Integrated electro-hydraulic steering actuating unit and control method thereof

Abstract

Disclosed are an integrated electro-hydraulic steering actuating unit and a control method thereof, wherein an externally inputted control signal controls a rotation direction and a rotational speed of a bi-directional servo motor, and the bi-directional servo motor drives a protruding direction and a protruding speed of an actuating cylinder. The control valve block assembly is used for maintaining the movement position of the oil cylinder when the two-way servo motor is stopped, and can be used for dissipating heat from the oil returning side oil to the closed oil tank when the oil cylinderis extended, so as to reduce the temperature of the oil. The control valve block assembly is capable of limiting the working pressure of the actuating cylinder when the temperature or load of the actuating cylinder changes suddenly, and is used for setting the maximum working pressure of the bidirectional gear pump, limiting the output power of the bidirectional gear pump, and preventing the bidirectional servo motor from being overloaded. The control valve block assembly can realize the communication between the two chambers of the actuating cylinder to be in the floating working state, whichimproves the safety of the integrated electro-hydraulic steering actuating unit under the emergency working condition.

Description

technical field [0001] The invention relates to an integrated electro-hydraulic steering actuation unit and a control method, belonging to the technical field of hydraulic transmission and control. Background technique [0002] At present, the new generation of intelligent special vehicles adopts all-electric drive, the steering system has full steering function, and can realize multiple steering modes and fault monitoring functions to meet the steering requirements under various complex working conditions. The system structure is huge and complex, and the steering mode is single. It cannot realize the switching of multi-steering modes according to the application requirements, and cannot adopt the electric drive mode. It can no longer meet the steering requirements of the new generation of intelligent special vehicles. Contents of the invention [0003] The technical problem solved by the present invention is: to overcome the deficiencies of the prior art, to provide an i...

AI Technical Summary

Problems solved by technology

[0002] At present, the new generation of intelligent special vehicles adopts all-electric drive, the steering system has full steering function, and can realize multiple steering modes and fault monitoring functions to meet the steering requirements under various complex working conditions. The system structure is huge and complex, and the steering mode is single. It cannot realize the switching of multiple steering modes according to the application requirements, and the electric drive mode cannot be used. It can no longer meet the steering requirements of the new generation of intelligent special vehicles.

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