part.For the ordinary skill in the art, above-mentioned term can be understood in this hair as the case may be Concrete meaning in bright.

In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show The description of example " or " some examples " etc. means specific features, structure, material or the spy for combining the embodiment or example description Point is contained at least one embodiment of the present invention or example.In the present specification, schematic expression of the above terms is not Centainly refer to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be any One or more embodiments or example in combine in an appropriate manner.

Although the embodiment of the present invention has been shown and described above, it is to be understood that above-described embodiment is example Property, it is impossible to limitation of the present invention is interpreted as, those of ordinary skill in the art are not departing from the principle of the present invention and objective In the case of above-described embodiment can be changed within the scope of the invention, change, replace and modification.

Claims (8)

1. a kind of control method of automatic catch automobile, which is characterized in that comprise the following steps：

When controller receives braking/assisted instruction, the cylinder of at least one engine is controlled to stop/starting work, at this time The operating load of engine increases；

Monitoring system is monitored engine speed and automobile driving speed；

Downshift/upshift of gearbox is performed according to monitoring result；

Continue the load to engine to be monitored；

When the load of the engine monitored is more than nominal load, then it represents that the gearbox jams of automobile.

2. according to the method described in claim 1, it is characterized in that, determine whether before downshift/upshift of gearbox is performed Through setting gearbox shifting request signal in the controller, the request signal indicates whether the gearbox shifting will occur.

3. it according to the method described in claim 1, is stepped on it is characterized in that, monitoring braking before downshift/upshift of gearbox is performed The position of one or both of plate and accelerator pedal.

4. according to the method described in claim 1, it is characterized in that, vehicle is monitored before downshift/upshift of gearbox is performed Acceleration.

5. according to the method described in claim 1, it is characterized in that, the controller controls the cylinder of at least one engine to stop Only/startup work is injection of the stopping/starting fluid into cylinder.

6. according to the method described in claim 1, it is characterized in that, when controller controls the cylinder of at least one engine to stop Only/when starting work, beat the air inlet shutter of engine described in opening/closing.

7. according to the method described in claim 1, it is characterized in that, when controller controls the cylinder of at least one engine to stop Only/start work when, via lambda sensor detect ambient humidity.

8. the method according to the description of claim 7 is characterized in that adjust one or more based on the ambient humidity detected A engine operation parameters.