CN109895758A - A kind of hybrid electric vehicle engine torque control method, system and vehicle - Google Patents
A kind of hybrid electric vehicle engine torque control method, system and vehicle Download PDFInfo
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Abstract
The present invention provides a kind of hybrid electric vehicle engine torque control methods, system and vehicle, engine Injection Control based on torque passes through operator demand's torque map based on gas pedal aperture and engine speed, obtain the demand torque of driver, motor Power assisted control passes through the motor booster torquemoment map based on SOC value of battery and motor speed, obtain motor booster torquemoment value, it goes up a slope in vehicle start acceleration or high speed and anxious acceleration overtakes other vehicles and waits significant power demands operating condition, pass through the increase of motor booster torquemoment value, reduce the actual torque output of engine, finally obtain true operator demand's torque, the distributive value of engine is obtained by torque and distributive value map, vehicle start, which is reduced, by the power-assisted of motor accelerates or tell upward slope and the anxious torque output for accelerating significant power demands operating conditions such as overtaking other vehicles and distributive value, it is real The purpose of existing fuel-economizing, guarantees the stable operation of vehicle.
Description
Technical field
The invention belongs to hybrid vehicle control technology field, in particular to a kind of hybrid electric vehicle engine torque
Control method, system and vehicle.
Background technique
As the problems such as global energy is in short supply and automobile emission environmental pollution gets worse, low energy consumption, low is promoted
The new-energy automobile of discharge has become the common recognition of all circles, and current " heavy-duty commercial vehicle fuel consumption limit value " phase III standard is
It will issue, wherein using " the year two thousand twenty fuel consumption limit value on the basis of 2015 adds tight about 15% " as overall energy conservation object.
If phase III standard is implemented, there is important meaning to China environmental protection, energy-saving and emission-reduction and commercial vehicle industry development.But
It is, it is contemplated that the development trend of heavy-duty commercial vehicle power-saving technology at present, traditional technology means have been unable to satisfy the limitation standard, especially
It is the purposes vehicle such as passenger traffic, tourism.Therefore the high highway car hybrid power system of design cost performance is considered, with maximized real
Existing oil-saving effect is simultaneously promoted and applied.
Currently, the control method for having there are many schemes to solve hybrid vehicle motor power-assisted, such as Publication No.
" CN103303301A ", it is entitled " a kind of hybrid vehicle method for optimizing assistant force of accelerating condition motor ", what which provided
The step of hybrid vehicle method for optimizing assistant force of accelerating condition motor, is, according to engine test bench characteristic torque value, transmission system
Input terminal torque limit value determines transmission system motor power torque limits value；Be arranged timer and between triggering and reset in terms of
Duration, accelerator pedal aperture look into motor characteristic time attenuation characteristic map and determine motor power torque time attenuation coefficient；According to
Shift mode, accelerator pedal aperture look into motor power-assisted rate of load condensate map and determine motor power-assisted rate of load condensate；Electric machine controller is real-time
The motor torque limits value and power battery of feedback are set as electric drive system motor to minimum value in motor driven torque limit value and help
Power torque limit value；By minimum value in transmission system motor power torque limits value and electric drive system motor power torque limits value
It is multiplied with motor power torque time attenuation coefficient and motor power-assisted rate of load condensate, obtains motor power-assisted demand torque value.
But the scheme that the patent provides does not consider between hybrid power system and engine Injection Control based on torque
Cooperation, since for the hybrid power system of public transport and group's purposes, engine is small compared to traditional vehicle discharge capacity at present, and
For the hybrid power system of the purposes such as highway car such as passenger traffic, tourism, discharge capacity is substantially unchanged, it is contemplated that motor power-assisted will be made
At the too strong problem of power, if therefore not by the engine Injection Control based on torque and the motor Power assisted control based on motor speed
Combine, the problem that vehicle oil-saving effect will be caused bad.
Summary of the invention
The purpose of the present invention is to provide a kind of hybrid electric vehicle engine torque control method, system and vehicles, use
The engine Injection Control based on torque and the motor Power assisted control based on motor speed are not combined in the prior art in solution
Get up to cause the bad problem of hybrid vehicle oil-saving effect.
