CN112406852B - Control method for hybrid vehicle and hybrid vehicle - Google Patents
Control method for hybrid vehicle and hybrid vehicle Download PDFInfo
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- CN112406852B CN112406852B CN201910770347.7A CN201910770347A CN112406852B CN 112406852 B CN112406852 B CN 112406852B CN 201910770347 A CN201910770347 A CN 201910770347A CN 112406852 B CN112406852 B CN 112406852B
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- pedal signal
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- 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
- B60W20/20—Control strategies involving selection of hybrid configuration, e.g. selection between series or parallel configuration
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- 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
- B60W2540/00—Input parameters relating to occupants
- B60W2540/10—Accelerator pedal position
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- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Hybrid Electric Vehicles (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention relates to a control method for a hybrid vehicle and the hybrid vehicle. The hybrid vehicle includes an internal combustion engine, a motor, and a multi-speed automatic transmission, in which a gear of the multi-speed automatic transmission is determined according to a pedal signal for control; in the pure electric mode, an actual accelerator pedal signal is adopted as a pedal signal for control; in the driving mode of the internal combustion engine, an actual accelerator pedal signal is adopted as a pedal signal for control; in the hybrid mode, the virtual accelerator pedal signal is used as an input accelerator pedal signal. According to the invention, a mode transition process is carried out during a change between the electric-only mode and the hybrid mode or between the hybrid mode and the internal combustion engine drive mode, in which mode transition process the pedal signal for control is changed from the actual accelerator pedal signal to the virtual accelerator pedal signal or from the virtual accelerator pedal signal to the actual accelerator pedal signal.
Description
Technical Field
The invention relates to a control method for a hybrid vehicle and the hybrid vehicle.
Background
For hybrid vehicles, in particular hybrid vehicles with a multi-gear automatic transmission, the efficiency and the emission performance of the entire vehicle can be improved by switching the operating mode (i.e. electric only mode, internal combustion engine driving mode, hybrid mode) and the transmission gear. During the running of the vehicle, frequent switching between the operating modes is possible, and the decision-making gear of the transmission during the switching has an important influence on the economy, the dynamic performance and the smoothness of the whole vehicle. In general, the gear of an automatic transmission is determined by means of a shift table, in particular a look-up table, on the basis of a pedal signal for control. Therefore, the pedal signal for control is important to obtain a proper gear. Meanwhile, for the hybrid vehicle, the torque demand of the driver is fed back by the accelerator pedal signal in real time. Therefore, in order to obtain good driving quality of the hybrid vehicle, it is necessary to accurately process the accelerator pedal signal.
Patent document CN103552520A discloses a method for processing signals of an accelerator pedal of a hybrid electric vehicle. The method comprises the following steps: the method comprises the steps of preprocessing an accelerator pedal signal, performing subsequent processing on the accelerator pedal signal and processing a fault diagnosis code.
Patent document CN101857027A discloses an acceleration and deceleration intention judgment system for a hybrid electric vehicle, which includes a vehicle control unit HCU, an engine management system ECU, a motor controller IPU, and a battery management system BCU. The HCU judges the intention of acceleration and deceleration according to the current automobile state, switches the state modes, calculates the required torque of the engine and the motor, boosts the motor in the acceleration state, and charges the motor in the deceleration state.
None of the above prior art techniques take into account the transient state of the accelerator pedal signal during the switching of the operating mode of the vehicle, which may have a significant effect on the driving quality of the vehicle.
Disclosure of Invention
The invention provides a control method for a hybrid vehicle and the hybrid vehicle, which can realize gear control suitable for various working modes of the hybrid vehicle, and particularly can realize smooth conversion among the working modes.
