CN114161938B - Electric automobile energy recovery method and electronic equipment - Google Patents
Electric automobile energy recovery method and electronic equipment Download PDFInfo
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- CN114161938B CN114161938B CN202010944718.1A CN202010944718A CN114161938B CN 114161938 B CN114161938 B CN 114161938B CN 202010944718 A CN202010944718 A CN 202010944718A CN 114161938 B CN114161938 B CN 114161938B
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- 238000011084 recovery Methods 0.000 title claims abstract description 523
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- 230000008859 change Effects 0.000 abstract description 7
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- 238000004064 recycling Methods 0.000 description 6
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Classifications
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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
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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 discloses an electric automobile energy recovery method and electronic equipment, wherein the method comprises the following steps: acquiring pedal information of the electric automobile; acquiring a pedal output torque relationship; obtaining a pedal demand torque of a driver according to pedal information and a pedal output torque relation; determining a recuperation torque according to the driver pedal demand torque and a current recuperation coefficient set by the user; and controlling a motor of the electric automobile to recover the sliding energy by adopting the recovery torque. According to the invention, the recovery coefficient set by the user is introduced into the torque chain for calculating the recovery torque, so that the user can set the recovery coefficient by himself, the final recovery torque is adjusted, the recovery strength of the electric automobile can be finely adjusted by the user, the drivability coverage is wider, and each user can customize the recovery strength of the automobile. On the basis of not increasing the Pedal Map, the recovery strength is increased or reduced by increasing the recovery coefficient, so that the energy recovery strength of the electric automobile achieves the stepless speed change effect.
Description
Technical Field
The invention relates to the technical field of automobiles, in particular to an electric automobile energy recovery method and electronic equipment.
Background
The energy recovery of the electric automobile is a main factor for improving the energy efficiency of the electric automobile, and the energy recovery system is a great characteristic of the electric automobile, which is different from a fuel oil vehicle. In a conventional fuel vehicle, when the vehicle passes through a braking system, the friction heat generation causes that the friction generates capacity is converted into heat energy to be emitted, and in an electric vehicle, when driving is stopped, the wheels of the vehicle drive a motor to be converted into a generator to charge a storage battery, so that energy recovery is realized, and the cruising capacity is greatly increased.
The single Pedal (One Pedal) is based on series braking, adopts One Pedal to control two processes of acceleration and deceleration, can meet the daily majority of vehicle operation, and is only intervened when the deceleration of the single Pedal can not meet the deceleration intention of a driver.
However, the existing electric automobile energy recovery also sacrifices the comfort of partial driving while recovering the energy, and almost all new energy electric automobiles in the market at present only recover two grades of energy in a strong and weak way, and the two recovery strengths cannot cover more driving conditions. If more recovery strength is required, more additional Pedal output torque relationships (Pedal Maps) are required, which can have two effects, the first is to increase a large number of calibration jobs, and the second is that even if a large number of Pedal Maps are added, the calibration results are still limited and cannot meet the custom requirements of all users.
Disclosure of Invention
Based on this, it is necessary to provide an electric vehicle energy recovery method and an electronic device, which are directed against the technical problem that the electric vehicle energy recovery technology in the prior art cannot meet the user customization demand.
The invention provides an energy recovery method of an electric automobile, which comprises the following steps:
acquiring pedal information of the electric automobile;
acquiring a pedal output torque relationship;
obtaining a pedal demand torque of a driver according to the pedal information and the pedal output torque relation;
determining a recovery torque according to the driver pedal demand torque and a current recovery coefficient set by a user;
and controlling a motor of the electric automobile to recover the sliding energy by adopting the recovery torque.
According to the invention, the recovery coefficient set by the user is introduced into the torque chain for calculating the recovery torque, so that the user can set the recovery coefficient by himself, the final recovery torque is adjusted, the recovery strength of the electric automobile can be finely adjusted by the user, the drivability coverage is wider, and each user can customize the recovery strength of the automobile. On the basis of not increasing the Pedal Map, the recovery strength is increased or reduced by increasing the recovery coefficient, so that the energy recovery strength of the electric automobile achieves the stepless speed change effect.
Further, the method further comprises the following steps:
responding to a recovery coefficient adjustment request, and acquiring a demand recovery intensity coefficient input by a user;
according to the corresponding relation between the required recovery intensity coefficient and the recovery coefficient, determining the recovery coefficient corresponding to the required recovery intensity coefficient input by the user as the current recovery coefficient;
and saving the current recovery coefficient.
