Motor-driven hydraulic power assisted steering pump

Abstract

A motor-driven hydraulic power assisted steering pump comprises an electrical interface, a temperature sensor, an electronic control unit connected with the electrical interface and the temperature sensor, a driving circuit connected with the electronic control unit, a motor connected with the driving circuit and a gear pump connected with the motor. The electrical interface comprises a power source interface, an ignition signal input interface, a CAN (controller area network) bus interface and a steering angle speed signal input interface, the ignition signal input interface inputs ignition signals to the electronic control unit to control starting of the electronic control unit, the CAN bus interface provides traveling speed of an automobile, rotating speed of an engine and loading and updating information sent by an upper computer with loading software, and the steering angle speed signal input interface provides steering angle speed signals of the automobile in real time. The motor-driven hydraulic power assisted steering pump has the advantages that oil consumption is lowered, temperature compensation is realized, various modes can be configured to operate, and real-time fault detection and processing can be realized when the automobile travels.

Description

technical field [0001] The invention relates to a hydraulic power steering pump, in particular to a motor driven hydraulic power steering pump. Used in cars. Background technique [0002] In the prior art, the mechanical power steering pump is powered by the engine. When the mechanical power steering pump increases with the engine speed, the power assist also increases correspondingly, resulting in heavy hand feeling at low speed and fluttering hand feeling at high speed when the car is running, poor safety and high fuel consumption. Since electric vehicles do not have an engine, the mechanical power steering pump cannot meet the requirements; the motor-driven power steering pump does not have a CAN bus. At present, cars basically have CAN bus, so the motor-driven power steering pump is difficult to match, resulting in failure information cannot be output, the driver cannot be reminded in time, and it is not conducive to online product testing. Moreover, there are too many...

AI Technical Summary

Problems solved by technology

If the motor used is a brushed motor, it is not conducive to maintenance and has a limited life; the pure electric power steering device cannot be used for heavier vehicles due to its low power, and there are problems such as no power output in the dead zone of steering torque and poor hand feeling.

[0003] In short, the mechanical power steering pump described has poor safety and high fuel consumption, and cannot be applied to electric vehicles; the motor-driven steering pump without CAN bus has difficulty in alerting and detecting; the pure electric power steering device has low power , poor hand feeling and other problems

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