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Development of Quieter Variable-Displacement Vane Pump for Hydraulic Power Steering System
Technical Paper
2002-08-0440
Sector:
Event:
JSAE Autumn Conference
Language:
Japanese
Abstract
This paper presents development research of a quieter (low- fluid-borne noise level) variable-displacement vane pump for hydraulic power steering systems. A new cam ring profile for preventing vane bounce called the ""modified profile can ring"" is proposed and its effectiveness is examined by noise tests in the passenger compartment of a real car as well as measurements of pump source flow ripple in the bench test circuit. The proposed cam ring is found to be able to reduce fluid-borne noise at least to the level of a fixed pump. Newly developed pumps have already been put into practice.