According to the embodiment, the recovery intensity coefficient of the demand input by the user is changed into the corresponding recovery coefficient, so that the recovery coefficient can adapt to the torque demand of the electric automobile.
Still further, the method further comprises:
obtaining the maximum hardware recovery torque of the electric automobile and the maximum relation recovery torque of the pedal output torque relation;
calculating a maximum recovery coefficient according to the maximum hardware recovery torque of the electric automobile and the maximum relation recovery torque of the pedal output torque relation;
and establishing a corresponding relation between the required recovery intensity coefficient and the recovery coefficient by using the maximum allowable value of the required recovery intensity coefficient corresponding to the maximum recovery coefficient.
According to the embodiment, the maximum recovery coefficient is determined based on the maximum relation recovery torque of the maximum hardware recovery torque and the pedal output torque relation of the electric automobile, and the corresponding relation between the required recovery strength coefficient and the recovery coefficient is established, so that the condition that the required recovery strength coefficient set by a user exceeds the maximum recovery torque of the automobile is avoided.
Still further, the method includes a plurality of corresponding relations between the required recovery intensity coefficient and the recovery coefficient corresponding to the recovery mode, and determining, according to the corresponding relation between the required recovery intensity coefficient and the recovery coefficient, the recovery coefficient corresponding to the required recovery intensity coefficient input by the user as the current recovery coefficient specifically includes:
acquiring a current recovery mode of the electric automobile;
and determining the recovery coefficient corresponding to the demand recovery intensity coefficient input by the user as the current recovery coefficient according to the corresponding relation between the demand recovery intensity coefficient corresponding to the current recovery mode and the recovery coefficient.
In this embodiment, the corresponding relationship between the recovery strength coefficient and the recovery coefficient is set according to different recovery modes, so that the calculated recovery coefficient can meet the requirements of different recovery modes.
Still further, a plurality of pedal output torque relationships corresponding to the recovery mode are included:
the obtaining the maximum hardware recovery torque of the electric automobile and the maximum relation recovery torque of the pedal output torque relation specifically includes: obtaining the maximum recovery torque of the electric automobile in each recovery mode and the maximum relation recovery torque of the pedal output torque relation corresponding to each recovery mode;
the calculating the maximum recovery coefficient according to the maximum hardware recovery torque of the electric automobile and the maximum relation recovery torque of the pedal output torque relation specifically comprises: for each recovery mode, calculating a maximum recovery coefficient corresponding to the recovery mode according to the maximum hardware recovery torque of the electric automobile in the recovery mode and the maximum relation recovery torque of the pedal output torque relation corresponding to the recovery mode;
the method for establishing the corresponding relation between the required recovery intensity coefficient and the recovery coefficient by using the maximum allowable value of the required recovery intensity coefficient corresponding to the maximum recovery coefficient specifically comprises the following steps: for each recovery mode, establishing a corresponding relation between the required recovery intensity coefficient and the recovery coefficient corresponding to the recovery mode according to the maximum allowable value of the required recovery intensity coefficient corresponding to the recovery mode.
The present embodiment satisfies the maximum hardware reclaiming torque in different reclaiming modes.
Still further, the establishing a correspondence between the required recovery intensity coefficient and the recovery coefficient by using the maximum recovery coefficient to correspond to the maximum allowable value of the required recovery intensity coefficient specifically includes:
acquiring a preset minimum recovery coefficient;
and establishing a corresponding relation between the required recovery intensity coefficient and the recovery coefficient by using the maximum recovery coefficient to correspond to the maximum allowable value of the required recovery intensity coefficient and using the minimum recovery coefficient to correspond to the minimum allowable value of the required recovery intensity coefficient.
The minimum recovery coefficient is set, so that the recovery coefficient can adapt to the torque requirement of the electric automobile.
Still further, the recovery torque is a product of the driver pedal demand torque and the current recovery factor, the minimum recovery factor is greater than 0, and the minimum allowable value of the demand recovery strength factor is 0.
In this embodiment, when the minimum allowable value of the required recovery intensity coefficient is 0, the corresponding minimum recovery coefficient is ensured to be greater than 0, so as to avoid error calculation of recovery torque.
Further, the responding to the recycling coefficient adjustment request obtains the recycling strength coefficient of the demand input by the user, which specifically includes:
responding to a recovery coefficient adjustment request, and displaying a required recovery intensity coefficient input interface;
and if the demand recovery intensity coefficient input by the user in the input interface is unchanged in the preset time, storing the demand recovery intensity coefficient input by the user.
