Controller of automotive electronic power steering (EPS) system

Abstract

The invention discloses a controller of an automotive electronic power steering (EPS) system, and belongs to the technical field of automotive parts. The controller is characterized in that: a power supply management module is connected with a microcontroller unit (MCU) module; a safety relay module is connected with the power supply management module; the safety relay module is connected with an H bridge driving module; the safety relay module is connected with an H bridge; the pulse width modulation (PWM) signal port of the MCU module is connected with the port of the H bridge driving module; the PWM signal port of the H bridge driving module is connected with the port of a field effect tube; the resistance port of the H bridge is connected with the port of a feedback current module; the output port of the feedback current module is connected with the active directory (AD) port of the MCU module; the output port of a torque sensor is connected with the AD port of the MCU module; and the output ports of a vehicle speed sensor and a revolving speed sensor are connected with the pulse signal port and the signal catching port of the MCU module. The controller has the advantages that: the operating performance is improved, the assisted power is changed together with vehicle speed, and the operating stability requirement of an automobile is met; and due to the EPS system, the requirements of the automobile for energy conservation and environment friendliness are met, and the power steering performance is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of auto parts. Background technique [0002] Automobile steering system is an important device to control the driving line and direction of the car according to the driver's steering will, which directly affects the handling and stability of the car. For the automobile steering system, in addition to its safe and reliable operation, light operation, good maneuverability, high efficiency and energy saving, it is also required to be able to operate under various working conditions (including straight-line driving, normal steering, fast steering, in-situ steering, etc.), According to different driving speeds and road conditions, it provides the best road feeling, so that the driver and the car form a perfect feedback system. [0003] Safety, energy saving and environmental protection have become the themes of the development of the automobile industry in the world today, so improving the efficiency and steerin...

AI Technical Summary

Problems solved by technology

At that time, in order to reduce the steering force, the radius of the steering wheel was generally relatively large, which not only occupied a certain amount of space in the car, but also made the steering operation very inconvenient. These characteristics can be seen on some early buses and trucks in my country.

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