CN111775939B - Energy recovery method and system for hybrid vehicle - Google Patents
Energy recovery method and system for hybrid vehicle Download PDFInfo
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- CN111775939B CN111775939B CN202010627194.3A CN202010627194A CN111775939B CN 111775939 B CN111775939 B CN 111775939B CN 202010627194 A CN202010627194 A CN 202010627194A CN 111775939 B CN111775939 B CN 111775939B
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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
- B60W30/00—Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units, or advanced driver assistance systems for ensuring comfort, stability and safety or drive control systems for propelling or retarding the vehicle
- B60W30/18—Propelling the vehicle
- B60W30/18009—Propelling the vehicle related to particular drive situations
- B60W30/18109—Braking
- B60W30/18127—Regenerative braking
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
- B60L15/20—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
- B60L15/2009—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed for braking
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L7/00—Electrodynamic brake systems for vehicles in general
- B60L7/10—Dynamic electric regenerative braking
- B60L7/18—Controlling the braking effect
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/40—Drive Train control parameters
- B60L2240/42—Drive Train control parameters related to electric machines
- B60L2240/423—Torque
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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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- 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
- B60W2540/12—Brake pedal position
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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
- B60W2710/00—Output or target parameters relating to a particular sub-units
- B60W2710/08—Electric propulsion units
- B60W2710/083—Torque
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- 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
- Y02T10/72—Electric energy management in electromobility
Abstract
The invention provides an energy recovery method and system for a hybrid vehicle. The energy recovery method comprises the following steps: acquiring vehicle state information in the running process of a vehicle, wherein the vehicle state information comprises pedal approach information and pedal opening information of an accelerator pedal and a brake pedal; judging the driving intention of the driver according to the vehicle state information; and recovering energy of the vehicle in a coasting state and a braking state according to a multi-gear energy recovery strategy according to the driving intention of the driver. The scheme of the invention can distinguish different working conditions, implement larger anti-drag torque under the condition that the speed is possibly reduced, implement smaller anti-drag torque under the condition that the speed is possibly reduced, and improve the energy recovery efficiency under the condition that the driving experience is not influenced as much as possible.
Description
Technical Field
The invention relates to the technical field of hybrid vehicles, in particular to an energy recovery method and system for a hybrid vehicle.
Background
The new energy vehicle driven by the motor generally has a braking energy recovery function, and the energy in the braking or inertial sliding process is converted into electric energy through the reverse dragging of the motor and stored in the storage battery, so that the electric quantity is saved, and the new energy vehicle has a very important function. Typical energy recovery schemes are:
1) energy recovery during the taxiing process. When the accelerator pedal is released, the motor enters a reverse-dragging state, and the reverse-dragging torque is usually a fixed value.
2) Energy recovery during braking. For a vehicle equipped with an electric control brake system, the reverse torque of a service brake and the reverse torque of a motor can be decoupled, and when a brake pedal is stepped down, the motor is preferentially reversely dragged, so that higher energy recovery efficiency is obtained. However, the electric control brake system is still in the primary stage of application at present, passenger vehicles are only equipped for individual vehicle types, commercial vehicles are mainly in the stage of sample vehicle verification, and the electric control brake system is high in cost and relatively far away from mass application. The current mainstream is still equipped with a conventional and non-electrically controlled brake system, the energy recovery in the braking process is similar to that in the sliding process, when a brake pedal is pressed down, the motor is reversely dragged, and the difference is that the motor reverse dragging torque in the braking process can be larger.
The braking energy recovery mode has the following defects in practical application: 1) only two gears of sliding and braking are adopted, and the device cannot adapt to complex and various working conditions. 2) The intention of a driver cannot be distinguished, so that the motor anti-dragging torque of the sliding cannot be set too large, otherwise, the sliding deceleration is too large, the operation and control of the driver on the vehicle are influenced, the situation that the accelerator pedal needs to be frequently stepped on and loosened is shown, the driving experience is poor, a rider is easy to feel sick, and on the contrary, if the motor anti-dragging torque is too small, the comfort is good, but the recovery efficiency is low.