According to the embodiment, when the demand recovery intensity coefficient is unchanged in the preset time, the demand recovery intensity coefficient input by the user is stored, and the unstable running of the vehicle caused by too fast adjustment of the demand recovery intensity coefficient by the user is avoided.
Still further, the determining the recovery torque according to the driver pedal demand torque and a current recovery coefficient set by a user specifically includes:
detecting whether a recovery adjustment function is started, if the recovery adjustment function is started, determining recovery torque according to the driver pedal demand torque and a current recovery coefficient set by a user, otherwise, taking the driver pedal demand torque as the recovery torque.
According to the embodiment, when the recovery adjusting function is started, the recovery torque is determined according to the driver pedal demand torque and the current recovery coefficient set by the user, and when the recovery adjusting function is closed, the driver pedal demand torque is used as the recovery torque, so that the user can comprehensively control the recovery intensity.
The invention provides an electric automobile energy recovery electronic device, which comprises:
at least one processor; the method comprises the steps of,
a memory communicatively coupled to at least one of the processors; wherein,
the memory stores instructions executable by at least one of the processors to enable the at least one processor to perform the electric vehicle energy recovery method as previously described.
According to the invention, the recovery coefficient set by the user is introduced into the torque chain for calculating the recovery torque, so that the user can set the recovery coefficient by himself, the final recovery torque is adjusted, the recovery strength of the electric automobile can be finely adjusted by the user, the drivability coverage is wider, and each user can customize the recovery strength of the automobile. On the basis of not increasing the Pedal Map, the recovery strength is increased or reduced by increasing the recovery coefficient, so that the energy recovery strength of the electric automobile achieves the stepless speed change effect.
Drawings
FIG. 1 is a flow chart of an electric vehicle energy recovery method of the present invention;
FIG. 2 is a flowchart showing an energy recovery method for an electric vehicle according to a preferred embodiment of the present invention;
fig. 3 is a schematic hardware structure of an electric vehicle energy recovery electronic device according to the present invention.
Detailed Description
The invention will now be described in further detail with reference to the drawings and to specific examples.
Fig. 1 is a working flow chart of an energy recovery method of an electric automobile, which comprises the following steps:
step S101, pedal information of an electric automobile is obtained;
step S102, obtaining a pedal output torque relation;
step S103, obtaining the pedal demand torque of a driver according to the pedal information and the pedal output torque relation;
step S104, determining recovery torque according to the driver pedal demand torque and the current recovery coefficient set by a user;
step S105, controlling the motor of the electric vehicle to recover the sliding energy by using the recovery torque.
Specifically, the present embodiment can be applied to an electronic control unit (Electronic Control Unit, ECU) of an electric vehicle. When the electric vehicle performs energy recovery, for example, the energy recovery function is turned on, pedal information of the electric vehicle is monitored unless step S101. Pedal information includes, but is not limited to, accelerator pedal opening, accelerator pedal speed, and the like. Step S102 is then performed to acquire a pedal output torque relationship. The Pedal output torque relationship is preferably a preset Pedal Map. The relationship between Pedal information and driver Pedal demand torque is set in the Pedal Map. After the Pedal information acquired in step S101 is input to the peak Map, the driver Pedal demand torque is obtained. Step S104 is then performed to determine a recuperation torque based on the driver pedal demand torque and a current recuperation coefficient set by the user. Specifically, the recovery torque is the product of the driver pedal demand torque and the current recovery factor. Finally, step S105 performs slip energy recovery according to the recovery torque.
According to the invention, the recovery coefficient set by the user is introduced into the torque chain for calculating the recovery torque, so that the user can set the recovery coefficient by himself, the final recovery torque is adjusted, the recovery strength of the electric automobile can be finely adjusted by the user, the drivability coverage is wider, and each user can customize the recovery strength of the automobile. On the basis of not increasing the Pedal Map, the recovery strength is increased or reduced by increasing the recovery coefficient, so that the energy recovery strength of the electric automobile achieves the stepless speed change effect.
In one embodiment, the method further comprises:
responding to a recovery coefficient adjustment request, and acquiring a demand recovery intensity coefficient input by a user;
according to the corresponding relation between the required recovery intensity coefficient and the recovery coefficient, determining the recovery coefficient corresponding to the required recovery intensity coefficient input by the user as the current recovery coefficient;
and saving the current recovery coefficient.
Specifically, on the basis of the existing vehicle, a user demand recycling intensity adjustment input end, such as a gear level or an on-vehicle central control screen, is defined. When the user demand recovery intensity adjustment input end is triggered, a recovery coefficient adjustment request is generated, and the demand recovery intensity coefficient input by the user is obtained.
