Torque control method for eliminating jitter caused in gaps of car transmission system

Abstract

The invention relates to a torque control method for eliminating jitter caused in gaps of a car transmission system. The torque control method comprises the following steps: A, filtering a torque requested by a driver by a first filter coefficient; B, judging whether the torque requested by the driver and the filtered torque requested by the driver are reverse in direction or not; if reverse, determining that a first boundary value and a second boundary value of a torque region that causes the jitter, otherwise, continuously performing the judgment; C, judging whether the filtered torque requested by the driver is within a range between the first boundary value and the second boundary value, if the filtered torque requested by the driver is within the range, filtering the filtered torque requested by the driver by a second filter coefficient, otherwise, filtering the filtered torque requested by the driver by the first filter coefficient, and continuously performing the judgment in the step B. The torque control method has the advantages that when the transmission torque direction is changed, a problem that the whole car is caused to be jittered due to impact easily caused in a novel engaged tooth surface contact process can be effectively solved.

Description

technical field [0001] The invention belongs to the field of automobiles, and relates to a torque control method for eliminating vibration caused by gaps in automobile transmission systems. Background technique [0002] Hybrid electric vehicles and pure electric vehicles have become the development trend of today's automobile industry. In a hybrid vehicle, the engine and the hybrid electric motor are the two power sources, and the hybrid controller (HCU) is the core of the vehicle control, mainly responsible for coordinating between the engine management system (EMS) and the motor controller (MCU) control, and responsible for the high and low voltage management of the entire system and fault diagnosis of the power system. [0003] In hybrid vehicles, the torque direction of the power source is often changed, such as braking force recovery, which is to use the reverse torque of the motor to generate electrical energy. When the torque direction changes, the gear meshing dire...

AI Technical Summary

Problems solved by technology

If the torque changes greatly, it will cause the tooth surface to hit the other side violently, resulting in a huge impact, causing the entire transmission system to vibrate violently

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