Disclosure of Invention
One object of the present invention is to provide a multi-gear energy recovery strategy to adapt to complex and various working conditions.
Another object of the present invention is to determine a shift position for energy recovery according to a driver's intention, thereby improving ride comfort while improving recovery efficiency.
In particular, the present invention provides an energy recovery method for a hybrid vehicle, comprising the steps of:
acquiring vehicle state information in the running process of a vehicle, wherein the vehicle state information comprises pedal approach information and pedal opening information of an accelerator pedal and a brake pedal;
judging the driving intention of the driver according to the vehicle state information;
and recovering energy of the vehicle in a coasting state and a braking state according to a multi-gear energy recovery strategy according to the driving intention of the driver.
Optionally, in the step of recovering energy of the vehicle in a coasting state and a braking state according to a multi-gear energy recovery strategy according to the driving intention of the driver, the multi-gear energy recovery strategy comprises a first gear energy recovery strategy, a second gear energy recovery strategy, a third gear energy recovery strategy and a fourth gear energy recovery strategy;
and the motor back-dragging torque values of the first gear energy recovery strategy, the second gear energy recovery strategy, the third gear energy recovery strategy and the fourth gear energy recovery strategy are gradually increased.
Optionally, the determining the driving intention of the driver according to the vehicle state information includes: when the accelerator pedal is approached but not pressed down, judging that the driving intention is an intention for long-distance sliding and ready for acceleration at any time;
the method for recovering energy of a vehicle in a coasting state and a braking state according to a multi-gear energy recovery strategy according to the driving intention of the driver comprises the following steps: and when the driving intention is judged to be the intention of long-distance sliding and ready for acceleration at any time, recovering energy by the first gear energy recovery strategy.
Optionally, the determining the driving intention of the driver according to the vehicle state information includes: when the accelerator pedal is switched from being depressed to being approached, judging that the driving intention is the possibility of no acceleration demand but a deceleration demand;
the method for recovering energy of a vehicle in a coasting state and a braking state according to a multi-gear energy recovery strategy according to the driving intention of the driver comprises the following steps: and when the driving intention is judged to be the possibility of no acceleration demand but a deceleration demand, recovering energy by the second gear energy recovery strategy.
Optionally, the determining the driving intention of the driver according to the vehicle state information includes: when the brake pedal is changed from being approached to being released and the accelerator pedal is not approached, judging that the driving intention is the possibility of no braking demand but an acceleration demand;
the method for recovering energy of a vehicle in a coasting state and a braking state according to a multi-gear energy recovery strategy according to the driving intention of the driver comprises the following steps: and when the driving intention is judged to be no braking demand but the possibility of acceleration demand, recovering energy by the first gear energy recovery strategy.
Optionally, the determining the driving intention of the driver according to the vehicle state information includes: determining that the driving intent is ready to brake at any time when the brake pedal is approached but not depressed;
the method for recovering energy of a vehicle in a coasting state and a braking state according to a multi-gear energy recovery strategy according to the driving intention of the driver comprises the following steps: and when the driving intention is judged to be ready for braking at any time, recovering energy by using the third gear energy recovery strategy.
Optionally, the determining the driving intention of the driver according to the vehicle state information includes: when the brake pedal is stepped on, judging that the driving intention is to decelerate;
the method for recovering energy of a vehicle in a coasting state and a braking state according to a multi-gear energy recovery strategy according to the driving intention of the driver comprises the following steps: and when the driving intention is judged to be the requirement of deceleration, recovering energy by using the fourth gear energy recovery strategy.
In particular, the present invention provides an energy recovery system for a hybrid vehicle, comprising:
the device comprises an acquisition unit, a control unit and a control unit, wherein the acquisition unit is used for acquiring vehicle state information in the running process of a vehicle, and the vehicle state information comprises pedal approach information and pedal opening information of an accelerator pedal and a brake pedal;
a judging unit for judging the driving intention of the driver according to the vehicle state information;
and the energy recovery unit is used for recovering the energy of the vehicle in a coasting state and a braking state according to a multi-gear energy recovery strategy according to the driving intention of the driver.