The user entered demand recovery intensity factor is not the final recovery factor. Because the torque of the electric automobile itself is limited, but the torque of the automobile itself is not clear to the user, if the recovery coefficient is directly input by the user, the recovery coefficient cannot be correctly input by the user. Therefore, a correspondence relationship between the required recovery intensity coefficient and the recovery coefficient is established. The required recovery intensity coefficient is selected by a user in a manner which can be clearly understood by the user, for example, the required recovery intensity coefficient is set to be in the range of 0-1, or is set to be a user-adjusted recovery progress bar, so that the user can select better. And then, converting the demand recovery intensity coefficient input by the user into a recovery coefficient which meets the torque demand of the electric automobile through the corresponding relation between the demand recovery intensity coefficient and the recovery coefficient.
According to the embodiment, the recovery intensity coefficient of the demand input by the user is changed into the corresponding recovery coefficient, so that the recovery coefficient can adapt to the torque demand of the electric automobile.
In one embodiment, the method further comprises:
obtaining the maximum hardware recovery torque of the electric automobile and the maximum relation recovery torque of the pedal output torque relation;
calculating a maximum recovery coefficient according to the maximum hardware recovery torque of the electric automobile and the maximum relation recovery torque of the pedal output torque relation;
and establishing a corresponding relation between the required recovery intensity coefficient and the recovery coefficient by using the maximum allowable value of the required recovery intensity coefficient corresponding to the maximum recovery coefficient.
Specifically, the maximum recovery factor is the quotient of the maximum hardware recovery torque divided by the maximum relationship recovery torque.
As an example, if the maximum hardware recovery torque of an electric vehicle is, for example, -500Nm, and the maximum recovery torque of the peak Map is-300 Nm, the maximum recovery coefficient is-500/-300=1.67. And if the maximum recovery coefficient 1.67 corresponds to the maximum allowable value 1 of the required recovery intensity coefficient, the corresponding relationship between the required recovery intensity coefficient and the recovery coefficient can be established by an interpolation method, for example.
According to the embodiment, the maximum recovery coefficient is determined based on the maximum relation recovery torque of the maximum hardware recovery torque and the pedal output torque relation of the electric automobile, and the corresponding relation between the required recovery strength coefficient and the recovery coefficient is established, so that the condition that the required recovery strength coefficient set by a user exceeds the maximum recovery torque of the automobile is avoided.
In one embodiment, the method includes a plurality of corresponding relations between the required recovery intensity coefficient and the recovery coefficient corresponding to the recovery mode, and determining, according to the corresponding relation between the required recovery intensity coefficient and the recovery coefficient, the recovery coefficient corresponding to the required recovery intensity coefficient input by the user as the current recovery coefficient specifically includes:
acquiring a current recovery mode of the electric automobile;
and determining the recovery coefficient corresponding to the demand recovery intensity coefficient input by the user as the current recovery coefficient according to the corresponding relation between the demand recovery intensity coefficient corresponding to the current recovery mode and the recovery coefficient.
Specifically, the electric vehicle generally includes a strong recovery mode and a weak recovery mode, and the corresponding relationship between the corresponding required recovery intensity coefficient and the recovery coefficient can be determined according to the strong recovery mode and the weak recovery mode, respectively.
In this embodiment, the corresponding relationship between the recovery strength coefficient and the recovery coefficient is set according to different recovery modes, so that the calculated recovery coefficient can meet the requirements of different recovery modes.
In one embodiment, a plurality of pedal output torque relationships corresponding to the recovery mode are included:
the obtaining the maximum hardware recovery torque of the electric automobile and the maximum relation recovery torque of the pedal output torque relation specifically includes: obtaining the maximum recovery torque of the electric automobile in each recovery mode and the maximum relation recovery torque of the pedal output torque relation corresponding to each recovery mode;
the calculating the maximum recovery coefficient according to the maximum hardware recovery torque of the electric automobile and the maximum relation recovery torque of the pedal output torque relation specifically comprises: for each recovery mode, calculating a maximum recovery coefficient corresponding to the recovery mode according to the maximum hardware recovery torque of the electric automobile in the recovery mode and the maximum relation recovery torque of the pedal output torque relation corresponding to the recovery mode;
the method for establishing the corresponding relation between the required recovery intensity coefficient and the recovery coefficient by using the maximum allowable value of the required recovery intensity coefficient corresponding to the maximum recovery coefficient specifically comprises the following steps: for each recovery mode, establishing a corresponding relation between the required recovery intensity coefficient and the recovery coefficient corresponding to the recovery mode according to the maximum allowable value of the required recovery intensity coefficient corresponding to the recovery mode.
