CN108194211A - The brake control method and brake control of engine - Google Patents
The brake control method and brake control of engine Download PDFInfo
- Publication number
- CN108194211A CN108194211A CN201711458529.8A CN201711458529A CN108194211A CN 108194211 A CN108194211 A CN 108194211A CN 201711458529 A CN201711458529 A CN 201711458529A CN 108194211 A CN108194211 A CN 108194211A
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- Prior art keywords
- value
- regulating device
- engine
- admission pressure
- pressure regulating
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/0002—Controlling intake air
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/04—Introducing corrections for particular operating conditions
- F02D41/042—Introducing corrections for particular operating conditions for stopping the engine
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/04—Introducing corrections for particular operating conditions
- F02D41/12—Introducing corrections for particular operating conditions for deceleration
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/10—Parameters related to the engine output, e.g. engine torque or engine speed
- F02D2200/101—Engine speed
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valves And Accessory Devices For Braking Systems (AREA)
- Regulating Braking Force (AREA)
Abstract
The application discloses the brake control method and brake control of a kind of engine, after engine braking is opened, the tachometer value of engine is obtained according to preset strategy, after the tachometer value of engine is obtained every time, the first opening value corresponding with the tachometer value is determined according to preset first mapping relations, and the aperture of admission pressure regulating device is adjusted to the first opening value；The measured value of the first parameter of engine is obtained, determines the desired value of the first parameter corresponding with the tachometer value of engine；In the case where the measured value of the first parameter is more than the desired value of the first parameter, reduce the aperture of admission pressure regulating device according to default step-length；If the current opening value of admission pressure regulating device be greater than or equal to corresponding minimum opening value, opening value corresponding with the tachometer value in the first mapping relations is revised as the current opening value of admission pressure regulating device.Based on disclosed method, it can ensure that the braking power of engine is with uniformity.
Description
Technical field
The application belongs to the brake control method and brake control of technical field of engines more particularly to engine.
Background technology
At present, the braking control strategy for being provided with the engine of booster is：Calibration engine is under different rotating speeds in advance
Booster opening value, after engine opens braking, the current rotating speed of detection engine, according to the current rotating speed of engine
It determines the opening value of booster, and the aperture of booster is adjusted to the opening value, so as to reach the braking work of control engine
The purpose of rate.
But braking power deficiency or braking power are easily generated beyond limit value based on current braking control strategy
Problem, causing braking system, there are risks.
Invention content
In view of this, the brake control method and brake control that are designed to provide engine of the application, with solution
Certainly easily occur the problem of braking power is insufficient or braking power exceeds limit value in the prior art,
To achieve the above object, the application provides following technical solution：
The application provides a kind of brake control method of engine, and the engine includes admission pressure regulating device, institute
Admission pressure regulating device is stated for adjusting the admission pressure of the engine, the aperture of the admission pressure regulating device can
It adjusts, the brake control method includes：
After engine braking is opened, the tachometer value of the engine is obtained according to preset strategy, described in each obtain
After the tachometer value of engine, perform：
The first opening value corresponding with the tachometer value is determined according to preset first mapping relations, by the admission pressure
The aperture of regulating device is adjusted to first opening value, wherein, first mapping relations indicate admission pressure regulating device
Opening value and the engine rotating speed correspondence；
The measured value of the first parameter of the engine is obtained, determines the first ginseng corresponding with the tachometer value of the engine
Several desired values, wherein, first parameter is the admission pressure of the engine, the air inflow or described of the engine
The pressure at expulsion of engine；
Compare the measured value of first parameter and the desired value of first parameter；
In the case where the measured value of first parameter is more than the desired value of first parameter, subtract according to default step-length
The aperture of the small admission pressure regulating device；
If the current opening value of the admission pressure regulating device is greater than or equal to minimum corresponding with the tachometer value
Opening value corresponding with the tachometer value in first mapping relations is then revised as the admission pressure and adjusts dress by opening value
Put current opening value.
Optionally, in above-mentioned brake control method, reduce the admission pressure adjusting dress according to default step-length described
After the aperture put, further include：
If the current opening value of the admission pressure regulating device is less than minimum opening value corresponding with the tachometer value,
Opening value corresponding with the tachometer value in first mapping relations is then revised as the minimum opening value or is revised as
The current opening value of the admission pressure regulating device plus the default step-length and value.
Optionally, in above-mentioned brake control method, in the measured value of first parameter and described first
After the desired value of parameter, further include：
In the case where the measured value of first parameter is less than the desired value of first parameter, increase according to default step-length
The aperture of the big admission pressure regulating device；
If the current opening value of the admission pressure regulating device is less than or equal to maximum corresponding with the tachometer value
Opening value corresponding with the tachometer value in first mapping relations is then revised as the admission pressure and adjusts dress by opening value
Put current opening value.
Optionally, in above-mentioned brake control method, increase the admission pressure adjusting dress according to default step-length described
After the aperture put, further include：
If the current opening value of the admission pressure regulating device is more than maximum opening value corresponding with the tachometer value,
Opening value corresponding with the tachometer value in first mapping relations is then revised as the maximum opening value or is revised as
The current opening value of the admission pressure regulating device subtracts the difference of the default step-length.
