CN105752073B - A kind of hybrid electric vehicle back-sliding prevention control method - Google Patents
A kind of hybrid electric vehicle back-sliding prevention control method Download PDFInfo
- Publication number
- CN105752073B CN105752073B CN201610093629.4A CN201610093629A CN105752073B CN 105752073 B CN105752073 B CN 105752073B CN 201610093629 A CN201610093629 A CN 201610093629A CN 105752073 B CN105752073 B CN 105752073B
- Authority
- CN
- China
- Prior art keywords
- motor
- vehicle
- hybrid vehicle
- engine
- rotating speed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000002265 prevention Effects 0.000 title claims abstract description 52
- 238000000034 method Methods 0.000 title claims abstract description 38
- 230000008569 process Effects 0.000 claims abstract description 12
- 238000005096 rolling process Methods 0.000 claims description 8
- 230000005540 biological transmission Effects 0.000 claims description 3
- 230000007935 neutral effect Effects 0.000 claims description 3
- 238000001514 detection method Methods 0.000 abstract 2
- 238000010586 diagram Methods 0.000 description 3
- 230000001133 acceleration Effects 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/02—Conjoint control of vehicle sub-units of different type or different function including control of driveline clutches
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
- B60W10/06—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of combustion engines
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
- B60W10/08—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of electric propulsion units, e.g. motors or generators
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W20/00—Control systems specially adapted for hybrid vehicles
- B60W20/10—Controlling the power contribution of each of the prime movers to meet required power demand
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2710/00—Output or target parameters relating to a particular sub-units
- B60W2710/02—Clutches
- B60W2710/021—Clutch engagement state
- B60W2710/023—Clutch engagement rate
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2710/00—Output or target parameters relating to a particular sub-units
- B60W2710/06—Combustion engines, Gas turbines
- B60W2710/0644—Engine speed
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2710/00—Output or target parameters relating to a particular sub-units
- B60W2710/06—Combustion engines, Gas turbines
- B60W2710/0666—Engine torque
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2710/00—Output or target parameters relating to a particular sub-units
- B60W2710/08—Electric propulsion units
- B60W2710/081—Speed
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2710/00—Output or target parameters relating to a particular sub-units
- B60W2710/08—Electric propulsion units
- B60W2710/083—Torque
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/62—Hybrid vehicles
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Automation & Control Theory (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Hybrid Electric Vehicles (AREA)
Abstract
The present invention relates to mixing motor-car technical field more particularly to a kind of hybrid electric vehicle back-sliding prevention control methods.The control method is included in hybrid electric vehicle starting or driving process, vehicle control system obtains the rollback condition signal of the hybrid electric vehicle, when rollback condition signal is high level, the hybrid electric vehicle is in rollback condition, the vehicle control system enters anti-slip back control model, whether detection dynamo battery and battery capacity meet normal running conditions, according to detection case, vehicle control system carries out motor speed control and control of engine speed respectively, motor and engine is set to export anti-slip back required driving torque, or motor does not enable, vehicle control system only carries out control of engine speed, driving torque needed for keeping engine output anti-slip back, prevent the vehicle rollback as caused by driver actions are unskilled or operation error, and then avoid the generation of the peril as caused by vehicle rollback.
Description
Technical Field
The invention relates to the technical field of hybrid vehicles, in particular to a back slip prevention control method for a hybrid vehicle.
Background
Vehicle rollback refers to the movement of the vehicle opposite to the driver's intention to move forward due to road conditions and the like. At present, vehicle rollback is a key and common technical problem in the field of new energy automobiles.
In the prior art, the method mainly aims at a pure electric vehicle anti-back-slip control method, and the method mainly comprises two methods: after the gradient is identified, the motor is subjected to idle speed control, and pure electric slope slipping is prevented. And secondly, after the gradient is identified, torque self-balancing control is carried out on the motor, so that the position of a rotor of the motor is maintained at the detected initial position, and the vehicle is stopped on the gradient.
The anti-back-slip control method for the pure electric vehicle has the advantages that the slope is identified on the premise, so that the cost of an additional slope sensor is increased or a large amount of slope calculation logic is added, the precision cannot be guaranteed, more interaction with voltage and current control and feedback signals in a motor is needed, and the control is complex.
