Vehicle chassis integration control method and system

Abstract

The invention provides a vehicle chassis integration control method and system. The control method comprises the steps that a cooperative control unit receives a first engine torque output by an engine management system, a first engine torque limiting request output by a four-drive controller, a second engine torque limiting request output by a vehicle body stabilizing controlling system and a third engine torque limiting request output by a gearbox controlling unit from a CAN bus respectively; the cooperative control unit cooperatively controls the first engine torque limiting request, the second engine torque limiting request, the third engine torque limiting request, and the first engine torque, and outputs a second engine torque as an engine executing torque. The vehicle chassis integration control method and system have the advantages that through cooperative work of all the systems, various kinds of performance like the fuel economy, the dynamic performance and the handling stability of vehicles are effectively improved; according to features of the oil temperature, the disc temperature and the rotation speed difference, a multi-parameter, multilayer and multistage torque-limiting control strategy is implemented, so that it is guaranteed that the performance of the whole vehicle and the service life of parts are comprehensively optimal.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to an integrated control method and system for an automobile chassis. Background technique [0002] With the rapid development of advanced technologies such as modern control theory, multi-sensor information fusion, and large-scale integrated circuits, as well as the perfect pursuit of automobile products by human society, the chassis with the control goals of improving vehicle ride comfort, active safety and handling stability Integrated control has become a research hotspot in the field of vehicle engineering. Through the coordination of the control functions of the chassis-related subsystems, the functional potential of each control module can be fully tapped, the integrated global control of the chassis can be realized, and the comprehensive performance of the vehicle can be improved. However, in the process of vehicle development, most of the key electronic control systems...

AI Technical Summary

Problems solved by technology

However, in the process of vehicle development, most of the key electronic control systems are independently designed and developed by each component manufacturer, without considering the interaction and coupling with other electronic control systems. There is potential for mutual interference and influence

Existing chassis integrated control strategies are generally only aimed at conventional two-wheel drive vehicles or hybrid vehicles, and less consideration is given to controlling the coordination of various systems, especially the compatibility and matching of the torque manager control of the four-wheel drive system and the chassis electronic control system of other conventional systems become a difficulty, resulting in low power performance and fuel economy of the vehicle

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