CN-121989949-A - Battery electric vehicle
Abstract
The battery electric vehicle is provided with one or more processors that control the output of the motor and the gear of the transmission. When the battery electric vehicle is in the on-demand mode, the one or more processors acquire a maximum value of a target driving force that is a maximum target driving force that is available at a current vehicle speed of the battery electric vehicle and a maximum value of a driving force that is a maximum realization driving force that is a maximum value of a driving force that the battery electric vehicle can output at the current vehicle speed of the battery electric vehicle and a current gear of the transmission. Further, when the maximum target driving force is greater than the maximum realized driving force, the one or more processors cause a gear of the transmission to downshift to the specified gear at the specified time.
Inventors
- Fujii kazumoto
Assignees
- 丰田自动车株式会社
Dates
- Publication Date
- 20260508
- Application Date
- 20251104
- Priority Date
- 20241107
Claims (5)
- 1. A battery electric vehicle having an electric motor as a drive source, the battery electric vehicle comprising: a driving operation member for driving; A transmission that changes an output of the motor according to a gear and transmits the change to a drive wheel of the battery electric vehicle; 1 or more storage devices for managing a plurality of on-demand models obtained by modeling a plurality of virtual moving bodies having different driving environment characteristics for driving operations of a driver, and 1 Or more processors controlling the output of the motor and the gear of the transmission, When the battery electric vehicle is in the on-demand mode, the 1 or more processors are configured to: Acquiring an object on-demand model corresponding to an object virtual moving body selected from the plurality of virtual moving bodies from the 1 or more storage devices; Calculating a virtual acceleration of the object virtual moving body for a driving operation of the driver using the object on-demand model according to an operation state of the driving operation member and a running state of the battery electric vehicle; calculating a target driving force of the battery electric vehicle for setting an acceleration of the battery electric vehicle as the virtual acceleration; Controlling an output of the motor to impart the target driving force to the battery electric vehicle; acquiring a maximum target driving force which is the maximum value of the target driving force available at the current vehicle speed of the battery electric vehicle; obtaining maximum driving force which is the maximum value of the driving force which can be output by the battery electric vehicle under the current vehicle speed of the battery electric vehicle and the current gear of the transmission, and And when the maximum target driving force is larger than the maximum realized driving force, the gear of the transmission is shifted down to a specified gear at a specified time.
- 2. The battery electric vehicle according to claim 1, wherein, The specified gear is the gear at which the maximum realized driving force becomes the maximum target driving force or the gear ratio becomes the maximum.
- 3. The battery electric vehicle according to claim 1, wherein, When the target virtual moving body is a virtual moving body having a speed change function, the specified timing is a timing at which the target virtual moving body is shifted down.
- 4. The battery electric vehicle according to claim 1, wherein, The driving operation member includes a throttle operation device, The predetermined time is a specific operation time at which the operation state of the accelerator operation device is changed greatly.
- 5. The battery electric vehicle according to claim 1, wherein, When the battery electric vehicle is in the on-demand mode, the 1 or more processors are configured to further: When the gear of the transmission is the specified gear, Acquiring the current driving force of the battery electric vehicle; acquiring a virtual driving force of the object virtual moving body for a driving operation of the driver using the object on-demand model, and A difference obtained by subtracting the current driving force from the virtual driving force is added to the target driving force.
Description
Battery electric vehicle Technical Field The present invention relates to a battery electric vehicle having an electric motor as a drive source. And more particularly, to a battery electric vehicle provided with a transmission that changes an output of a motor according to a gear position and transmits the change to driving wheels. Background The motor can be controlled to output a desired motor torque by controlling the applied voltage or magnetic field. With this, a technique of reproducing various driving sensations in a battery electric vehicle by appropriately controlling the motor of the battery electric vehicle can be considered. As one of the elements that characterize the driving feeling, there is an acceleration feeling for the driving operation of the driver. Acceleration is a key point when the driver feels fun in driving. In particular, preference for acceleration feeling varies from driver to driver. In addition, the driver may want to enjoy acceleration feeling of various moving bodies according to moods. Accordingly, the inventors of the present invention use a plurality of models that model a plurality of virtual moving bodies. The inventors of the present invention studied an "on-demand mode" in which acceleration feeling of a plurality of virtual moving bodies is reproduced in a 1-cell electric vehicle. In the on-demand mode, control of the motor is performed to reproduce acceleration characteristics of a virtual moving body selected from a plurality of virtual moving bodies when driven in the battery electric vehicle. However, conventionally, a battery electric vehicle provided with a transmission has been considered. For example, japanese patent application laid-open No. 2019-178741 discloses a technique for improving drivability by shortening a shift time with respect to a battery electric vehicle provided with a transmission. By providing a transmission in a battery electric vehicle, the power performance of the battery electric vehicle can be improved. Further, as a document showing a technical level in the art, japanese patent application laid-open No. 2018-166386 is known. Disclosure of Invention Consider a case where a battery electric vehicle equipped with a transmission is driven in an on-demand mode. The battery electric vehicle in the on-demand mode is controlled to reproduce acceleration characteristics of the virtual moving body for a driving operation of the driver. On the other hand, the transmission is controlled in accordance with a predetermined shift schedule in the battery electric vehicle. In particular, in a battery electric vehicle and a virtual moving body, the structure of a power train is generally different. Therefore, a downshift of a gear that is not displayed during the operation of the virtual moving body occurs in response to the driving operation of the driver, and therefore, there is a problem that reproducibility of the acceleration characteristic of the virtual moving body is impaired. For example, when the battery electric vehicle is running stably at a medium to high speed, the driver rapidly accelerates the accelerator pedal to rapidly accelerate the battery electric vehicle. The present invention has been made in view of the above problems. An object of the present invention is to provide a technique capable of improving reproducibility of acceleration characteristics of a virtual moving body in a battery electric vehicle provided with a transmission. One aspect of the present invention relates to a battery electric vehicle (battery ELECTRIC VEHICLE) having an electric motor as a driving source. The battery electric vehicle is provided with a driving operation member for driving, a transmission, 1 or more storage devices, and 1 or more processors. The transmission changes the output of the motor according to the gear and transmits it to the drive wheels of the battery electric vehicle. The 1 or more storage devices manage a plurality of on-demand models obtained by modeling a plurality of virtual moving bodies having different driving environment characteristics for driving operations of a driver. The 1 or more processors control the output of the motor and the gears of the transmission. When the battery electric vehicle is in the on-demand mode, the 1 or more processors perform the following processing: acquiring an object on-demand model corresponding to an object virtual moving body selected from a plurality of virtual moving bodies from 1 or more storage devices; Calculating a virtual acceleration of the target virtual moving body for the driving operation of the driver using the on-demand model according to the operation state of the driving operation member and the running state of the battery electric vehicle; calculating a target driving force of the battery electric vehicle for setting the acceleration of the battery electric vehicle as a virtual acceleration, and The output of the motor is controlled to impart a target driving force to th