To achieve the above object, the present invention provides a kind of hybrid electric vehicle engine torque control methods, including with
Lower technical solution:
A kind of method scheme one, hybrid electric vehicle engine torque control method, includes the following steps:
1) speed, gas pedal aperture and engine speed are acquired, if speed judges oil less than the first speed setting value
Whether door pedal opening is greater than or equal to aperture setting value, if gas pedal aperture is greater than or equal to aperture setting value, judges
Whether engine speed is less than or equal to speed setting value；If speed is greater than the second speed setting value, the first speed setting value
Less than the second speed setting value, then judge whether gas pedal aperture change rate is greater than aperture change rate setting value；
If 2) engine speed is less than or equal to the speed setting value or gas pedal aperture change rate and is greater than etc.
In aperture change rate setting value, then motor booster torquemoment value is obtained according to battery charge state；
3) final engine demand torque value is determined according to the motor booster torquemoment value and engine demand torque value.
Method scheme two, on the basis of method scheme one, the engine demand torque value by engine speed with
The gas pedal aperture corresponding operator demand's torque map obtains.
Method scheme three, method scheme four are obtaining motor respectively on the basis of method scheme one or method scheme two
Before booster torquemoment value, it need to guarantee that battery charge state value is more than or equal to battery charge state setting value.
Method scheme five, on the basis of method scheme two, the final engine demand torque value is described starts
Machine demand torque value subtracts the difference of the motor booster torquemoment value.
Method scheme six, on the basis of method scheme five, after getting final engine demand torque value, according to institute
Final engine demand torque value and distributive value map are stated, determines the distributive value of engine.
The present invention also provides a kind of hybrid electric vehicle engine torque control systems, including following technical scheme:
It system schema one, a kind of hybrid electric vehicle engine torque control system, including memory, controller and deposits
Computer program when storing up on a memory and can run on the controller, the controller are realized following when executing described program
Step:
(1) speed, gas pedal aperture and engine speed are acquired, if speed judges less than the first speed setting value
Whether gas pedal aperture is greater than or equal to aperture setting value, if gas pedal aperture is greater than or equal to aperture setting value, sentences
Whether disconnected engine speed is less than or equal to speed setting value；If speed is greater than the second speed setting value, the first speed setting
Value is less than the second speed setting value, then judges whether gas pedal aperture change rate is greater than aperture change rate setting value；
(2) if the engine speed is greater than less than or equal to the speed setting value or gas pedal aperture change rate etc.
In aperture change rate setting value, then motor booster torquemoment value is obtained according to battery charge state；
(3) final engine demand torque is determined according to the motor booster torquemoment value and engine demand torque value
Value.
System schema two, on the basis of system schema one, the engine demand torque value by engine speed with
The gas pedal aperture corresponding operator demand's torque map obtains.
System schema three, system schema four are obtaining motor respectively on the basis of system schema one or system schema two
Before booster torquemoment value, it need to guarantee that battery charge state value is more than or equal to battery charge state setting value.
System schema five, on the basis of system schema two, the final engine demand torque value is described starts
Machine demand torque value subtracts the difference of the motor booster torquemoment value.
System schema six, on the basis of system schema five, after getting final engine demand torque value, according to institute
Final engine demand torque value and distributive value map are stated, determines the distributive value of engine.
The present invention also provides a kind of vehicles, including following technical scheme:
Vehicle scheme one, a kind of vehicle, including engine, generator, vehicle speed sensor, gas pedal jaw opening sensor,
Engine speed sensor and entire car controller, the entire car controller is for acquiring speed, gas pedal aperture and engine
Revolving speed, if speed judges whether gas pedal aperture is greater than or equal to aperture setting value less than the first speed setting value, if oily
Door pedal opening is greater than or equal to aperture setting value, then judges whether engine speed is less than or equal to speed setting value；If speed
Greater than the second speed setting value, the first speed setting value is less than the second speed setting value, then judges that gas pedal is opened
Whether degree change rate is greater than aperture change rate setting value；If it is described that entire car controller judges that the engine speed is less than or equal to
Speed setting value or gas pedal aperture change rate are more than or equal to aperture change rate setting value, then are obtained according to battery charge state
Take motor booster torquemoment value；And the entire car controller is determined according to the motor booster torquemoment value and engine demand torque value
Final engine demand torque value.