The hybrid electric vehicle adopts a traditional internal combustion engine (a diesel engine or a gasoline engine) and a motor as power sources, and is different from a pure electric vehicle in structure, and the anti-back-slip control method of the pure electric vehicle cannot be applied to the hybrid electric vehicle.
Disclosure of Invention
Technical problem to be solved
The invention provides a back-sliding prevention control method suitable for a hybrid vehicle, which prevents the back sliding of the vehicle caused by unskilled actions or misoperation of a driver and further avoids the occurrence of dangerous accidents caused by the back sliding of the vehicle.
(II) technical scheme
In order to solve the technical problem, the invention provides a back-slip prevention control method for a hybrid vehicle, which comprises the following steps:
s1, when the hybrid vehicle is started or in the driving process, the vehicle control system acquires a back-rolling state signal of the hybrid vehicle and judges whether the hybrid vehicle is in a back-rolling state;
when the obtained back-sliding state signal is at a high level, the hybrid vehicle is in a back-sliding state, and the vehicle control system enters a back-sliding prevention control mode;
s2, detecting whether the motor battery and the motor electric quantity can work normally;
when the electric quantity of the motor battery and the electric quantity of the motor can meet normal working conditions, the vehicle control system respectively controls the rotating speed of the motor and the rotating speed of the engine, so that the motor and the engine jointly output driving torque required by backward slipping prevention to prevent the hybrid vehicle from backward slipping;
when any one of the electric quantity of the motor battery and the electric quantity of the motor can not meet the normal working condition, the motor can not be enabled, and the vehicle control system only controls the rotating speed of the engine to enable the engine to output the driving torque required by the back slip prevention so as to prevent the hybrid vehicle from back slip.
When the motor and the engine output the driving torque required for preventing back slipping together or only the engine outputs the driving torque required for preventing back slipping, the vehicle control system is matched with each other to control the combination speed and the position of the clutch for adjusting the output of the torque.
Preferably, the acquiring a rollback state signal of the hybrid vehicle when the hybrid vehicle is started or in a driving process includes:
when the hybrid vehicle is started or in the driving process, obtaining a back-sliding state parameter;
acquiring a back-sliding state signal of the hybrid vehicle according to the back-sliding state parameter;
and the back-sliding state parameters comprise the rotating speed of the motor, the current gear and a brake value.
Preferably, the rollback state signal comprises:
acquiring a level signal corresponding to the back-slipping state parameter according to the back-slipping state parameter;
performing AND operation on the level signal of the back-sliding state parameter to obtain a back-sliding state signal of the hybrid electric vehicle; wherein,
when the rotating speed of the motor is less than 0, the motor is at a high level, otherwise, the motor is at a low level;
the current gear is a high level when not in neutral, otherwise, the current gear is a low level;
and when the brake value is smaller than the preset brake threshold value, the high level is set, otherwise, the low level is set.
Preferably, the motor rotating speed control is to perform closed-loop control to adjust the output torque of the motor according to the target rotating speed of the motor;
the engine rotating speed control is to perform closed-loop rotating speed control according to a target rotating speed higher than a normal driving mode and adjust the output torque of the engine;
and the rotational speeds of the motor and the engine are set in accordance with the transmission ratio of the motor and the engine.
Preferably, the engagement speed and position of the clutch are controlled to first quickly engage to the slip point and then move to the minimum position of clutch engagement at a speed faster than normal drive mode, and the clutch position request required to prevent engine stall is ignored.
Preferably, when the hybrid vehicle is a single-shaft parallel hybrid, the target rotational speeds of the motor and the motor are set to the same value, and the rotational speeds of the motor and the engine are set to prevent the engine from stalling.
Preferably, when the vehicle control system is in the back-slip prevention control mode, a back-slip quitting state signal of the hybrid vehicle is obtained in real time, and whether the hybrid vehicle meets the condition of quitting the back-slip prevention control mode is judged;
when the obtained signal for exiting the back-sliding state is in a high level, the vehicle control system is switched from the back-sliding prevention mode to a normal driving mode;
when the acquired signal for exiting the rollback state is at a low level, the vehicle control system continues to maintain the rollback prevention mode.
Preferably, when the clutch is completely combined and the rotating speed of the motor is greater than a preset value, or the hybrid vehicle is in a braking state, the signal for exiting the rollback state is high level, otherwise, the signal for exiting the rollback state is low level.
