A control method, device, system and storage medium for vehicle output torque

Abstract

The invention discloses a method for controlling the output torque of a vehicle. The control method includes: obtaining the actual power torque of the vehicle power device; obtaining the actual acceleration of the power wheel of the vehicle; according to the actual power torque and the power wheel The actual acceleration of the vehicle establishes the power transfer function of the vehicle; the current resonance frequency of the vehicle is determined according to the power transfer function; the torque gradient of the vehicle is determined according to the current resonance frequency, and the torque gradient is the torque per unit time and controlling the operation of the power plant of the vehicle according to the torque gradient of the vehicle. The invention also discloses a vehicle output torque control device, system and storage medium. The present invention can determine the torque gradient according to the current resonance frequency of the vehicle, and control the operation of the power plant of the vehicle according to the torque gradient, so as to speed up reaching the target torque, avoid slow acceleration, and improve driving performance.

Description

technical field [0001] The present invention relates to vehicle driving technology, in particular to a control method, device, system and storage medium for vehicle output torque. Background technique [0002] A vehicle can be viewed as a spring-mass system that resonates at a certain frequency. If a high-frequency input is given, the vehicle will move back and forth. Such as Figure 9 As shown in , it describes the situation that when the driver suddenly steps on the accelerator, the vehicle shock and the forward and backward movement may occur. The variation range of the torque input can be controlled by adding a filter. Specifically, such as Image 6 As shown, the filter has 3 gradients. The purpose of the first gradient is to bring the negative torque to 0NM quickly. The second torque gradient is very gentle, the main purpose is to make the torque smoothly pass through 0 torque, so as to avoid the tooth surface of the driving gear from impacting the tooth surface of...

AI Technical Summary

Problems solved by technology

If these three gradients are all determined by calibration, because the worst hardware state must be considered, a relatively slow gradient will be used, which will cause the problem of slow acceleration.

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