According to the present invention, there is provided a control method for a hybrid vehicle including an internal combustion engine, a motor, and a multi-speed automatic transmission, in which a gear of the multi-speed automatic transmission is determined according to a pedal signal for control,
in the pure electric mode, the actual accelerator pedal signal is adopted as the pedal signal for control,
in the driving mode of the internal combustion engine, the actual accelerator pedal signal is used as a pedal signal for control,
in the hybrid power mode, a virtual accelerator pedal signal is used as an input accelerator pedal signal,
when switching between the electric-only mode and the hybrid mode or between the hybrid mode and the internal combustion engine drive mode, a mode transition process is executed,
during the mode transition, the pedal signal for control is converted from the actual accelerator pedal signal to the virtual accelerator pedal signal or from the virtual accelerator pedal signal to the actual accelerator pedal signal.
According to the control method, firstly, the signals of the accelerator pedal are controlled in a segmented mode according to different working modes, so that proper control can be realized according to different working modes. In addition, by executing the mode transition process, the pedal signal for control is not jumped, but is smoothly transited, thereby ensuring smooth change of vehicle torque and adaptive operation of the automatic transmission. Thus improving the economy, dynamics and ride comfort of the vehicle as a whole.
In a preferred embodiment, during the mode transition, a target switching time for the pedal signal for control is determined from the absolute difference between the actual accelerator pedal signal and the virtual accelerator pedal signal, within which a conversion of the pedal signal for control from the actual accelerator pedal signal to the virtual accelerator pedal signal or from the virtual accelerator pedal signal to the actual accelerator pedal signal is carried out.
In a preferred embodiment, the target switching time is proportional to the absolute difference.
In a preferred embodiment, the pedal signal for control is linearly transformed from the actual accelerator pedal signal to the virtual accelerator pedal signal or from the virtual accelerator pedal signal to the actual accelerator pedal signal within the target switching time.
In a preferred embodiment, the virtual accelerator pedal signal is calculated during mode transition and in the hybrid mode; in the electric-only mode and the internal combustion engine drive mode, the virtual accelerator pedal signal is set to "0".
In a preferred embodiment, during the mode transition, a transformation gradient of the accelerator pedal signal is first determined, according to which the pedal signal for the control is linearly transformed from the actual accelerator pedal signal to the virtual accelerator pedal signal or from the virtual accelerator pedal signal to the actual accelerator pedal signal.
In a preferred embodiment, the pedal signal for control is also used for internal combustion engine control and/or electric machine control.
The invention also relates to a hybrid vehicle comprising an internal combustion engine, an electric machine and a multi-speed automatic transmission, which hybrid vehicle executes the control method according to the invention.
Drawings
Fig. 1 is a schematic structural block diagram of a hybrid vehicle.
FIG. 2 is a flow chart of accelerator pedal signal processing based on operating mode.
FIG. 3 is a flow chart of a transition of the accelerator pedal signal during a mode switch.
FIG. 4 is a schematic diagram of determination of a target accelerator pedal switch time.
FIG. 5 is a schematic diagram of one embodiment of a pedal signal for control.
Detailed Description
The control method and the hybrid vehicle according to the invention will be described below by way of specific embodiments with reference to the accompanying drawings. The exemplary embodiments, however, may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art.
The method according to the invention is applicable to a hybrid vehicle comprising an internal combustion engine, an electric machine and a multi-speed automatic transmission. Fig. 1 shows a schematic block diagram of a hybrid vehicle 10, which includes an internal combustion engine 11, an electric machine 12, and a multi-speed automatic transmission 13 coupled to the internal combustion engine 11 and the electric machine 12. The hybrid vehicle 10 further comprises a control module 14 for controlling gear changes of the automatic multi-gear transmission 13.
In the method according to the invention, the gear of the manual transmission is determined as a function of the pedal signal for the control. And the process of determining the pedal signal for control is shown in fig. 2. Referring to fig. 2, a pedal signal for control is determined according to an operation mode of the hybrid vehicle. In the pure electric mode, the actual accelerator pedal signal is used as the pedal signal for control. In the engine drive mode, the actual accelerator pedal signal is also used as the pedal signal for control. In the hybrid mode, the virtual accelerator pedal signal is used as the input accelerator pedal signal. That is, the accelerator pedal signal is controlled in stages for different operating modes. Therefore, the gear shifting table can be inquired according to different working modes by using a correct accelerator pedal signal, so that a proper gear is obtained.
