Double power source drive vehicle torque distribution method

Abstract

The invention discloses a double power source drive vehicle torque distribution method. An output torque of front and rear power sources can be adjusted in real time according to the steering characteristics of a vehicle, under the condition of not changing an original power system structure and not increasing the cost, by optimizing inter-axle drive torque distribution coefficients, the steeringcharacteristics of the vehicle are improved, and the operating stability of the vehicle is improved; under the condition of without increasing extra sensors, maximal accelerated speed information of the vehicle is automatically learned, and thus, a road adhesion coefficient is obtained; and the accelerating in/out bending working condition of a driver further can be automatically identified, by adjusting the output torque of the drive sources of the front and rear axles, the in/out bending characteristics of the vehicle is improved, and in/out bending of the driver is assisted.

Description

technical field [0001] The invention relates to the technical field of automobile electronic control, in particular to a torque distribution method for a vehicle driven by dual power sources. Background technique [0002] Against the backdrop of increasingly severe global energy and environmental issues, dual power source driven vehicles are developing faster and faster. Compared with traditional cars, in the current mass-produced dual power source drive vehicles, most of the inter-axle torque distribution of the vehicle only considers the longitudinal characteristics of the vehicle, that is, the inter-axle torque is distributed based on the vehicle efficiency and driving performance, without considering the vehicle axle. The effect of the torque distribution between the two on the lateral stability. Patent 1 (CN107097686A) and Patent 2 (CN106379197A) are mainly based on motor efficiency and longitudinal drive performance to allocate the required torque of the front and rea...

AI Technical Summary

Problems solved by technology

However, Patent 1 and Patent 2 only considered the torque distribution caused by the longitudinal movement of the vehicle, and did not consider the influence of the lateral movement of the vehicle on torque distribution.

Most existing patents on vehicle lateral dynamics such as patent 3 (CN104773169A) and patent 4 (CN105172790A) mainly realize direct yaw moment control by controlling the braking force on the four wheels. There are few patents on torque distribution between front and rear dual power source vehicles to improve vehicle stability

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