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A solution to starting shaking and electrical brake noise of a battery electric vehicle

A technology of pure electric vehicles and solutions, which is applied in the field of pure electric vehicle starting jitter and electric brake noise, can solve problems such as the inability to reduce jitter frequency and sacrifice of vehicle dynamic performance, and achieve suppression of starting jitter, afterburning process and The withdrawal process is smooth and smooth, reducing the effect of mechanical shock

Active Publication Date: 2016-07-27
SHANGHAI DAJUN TECH
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Problems solved by technology

This method of limiting the throttle is also a simple way to passivate the throttle, which can weaken the vibration amplitude, but cannot reduce the vibration frequency, and also sacrifices the vehicle's dynamic performance.

Method used

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  • A solution to starting shaking and electrical brake noise of a battery electric vehicle

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Embodiment Construction

[0017] The solution of pure electric vehicle starting jitter and electric brake noise of the present invention comprises the following steps:

[0018] Step 1. Define the given accelerator torque as the set value of the motor torque after the analysis of the accelerator pedal opening, the motor feedback torque is the torque value that the motor has actually reached during the execution of torque control, and the step size of the rising torque is the absolute value of the motor feedback torque In the process of increasing the value, the maximum torque value of a single adjustment, the step size of the descending torque is the maximum torque value of a single adjustment in the process of decreasing the absolute value of the motor feedback torque, and the step size of the steady-state torque is in the state of static or motor torque balance Next, the maximum torque value of a single adjustment;

[0019] Step 2, mark the motor torque adjustment state as the ascending torque step ad...

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Abstract

The invention provides a solution to starting shaking and electrical brake noise of a battery electric vehicle. The solution comprises the steps of defining an accelerator preset moment, a motor feedback moment, a rising moment step size, a declining moment step size and a steady state moment step size; marking motor moment adjusting states as a rising moment step size adjusting state, a declining moment step size adjusting state and a balance moment step size adjusting state and corresponding vehicle operation states; separately setting moment step size adjusting strategies under different moment step size adjusting states to realize the gradual adjustment of the motor moment under the different states. The solution enables a force adding process and a force removing process of a motor to be stable and smooth and can reduce the mechanical impact of the motor, effectively restrain the starting shaking of a vehicle and eliminate or reduce electrical brake noise in an electrical feedback process.

Description

technical field [0001] The invention relates to a method for solving the starting vibration and electric braking noise of a pure electric vehicle. Background technique [0002] Pure electric vehicles are driven by motors. Compared with the mass of the vehicle, the rotor inertia of the motor is small, but the electromagnetic torque responds quickly. When the two cooperate, especially in the starting stage, reversing and low-speed recovery of electric energy, there will be a period of time. The phenomenon of tooth beating will cause the whole vehicle to vibrate and mechanical abnormal noise. Most of the existing methods for suppressing jitter and noise passivate the throttle opening and rate of change. [0003] Patent document CN103552469A discloses a throttle passivation method that considers the driver's intention, which includes rational identification of the rate of change of the throttle opening, rejects the change of the throttle opening caused by road bumps, and then e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L15/20B60R16/02
CPCY02T10/72
Inventor 王文峰雷小军徐性怡
Owner SHANGHAI DAJUN TECH
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