Vehicle scheme two, on the basis of vehicle scheme one, the engine demand torque value by engine speed with
The gas pedal aperture corresponding operator demand's torque map obtains.
Vehicle scheme three, vehicle scheme four are obtaining motor respectively on the basis of vehicle scheme one or vehicle scheme two
Before booster torquemoment value, it need to guarantee that battery charge state value is more than or equal to battery charge state setting value.
Vehicle scheme five, on the basis of vehicle scheme two, the final engine demand torque value is described starts
Machine demand torque value subtracts the difference of the motor booster torquemoment value.
Vehicle scheme six, on the basis of vehicle scheme five, after getting final engine demand torque value, controller
According to the final engine demand torque value and distributive value map, the distributive value of engine is determined.
The beneficial effects of the present invention are:
Engine Injection Control based on torque of the invention passes through driving based on gas pedal aperture and engine speed
The person's of sailing demand torque map obtains the demand torque of driver, and motor Power assisted control is by being based on SOC value of battery and motor speed
Motor booster torquemoment map, obtain motor booster torquemoment value, accelerate in vehicle start or high speed goes up a slope and anxious accelerates to overtake other vehicles
Equal significant power demands operating condition reduces the actual torque output of engine by the increase of motor booster torquemoment value, final to obtain very
Real operator demand's torque obtains the distributive value of engine by torque and distributive value map, is reduced by the power-assisted of motor
Vehicle start accelerates or tells upward slope and the anxious torque output for accelerating significant power demands operating conditions such as overtaking other vehicles and distributive value, realizes section
The purpose of oil, guarantees the stable operation of vehicle.
Detailed description of the invention
Fig. 1 is the flow chart of motor of hybrid power automobile power assist control method of the invention.
Specific embodiment
A specific embodiment of the invention is further described with reference to the accompanying drawing:
A kind of vehicle, engine, generator, vehicle speed sensor, gas pedal jaw opening sensor, engine speed sensor
And entire car controller, desired signal, as speed, gas pedal aperture, engine speed, battery SOC are sent to by CAN network
Entire car controller, gas pedal aperture change rate are calculated by the gas pedal opening value of corresponding time interval, driver
Demand torque MAP (map) and motor booster torquemoment MAP are obtained according to test, and are demarcated by calibration means in full-vehicle control
Device.In vehicle start boost phase, Engine ECU is turned round according to engine speed and the corresponding operator demand of gas pedal aperture
Square MAP obtains the demand torque value of driver, and electric machine controller is according to power battery SOC value and the corresponding motor of motor speed
Torque value MAP obtains motor booster torquemoment value.In view of the too strong problem of power caused by motor power-assisted, the true need of driver
It asks torque to need to subtract motor booster torquemoment value, then passes through torque and the true oil spout of Engine Injection Mass MAP Relation acquisition
Amount reduces torque output and the distributive value of engine starting stage by the power-assisted of motor, is that starting boost phase realizes energy conservation
Important means；During high vehicle speeds, it is contemplated that go up a slope or anxious acceleration overtakes other vehicles and waits significant power demands operating condition, to avoid
Distributive value fluctuation or problems of too caused by the undue fluctuation of engine torque output, will go up a slope or it is anxious accelerate to overtake other vehicles compared to
The at the uniform velocity power of operating condition when driving increases, and is realized by motor power-assisted, is that high-speed working condition realizes energy-efficient important means.
Motor of hybrid power automobile power assist control method provided in this embodiment, includes the following steps:
1) speed, gas pedal aperture and engine speed are acquired, if speed judges oil less than the first speed setting value
Whether door pedal opening is greater than or equal to aperture setting value, if gas pedal aperture is greater than or equal to aperture setting value, judges
Whether engine speed is less than or equal to speed setting value；If speed is greater than the second speed setting value, the first speed setting value is less than
Second speed setting value, then judge whether gas pedal aperture change rate is greater than aperture change rate setting value.
2) if engine speed is less than or equal to speed setting value or gas pedal aperture change rate more than or equal to aperture change
Rate setting value, then obtaining motor booster torquemoment value according to battery charge state need to guarantee that battery charge state value is big herein
In equal to battery charge state setting value.