If, on the other hand, the hybrid vehicle changes from one operating mode to another, for example between an electric-only mode and a hybrid mode or between a hybrid mode and an internal-combustion-engine-driven mode, the pedal signal used for control changes from the actual accelerator pedal signal to the virtual accelerator pedal signal or from the virtual accelerator pedal signal to the actual accelerator pedal signal. For this mode change, a mode transition procedure is performed. During this transition, if the pedal signal used for control jumps directly from the actual accelerator pedal signal to the virtual accelerator signal, this sudden change in the accelerator pedal signal will affect the overall vehicle performance and vice versa.
Fig. 3 shows a mode transition process. Referring to fig. 3, a process of transforming from an initial signal to a transformed signal (e.g., from an actual accelerator pedal signal to a virtual accelerator pedal signal or from a virtual accelerator pedal signal to an actual accelerator pedal signal) during a mode transition is shown. Here, at t0And triggering a mode transition process at moment, namely a first running period of the algorithm, wherein the initial values of the timing time and the counting times are 0. The actual accelerator pedal signal and the virtual accelerator pedal signal are compared, the larger one is used as an accelerator pedal signal 1, and the smaller one is used as an accelerator pedal signal 2. Then, the larger one is subtracted from the smaller one to calculate the difference of the accelerator pedal signals. Then, a target switching time is determined based on the accelerator pedal signal difference (as shown in fig. 4).
In each running period, the operation of strengthening the timing of the timing time and adding 1 to the counting number is firstly executed, and then the operation is based on the target switching time t1Time t is timedsetAnd calculating an accelerator pedal signal at a mode transition stage by using the accelerator pedal signal 1 and the accelerator pedal signal 2, wherein the calculation formula is as follows:
accelerator pedal signal (target switching time t)1-a timed time tset) Target switching time t1Initial signal + timing time tsetTarget switching time t1Transformed signal
Finally, time t will be timedsetAnd target switching time t1Comparing, if timing time tsetEqual to the target switching time t1If yes, ending the transition process; otherwise, repeating the above operations until the switching is completed.
Illustratively, FIG. 5 shows a particular transition process. As shown in FIG. 5, the vehicle was in electric only mode or fuel only mode prior to time t0, and the accelerator pedal signal was equal to the actual accelerator pedal signal. At t1After that time, the vehicle is in hybrid mode and the accelerator pedal signal is equal to the virtual accelerator pedal signal. The virtual accelerator pedal signal is calculated in the transition mode and the hybrid mode, and is set to 0 in the other operating modes (i.e., the electric-only mode and the engine-driven mode). t is t0Time t1The time is a mode transition in which the calculation process shown in fig. 3 is performed to change the pedal signal for control from the actual accelerator pedal signal to the virtual accelerator pedal signal.
Since the pedal signal for control is determined using the mode transition process in the changeover of the operating mode of the vehicle, the accelerator pedal signal switching during the changeover of the operating mode is smoothed. Therefore, smooth transition of torque of the vehicle can be ensured, and the automatic transmission can normally run in a gear position.
In addition, the pedal signal for control described above is also used for internal combustion engine control, motor control, and the like.