Optionally, in above-mentioned brake control method, reduce the admission pressure adjusting dress according to default step-length described
After the aperture put, further include：If the current opening value of the admission pressure regulating device is less than corresponding with the tachometer value
Minimum opening value, then export the excessively high warning message of prompting braking power；
And/or
After the aperture for increasing the admission pressure regulating device according to default step-length, further include：It is if described
The current opening value of admission pressure regulating device is more than maximum opening value corresponding with the tachometer value, then exports prompting braking work
The too low warning message of rate.
The application also provides a kind of brake control of engine, and the engine includes admission pressure regulating device,
The admission pressure regulating device is used to adjust the admission pressure of the engine, and the aperture of the admission pressure regulating device can
It adjusts, the brake control includes：
Tachometer value acquiring unit, for after engine braking is opened, turning for the engine to be obtained according to preset strategy
Speed value；
First control unit, for obtain the engine in the tachometer value acquiring unit tachometer value after, according to pre-
If the first mapping relations determine the first opening value corresponding with the tachometer value, by the aperture of the admission pressure regulating device
It adjusts to first opening value, wherein, the opening value of first mapping relations instruction admission pressure regulating device and described
The correspondence of the rotating speed of engine；
Parameter value acquiring unit, for adjusting the aperture of the admission pressure regulating device in first control unit
Afterwards, the measured value of the first parameter of the engine is obtained, determines the first parameter corresponding with the tachometer value of the engine
Desired value, wherein, first parameter is the admission pressure of the engine, the air inflow of the engine or described is started
The pressure at expulsion of machine；
Comparing unit, for the measured value of first parameter and the desired value of first parameter；
Second control unit, for being more than the situation of the desired value of first parameter in the measured value of first parameter
Under, according to the aperture of the default step-length reduction admission pressure regulating device；
First amending unit, for reduce the admission pressure regulating device in second control unit aperture after,
It is greater than or equal to the feelings of minimum opening value corresponding with the tachometer value in the current opening value of the admission pressure regulating device
Under condition, opening value corresponding with the tachometer value in first mapping relations is revised as the admission pressure regulating device and is worked as
Preceding opening value.
Optionally, it is further included in above-mentioned brake control：
Second amending unit, for reduce the admission pressure regulating device in second control unit aperture after,
It, will in the case where the current opening value of the admission pressure regulating device is less than minimum opening value corresponding with the tachometer value
Opening value corresponding with the tachometer value is revised as the minimum opening value or is revised as described in first mapping relations
The current opening value of admission pressure regulating device plus the default step-length and value.
Optionally, it is further included in above-mentioned brake control：
Third control unit, for being less than the situation of the desired value of first parameter in the measured value of first parameter
Under, according to the aperture of the default step-length increase admission pressure regulating device；
Third amending unit, for increase the admission pressure regulating device in the third control unit aperture after,
It is less than or equal to the feelings of maximum opening value corresponding with the tachometer value in the current opening value of the admission pressure regulating device
Under condition, opening value corresponding with the tachometer value in first mapping relations is revised as the admission pressure regulating device and is worked as
Preceding opening value.
Optionally, it is further included in above-mentioned brake control：
4th amending unit, for increase the admission pressure regulating device in the third control unit aperture after,
It, will in the case where the current opening value of the admission pressure regulating device is more than maximum opening value corresponding with the tachometer value
Opening value corresponding with the tachometer value is revised as the maximum opening value or is revised as described in first mapping relations
The current opening value of admission pressure regulating device subtracts the difference of the default step-length.
Optionally, it is further included in above-mentioned brake control：
First alarm unit, for reduce the admission pressure regulating device in second control unit aperture after,
It is defeated in the case where the current opening value of the admission pressure regulating device is less than minimum opening value corresponding with the tachometer value
Go out the warning message for prompting braking power excessively high；
And/or
Second alarm unit, for increase the admission pressure regulating device in the third control unit aperture after,
It is defeated in the case where the current opening value of the admission pressure regulating device is more than maximum opening value corresponding with the tachometer value
Go out the warning message for prompting braking power too low.
It can be seen that the application's has the beneficial effect that：
The brake control method of engine disclosed in the present application after engine braking is opened, is obtained according to preset strategy
The tachometer value of engine after the tachometer value of engine is obtained every time, determines and engine according to preset first mapping relations
Corresponding first opening value of tachometer value, and the aperture of admission pressure regulating device is adjusted to first opening value, obtained later
The measured value of the first parameter of engine and the desired value of the first parameter corresponding with the tachometer value of engine are obtained, to the two
It is compared, if the measured value of the first parameter is more than the desired value of the first parameter, shows current braking power and checking cylinder
Pressure it is higher, be more than desired value, then according to default step-length reduce admission pressure regulating device aperture, so as to reduce engine
Admission pressure, and then reduce braking power and checking cylinder pressure, if the current aperture of admission pressure regulating device is more than or waits
In minimum opening value corresponding with the tachometer value of engine, then opening value corresponding with the tachometer value in the first mapping relations is repaiied
The current opening value of admission pressure regulating device is changed to, during next engine braking, is closed according to the first current mapping
System determines the aperture of admission pressure regulating device, can shorten braking stabilization time.
The brake control method and brake control of engine disclosed in the present application, during engine braking, root
According to the admission pressure of the adjustment of rotational speed engine of engine, even if the consistency of admission pressure regulating device has differences, start
The consistency of machine has differences, the air inlet pipeline of vehicle and gas exhaust piping there are consistent sex differernce, have foreign matter or block,
In the case where the admission pressure of engine is certain value, the braking power and checking cylinder pressure of engine are also maintained at certain value,
The problem of being not in excessively high and too low, ensures that the braking power of engine is with uniformity, occurs so as to reduce braking system
The possibility of risk.
