The invention discloses a hydraulic power assisted steering system comprising the following structures: a steering oil can; a steering gear having a steering control valve, wherein an oil outlet of the steering control valve is connected with the steering oil can; a steering pump set comprising a first steering pump and a second steering pump, and an oil outlet of the second steering pump is connected with an oil inlet of the steering control valve; a reversing valve having an opening pressure value enabling the reversing valve to switch between a first position and a second position, and an opening control end of the reversing valve is connected with an oil path of the steering control valve. When the reversing valve is in the first position, an oil outlet of the first steering pump is connected with an oil inlet of the second steering pump through the reversing valve; when the reversing valve is in the second position, the oil inlet of the second steering pump is connected with the steering oil can through the reversing valve, and the oil outlet of the first steering pump is connected with the oil inlet of the steering control valve through the reversing valve. A hydraulic steering system of a heavy truck in the prior is heavy in steering under an engine low speed big bend or under low temperature starting conditions; the hydraulic power assisted steering system can solve the said problems, and allows the whole steering system to work under the proper work temperature.
Hydraulic power assisted steering system
2016-01-13
Patent
Electronic Resource
English
IPC: | B62D MOTOR VEHICLES , Motorfahrzeuge |
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