Specifically, according to the inherent attribute of the three-electric system hardware of the whole vehicle, the maximum hardware recovery torque under different recovery modes is determined. Meanwhile, different Pedal maps are set in different recovery modes, so that the maximum recovery coefficient is determined according to the maximum hardware recovery torque and the maximum relation recovery torque in different modes.
The present embodiment satisfies the maximum hardware reclaiming torque in different reclaiming modes.
In one embodiment, the establishing the correspondence between the required recovery intensity coefficient and the recovery coefficient by using the maximum recovery coefficient to correspond to the maximum allowable value of the required recovery intensity coefficient specifically includes:
acquiring a preset minimum recovery coefficient;
and establishing a corresponding relation between the required recovery intensity coefficient and the recovery coefficient by using the maximum recovery coefficient to correspond to the maximum allowable value of the required recovery intensity coefficient and using the minimum recovery coefficient to correspond to the minimum allowable value of the required recovery intensity coefficient.
The minimum recovery coefficient is set, so that the recovery coefficient can adapt to the torque requirement of the electric automobile.
In one embodiment, the recovery torque is a product of the driver pedal demand torque and the current recovery factor, the minimum recovery factor is greater than 0, and the minimum allowable value of the demand recovery intensity factor is 0.
As an example, if the maximum recovery coefficient is 1.67 and the minimum recovery coefficient is 0.1 and the required recovery strength coefficient is [0,1], the correspondence between the required recovery strength coefficient and the recovery coefficient is shown in table 1:
TABLE 1 correspondence table of demand recovery intensity coefficient and recovery coefficient
| x | 0 | 0.1 | 0.2 | 0.3 | 0.4 | 0.5 | 0.6 | 0.7 | 0.8 | 0.9 | 1 |
| z | 0.1 | 0.16 | 0.33 | 0.5 | 0.67 | 0.84 | 1 | 1.17 | 1.33 | 1.5 | 1.67 |
Wherein x is a required recovery intensity coefficient, and z is a corresponding recovery coefficient.
In this example, the interval of the required recovery intensity coefficient and the interval of the recovery coefficient are each divided into 10 sub-intervals, so that each sub-interval of the required recovery intensity coefficient corresponds to each sub-interval of the recovery coefficient.
In this embodiment, when the minimum allowable value of the required recovery intensity coefficient is 0, the corresponding minimum recovery coefficient is ensured to be greater than 0, so as to avoid error calculation of recovery torque.
In one embodiment, the obtaining, in response to the recycling factor adjustment request, the recycling intensity factor of the demand input by the user specifically includes:
responding to a recovery coefficient adjustment request, and displaying a required recovery intensity coefficient input interface;
and if the demand recovery intensity coefficient input by the user in the input interface is unchanged in the preset time, storing the demand recovery intensity coefficient input by the user.
Specifically, on the basis of the existing vehicle, a user demand recycling intensity adjustment input end, such as a gear level or an on-vehicle central control screen, is defined. When the user demand recovery intensity adjustment input end is triggered, a recovery coefficient adjustment request is generated, and the demand recovery intensity coefficient input by the user is obtained. The required recovery intensity factor input interface may be an input box for the user to input numbers. The demand recovery intensity coefficient input interface may also be a user adjustment recovery progress bar, allowing the user to drag the progress bar to select the demand recovery intensity coefficient.
Meanwhile, the input delay time is defined, namely, how long the recovery intensity coefficient of the user needs is kept unchanged is determined to be effective, and the problem that the vehicle is unstable and the safety risk is caused by updating the recovery intensity coefficient of the user needs in real time is avoided.
According to the embodiment, when the demand recovery intensity coefficient is unchanged in the preset time, the demand recovery intensity coefficient input by the user is stored, and the unstable running of the vehicle caused by too fast adjustment of the demand recovery intensity coefficient by the user is avoided.
In one embodiment, the determining the recovery torque according to the driver pedal demand torque and the current recovery coefficient set by the user specifically includes:
detecting whether a recovery adjustment function is started, if the recovery adjustment function is started, determining recovery torque according to the driver pedal demand torque and a current recovery coefficient set by a user, otherwise, taking the driver pedal demand torque as the recovery torque.