Description of the drawings
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, to embodiment or it will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of application, for those of ordinary skill in the art, without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 is the flow chart of one embodiment of the brake control method of engine disclosed in the present application；
Fig. 2 is the flow chart of another embodiment of the brake control method of engine disclosed in the present application；
Fig. 3 is the flow chart of another embodiment of the brake control method of engine disclosed in the present application；
Fig. 4 is the structure chart of one embodiment of the brake control of engine disclosed in the present application；
Fig. 5 is the structure chart of another embodiment of the brake control of engine disclosed in the present application；
Fig. 6 is the structure chart of another embodiment of the brake control of engine disclosed in the present application.
Specific embodiment
For the engine of batch production, due to the limitation of processing technology, the one of the booster of the engine of same model
Cause property has differences, and the consistency of the parts of engine after processing and assembling has differences, in addition, the air inlet pipeline of vehicle
It can also be had differences, and in vehicle operation with gas exhaust piping, the air inlet pipeline and gas exhaust piping of vehicle will appear different
Object blocks, this leads to the deficiency of air of engine.These aforementioned factors can all lead to the braking power of engine
Consistency there is difference, i.e.,：In braking process, in the case where the rotating speed of multiple engines is identical, by multiple engines
Booster is adjusted to identical aperture, but the braking power of multiple engines is different.
The production firm of engine is directed to a batch of engine, can increasing of the calibration engine under different rotating speeds in advance
The opening value of depressor.Since the consistency of the braking power of engine has differences, then in braking process, according to advance mark
The opening value of booster of the fixed engine under different rotating speeds determines the aperture of the booster of engine, just easily makes
Move the problem of power is excessively high or braking power is too low.
The application discloses the brake control method and brake control of engine, can avoid the braking power of engine
It is too high or too low with checking cylinder pressure, ensure that the braking power of the engine of batch production is with uniformity, so as to reduce braking system
There is the possibility of risk in system.
What needs to be explained here is that engine disclosed in the present application includes admission pressure regulating device, the admission pressure tune
Regulating device is used to adjust the admission pressure of engine, and the aperture of admission pressure regulating device is adjustable.Specifically, the admission pressure tune
Regulating device can be booster, such as：VNT boosters, VGT boosters or the booster for being provided with electric control air-release valve.In addition,
Admission pressure regulating device can also be EGR, that is to say, that engine is the engine for being equipped with EGR.
In order to more clearly be illustrated to technical solution disclosed in the present application, here to involved special in the application
Industry term illustrates.
Engine braking：Refer to lift gas pedal, but do not depress clutch, be generated using the compression travel of engine
Resistance to compression pression, internal friction and intake and exhaust resistance form braking action to driving wheel.At this point, engine leads vehicle without forward direction
Gravitation on the contrary since vehicle wheel rotation has driven power train to drag engine, makes engine produce reaction resistance to vehicle, reaches
To the prevention increased effect of speed.
Compression release braking：Four-cycle diesel opens exhaust valve when compression stroke ends, and at this moment engine is being pressed
Work(is released to exhaust system done in air event in contracting cylinder, and expansion stroke will not have energy back pressure piston, so as to reach
To the purpose that diesel engine is made to slow down.
ECU：Also known as electronic control unit is act as：According to the program of its memory and data to air flow meter and respectively
The information of kind sensor input carries out operation, processing, judgement, then output order, and control engine component action makes to start
Machine runs well.
Air inflow：The parameter of engine, refers to the flow that extraneous fresh air enters in engine operation process, and unit is normal
It is represented with kg/h or L/min.
Middle cold pressure：The parameter of engine, air can be cooled down before entering cylinder by charge air cooler, and middle cold pressure includes
In cold preceding admission pressure and in it is cold after admission pressure, respectively into the air pressure before charge air cooler and by after charge air cooler enter hair
The air pressure of the air inlet pipe of motivation, unit are often represented with kPa.
Admission pressure：The parameter of engine refers to that, into the air pressure before the cylinder acting of engine, unit is commonly used
KPa represents, after referring to charge air cooler in the application, into the air pressure in air inlet pipe.
Turbocharger：The indoor turbine of turbine is pushed using the discarded inertia impulsive force of engine discharge, turbine drives
Coaxial impeller, the air that impeller force feed is sent by air cleaner pipeline are allowed to supercharging into the device of cylinder.
VNT boosters：English full name is variable nozzle turbine, is one kind of turbocharger, in air inlet
Side is equipped with guide vane, the position variable of guide vane, so as to be provided most in entire engine speed range
Good flow velocity and very high efficiency of turbocharger.By controlling the aperture of guide vane, the adjustable air-flow into turbocharger,
Adjust pressure.
VGT boosters：English full name be Variable geometry turbocharger, variable cross section turbocharging
Device.
EGR：English full name is Exhaust Gas Recirculation, and exhaust gas recycling system can produce engine
A part for raw exhaust is re-fed into cylinder.
Braking power：Refer in braking process, the braking work that component is done within the unit interval, unit is often represented with kW.
Signified braking power is in the application：The braking power exported in engine operation process.
Checking cylinder pressure：The power that unit area generates in cylinder during engine braking, unit are often represented with MPa.
