Patent ID: 6183213
Filing Date: 2001-02-06
Classification: B62D,F04C

Abstract:
A hydraulic pump for use in a power steering system, comprising:a pump housing;a power steering fluid inlet port formed in said pump housing and in communication with a power steering fluid reservoir;a power steering fluid chamber formed in said pump housing and in communication with said power steering fluid reservoir to receive said power steering fluid from said fluid inlet port;a first fluid conduit having a first fluid conduit inlet opening and a first fluid conduit exit opening, said first fluid conduit inlet opening being in fluid communication with said power steering fluid chamber to receive said power steering fluid therethrough;a second fluid conduit having a second fluid conduit opening inlet and a second fluid conduit exit opening said second fluid conduit inlet opening being in fluid communication with said power steering fluid chamber to receive power steering fluid therethrough;an integral pressure wave attenuator in communication with both said first fluid conduit exit opening and second fluid conduit exit opening to receive said power steering fluid therefrom;said second fluid conduit have a distance between said second fluid conduit inlet opening and said second fluid conduit exit opening that is longer than a distance of said first fluid conduit between said first fluid conduit inlet opening and said second fluid conduit exit opening in order to reduce the amount of fluid borne noise generated by pumping of the fluid; anda pump outlet in communication with said integral pressure wave attentuator to convey said power steering fluid from said pressure wave attenuator to a steering gear.