3) final engine demand torque value is determined according to motor booster torquemoment value and engine demand torque value, started
Machine demand torque value is obtained by engine speed operator demand's torque map corresponding with gas pedal aperture, final
Engine demand torque value is the difference that engine demand torque value subtracts motor booster torquemoment value.
4) after getting final engine demand torque value, according to final engine demand torque value and oil spout spirogram
Genealogical relationship obtains the distributive value of engine.
It is specific as shown in Figure 1, comprising the following steps:
1, the speed for acquiring vehicle, judges whether speed is less than or equal to the first speed setting value, the first speed setting value is
Akm/h thens follow the steps 4, otherwise executes step if speed at this time is less than or equal to Akm/h (vehicle is in starting boost phase)
Rapid 2；
2, judge whether speed is more than or equal to the second speed setting value, the second speed setting value is Bkm/h, wherein the second vehicle
Fast setting value is more than or equal to the first speed setting value, i.e. B >=A, if speed at this time is greater than or equal to Bkm/h, (vehicle is in high speed
Go up a slope or anxious acceleration overtaken other vehicles the stage), 3 are thened follow the steps, is otherwise terminated；
3, judge whether gas pedal aperture change rate is greater than or equal to pedal opening change rate setting value, pedal opening becomes
Rate setting value is that E thens follow the steps 6, otherwise terminate if gas pedal aperture change rate is greater than or equal to E；
4, judge whether gas pedal aperture is more than or equal to aperture setting value, aperture setting value is C%, if gas pedal is opened
Degree is greater than or equal to C%, thens follow the steps 5, otherwise terminates；
5, judge whether engine speed is less than or equal to speed setting value, speed setting value is D rpms, if engine
Revolving speed is less than or equal to D rpms, thens follow the steps 6, otherwise terminates；
6, judge whether power battery charged state SOC value is more than or equal to battery charge state setting value, battery charge shape
State setting value is that F% thens follow the steps 7, otherwise terminate if whether power battery charged state SOC value is more than or equal to F%；
7, according to engine speed and the corresponding operator demand's torque MAP of gas pedal aperture, the need of driver are obtained
Torque value G is sought, according to power battery SOC value and the corresponding motor torque values MAP of motor speed, obtains motor booster torquemoment value H,
Then step 8 is executed；
8, the torque value G of operator demand obtained in step 7 is subtracted into motor booster torquemoment value H, obtains final drive
The person of sailing demand torque value G-H obtains the distributive value of engine by the torque value and distributive value MAP chart.
Parameter in the present embodiment, such as speed Akm/h, speed B km/h, gas pedal aperture C%, gas pedal aperture
Change rate E, power battery SOC value F%, operator demand's torque MAP and motor torque values MAP, can according to different automobile types, no
It is demarcated with power configuration.
The present invention also provides a kind of hybrid electric vehicle engine torque control system, including memory, controller with
And computer program when storing on a memory and can run on the controller, the controller are realized when executing described program
Following steps:
(1) speed, gas pedal aperture and engine speed are acquired, if speed judges less than the first speed setting value
Whether gas pedal aperture is greater than or equal to aperture setting value, if gas pedal aperture is greater than or equal to aperture setting value, sentences
Whether disconnected engine speed is less than or equal to speed setting value；If speed is greater than the second speed setting value, the first speed setting
Value is less than the second speed setting value, then judges whether gas pedal aperture change rate is greater than aperture change rate setting value；
(2) if the engine speed is greater than less than or equal to the speed setting value or gas pedal aperture change rate etc.
In aperture change rate setting value, then motor booster torquemoment value is obtained according to battery charge state；
(3) final engine demand torque is determined according to the motor booster torquemoment value and engine demand torque value
Value.
Specific embodiment is presented above, but the present invention is not limited to embodiment described above.The present invention
Basic ideas be above-mentioned basic scheme, for those of ordinary skill in the art, introduction according to the present invention is designed each
The model of kind deformation, formula, parameter do not need to spend creative work.The case where not departing from the principle and spirit of the invention
Under to embodiment carry out change, modification, replacement and modification still fall in protection scope of the present invention.