Preferably, when the vehicle control system enters the anti-rollback control mode, the vehicle control system adopts sound and warning lights for prompting.
(III) advantageous effects
The technical scheme of the invention has the following advantages: the invention provides a back-slipping prevention control method for a hybrid vehicle, which comprises the steps that a vehicle control system acquires a back-slipping state signal of the hybrid vehicle in the starting or driving process of the hybrid vehicle, when the back-sliding state signal is at high level, the hybrid vehicle is in back-sliding state, the vehicle control system enters into back-sliding prevention control mode, whether the electric quantity of the motor battery and the battery meets the normal working condition is detected, according to the conditions of the motor battery and the battery electric quantity, the vehicle control system respectively controls the rotating speed of the motor and the rotating speed of the engine to ensure that the engine outputs the driving torque required by the back slip prevention, or the motor is not enabled, the vehicle control system only controls the rotating speed of the engine, so that the engine outputs the driving torque required by the backward sliding prevention, the backward sliding of the vehicle caused by unskilled actions or misoperation of a driver is prevented, and further the occurrence of dangerous accidents caused by the backward sliding of the vehicle is avoided.
Drawings
FIG. 1 is a schematic diagram of a total flow of back-slip prevention control according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a determination process of a rollback state according to an embodiment of the present invention;
FIG. 3 is a schematic flow chart of a rollback prevention control mode according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a process for determining a rollback exit state according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
As shown in fig. 1, a general flow of a method for controlling back-slip prevention of a hybrid vehicle according to an embodiment of the present invention includes:
1. judging that the vehicle is in a backward sliding state;
when the vehicle is started or in the driving process, monitoring whether the back-sliding state signal is at a high level in real time, when the back-sliding state signal is detected to be at the high level, the vehicle is in a back-sliding state, and if the back-sliding state signal is at the high level, the vehicle control system directly enters a back-sliding prevention control mode; and if the vehicle runs, the vehicle control system is switched from the normal driving mode to the anti-rollback control mode.
If the vehicle is in a non-rollback state, the vehicle control system is in a normal driving control mode;
2. detecting whether the signal for exiting the reverse sliding state is in a high level;
when the vehicle control system is in the back-slipping prevention control mode, the vehicle control system can detect a back-slipping quitting state signal in real time, and when the back-slipping quitting state signal is at a high level, the vehicle control system is switched from the back-slipping prevention mode to a normal driving mode; and when the obtained signal for exiting the rollback state is in a low level, the vehicle control system continuously maintains the rollback prevention mode.
As shown in fig. 2, the specific anti-rollback determination process includes:
when the vehicle is in a starting state, namely the vehicle is electrified and an engine is in a starting state, obtaining back-sliding state parameters, wherein the back-sliding state parameters comprise a motor rotating speed, a current gear and a brake value;
then according to the back-slipping state parameter, obtaining a level signal corresponding to the back-slipping state parameter,
when the rotating speed of the motor is less than 0, the motor is at a high level, otherwise, the motor is at a low level;
when the current gear is not in the neutral position, the current gear is at a high level, otherwise, the current gear is at a low level;
and when the braking value is smaller than the preset braking threshold value, the high level is set, otherwise, the low level is set.
Performing AND operation on the level signals of the back-sliding state parameters to obtain the back-sliding state signals of the hybrid electric vehicle, namely when the level signals of the back-sliding state parameters are all high level, the back-sliding state signals of the hybrid electric vehicle are high level; when any one of the level signals of the rollback state parameter is at a low level, the rollback state signal of the hybrid vehicle is at a low level.
As shown in fig. 3, after the vehicle control system performs the back-slip prevention control mode, the specific control flow of the back-slip prevention control mode is as follows:
firstly, a vehicle control system detects whether a motor battery is normal or not and whether the battery electric quantity is enough to support the motor to output a certain torque or not;
if the battery of the motor is normal and the electric quantity of the battery meets the torque output condition, the vehicle control system respectively controls the rotating speed of the motor and the rotating speed of the engine through the motor controller and the engine controller, so that the motor and the engine jointly output the driving torque required by the back slip prevention, and the back slip of the hybrid vehicle is prevented.
When any one of the electric quantity of the motor battery and the electric quantity of the motor can not meet the normal working condition, the motor can not be enabled, and the vehicle control system only controls the rotating speed of the engine to enable the engine to output the driving torque required by the back slip prevention so as to prevent the hybrid vehicle from back slip.