Optionally, the obtaining unit includes:
the first inductive proximity switch is arranged on the accelerator pedal and used for detecting whether the accelerator pedal is approached or not so as to obtain pedal approach information of the accelerator pedal;
the second induction type proximity switch is arranged on the brake pedal and used for detecting whether the brake pedal is approached or not so as to obtain pedal approach information of the brake pedal;
an accelerator opening sensor for detecting opening information of the accelerator;
and the brake pedal opening sensor is used for detecting the opening information of the brake pedal.
Optionally, the multi-gear energy recovery strategy when the energy recovery unit recovers energy includes a first gear energy recovery strategy, a second gear energy recovery strategy, a third gear energy recovery strategy and a fourth gear energy recovery strategy;
and the motor back-dragging torque values of the first gear energy recovery strategy, the second gear energy recovery strategy, the third gear energy recovery strategy and the fourth gear energy recovery strategy are gradually increased.
According to the scheme of the embodiment of the invention, the energy of the vehicle in the sliding state and the braking state can be recovered according to the multi-gear energy recovery strategy according to the intention of the driver, so that different working conditions can be distinguished, a larger anti-dragging torque is implemented under the condition that the vehicle is possibly required to be decelerated, a smaller anti-dragging torque is implemented under the condition that the vehicle is possibly required to slide, and the energy recovery efficiency is improved under the condition that the driving experience is not influenced as much as possible.
In addition, a first induction type proximity switch is arranged on the accelerator pedal, a second induction type proximity switch is arranged on the brake pedal, so that pedal proximity information of the accelerator pedal and the brake pedal is detected, and the accelerator pedal opening degree sensor and the brake pedal opening degree sensor are sensors carried by the vehicle without redesign. Therefore, the scheme realizes that only one induction type proximity switch is needed to be added on the accelerator pedal and the brake pedal respectively on the basis of not changing the basic structure of the existing pedal, and the cost is increased less.
The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.
Drawings
Some specific embodiments of the invention will be described in detail hereinafter, by way of illustration and not limitation, with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:
FIG. 1 shows a schematic flow diagram of an energy recovery method for a hybrid vehicle according to one embodiment of the present invention;
fig. 2 shows a schematic configuration diagram of an energy recovery system for a hybrid vehicle according to an embodiment of the present invention.
Detailed Description
Fig. 1 shows a schematic flow diagram of an energy recovery method for a hybrid vehicle according to one embodiment of the invention. As shown in fig. 1, the energy recovery method includes:
step S100, obtaining vehicle state information in the vehicle running process, wherein the vehicle state information comprises pedal approach information and pedal opening information of an accelerator pedal and a brake pedal;
step S200, judging the driving intention of the driver according to the vehicle state information;
and step S300, recovering energy of the vehicle in a coasting state and a braking state according to a multi-gear energy recovery strategy according to the driving intention of the driver.
In step S100, pedal approach information is output in the form of 0 and 1, the output of 0 representing that the driver' S foot is not on the pedal, i.e., the pedal is not approached. An output of 1 represents the driver's foot on the pedal, i.e. the pedal is approached. The pedal opening information is output by any value of 0 and 0-1, the output of 0 represents that the pedal is pressed, and the output of 0-1 represents that the pedal is pressed.
