Vehicle output torque control method, device and system, and storage medium

Abstract

The invention discloses a vehicle output torque control method. The control method comprises the following steps: obtaining the actual power torque of a vehicle power device; obtaining the actual acceleration of a power wheel of the vehicle; establishing a power transfer function of the vehicle according to the actual power torque and the actual acceleration of the power wheel; determining the current resonant frequency of the vehicle according to the power transfer function; determining the torque gradient of the vehicle according to the current resonant frequency, wherein the torque gradientis the variable quantity of torque in unit time; and controlling the vehicle power device to operate according to the torque gradient of the vehicle. The invention further discloses a vehicle outputtorque control device and system, and a storage medium. The torque gradient can be determined according to the current resonant frequency of the vehicle, and the power device of the vehicle is controlled to operate according to the torque gradient, so that the target torque is accelerated, slow acceleration is avoided, and the drivability is improved.

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 Figure 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 o...

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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