According to the embodiment, when the recovery adjusting function is started, the recovery torque is determined according to the driver pedal demand torque and the current recovery coefficient set by the user, and when the recovery adjusting function is closed, the driver pedal demand torque is used as the recovery torque, so that the user can comprehensively control the recovery intensity.
Fig. 2 is a flowchart showing an energy recovery method for an electric vehicle according to a preferred embodiment of the present invention, including:
step S201, responding to a recovery coefficient adjustment request, and acquiring a demand recovery intensity coefficient input by a user;
step S202, determining a recovery coefficient corresponding to the required recovery intensity coefficient input by a user as a current recovery coefficient according to the corresponding relation between the required recovery intensity coefficient and the recovery coefficient;
step S203, the current recovery coefficient is saved;
step S204, when the automobile enters a sliding energy recovery mode, pedal information of the electric automobile is obtained;
step S205, obtaining a pedal output torque relation;
step S206, obtaining the pedal demand torque of the driver according to the pedal information and the pedal output torque relation;
step S207, if a user starts a recovery adjustment function, determining recovery torque according to the driver pedal demand torque and a current recovery coefficient, otherwise, taking the driver pedal demand torque as recovery torque;
and step S208, controlling a motor of the electric automobile to recover the sliding energy by adopting the recovery torque.
According to the embodiment, the quantity of PedalMaps is kept unchanged, original calibration data are unchanged, the recovery intensity coefficient is increased, the required torque of the pedal of a driver is multiplied by a newly-increased variable recovery coefficient CarRecFac on the basis of an original torque chain, the coefficient can be changed along with the change of a user-adjusted recovery progress bar, and a calibration engineer needs to calibrate the corresponding recovery intensity coefficient during strong and weak recovery respectively, so that good driving experience is ensured.
Meanwhile, the mapping relation between the recovery intensity and the recovery intensity coefficient required by the driver is required to be calibrated. Specifically:
1. on the basis of the existing vehicle-mounted machine, defining a user demand recovery intensity adjustment input end, such as a gear level or a vehicle-mounted large screen, and controlling a user demand recovery intensity coefficient by adjusting a recovery progress bar;
2. defining input delay time, namely, how long the recovery intensity coefficient is required to be kept unchanged by a user, and determining the recovery intensity coefficient to be valid (if the coefficient is updated in real time, the vehicle is unstable and has safety risk);
3. on the basis of the existing two recovery strengths, defining respective maximum recovery torque according to the inherent attribute of the three-electric system hardware of the whole vehicle;
4. defining respective different maximum recovery coefficients of the existing two recovery modes according to the maximum recovery torque (i.e., if the maximum recovery torque of the strong recovery is, for example, -500Nm, the maximum recovery torque of the existing strong recovery PedalMap, -300Nm, then the mode maximum recovery coefficient is-500/-300=1.67);
5. defining a mapping relation between a demand recovery intensity coefficient input by a user and a real recovery coefficient multiplied into a torque chain as shown in table 1, and determining a corresponding real recovery coefficient according to the demand recovery intensity coefficient;
6. defining a recovery intensity adjustable function switch;
when the switch is turned on, the recovery intensity is required according to the input requirement of a user, when the table lookup value is smaller than 0 (in a recovery mode), the vehicle outputs the required torque of the pedal of the driver, the recovery coefficient is multiplied into the torque chain to obtain the recovery torque, and the motor of the electric automobile is controlled to adopt the recovery torque to recover the sliding energy.
On the basis of the prior art, the invention can lead users to fine-tune the recovery strength of the electric automobile, has wider drivability coverage, and leads each user to customize the recovery strength of the automobile. According to the invention, on the premise of not increasing the existing PeDalMap, the energy recovery coefficient is increased, so that the existing recovery strength is increased or reduced, and the energy recovery strength of the electric automobile achieves the effect of stepless speed change.
Fig. 3 is a schematic diagram of a hardware structure of an electric vehicle energy recovery electronic device according to the present invention, where the electronic device includes:
at least one processor 301; the method comprises the steps of,
a memory 302 communicatively coupled to at least one of the processors 301; wherein,
the memory 302 stores instructions executable by at least one of the processors 301, the instructions being executable by at least one of the processors 301 to enable the at least one of the processors 301 to perform:
acquiring pedal information of the electric automobile;
acquiring a pedal output torque relationship;
obtaining a pedal demand torque of a driver according to the pedal information and the pedal output torque relation;
determining a recovery torque according to the driver pedal demand torque and a current recovery coefficient set by a user;
and controlling a motor of the electric automobile to recover the sliding energy by adopting the recovery torque.
