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Electric vehicle and parking control method and automatic transmission of electric vehicle

An electric vehicle and control method technology, applied in transmission control, components with teeth, belts/chains/gears, etc., can solve problems such as transmission shock, large jitter, and large user jitter, and achieve the effect of reducing comfort

Active Publication Date: 2017-03-01
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, when the entire vehicle is parked on a slope in P gear through the above-mentioned shift-by-wire control system, the weight of the entire vehicle is loaded on the transmission in the form of load, which will have a greater impact on the transmission and make the user feel greater. jitter
In addition, when the user releases the P gear to drive, when the locking mechanism is unlocked from the transmission ratchet, the user will feel a large vibration of the whole vehicle, accompanied by a large unlocking noise, which will have a severe impact on the transmission, seriously Affect the comfort of the vehicle and the life of the transmission

Method used

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  • Electric vehicle and parking control method and automatic transmission of electric vehicle
  • Electric vehicle and parking control method and automatic transmission of electric vehicle
  • Electric vehicle and parking control method and automatic transmission of electric vehicle

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Embodiment Construction

[0024] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0025] A parking control method for an electric vehicle, an automatic transmission for an electric vehicle, and an electric vehicle according to embodiments of the present invention will be described below with reference to the accompanying drawings.

[0026] figure 1 is a flowchart of a parking control method for an electric vehicle according to an embodiment of the present invention. Such as figure 1 As shown, the parking control method of the electric vehicle includes the following steps:

[0027] S1. When a gear position s...

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Abstract

The invention discloses a parking control method of an electric vehicle. The parking control method comprises the following steps that S1, when a gear signal is detected, whether the current gear of the electric vehicle is a gear P is judged according to the gear signal; S2, if yes, the vehicle speed of the electric vehicle and the gradient of a current road of the electric vehicle are detected; S3, when the vehicle speed of the electric vehicle is lower than or equal to the preset vehicle speed and the gradient of the current road of the electric vehicle is larger than or equal to the first preset value, an EPB system of the electric vehicle is controlled to execute a locking order; and S4, after locking is completed through the EPB system, if the vehicle speed of the electric vehicle is lower than or equal to the preset vehicle speed, the gear P is controlled to be in a locking state. Through the control method, abnormal sound and shaking of the whole vehicle which are produced during unlocking can be effectively reduced, and the requirement for comfort of the whole vehicle is met. The invention further discloses an automatic transmission of the electric vehicle and the electric vehicle.

Description

technical field [0001] The invention relates to the technical field of electric vehicles, in particular to a parking control method of the electric vehicle, an automatic transmission of the electric vehicle and an electric vehicle. Background technique [0002] In the related art, the shift-by-wire control system is used to realize the locking and unlocking of the electric vehicle, that is, when the electric vehicle is locked, the output shaft of the automatic transmission device is brought to the locked state through the parking locking device, and the electric vehicle is locked. When the vehicle is unlocked, the output shaft is brought to the lock release state by the parking lock device. [0003] However, when the entire vehicle is parked on a slope in P gear through the above-mentioned shift-by-wire control system, the weight of the entire vehicle is loaded on the transmission in the form of load, which will have a greater impact on the transmission and make the user fee...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H63/34F16H63/40
CPCF16H63/34F16H63/40F16H2312/12
Inventor 廉玉波凌和平陈昊
Owner BYD CO LTD
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