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Electric vehicle energy recovery method

A technology of energy recovery and electric vehicles, which is applied in the direction of electric vehicles, electric braking systems, vehicle components, etc., can solve the problems of lifting, reducing the energy consumption rate of the whole vehicle, and unfavorable cruising range of the whole vehicle, so as to improve energy recovery The effect of torque, increased braking, and improved energy recovery

Inactive Publication Date: 2019-03-19
CHERY AUTOMOBILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Both of the above two situations have a certain degree of energy loss, which is not conducive to the reduction of the energy consumption rate of the vehicle, that is, it is not conducive to the improvement of the cruising range of the vehicle

Method used

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  • Electric vehicle energy recovery method

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Embodiment Construction

[0021] The specific implementation manner of the present invention will be described in further detail below by describing the best embodiment with reference to the accompanying drawings.

[0022] In the prior art, the braking capacity recovery includes the first stage and the second stage, by designing an idle stroke on the brake pedal (the idle stroke means that the hydraulic brake does not operate within a certain stroke, but increases the energy recovery torque according to the calibration) On the basis of increasing braking by means of the brake pedal), the energy recovery intensity of the second stage is calibrated according to the different openings of the brake pedal (that is, the energy recovery torque of the second stage is calibrated), and the energy recovery intensity of the first stage is calibrated at the same time, which can improve the braking performance to a certain extent. It is of great significance to promote the promotion and development of pure electric v...

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Abstract

The invention discloses an electric vehicle energy recovery method comprising the following steps: the step S1 of controlling a vehicle to uniformly decelerate at constant deceleration according to the pre-calibrated energy recovery torque in the first stage of vehicle energy recovery; the step S2 of stepping on a brake pedal to trigger the second stage of the energy recovery under the condition that the conditions of the first stage of the vehicle energy recovery are met; the step S3 of presetting the brake pedal stroke threshold in the second stage of energy recovery; when the brake pedal stroke is greater than the stroke threshold, the mechanical brake is applied; when the brake pedal stroke is less than the stroke threshold, the energy recovery torque is adjusted according to the stroke of the brake pedal. The method has the advantage that the pedal stroke is set to the idle stroke in the second stage of the energy recovery, where the mechanical brake is not applied, and the energyrecovery distortion is adjusted according to the actual pedal opening degree to improve the energy recovery torque, increase the brake and maximize the energy recovery while the brake demand is met.

Description

technical field [0001] The invention relates to the field of vehicle energy recovery, in particular to an electric vehicle energy taxation method Background technique [0002] In recent years, with the support of national and local policies, pure electric vehicles have achieved relatively rapid development. The battery system, motor system and vehicle control of pure electric vehicles have made significant progress! [0003] In the automotive industry, the technological progress and development of pure electric vehicles has solved some environmental and energy problems, but there are still certain technical defects. Restricted by the development of batteries, motors and control technologies, the energy consumption rate of pure electric vehicles has been at a relatively high level. In this case, with a certain battery power, increasing the mileage of pure electric vehicles as much as possible under certain conditions, and reducing the energy consumption rate of the whole veh...

Claims

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Application Information

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IPC IPC(8): B60L7/10
CPCB60L7/10
Inventor 王金桥王新树陶颖汪跃中张飞付超高洁朱亮
Owner CHERY AUTOMOBILE CO LTD
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