In step S200, the accelerator pedal opening signal is 0 and the accelerator approach signal is 1, at which time the accelerator pedal is released but the foot is still on the accelerator pedal, and the driving intention is to coast for a long distance and to be ready for acceleration at any time. The accelerator pedal approach signal changes from 1 to 0 and the brake pedal approach signal is 0, at which time the accelerator pedal has been released, the foot is neither on the accelerator pedal nor on the brake pedal, and the driving intent should be no demand for acceleration, possibly in preparation for deceleration. The brake pedal approach signal changes from 1 to 0 and the accelerator pedal approach signal is 0, at which time the brake pedal is released, the foot is neither on the brake pedal nor on the accelerator pedal, and the driving intent is to have no braking demand, possibly in preparation for acceleration. The brake pedal opening signal is 0, the brake pedal approach signal is 1, and at this time, the driver intends to prepare for braking at any time when the driver presses the brake pedal but does not press the brake pedal. The opening degree signal of the brake pedal is larger than 0, and the brake pedal is stepped on at the moment, so that the speed is required to be reduced.
In step S300, the multi-gear energy recovery strategy includes a first gear energy recovery strategy, a second gear energy recovery strategy, a third gear energy recovery strategy, and a fourth gear energy recovery strategy;
and the motor back-dragging torque values of the first gear energy recovery strategy, the second gear energy recovery strategy, the third gear energy recovery strategy and the fourth gear energy recovery strategy are gradually increased.
When the driving intention is to slide for a long distance and prepare for acceleration at any time, energy is recovered by a first gear energy recovery strategy, and smaller anti-dragging torque is implemented. The driving intent is no acceleration demand, and may be in preparation for deceleration, with energy recovery strategy in the second gear, implementing moderate anti-drag torque. The driving intent is no braking demand and may be ready for acceleration, with a first gear energy recovery strategy to recover energy and implement a smaller anti-drag torque. When the driving intention is to prepare for braking at any time, energy is recovered by a third gear energy recovery strategy, and large anti-dragging torque is implemented. When the driving intention is that the speed needs to be reduced, energy is recovered by a fourth gear energy recovery strategy, and larger anti-dragging torque is implemented.
When the accelerator opening signal is greater than 0, the accelerator is pressed down at this time, the vehicle normally runs, and energy recovery is not performed.
In addition, the intention of a driver is judged according to signals of an accelerator pedal and a brake pedal, and then before different energy recovery strategies are adopted, the method further comprises the steps of obtaining the speed, the current gear of the vehicle and the SOC of a battery, judging whether the conditions of energy recovery are met, and if the conditions are met, executing the energy recovery method.
According to the scheme of the embodiment of the invention, the energy of the vehicle in the sliding state and the braking state can be recovered according to the multi-gear energy recovery strategy according to the intention of the driver, so that different working conditions can be distinguished, a larger anti-dragging torque is implemented under the condition that the vehicle is possibly required to be decelerated, a smaller anti-dragging torque is implemented under the condition that the vehicle is possibly required to slide, and the energy recovery efficiency is improved under the condition that the driving experience is not influenced as much as possible.
In particular, as shown in fig. 2, the present invention also provides an energy recovery system of a hybrid vehicle, which includes an acquisition unit 1, a determination unit 2, and an energy recovery unit 3. The acquiring unit 1 is used for acquiring vehicle state information during vehicle running, wherein the vehicle state information comprises pedal approach information and pedal opening information of an accelerator pedal and a brake pedal. The determination unit 2 is configured to determine the driving intention of the driver from the vehicle state information. The energy recovery unit 3 is used for recovering energy of the vehicle in a coasting state and a braking state according to a multi-gear energy recovery strategy according to the driving intention of the driver.
The acquisition unit 1 includes a first inductive proximity switch, a second inductive proximity switch, an accelerator pedal opening degree sensor, and a brake pedal opening degree sensor. The first inductive proximity switch is arranged on the accelerator pedal and used for detecting whether the accelerator pedal is approached or not so as to obtain pedal approach information of the accelerator pedal. The second inductive proximity switch is arranged on the brake pedal and used for detecting whether the brake pedal is approached or not so as to obtain pedal approach information of the brake pedal. The accelerator opening sensor is used for detecting opening information of the accelerator. The brake pedal opening degree sensor is used for detecting opening degree information of the brake pedal. The accelerator pedal opening degree sensor and the brake pedal opening degree sensor are sensors carried by the vehicle.