Other embodiments of the present invention will readily suggest themselves to such skilled persons having the benefit of this disclosure. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
Claims (7)
1. A control method for a hybrid vehicle including an internal combustion engine, a motor, and a multi-speed automatic transmission, in which a gear position of the multi-speed automatic transmission is determined based on a pedal signal for control,
in the pure electric mode, the actual accelerator pedal signal is adopted as the pedal signal for control,
in the driving mode of the internal combustion engine, the actual accelerator pedal signal is used as a pedal signal for control,
in the hybrid power mode, a virtual accelerator pedal signal is used as an input accelerator pedal signal,
it is characterized in that the preparation method is characterized in that,
when switching between the electric-only mode and the hybrid mode or between the hybrid mode and the internal combustion engine drive mode, a mode transition process is executed,
during the mode transition, the pedal signal for control is changed from the actual accelerator pedal signal to the virtual accelerator pedal signal or from the virtual accelerator pedal signal to the actual accelerator pedal signal,
during the mode transition, the target switching time of the pedal signal for control is determined according to the absolute value difference between the actual accelerator pedal signal and the virtual accelerator pedal signal, and the conversion of the pedal signal for control from the actual accelerator pedal signal to the virtual accelerator pedal signal or from the virtual accelerator pedal signal to the actual accelerator pedal signal is completed within the target switching time.
2. The control method according to claim 1, wherein the target switching time is proportional to the absolute value difference.
3. The control method according to claim 1, characterized in that the pedal signal for control is linearly transformed from the actual accelerator pedal signal to the virtual accelerator pedal signal or from the virtual accelerator pedal signal to the actual accelerator pedal signal within the target switching time.
4. The control method of claim 1, wherein the virtual accelerator pedal signal is calculated during mode transition and in the hybrid mode; in the electric-only mode and the internal combustion engine drive mode, the virtual accelerator pedal signal is set to "0".
5. Control method according to claim 1, characterized in that during a mode transition a transformation gradient of the accelerator pedal signal is first determined, according to which the pedal signal used for control is linearly transformed from the actual accelerator pedal signal to the virtual accelerator pedal signal or from the virtual accelerator pedal signal to the actual accelerator pedal signal.
6. Control method according to claim 1, characterized in that the pedal signal for control is also used for internal combustion engine control and/or electric machine control.
7. A hybrid vehicle including an internal combustion engine, an electric machine, and a multi-speed automatic transmission, the hybrid vehicle executing the control method according to any one of the preceding claims.
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| CN201910770347.7A CN112406852B (en) | 2019-08-20 | 2019-08-20 | Control method for hybrid vehicle and hybrid vehicle |
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| CN201910770347.7A CN112406852B (en) | 2019-08-20 | 2019-08-20 | Control method for hybrid vehicle and hybrid vehicle |
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| CN112406852A CN112406852A (en) | 2021-02-26 |
| CN112406852B true CN112406852B (en) | 2022-04-15 |
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| EP2769892A1 (en) * | 2013-02-26 | 2014-08-27 | McLaren Automotive Limited | Throttle behaviour |
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| JP2016124523A (en) * | 2015-01-08 | 2016-07-11 | トヨタ自動車株式会社 | Hybrid automobile |
| DE102016203571A1 (en) * | 2016-03-04 | 2017-09-07 | Schaeffler Technologies AG & Co. KG | An accelerator pedal device for a hybrid vehicle and a hybrid vehicle with the accelerator pedal device |
| CN108068798A (en) * | 2016-11-16 | 2018-05-25 | 上海汽车集团股份有限公司 | The method and device of gear pre-selection |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2523177B (en) * | 2014-02-18 | 2017-05-10 | Jaguar Land Rover Ltd | Vehicle movement on an inclined surface |
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Patent Citations (8)
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| CN102159438A (en) * | 2008-09-17 | 2011-08-17 | 本田技研工业株式会社 | Controller of vehicle |
| CN103619687A (en) * | 2011-07-05 | 2014-03-05 | Zf腓德烈斯哈芬股份公司 | Method for activating a hybrid drive of a vehicle |
| CN103523005A (en) * | 2012-07-02 | 2014-01-22 | 福特全球技术公司 | Hybrid vehicle and associated output torque control method |
| EP2769892A1 (en) * | 2013-02-26 | 2014-08-27 | McLaren Automotive Limited | Throttle behaviour |
| CN104908744A (en) * | 2014-03-11 | 2015-09-16 | 广州汽车集团股份有限公司 | Starting control method and system for hybrid electric vehicles,and hybrid control unit |
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