Motor torque filtering control method and system and hybrid vehicle

Abstract

The invention provides a motor torque filtering control method and system and a hybrid vehicle. The motor torque filtering control method comprises the steps of obtaining a vehicle speed in a current filtering period and a motor request torque distributed before filtering, and obtaining a motor output torque after filtering in a previous filtering period; determining a maximum filtering rate Vmax and a minimum filtering rate Vmin according to the motor output torque and the vehicle speed; an interpolation coefficient R is determined according to the motor request torque and the vehicle speed or according to the motor request torque, the vehicle speed, the maximum filtering rate and the minimum filtering rate, and R is larger than or equal to 0 and smaller than or equal to 1; calculating a first filtering gradient M1 according to a formula M1 = R * Vmax + (1-R) * Vmin; and filtering the motor request torque of the motor according to the first filtering gradient M1. According to the scheme, it can be guaranteed that the vehicle runs smoothly without impact, and the riding comfort of a passenger is improved.

Description

technical field [0001] The invention relates to the technical field of torque filtering of hybrid vehicles, in particular to a motor torque filtering control method and system and a hybrid vehicle. Background technique [0002] Due to the complex battery technology and high cost of pure electric vehicle technology systems, and with the development of electrification systems and increasingly stringent national regulations on fuel consumption and emission requirements, hybrid vehicles have been greatly promoted. [0003] The hybrid system includes a single-motor hybrid system and a dual-motor hybrid system. The dual-motor hybrid system has a pure electric drive mode, a series drive mode and a parallel drive mode. figure 1 shows a schematic structural diagram of an existing two-motor hybrid system, as figure 1 As shown, the power system is composed of an engine, a motor P1, a motor P2, a clutch, and a transmission system. In the series drive mode, the clutch C0 is not engaged...

AI Technical Summary

Problems solved by technology

If the distributed motor torque is not filtered or the filtering effect is not good, it is very likely that the torque will change drastically, which will cause the vehicle to move

[0005] For the filter processing of the motor torque, the target of the filter processing will be slightly different for different vehicle operating conditions. For example, when the motor torque drives the wheels, especially when the motor torque crosses zero, the filter processing is not performed or the filtering effect is not good. It will bring shock and poor driving experience

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