Valve clearance：In the cold state, when valve is closed, the gap between valve and driving member claims engine
For valve clearance.Due to the elongation of parts expanded by heating when purpose is compensation engine work.
Below in conjunction with the attached drawing in the embodiment of the present application, the technical solution in the embodiment of the present application is carried out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of embodiments of the present application, instead of all the embodiments.It is based on
Embodiment in the application, those of ordinary skill in the art are obtained every other without making creative work
Embodiment shall fall in the protection scope of this application.
Referring to Fig. 1, Fig. 1 is a flow chart of the brake control method of engine disclosed in the present application.The control for brake
Method includes：
Step S101：After engine braking is opened, the tachometer value of engine is obtained according to preset strategy.
During engine braking, the tachometer value of engine is obtained according to preset strategy, is obtaining engine every time
After tachometer value, it is performed both by following step.In implementation, the tachometer value of engine can be obtained according to preset time interval.
Step S102：The first opening value corresponding with the tachometer value of engine is determined according to preset first mapping relations,
The aperture of admission pressure regulating device is adjusted to the first opening value.Wherein, the first mapping relations instruction admission pressure adjusts dress
The opening value and the correspondence of the rotating speed of engine put.
After the tachometer value for obtaining engine, turn current with engine is can determine by inquiring first mapping relations
Speed is worth corresponding opening value, for ease of description, which is denoted as the first opening value, by opening for admission pressure regulating device
Degree is adjusted to the first opening value.
Table 1 shows an example of the first mapping relations.
Table 1
Step S103：The measured value of the first parameter of engine is obtained, determines corresponding with the tachometer value of engine first
The desired value of parameter.Wherein, the first parameter is admission pressure, the air inflow of engine or the exhaust pressure of engine of engine
Power.
The aperture of the admission pressure of engine, braking power and checking cylinder pressure and admission pressure regulating device is into certain line
Sexual intercourse.In the case where the rotating speed of engine is certain, if the aperture of admission pressure regulating device is larger, then engine
Admission pressure, braking power and checking cylinder pressure are also larger, if correspondingly, the aperture of admission pressure regulating device is smaller, then
The admission pressure of engine, braking power and checking cylinder pressure are also smaller.
Applicant has found during experiment：During engine braking, under same rotational speed, if the air inlet of engine
Pressure is certain certain value, then the braking power and checking cylinder pressure of engine can also maintain certain certain value.So, in engine
In braking process, even if the consistency of admission pressure regulating device has differences, the consistency of engine has differences, vehicle
Air inlet pipeline and gas exhaust piping there are consistent sex differernce, have foreign matter or block, as long as will be sent out according to the rotating speed of engine
The admission pressure of motivation is adjusted to certain certain value, you can ensures that the braking power of engine and checking cylinder pressure maintain certain centainly
Value, can avoid the occurrence of the braking power of engine and checking cylinder presses through the problem of high or too low.
It is adjusted by the aperture of admission pressure regulating device to the first opening value, obtains the reality of the admission pressure of engine
Measured value determines the desired value of admission pressure corresponding with the tachometer value of engine, alternatively, obtaining the actual measurement of the air inflow of engine
Value determines the desired value of air inflow corresponding with the tachometer value of engine, alternatively, obtaining the actual measurement of the pressure at expulsion of engine
Value determines the desired value of pressure at expulsion corresponding with the tachometer value of engine.
In implementation, the desired value of the first parameter of engine and the mapping relations of the rotating speed of engine can be preset,
It is that can determine the desired value of the first parameter corresponding with the tachometer value of engine according to the mapping relations.
Here by taking the first parameter is the admission pressure of engine as an example, table 2 for engine admission pressure desired value with
One example of the mapping relations of the tachometer value of engine.
Table 2
Step S104：Compare the measured value of the first parameter and the desired value of the first parameter.
Step S105：In the case where the measured value of the first parameter is more than the desired value of the first parameter, according to default step-length
Reduce the aperture of admission pressure regulating device.
Step S106：If the current opening value of admission pressure regulating device is greater than or equal to the tachometer value pair with engine
Opening value corresponding with the tachometer value of engine in first mapping relations is then revised as admission pressure tune by the minimum opening value answered
The current opening value of regulating device.
If the measured value of the first parameter is more than the desired value of the first parameter, show the current admission pressure of engine, system
Dynamic power and checking cylinder pressure are all higher than desired value, it is therefore desirable to reduce the aperture of admission pressure regulating device.In the application, according to
Default step-length reduces the aperture of admission pressure regulating device.After step S105 is performed, if admission pressure regulating device is worked as
Preceding opening value is more than or equal to minimum opening value corresponding with the tachometer value of engine, then, it will be in the first mapping relations
Opening value corresponding with the tachometer value that engine is current is revised as the current opening value of admission pressure regulating device.It is sent out next time
During motivation braking, air inlet is determined according to current the first mapping relations (the first mapping relations after being namely adjusted)
The aperture of pressure-regulating device.
During engine braking, if reaching scheduled system in the case where the aperture of admission pressure regulating device is too small
Dynamic power can cause piston to touch valve, cause danger since brake clearance is too small.Therefore, for the different rotating speeds of engine,
The minimum opening value of admission pressure regulating device is set respectively.
In implementation, the mapping that can preset the rotating speed of engine and the minimum opening value of admission pressure regulating device is closed
System is that can determine the minimum opening value of admission pressure regulating device corresponding with the tachometer value of engine according to the mapping relations.