The control method comprises the steps that a motor and an engine output driving torque required by back slipping prevention, a vehicle control system and a clutch are controlled in a matched mode, the clutch is controlled to be quickly connected to a sliding point, then the clutch moves to the minimum position where the clutch is connected at a speed higher than that in a normal driving mode, the clutch is controlled to be completely connected in the shortest time, the purpose that the engine torque is transmitted to a wheel end in the shortest time is achieved, and the position request of the clutch required by engine flameout prevention is ignored at the moment.
The motor rotating speed control is to perform closed-loop control to adjust the output torque of the motor according to the target rotating speed of the motor; the engine speed control is closed-loop speed control according to a target speed higher than a normal driving mode, the output torque of the engine is adjusted, and the target speeds of the motor and the engine are set to meet the transmission ratio of the motor and the engine. The engine target speed may be determined according to the magnitude of the motor reverse rotation speed acceleration during rollback, that is, the larger the motor reverse rotation speed acceleration is, that is, the larger the rollback tendency is, the larger the engine target speed is. The closed-loop control mentioned above may adopt a conventional PID control method, and may also adopt other closed-loop control methods.
When the hybrid vehicle is a single-shaft parallel hybrid assembly, the target rotating speeds of the motor and the engine are set to be the same value, and the rotating speeds of the motor and the engine are set to prevent the engine from stalling.
When the vehicle control system is in a back-slipping prevention control mode, acquiring a back-slipping quitting state signal of the hybrid vehicle in real time to judge whether the hybrid vehicle meets the condition of quitting the back-slipping prevention control mode, and when the acquired back-slipping quitting state signal is in a high level, switching the back-slipping prevention mode of the vehicle control system to a normal driving mode; when the acquired signal for exiting the rollback state is at a low level, the vehicle control system continues to maintain the rollback prevention mode.
As shown in fig. 4, when the clutch is fully engaged and the motor speed is greater than a preset value (the preset value is a positive value) so that the output torque of the motor is enough to prevent the rollback, the signal of the rollback exit state is high, and the vehicle control system is switched from the rollback prevention mode to the normal driving mode.
When the clutch is not completely combined or the rotating speed of the motor is not greater than a preset value, the vehicle is in a braking state, namely the braking value is greater than a set braking threshold value, the braking force is enough to prevent the vehicle from rolling back, a signal of the state of rolling back is in a high level, and the vehicle control system is switched from the rolling back prevention mode to a normal driving mode.
And when the two conditions cannot be met, the vehicle control system exits the back-sliding state signal and continues to maintain the back-sliding prevention mode.
Further, in order to alert the driver that the vehicle is currently in the rollback state, it is preferable that the vehicle control system alerts the driver by sound and/or light when the vehicle is in the rollback state, as shown in fig. 3.
In summary, the method for controlling the hybrid vehicle to prevent the hybrid vehicle from slipping backwards provided by the embodiment determines whether the vehicle is in a slipping backwards state, performs the slipping prevention control by the vehicle control system when the vehicle is in the slipping backward state, and switches to a normal control mode according to the requirements of the driver when the condition that the vehicle is in the slipping backward state is determined; if the vehicle is not in the reverse slipping state, the vehicle control system directly enters a normal driving control mode or the vehicle runs when the vehicle is started, and the vehicle control system keeps the normal driving control mode.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (7)
1. A back-slip prevention control method for a hybrid vehicle is characterized by comprising the following steps:
s1, when the hybrid vehicle is started or in the driving process, the vehicle control system acquires a back-rolling state signal of the hybrid vehicle and judges whether the hybrid vehicle is in a back-rolling state;
when the obtained back-sliding state signal is at a high level, the hybrid vehicle is in a back-sliding state, and the vehicle control system enters a back-sliding prevention control mode;
s2, detecting whether the motor battery and the motor electric quantity can work normally;
when the electric quantity of the motor battery and the electric quantity of the motor can meet normal working conditions, the vehicle control system respectively controls the rotating speed of the motor and the rotating speed of the engine, so that the motor and the engine jointly output driving torque required by backward slipping prevention to prevent the hybrid vehicle from backward slipping;
when any one of the electric quantity of the motor battery and the electric quantity of the motor can not meet the normal working condition, the motor can not be enabled, the vehicle control system only controls the rotating speed of the engine, and the engine outputs the driving torque required by the back slip prevention to prevent the hybrid vehicle from back slip;
when the motor and the engine output the driving torque required for preventing back slipping together or only the engine outputs the driving torque required for preventing back slipping, the vehicle control system is matched with each other to control the combination speed and the position of the clutch for adjusting the output of the torque;
when the hybrid vehicle is started or in the driving process, obtaining a back-rolling state signal of the hybrid vehicle comprises the following steps:
when the hybrid vehicle is started or in the driving process, obtaining a back-sliding state parameter;
acquiring a back-sliding state signal of the hybrid vehicle according to the back-sliding state parameter;
the back-sliding state parameters comprise the rotating speed of a motor, a current gear and a brake value;
the clutch engagement speed and position are controlled to first quickly engage to the slip point and then move to a minimum clutch engagement position at a speed faster than normal drive mode, and ignoring the clutch position request required to prevent engine stall.