Claims (10)
1. a kind of hybrid electric vehicle engine torque control method, which comprises the steps of:
1) speed, gas pedal aperture and engine speed are acquired, if speed judges that throttle is stepped on less than the first speed setting value
Whether plate aperture is greater than or equal to aperture setting value, if gas pedal aperture is greater than or equal to aperture setting value, judgement is started
Whether machine revolving speed is less than or equal to speed setting value；If speed is greater than the second speed setting value, the first speed setting value is less than
The second speed setting value, then judge whether gas pedal aperture change rate is greater than aperture change rate setting value；
If 2) engine speed is more than or equal to less than or equal to the speed setting value or gas pedal aperture change rate and opens
Change rate setting value is spent, then motor booster torquemoment value is obtained according to battery charge state；
3) final engine demand torque value is determined according to the motor booster torquemoment value and engine demand torque value.
2. hybrid electric vehicle engine torque control method according to claim 1, which is characterized in that the engine
Demand torque value is obtained by engine speed operator demand's torque map corresponding with the gas pedal aperture.
3. hybrid electric vehicle engine torque control method according to claim 1 or 2, which is characterized in that obtaining
Before motor booster torquemoment value, it need to guarantee that battery charge state value is more than or equal to battery charge state setting value.
4. hybrid electric vehicle engine torque control method according to claim 2, which is characterized in that described final
Engine demand torque value is the difference that the engine demand torque value subtracts the motor booster torquemoment value.
5. hybrid electric vehicle engine torque control method according to claim 4, which is characterized in that get final
Engine demand torque value after, according to the final engine demand torque value and distributive value map, determine engine
Distributive value.
6. a kind of hybrid electric vehicle engine torque control system, including memory, controller and storage are on a memory
And computer program when can run on the controller, which is characterized in that the controller is realized following when executing described program
Step:
(1) speed, gas pedal aperture and engine speed are acquired, if speed judges throttle less than the first speed setting value
Whether pedal opening is greater than or equal to aperture setting value, if gas pedal aperture is greater than or equal to aperture setting value, judges to send out
Whether motivation revolving speed is less than or equal to speed setting value；If speed is greater than the second speed setting value, the first speed setting value is small
In the second speed setting value, then judge whether gas pedal aperture change rate is greater than aperture change rate setting value；
(2) it is opened if the engine speed is more than or equal to less than or equal to the speed setting value or gas pedal aperture change rate
Change rate setting value is spent, then motor booster torquemoment value is obtained according to battery charge state；
(3) final engine demand torque value is determined according to the motor booster torquemoment value and engine demand torque value.
7. hybrid electric vehicle engine torque control system according to claim 6, which is characterized in that the engine
Demand torque value is obtained by engine speed operator demand's torque map corresponding with the gas pedal aperture.
8. hybrid electric vehicle engine torque control system according to claim 6 or 7, which is characterized in that obtaining
Before motor booster torquemoment value, it need to guarantee that battery charge state value is more than or equal to battery charge state setting value.
9. hybrid electric vehicle engine torque control system according to claim 7, which is characterized in that described final
Engine demand torque value is the difference that the engine demand torque value subtracts the motor booster torquemoment value.
10. a kind of vehicle, which is characterized in that including engine, generator, vehicle speed sensor, gas pedal jaw opening sensor, hair
Motivation speed probe and entire car controller, the entire car controller turn for acquiring speed, gas pedal aperture and engine
Speed, if speed judges whether gas pedal aperture is greater than or equal to aperture setting value less than the first speed setting value, if throttle
Pedal opening is greater than or equal to aperture setting value, then judges whether engine speed is less than or equal to speed setting value；If speed is big
In the second speed setting value, the first speed setting value is less than the second speed setting value, then judges gas pedal aperture
Whether change rate is greater than aperture change rate setting value；If entire car controller judges that the engine speed is less than or equal to described turn
Fast setting value or gas pedal aperture change rate are more than or equal to aperture change rate setting value, then are obtained according to battery charge state
Motor booster torquemoment value；And the entire car controller determines most according to the motor booster torquemoment value and engine demand torque value
Whole engine demand torque value.
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| CN110217234A (en) * | 2019-06-26 | 2019-09-10 | 奇瑞汽车股份有限公司 | The control method and device of engine power output |
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| CN111645689A (en) * | 2020-03-16 | 2020-09-11 | 摩登汽车有限公司 | Method and system for calculating total vehicle required torque |
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