Table 3 is the rotating speed of engine and an example of the mapping relations of the minimum opening value of admission pressure regulating device.
Table 3
The brake control method of engine disclosed in the present application after engine braking is opened, is obtained according to preset strategy
The tachometer value of engine after the tachometer value of engine is obtained every time, determines and engine according to preset first mapping relations
Corresponding first opening value of tachometer value, and the aperture of admission pressure regulating device is adjusted to first opening value, obtained later
The measured value of the first parameter of engine and the desired value of the first parameter corresponding with the tachometer value of engine are obtained, to the two
It is compared, if the measured value of the first parameter is more than the desired value of the first parameter, shows current braking power and checking cylinder
Pressure it is higher, be more than desired value, then according to default step-length reduce admission pressure regulating device aperture, so as to reduce engine
Admission pressure, and then reduce braking power and checking cylinder pressure, if the current aperture of admission pressure regulating device is more than or waits
In minimum opening value corresponding with the tachometer value of engine, then opening value corresponding with the tachometer value in the first mapping relations is repaiied
The current opening value of admission pressure regulating device is changed to, during next engine braking, is closed according to the first current mapping
System determines the aperture of admission pressure regulating device, can shorten braking stabilization time.
The brake control method of engine disclosed in the present application, during engine braking, according to the rotating speed of engine
The admission pressure of engine is adjusted, in the case where the admission pressure of engine is certain value, even if admission pressure regulating device
Consistency have differences, the consistency of engine has differences, and the air inlet pipeline and gas exhaust piping of vehicle are poor there are consistency
It is different, have foreign matter or block, the braking power and checking cylinder pressure of engine are also maintained at certain value, be not in it is excessively high and
The problem of too low, ensures that the braking power of engine is with uniformity, the possibility of risk occurs so as to reduce braking system.
Referring to Fig. 2, Fig. 2 is the flow chart of another embodiment of the brake control method of engine disclosed in the present application.
Compared with brake control method shown in Fig. 1, further included after step S105：
Step S107：If the current opening value of admission pressure regulating device be less than it is corresponding with the tachometer value of engine most
Opening value corresponding with the tachometer value of engine in first mapping relations is then revised as minimum opening value by small guide vane value.
That is, after step S105 is performed, if the current opening value of admission pressure regulating device is less than and hair
The corresponding minimum opening value of the current rotating speed of motivation, then by aperture corresponding with the tachometer value that engine is current in the first relationship
Value is revised as the minimum opening value, so as to avoid the aperture of admission pressure regulating device is too small from causing danger.
In implementation, step S107 may be replaced by：If the current opening value of admission pressure regulating device is less than and hair
The corresponding minimum opening value of tachometer value of motivation, then repair opening value corresponding with the tachometer value of engine in the first mapping relations
Be changed to the current opening value of admission pressure regulating device plus default step-length and value.Based on which, air inlet can be also avoided
The aperture of pressure-regulating device is too small to cause danger.
Referring to Fig. 3, Fig. 3 is the flow chart of another embodiment of the brake control method of engine disclosed in the present application.
Compared with brake control method shown in Fig. 2, further include after step s 104：
Step S108：In the case where the measured value of the first parameter is less than the desired value of the first parameter, according to default step-length
Increase the aperture of admission pressure regulating device.
Step S109：If the current opening value of admission pressure regulating device is less than or equal to the tachometer value pair with engine
Opening value corresponding with the tachometer value in first mapping relations is then revised as admission pressure regulating device by the maximum opening value answered
Current opening value.
Step S110：If the current opening value of admission pressure regulating device be more than it is corresponding with the tachometer value of engine most
Opening value corresponding with the tachometer value of engine in first mapping relations is then revised as the maximum opening value by big opening value.
In implementation, step S110 may be replaced by：If the current opening value of admission pressure regulating device is more than and hair
The corresponding maximum opening value of tachometer value of motivation, then repair opening value corresponding with the tachometer value of engine in the first mapping relations
It is changed to the difference that the current opening value of admission pressure regulating device subtracts default step-length.
If the measured value of the first parameter is less than the desired value of the first parameter, show the current admission pressure of engine, system
Dynamic power and checking cylinder pressure are below desired value, it is therefore desirable to increase the aperture of admission pressure regulating device.In the application, according to
Default step-length increases the aperture of admission pressure regulating device.
After step S108 is performed, if the current opening value of admission pressure regulating device is less than or equal to and engine
The corresponding maximum opening value of tachometer value, then, by aperture corresponding with the tachometer value that engine is current in the first mapping relations
Value is revised as the current opening value of admission pressure regulating device.
After step S108 is performed, if the current opening value of admission pressure regulating device is more than the rotating speed with engine
Corresponding maximum opening value, then opening value corresponding with the tachometer value that engine is current in the first relationship is revised as the maximum
Opening value is revised as the difference that the current opening value of admission pressure regulating device subtracts default step-length, so as to avoid air inlet
The aperture of pressure-regulating device is excessive to cause danger.
During engine braking next time, according to current the first mapping relations (after being namely adjusted
One mapping relations) determine the aperture of admission pressure regulating device.
During engine braking, in the case of low engine speeds, if the aperture mistake of admission pressure regulating device
Greatly, admission pressure regulating device can be caused surge occur.If in addition, in the excessive situation of the aperture of admission pressure regulating device
Under reach scheduled braking power, can cause checking cylinder pressure increase be even more than limiting design value, the load that valve actuating mechanism is born
It can increase, push rod bending, camshaft peach point and tappet abrasion may be caused.Therefore, it for the different rotating speeds of engine, sets respectively
Put the maximum opening value of admission pressure regulating device.
In implementation, the mapping that can preset the rotating speed of engine and the maximum opening value of admission pressure regulating device is closed
System is that can determine the maximum opening value of admission pressure regulating device corresponding with the tachometer value of engine according to the mapping relations.
Table 4 is the rotating speed of engine and an example of the mapping relations of the maximum opening value of admission pressure regulating device.
Table 4
The brake control method of the application engine shown in Fig. 3, if the measured value of the first parameter is less than the first parameter
Desired value, show current braking power and checking cylinder pressure it is relatively low, then according to default step-length increase admission pressure adjust dress
The aperture put so as to increase the admission pressure of engine, and then increases braking power and checking cylinder pressure, if admission pressure is adjusted
The current aperture of device be less than or equal to maximum opening value corresponding with the tachometer value of engine, then by the first mapping relations with
The corresponding opening value of the tachometer value is revised as the current opening value of admission pressure regulating device, if admission pressure regulating device is worked as
Preceding aperture is more than maximum opening value corresponding with the tachometer value of engine, then will be corresponding with the tachometer value in the first mapping relations
Opening value be revised as the difference that current opening value after the maximum opening value or modification subtracts default step-length, start in next time
During mechanism is moved, the aperture of admission pressure regulating device is determined according to the first current mapping relations, it is steady that braking can be shortened
It fixes time.
It should be noted that in the brake control method of engine disclosed in the present application, after step S104 is performed,
If the measured value of the first parameter is equal to the desired value of the first parameter, then the first mapping relations is not adjusted.
Optionally, in the brake control method of the application engine disclosed above, according to default step-length reduce into
After the aperture of air pressure apparatus for adjusting force, further include：If the current opening value of admission pressure regulating device is less than and engine
The corresponding minimum opening value of tachometer value, then export the excessively high warning message of prompting braking power.
Optionally, in the brake control method of the application engine disclosed above, according to default step-length increase into
After the aperture of air pressure apparatus for adjusting force, further include：If the current opening value of admission pressure regulating device is more than and engine
The corresponding maximum opening value of tachometer value, then export the too low warning message of prompting braking power.
The application brake control method of engine disclosed above, correspondingly, the braking of engine is also disclosed in the application
Control device.Description hereinafter with regard to brake control and the description above in connection with brake control method, can be mutual
Referring to.
Referring to Fig. 4, Fig. 4 is the structure chart of one embodiment of the brake control of engine disclosed in the present application, should
Brake control includes：
Tachometer value acquiring unit 401, for after engine braking is opened, the rotating speed of engine to be obtained according to preset strategy
Value.
First control unit 402, for obtain engine in tachometer value acquiring unit 401 tachometer value after, according to default
The first mapping relations determine the first opening value corresponding with the tachometer value of engine, by the aperture tune of admission pressure regulating device
It is whole to the first opening value.Wherein, the rotating speed of the opening value of the first mapping relations instruction admission pressure regulating device and engine
Correspondence.
Parameter value acquiring unit 403, for the first control unit 402 adjustment admission pressure regulating device aperture after,
The measured value of the first parameter of engine is obtained, determines the desired value of the first parameter corresponding with the tachometer value of engine.Wherein,
First parameter is admission pressure, the air inflow of engine or the pressure at expulsion of engine of engine.
Comparing unit 404, for comparing the desired value of the measured value of the first parameter and the first parameter.
Second control unit 405 in the case of being more than the desired value of the first parameter in the measured value of the first parameter, is pressed
Reduce the aperture of admission pressure regulating device according to default step-length.
First amending unit 406, for the second control unit 405 reduce admission pressure regulating device aperture after,
The current opening value of admission pressure regulating device is greater than or equal to the situation of minimum opening value corresponding with the tachometer value of engine
Under, opening value corresponding with the tachometer value of engine in the first mapping relations is revised as to admission pressure regulating device is current to be opened
Angle value.
Second amending unit 407, for the second control unit 405 reduce admission pressure regulating device aperture after,
In the case that the current opening value of admission pressure regulating device is less than minimum opening value corresponding with the tachometer value of engine, by the
Opening value corresponding with the tachometer value of engine is revised as minimum opening value or is revised as admission pressure tune in one mapping relations
The current opening value of regulating device plus default step-length and value.
Referring to Fig. 5, Fig. 5 is the structure chart of one embodiment of the brake control of engine disclosed in the present application, with
Brake control shown in Fig. 4 is compared, and is further included：
Third control unit 408 in the case of being less than the desired value of the first parameter in the measured value of the first parameter, is pressed
According to the aperture of default step-length increase admission pressure regulating device.
Third amending unit 409, for third control unit 408 increase admission pressure regulating device aperture after,
The current opening value of admission pressure regulating device is less than or equal to the situation of maximum opening value corresponding with the tachometer value of engine
Under, opening value corresponding with the tachometer value of engine in the first mapping relations is revised as to admission pressure regulating device is current to be opened
Angle value.
4th amending unit 410, for third control unit 408 increase admission pressure regulating device aperture after,
In the case that the current opening value of admission pressure regulating device is more than maximum opening value corresponding with the tachometer value of engine, by the
Opening value corresponding with the tachometer value of engine is revised as the maximum opening value or is revised as admission pressure in one mapping relations
The current opening value of regulating device subtracts the difference of default step-length.
Referring to Fig. 6, Fig. 6 is the structure chart of one embodiment of the brake control of engine disclosed in the present application, with
Brake control shown in fig. 5 is compared, and further includes the first alarm unit 411 and/or the second alarm unit 412.
First alarm unit 411, for the second control unit 405 reduce admission pressure regulating device aperture after,
In the case that the current opening value of admission pressure regulating device is less than minimum opening value corresponding with tachometer value, output prompting braking
The excessively high warning message of power.
Second alarm unit 412, for third control unit 408 increase admission pressure regulating device aperture after,
In the case that the current opening value of admission pressure regulating device is more than maximum opening value corresponding with tachometer value, output prompting braking
The too low warning message of power.
Finally, it is to be noted that, herein, relational terms such as first and second and the like be used merely to by
One entity or operation are distinguished with another entity or operation, without necessarily requiring or implying these entities or operation
Between there are any actual relationship or orders.Moreover, term " comprising ", "comprising" or its any other variant meaning
Covering non-exclusive inclusion, so that process, method, article or equipment including a series of elements not only include that
A little elements, but also including other elements that are not explicitly listed or further include for this process, method, article or
The intrinsic element of equipment.In the absence of more restrictions, the element limited by sentence "including a ...", is not arranged
Except also there are other identical elements in the process, method, article or apparatus that includes the element.
Each embodiment is described by the way of progressive in this specification, the highlights of each of the examples are with other
The difference of embodiment, just to refer each other for identical similar portion between each embodiment.For braking disclosed in embodiment
For control device, due to its with embodiment disclosed in brake control method it is corresponding, so description is fairly simple, correlation
Place is referring to method part illustration.
The foregoing description of the disclosed embodiments enables professional and technical personnel in the field to realize or using the application.
A variety of modifications of these embodiments will be apparent for those skilled in the art, it is as defined herein
General Principle can in other embodiments be realized in the case where not departing from spirit herein or range.Therefore, the application
The embodiments shown herein is not intended to be limited to, and is to fit to and the principles and novel features disclosed herein phase one
The most wide range caused.
Claims (10)
1. a kind of brake control method of engine, which is characterized in that the engine includes admission pressure regulating device, described
Admission pressure regulating device is used to adjust the admission pressure of the engine, and the aperture of the admission pressure regulating device is adjustable,
The brake control method includes：
After engine braking is opened, the tachometer value of the engine is obtained according to preset strategy, is started described in each obtain
After the tachometer value of machine, perform：
The first opening value corresponding with the tachometer value is determined according to preset first mapping relations, and the admission pressure is adjusted
The aperture of device is adjusted to first opening value, wherein, the first mapping relations instruction admission pressure regulating device is opened
The correspondence of the rotating speed of angle value and the engine；
The measured value of the first parameter of the engine is obtained, determines the first parameter corresponding with the tachometer value of the engine
Desired value, wherein, first parameter is the admission pressure of the engine, the air inflow of the engine or described is started
The pressure at expulsion of machine；
Compare the measured value of first parameter and the desired value of first parameter；
In the case where the measured value of first parameter is more than the desired value of first parameter, reduce institute according to default step-length
State the aperture of admission pressure regulating device；
If the current opening value of the admission pressure regulating device is greater than or equal to minimum aperture corresponding with the tachometer value
Opening value corresponding with the tachometer value in first mapping relations is then revised as the admission pressure regulating device and worked as by value
Preceding opening value.
2. brake control method according to claim 1, which is characterized in that it is described according to default step-length reduce it is described into
After the aperture of air pressure apparatus for adjusting force, further include：
If the current opening value of the admission pressure regulating device is less than minimum opening value corresponding with the tachometer value, will
Opening value corresponding with the tachometer value is revised as the minimum opening value or is revised as described in first mapping relations
The current opening value of admission pressure regulating device plus the default step-length and value.
3. brake control method according to claim 2, which is characterized in that in the actual measurement of first parameter
After the desired value of value and first parameter, further include：
In the case where the measured value of first parameter is less than the desired value of first parameter, increase institute according to default step-length
State the aperture of admission pressure regulating device；
If the current opening value of the admission pressure regulating device is less than or equal to maximum opening corresponding with the tachometer value
Opening value corresponding with the tachometer value in first mapping relations is then revised as the admission pressure regulating device and worked as by value
Preceding opening value.
4. brake control method according to claim 3, which is characterized in that it is described according to default step-length increase it is described into
After the aperture of air pressure apparatus for adjusting force, further include：
It, will if the current opening value of the admission pressure regulating device is more than maximum opening value corresponding with the tachometer value
Opening value corresponding with the tachometer value is revised as the maximum opening value or is revised as described in first mapping relations
The current opening value of admission pressure regulating device subtracts the difference of the default step-length.
5. brake control method according to claim 4, which is characterized in that
After the aperture for reducing the admission pressure regulating device according to default step-length, further include：If the air inlet
The current opening value of pressure-regulating device is less than minimum opening value corresponding with the tachometer value, then exports prompting braking power mistake
High warning message；
And/or
After the aperture for increasing the admission pressure regulating device according to default step-length, further include：If the air inlet
The current opening value of pressure-regulating device is more than maximum opening value corresponding with the tachometer value, then exports prompting braking power mistake
Low warning message.
6. a kind of brake control of engine, which is characterized in that the engine includes admission pressure regulating device, described
Admission pressure regulating device is used to adjust the admission pressure of the engine, and the aperture of the admission pressure regulating device is adjustable,
The brake control includes：
Tachometer value acquiring unit, for after engine braking is opened, the tachometer value of the engine to be obtained according to preset strategy；
First control unit, for obtain the engine in the tachometer value acquiring unit tachometer value after, according to preset
First mapping relations determine the first opening value corresponding with the tachometer value, and the aperture of the admission pressure regulating device is adjusted
To first opening value, wherein, the opening value of the first mapping relations instruction admission pressure regulating device and described start
The correspondence of the rotating speed of machine；
Parameter value acquiring unit, for after the aperture of first control unit adjustment admission pressure regulating device, obtaining
The measured value of the first parameter of the engine is obtained, determines the target of the first parameter corresponding with the tachometer value of the engine
Value, wherein, first parameter is the admission pressure of the engine, the air inflow of the engine or the engine
Pressure at expulsion；
Comparing unit, for the measured value of first parameter and the desired value of first parameter；
Second control unit, in the case of being more than the desired value of first parameter in the measured value of first parameter,
Reduce the aperture of the admission pressure regulating device according to default step-length；
First amending unit, for reduce the admission pressure regulating device in second control unit aperture after, in institute
In the case of the current opening value of admission pressure regulating device is stated more than or equal to minimum opening value corresponding with the tachometer value,
It is current that opening value corresponding with the tachometer value in first mapping relations is revised as the admission pressure regulating device
Opening value.
7. brake control according to claim 6, which is characterized in that further include：
Second amending unit, for reduce the admission pressure regulating device in second control unit aperture after, in institute
In the case of the current opening value of admission pressure regulating device is stated less than minimum opening value corresponding with the tachometer value, by described in
Opening value corresponding with the tachometer value is revised as the minimum opening value or is revised as the air inlet in first mapping relations
The current opening value of pressure-regulating device plus the default step-length and value.
8. brake control according to claim 7, which is characterized in that further include：
Third control unit, in the case of being less than the desired value of first parameter in the measured value of first parameter,
Increase the aperture of the admission pressure regulating device according to default step-length；
Third amending unit, for increase the admission pressure regulating device in the third control unit aperture after, in institute
The current opening value of admission pressure regulating device is stated less than or equal in the case of maximum opening value corresponding with the tachometer value,
It is current that opening value corresponding with the tachometer value in first mapping relations is revised as the admission pressure regulating device
Opening value.
9. brake control according to claim 8, which is characterized in that further include：
4th amending unit, for increase the admission pressure regulating device in the third control unit aperture after, in institute
The current opening value of admission pressure regulating device is stated more than in the case of maximum opening value corresponding with the tachometer value, will described in
Opening value corresponding with the tachometer value is revised as the maximum opening value or is revised as the air inlet in first mapping relations
The current opening value of pressure-regulating device subtracts the difference of the default step-length.
10. brake control according to claim 9, which is characterized in that further include：
First alarm unit, for reduce the admission pressure regulating device in second control unit aperture after, in institute
In the case of the current opening value of admission pressure regulating device is stated less than minimum opening value corresponding with the tachometer value, output carries
Show the excessively high warning message of braking power；
And/or
Second alarm unit, for increase the admission pressure regulating device in the third control unit aperture after, in institute
The current opening value of admission pressure regulating device is stated more than in the case of maximum opening value corresponding with the tachometer value, output carries
Show the too low warning message of braking power.
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| CN201711458529.8A CN108194211B (en) | 2017-12-28 | 2017-12-28 | Engine brake control method and brake control device |
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|---|---|---|---|
| CN201711458529.8A CN108194211B (en) | 2017-12-28 | 2017-12-28 | Engine brake control method and brake control device |
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| CN108194211B CN108194211B (en) | 2020-06-26 |
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| CN110630375A (en) * | 2019-09-30 | 2019-12-31 | 潍柴动力股份有限公司 | Engine braking power control method and system |
| CN113047966A (en) * | 2021-03-04 | 2021-06-29 | 广西玉柴机器股份有限公司 | Method and system for adjusting braking power in engine cylinder and related device |
| CN115234362A (en) * | 2022-08-09 | 2022-10-25 | 长城汽车股份有限公司 | Engine safety control method and device, vehicle and storage medium |
| CN115288821A (en) * | 2022-07-25 | 2022-11-04 | 潍柴动力股份有限公司 | Valve clearance adjusting and monitoring method and device, electronic equipment and storage medium |
| CN116877287A (en) * | 2023-09-08 | 2023-10-13 | 潍柴动力股份有限公司 | Engine brake control method, engine brake control device and engine brake system |
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| CN115234362A (en) * | 2022-08-09 | 2022-10-25 | 长城汽车股份有限公司 | Engine safety control method and device, vehicle and storage medium |
| CN115234362B (en) * | 2022-08-09 | 2024-06-28 | 长城汽车股份有限公司 | Engine safety control method and device, vehicle and storage medium |
| CN116877287A (en) * | 2023-09-08 | 2023-10-13 | 潍柴动力股份有限公司 | Engine brake control method, engine brake control device and engine brake system |
| CN116877287B (en) * | 2023-09-08 | 2023-12-15 | 潍柴动力股份有限公司 | Engine brake control method, engine brake control device and engine brake system |
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