2. The back-slip prevention control method of a hybrid vehicle according to claim 1, characterized in that: the rollback state signal comprises:
acquiring a level signal corresponding to the back-slipping state parameter according to the back-slipping state parameter;
performing AND operation on the level signal of the back-sliding state parameter to obtain a back-sliding state signal of the hybrid electric vehicle; wherein,
when the rotating speed of the motor is less than 0, the motor is at a high level, otherwise, the motor is at a low level;
the current gear is a high level when not in neutral, otherwise, the current gear is a low level;
and when the brake value is smaller than the preset brake threshold value, the high level is set, otherwise, the low level is set.
3. The back-slip prevention control method of a hybrid vehicle according to claim 1, characterized in that: the motor rotating speed control is to perform closed-loop control to adjust the output torque of the motor according to the target rotating speed of the motor;
the engine rotating speed control is to perform closed-loop rotating speed control according to a target rotating speed higher than a normal driving mode and adjust the output torque of the engine;
and the rotational speeds of the motor and the engine are set in accordance with the transmission ratio of the motor and the engine.
4. The back-slip prevention control method of a hybrid vehicle according to claim 3, characterized in that: when the hybrid vehicle is a single-shaft parallel hybrid assembly, the target rotating speed of the motor and the target rotating speed of the engine are set to be the same value, and the rotating speed of the motor and the rotating speed of the engine are set to prevent the engine from stalling.
5. The back-slip prevention control method of a hybrid vehicle according to claim 1, characterized in that: when the vehicle control system is in the back-slip prevention control mode, obtaining a back-slip quitting state signal of the hybrid vehicle in real time, and judging whether the hybrid vehicle meets the condition of quitting the back-slip prevention control mode;
when the obtained signal for exiting the back-sliding state is in a high level, the vehicle control system is switched from the back-sliding prevention mode to a normal driving mode;
when the acquired signal for exiting the rollback state is at a low level, the vehicle control system continues to maintain the rollback prevention mode.
6. The back-slip prevention control method of a hybrid vehicle according to claim 5, characterized in that: when the clutch is completely combined and the rotating speed of the motor is greater than a preset value, or the hybrid vehicle is in a braking state, the signal for exiting the rollback state is high level, otherwise, the signal for exiting the rollback state is low level.