Other features of the energy recovery system correspond to those of the energy recovery method one to one, and are not described herein again.
According to the scheme of the invention, the first inductive proximity switch is arranged on the accelerator pedal, and the second inductive proximity switch is arranged on the brake pedal, so that the detection of the pedal proximity information of the accelerator pedal and the brake pedal is realized, and the accelerator pedal opening degree sensor and the brake pedal opening degree sensor are sensors carried by a vehicle without redesigning. Therefore, the scheme realizes that only one induction type proximity switch is needed to be added on the accelerator pedal and the brake pedal respectively on the basis of not changing the basic structure of the existing pedal, and the cost is increased less.
Thus, it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been illustrated and described in detail herein, many other variations or modifications consistent with the principles of the invention may be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the invention. Accordingly, the scope of the invention should be understood and interpreted to cover all such other variations or modifications.
Claims (7)
1. An energy recovery method for a hybrid vehicle, characterized by comprising the steps of:
acquiring vehicle state information in the running process of a vehicle, wherein the vehicle state information comprises pedal approach information and pedal opening information of an accelerator pedal and a brake pedal;
judging the driving intention of the driver according to the vehicle state information;
recovering energy of a vehicle in a sliding state and a braking state according to the driving intention of the driver and a multi-gear energy recovery strategy;
in the step of recovering the energy of the vehicle in a sliding state and a braking state according to the driving intention of the driver and a multi-gear energy recovery strategy, the multi-gear energy recovery strategy comprises a first gear energy recovery strategy, a second gear energy recovery strategy, a third gear energy recovery strategy and a fourth gear energy recovery strategy;
the motor back-dragging torque values of the first gear energy recovery strategy, the second gear energy recovery strategy, the third gear energy recovery strategy and the fourth gear energy recovery strategy are gradually increased;
the judging of the driving intention of the driver according to the vehicle state information comprises the following steps: when the accelerator pedal is approached but not pressed down, judging that the driving intention is an intention for long-distance sliding and ready for acceleration at any time;
the method for recovering the energy of the vehicle in a coasting state and a braking state according to the driving intention of the driver and a multi-gear energy recovery strategy comprises the following steps: and when the driving intention is judged to be the intention of long-distance sliding and ready for acceleration at any time, recovering energy by the first gear energy recovery strategy.
2. The energy recovery method according to claim 1, wherein the determining the driving intention of the driver from the vehicle state information includes: when the accelerator pedal is switched from being depressed to being approached, judging that the driving intention is the possibility of no acceleration demand but a deceleration demand;
the method for recovering the energy of the vehicle in a coasting state and a braking state according to the driving intention of the driver and a multi-gear energy recovery strategy comprises the following steps: and when the driving intention is judged to be the possibility of no acceleration demand but a deceleration demand, recovering energy by the second gear energy recovery strategy.
3. The energy recovery method according to claim 1, wherein the determining the driving intention of the driver from the vehicle state information includes: when the brake pedal is changed from being approached to being released and the accelerator pedal is not approached, judging that the driving intention is the possibility of no braking demand but an acceleration demand;
the method for recovering the energy of the vehicle in a coasting state and a braking state according to the driving intention of the driver and a multi-gear energy recovery strategy comprises the following steps: and when the driving intention is judged to be no braking demand but the possibility of acceleration demand, recovering energy by the first gear energy recovery strategy.
4. The energy recovery method according to claim 1, wherein the determining the driving intention of the driver from the vehicle state information includes: determining that the driving intent is ready to brake at any time when the brake pedal is approached but not depressed;
the method for recovering the energy of the vehicle in a coasting state and a braking state according to the driving intention of the driver and a multi-gear energy recovery strategy comprises the following steps: and when the driving intention is judged to be ready for braking at any time, recovering energy by using the third gear energy recovery strategy.