Specifically, the electronic device may be an electronic control unit (Electronic Control Unit, ECU) of an electric vehicle. One processor 301 is illustrated in fig. 3.
The electronic device may further include: an input device 303 and a display device 304.
The processor 301, memory 302, input device 303, and display device 304 may be connected by a bus or other means, for example.
The memory 302 is used as a non-volatile computer readable storage medium, and may be used to store a non-volatile software program, a non-volatile computer executable program, and modules, such as program instructions/modules corresponding to the electric vehicle energy recovery method in the embodiment of the present application, for example, a method flow shown in fig. 1. The processor 301 executes various functional applications and data processing by running nonvolatile software programs, instructions and modules stored in the memory 302, that is, implements the electric vehicle energy recovery method in the above-described embodiment.
Memory 302 may include a storage program area that may store an operating system, at least one application program required for functionality, and a storage data area; the storage data area may store data created according to the use of the electric vehicle energy recovery method, and the like. In addition, memory 302 may include high-speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid-state storage device. In some embodiments, memory 302 may optionally include memory located remotely from processor 301, which may be connected to a device performing the electric vehicle energy recovery method via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The input device 303 may receive input user clicks and generate signal inputs related to user settings and function controls of the electric vehicle energy recovery method. The display 304 may include a display device such as a display screen.
The electric vehicle energy recovery method of any of the method embodiments described above is performed when executed by the one or more processors 301, with the one or more modules stored in the memory 302.
According to the invention, the recovery coefficient set by the user is introduced into the torque chain for calculating the recovery torque, so that the user can set the recovery coefficient by himself, the final recovery torque is adjusted, the recovery strength of the electric automobile can be finely adjusted by the user, the drivability coverage is wider, and each user can customize the recovery strength of the automobile. On the basis of not increasing the Pedal Map, the recovery strength is increased or reduced by increasing the recovery coefficient, so that the energy recovery strength of the electric automobile achieves the stepless speed change effect.
The foregoing examples illustrate only a few embodiments of the invention and are described in detail herein without thereby limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (8)
1. An electric vehicle energy recovery method, characterized by comprising:
acquiring pedal information of the electric automobile;
acquiring a pedal output torque relationship;
obtaining a pedal demand torque of a driver according to the pedal information and the pedal output torque relation;
determining a recovery torque according to the driver pedal demand torque and a current recovery coefficient set by a user;
controlling a motor of the electric automobile to recover the sliding energy by adopting the recovery torque;
further comprises:
obtaining the maximum hardware recovery torque of the electric automobile and the maximum relation recovery torque of the pedal output torque relation;
calculating a maximum recovery coefficient according to the maximum hardware recovery torque of the electric automobile and the maximum relation recovery torque of the pedal output torque relation;
establishing a corresponding relation between the required recovery intensity coefficient and the recovery coefficient according to the maximum allowable value of the required recovery intensity coefficient corresponding to the maximum recovery coefficient;
responding to a recovery coefficient adjustment request, and acquiring a demand recovery intensity coefficient input by a user;
according to the corresponding relation between the required recovery intensity coefficient and the recovery coefficient, determining the recovery coefficient corresponding to the required recovery intensity coefficient input by the user as the current recovery coefficient;
and saving the current recovery coefficient.
2. The method for recovering energy of an electric vehicle according to claim 1, comprising a plurality of corresponding relations between a required recovery intensity coefficient and a recovery coefficient corresponding to a recovery mode, wherein the determining, according to the corresponding relation between the required recovery intensity coefficient and the recovery coefficient, the recovery coefficient corresponding to the required recovery intensity coefficient input by the user as the current recovery coefficient specifically comprises:
acquiring a current recovery mode of the electric automobile;
and determining the recovery coefficient corresponding to the demand recovery intensity coefficient input by the user as the current recovery coefficient according to the corresponding relation between the demand recovery intensity coefficient corresponding to the current recovery mode and the recovery coefficient.