7. The back-slip prevention control method for a hybrid vehicle according to any one of claims 1 to 6, characterized in that: and when the vehicle control system enters a back slip prevention control mode, prompting by sound and a warning lamp.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610093629.4A CN105752073B (en) | 2016-02-19 | 2016-02-19 | A kind of hybrid electric vehicle back-sliding prevention control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610093629.4A CN105752073B (en) | 2016-02-19 | 2016-02-19 | A kind of hybrid electric vehicle back-sliding prevention control method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105752073A CN105752073A (en) | 2016-07-13 |
| CN105752073B true CN105752073B (en) | 2018-11-16 |
Family
ID=56330181
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610093629.4A Active CN105752073B (en) | 2016-02-19 | 2016-02-19 | A kind of hybrid electric vehicle back-sliding prevention control method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105752073B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108082174A (en) * | 2017-12-14 | 2018-05-29 | 黄晓丽 | A kind of control method of hybrid electric vehicle |
| CN108058619A (en) * | 2017-12-14 | 2018-05-22 | 阜阳裕晟电子科技有限公司 | A kind of vehicle back-sliding prevention control method |
| US10518773B2 (en) | 2018-01-08 | 2019-12-31 | Ford Global Technologies, Llc | Vehicle and vehicle launch method |
| CN115352457B (en) * | 2022-09-02 | 2024-06-18 | 潍柴动力股份有限公司 | Method and device for determining landslide state of vehicle, processor and MCU |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7828694B2 (en) * | 2007-08-16 | 2010-11-09 | Ford Global Technologies, Llc | Rollback control of a hybrid electric vehicle |
| US7743860B2 (en) * | 2007-10-09 | 2010-06-29 | Ford Global Technologies, Llc | Holding a hybrid electric vehicle on an inclined surface |
| KR20090125897A (en) * | 2008-06-03 | 2009-12-08 | 현대자동차주식회사 | Hybrid vehicle equipped with anti roll back unit and control method of anti roll back unit |
| GB201200279D0 (en) * | 2012-01-09 | 2012-02-22 | Land Rover Uk Ltd | Vehicle rollback control apparatus and method |
| CN103538586B (en) * | 2012-07-13 | 2016-03-09 | 北汽福田汽车股份有限公司 | The control method of electronlmobil |
| GB2506600A (en) * | 2012-10-02 | 2014-04-09 | Gm Global Tech Operations Inc | Hybrid powertrain with hill holder control |
| CN103802832A (en) * | 2012-11-12 | 2014-05-21 | 奥托立夫开发公司 | Hill start assist method |
| ITBO20130469A1 (en) * | 2013-08-30 | 2015-03-01 | Magneti Marelli Spa | METHOD OF CONTROL OF A HYBRID VEHICLE TO AVOID THE RETRACTION AND ADVANCEMENT OF THE HYBRID VEHICLE DURING STOPPING ON A SLOPE ROAD |
| FR3021280B1 (en) * | 2014-05-21 | 2017-12-22 | Renault Sas | METHOD FOR CONTROLLING A MOTOR POWER PACKAGE OF A VEHICLE, DEVICE AND CORRESPONDING VEHICLE. |
-
2016
- 2016-02-19 CN CN201610093629.4A patent/CN105752073B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN105752073A (en) | 2016-07-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107097777B (en) | System and method for managing torque | |
| CN105946844B (en) | The control method and system of hybrid vehicle clutch engagement | |
| CN108275153B (en) | Method and system for controlling electric automobile to slide down slope | |
| KR100520565B1 (en) | Method and system for controlling regenerative braking of a four wheel drive electric vehicle | |
| CN105966401B (en) | A kind of vehicle sliding shutdown fuel-economizing controlling method | |
| JP5925079B2 (en) | Motor control device | |
| US8439795B2 (en) | Apparatus for controlling motor torque | |
| CN102514570B (en) | A kind of series hybrid electric vehicle and driving engine on off control method, system | |
| KR101610120B1 (en) | Apparatus and method for controlling creep torque of hybrid electirc vehicle | |
| US20080223634A1 (en) | Vehicle Drive System | |
| US20120130579A1 (en) | Method and device for determining the beginning of a start phase of an internal combustion engine in a hybrid vehicle | |
| CN103802831B (en) | The control method of electric automobile | |
| CN105752073B (en) | A kind of hybrid electric vehicle back-sliding prevention control method | |
| US20130090799A1 (en) | Creep cut-off control device for electric vehicle | |
| CN106335404A (en) | Anti-running control method based on battery electric vehicle | |
| JP6008425B2 (en) | Auto cruise control device for hybrid vehicle | |
| US10059328B2 (en) | System and method to control battery current during rolling stop-start events | |
| CN111071060B (en) | Method and system for controlling slope slipping prevention torque of electric automobile | |
| CN103182952A (en) | Electronic hill-holding control system and electronic hill-holding control method for electric vehicles | |
| CN101985300A (en) | Torque control method capable of preventing driving wheels from slipping | |
| CN109823194B (en) | Ramp starting and hill-holding control system of pure electric vehicle | |
| JP2010540334A5 (en) | ||
| JP2012046182A (en) | Device for controlling idling stop of vehicle | |
| CN109263481B (en) | Method for assisting in controlling hill start of electric automobile | |
| CN116279396B (en) | Hybrid vehicle control method, device, storage medium and vehicle |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |