A torque adjustment method for an electric vehicle adaptive cruise system

Abstract

The invention provides a torque adjustment method of an adaptive cruise system of an electric vehicle, which relates to the field of automobiles. Including steps: use the adaptive cruise controller to calculate the expected acceleration, use the tire pressure sensor to detect the tire pressure p of the car tir The inclination sensor detects the vehicle mass M detected by the road gradient pressure sensor; the vehicle speed sensor detects the actual vehicle speed v(n); the acceleration sensor detects the actual acceleration of the vehicle and the human-computer interaction system inputs the driving environment information. The rolling resistance coefficient is obtained from the function of the relationship between the rolling resistance coefficient and the road surface and tire pressure. Realization of reference torque T by dynamic model fid (n) feedforward adjustment, plus adaptive PID feedback correction to get the desired torque T des (n). Switching the hold area enables effective switching between drive control and brake control, and ultimately adaptive cruise control. The invention shortens the adjustment time for stabilization to the final target acceleration and improves the stability of the system.

Description

technical field [0001] The patent belongs to the technical field of automobiles, and specifically relates to a torque adjustment method of an adaptive cruise system of an electric vehicle. Background technique [0002] In order to achieve green travel and renewable energy utilization, new energy vehicles have emerged all over the world and are favored by people. The birth and development of Internet+ and artificial intelligence technologies have made humans pursue a more efficient, convenient and comfortable life. These technologies come together to form an electric vehicle with intelligent assisted driving functions, which further evolves into a smart electric vehicle. The adaptive cruise control system is a sub-function of the intelligent assisted driving system. During the driving process of the vehicle, by detecting the current traffic environment state and the vehicle running state, it cooperates to control the drive motor and the braking system to make the vehicle dri...

AI Technical Summary

Problems solved by technology

Although the entire patent describes that the engine, electric motor and mechanical brake system respond individually or jointly to the torque request, it does not introduce the specific adjustment method of the cruise torque in detail.

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