5. The energy recovery method according to any one of claims 1 to 4, wherein the determining the driving intention of the driver from the vehicle state information includes: when the brake pedal is stepped on, judging that the driving intention is to decelerate;
the method for recovering the energy of the vehicle in a coasting state and a braking state according to the driving intention of the driver and a multi-gear energy recovery strategy comprises the following steps: and when the driving intention is judged to be the requirement of deceleration, recovering energy by using the fourth gear energy recovery strategy.
6. An energy recovery system for a hybrid vehicle, comprising:
the device comprises an acquisition unit, a control unit and a control unit, wherein the acquisition unit is used for acquiring vehicle state information in the running process of a vehicle, and the vehicle state information comprises pedal approach information and pedal opening information of an accelerator pedal and a brake pedal;
a judging unit for judging the driving intention of the driver according to the vehicle state information;
the energy recovery unit is used for recovering energy of a vehicle in a sliding state and a braking state according to a multi-gear energy recovery strategy according to the driving intention of the driver;
when the energy recovery unit recovers energy, the multi-gear energy recovery strategy comprises a first gear energy recovery strategy, a second gear energy recovery strategy, a third gear energy recovery strategy and a fourth gear energy recovery strategy;
the motor back-dragging torque values of the first gear energy recovery strategy, the second gear energy recovery strategy, the third gear energy recovery strategy and the fourth gear energy recovery strategy are gradually increased;
the judging unit is used for judging that the driving intention is an intention for long-distance sliding and ready for acceleration at any time when the accelerator pedal is approached but not stepped;
the energy recovery module is used for recovering energy according to the first gear energy recovery strategy when the driving intention is judged to be an intention of long-distance sliding and ready for acceleration at any time.
7. The energy recovery system of claim 6, wherein the capture unit comprises:
the first inductive proximity switch is arranged on the accelerator pedal and used for detecting whether the accelerator pedal is approached or not so as to obtain pedal approach information of the accelerator pedal;
the second induction type proximity switch is arranged on the brake pedal and used for detecting whether the brake pedal is approached or not so as to obtain pedal approach information of the brake pedal;
an accelerator opening sensor for detecting opening information of the accelerator;
and the brake pedal opening sensor is used for detecting the opening information of the brake pedal.
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| CN112373315B (en) * | 2020-11-23 | 2022-04-22 | 安徽江淮汽车集团股份有限公司 | Energy recovery method, device, equipment and storage medium |
| CN112498115B (en) * | 2020-12-07 | 2022-08-12 | 中国第一汽车股份有限公司 | Braking energy recovery method, braking energy recovery device and vehicle |
| CN114572009A (en) * | 2022-03-10 | 2022-06-03 | 盐城工学院 | Braking energy recovery system of hybrid vehicle and braking energy recovery method thereof |
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Effective date of registration: 20211130 Address after: Room 612, building 1, 1760 Jiangling Road, Binjiang District, Hangzhou City, Zhejiang Province Patentee after: ZHEJIANG GEELY NEW ENERGY COMMERCIAL VEHICLE GROUP Co.,Ltd. Patentee after: GEELY SICHUAN COMMERCIAL VEHICLE Co.,Ltd. Patentee after: JIANGXI GEELY NEW ENERGY COMMERCIAL VEHICLE Co.,Ltd. Patentee after: Zhejiang remote commercial vehicle R & D Co.,Ltd. Patentee after: ZHEJIANG GEELY HOLDING GROUP Co.,Ltd. Address before: Room 612, building 1, 1760 Jiangling Road, Binjiang District, Hangzhou City, Zhejiang Province Patentee before: ZHEJIANG GEELY NEW ENERGY COMMERCIAL VEHICLE GROUP Co.,Ltd. Patentee before: GEELY SICHUAN COMMERCIAL VEHICLE Co.,Ltd. Patentee before: JIANGXI GEELY NEW ENERGY COMMERCIAL VEHICLE Co.,Ltd. Patentee before: ZHEJIANG GEELY HOLDING GROUP Co.,Ltd. |