3. The electric vehicle energy recovery method according to claim 2, characterized by comprising a plurality of pedal output torque relationships corresponding to recovery modes:
the obtaining the maximum hardware recovery torque of the electric automobile and the maximum relation recovery torque of the pedal output torque relation specifically includes: obtaining the maximum recovery torque of the electric automobile in each recovery mode and the maximum relation recovery torque of the pedal output torque relation corresponding to each recovery mode;
the calculating the maximum recovery coefficient according to the maximum hardware recovery torque of the electric automobile and the maximum relation recovery torque of the pedal output torque relation specifically comprises: for each recovery mode, calculating a maximum recovery coefficient corresponding to the recovery mode according to the maximum hardware recovery torque of the electric automobile in the recovery mode and the maximum relation recovery torque of the pedal output torque relation corresponding to the recovery mode;
the method for establishing the corresponding relation between the required recovery intensity coefficient and the recovery coefficient by using the maximum allowable value of the required recovery intensity coefficient corresponding to the maximum recovery coefficient specifically comprises the following steps: for each recovery mode, establishing a corresponding relation between the required recovery intensity coefficient and the recovery coefficient corresponding to the recovery mode according to the maximum allowable value of the required recovery intensity coefficient corresponding to the recovery mode.
4. The method for recovering energy of an electric vehicle according to claim 1, wherein the establishing a correspondence between the required recovery intensity coefficient and the recovery coefficient by using the maximum recovery coefficient to correspond to the maximum allowable value of the required recovery intensity coefficient specifically comprises:
acquiring a preset minimum recovery coefficient;
and establishing a corresponding relation between the required recovery intensity coefficient and the recovery coefficient by using the maximum recovery coefficient to correspond to the maximum allowable value of the required recovery intensity coefficient and using the minimum recovery coefficient to correspond to the minimum allowable value of the required recovery intensity coefficient.
5. The electric vehicle energy recovery method of claim 4, wherein the recovery torque is a product of the driver pedal demand torque and the current recovery factor, the minimum recovery factor is greater than 0, and the minimum allowable value of the demand recovery intensity factor is 0.
6. The method for recovering energy of an electric vehicle according to claim 1, wherein the obtaining the required recovery intensity coefficient input by the user in response to the recovery coefficient adjustment request specifically includes:
responding to a recovery coefficient adjustment request, and displaying a required recovery intensity coefficient input interface;
and if the demand recovery intensity coefficient input by the user in the input interface is unchanged in the preset time, storing the demand recovery intensity coefficient input by the user.
7. The electric vehicle energy recovery method according to any one of claims 1 to 6, characterized in that the determining the recovery torque according to the driver pedal demand torque and a current recovery coefficient set by a user, specifically includes:
detecting whether a recovery adjustment function is started, if the recovery adjustment function is started, determining recovery torque according to the driver pedal demand torque and a current recovery coefficient set by a user, otherwise, taking the driver pedal demand torque as the recovery torque.
8. An electric vehicle energy recovery electronic device, the electronic device comprising:
at least one processor; the method comprises the steps of,
a memory communicatively coupled to at least one of the processors; wherein,
the memory stores instructions executable by at least one of the processors to enable the at least one of the processors to perform the electric vehicle energy recovery method of any one of claims 1 to 7.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106585389A (en) * | 2015-10-20 | 2017-04-26 | 北汽福田汽车股份有限公司 | Electric vehicle, electric vehicle regenerative braking control method and device |
| CN107487224A (en) * | 2016-07-20 | 2017-12-19 | 宝沃汽车（中国）有限公司 | A kind of control method of finished and system |
| CN108058615A (en) * | 2016-11-09 | 2018-05-22 | 华为技术有限公司 | The recovery method and device of vehicle braking energy |
| CN110281776A (en) * | 2019-07-09 | 2019-09-27 | 奇瑞新能源汽车股份有限公司 | Electric automobile energy recovery method and device |
| CN111038270A (en) * | 2019-12-30 | 2020-04-21 | 华人运通(江苏)技术有限公司 | Energy feedback control method and device for vehicle, vehicle and storage medium |
-
2020
- 2020-09-10 CN CN202010944718.1A patent/CN114161938B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106585389A (en) * | 2015-10-20 | 2017-04-26 | 北汽福田汽车股份有限公司 | Electric vehicle, electric vehicle regenerative braking control method and device |
| CN107487224A (en) * | 2016-07-20 | 2017-12-19 | 宝沃汽车（中国）有限公司 | A kind of control method of finished and system |
| CN108058615A (en) * | 2016-11-09 | 2018-05-22 | 华为技术有限公司 | The recovery method and device of vehicle braking energy |
| CN110281776A (en) * | 2019-07-09 | 2019-09-27 | 奇瑞新能源汽车股份有限公司 | Electric automobile energy recovery method and device |
| CN111038270A (en) * | 2019-12-30 | 2020-04-21 | 华人运通(江苏)技术有限公司 | Energy feedback control method and device for vehicle, vehicle and storage medium |
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