Wire-controlled electric power steering system of commercial vehicle

Abstract

The invention discloses a wire-controlled electric power steering system of a commercial vehicle. The steering system comprises a control area network bus, an electronic control unit, a torque sensor,a vehicle speed sensor, a motor sensor, a current magnitude sensor and a current direction sensor; a signal output end of the control area network bus is in control connection with a signal receivingend of the electronic control unit, signal output ends of the torque sensor and the vehicle speed sensor are in feedback connection with a signal receiving end of the electronic control unit, a signal output end of the electronic control unit is in control connection with a signal input end of the motor sensor, a signal output end of the motor sensor is in control connection with signal receivingends of the current magnitude sensor and the current direction sensor separately, and signal output ends of the current magnitude sensor and the current direction sensor are in feedback connection with a signal receiving end of the electronic control unit; three steering modes of intelligent driving, electric power steering and driver manual steering can be achieved.

Description

technical field [0001] The invention relates to a recirculating ball type electric power steering system by wire for commercial vehicles, in particular to a recirculating ball type electric power steering system for commercial vehicles that can be used for intelligent driving. Background technique [0002] The steering system is a series of devices used to change or maintain the direction of driving or reversing the car. The steering system of the car is very important to the driving safety of the car. Therefore, the parts of the steering system of the car are called security parts. Both the steering system and the braking system of the car are Two systems that must be paid attention to in car safety, the function of the car steering system is to control the driving direction of the car according to the driver's wishes; [0003] There are many kinds of steering systems on the market, but there are many disadvantages: [0004] The mechanical steering system uses the driver's...

AI Technical Summary

Problems solved by technology

However, the steering assist is still provided by the hydraulic system, so the hydraulic power steering system cannot overcome the problem of oil leakage; the addition of an electronic system increases the cost of the electro-hydraulic power steering system, complicates the structure, and reduces the reliability and stability of the operation;

[0007] The four-wheel steering system means that the front, rear, left, and right wheels are all steered wheels, and the technology required for control is difficult, complex in structure, and high in cost;

[0008] Electric Power Steering System (EPS), Electric Power Steering System (EPS) refers to the steering system in which the hand force input by the driver and the steering power provided by the DC motor work together to overcome the steering resistance when the car is turning; but It cannot be operated by wire, and cannot be applied to intelligent driving;

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