Patent Number: 6,637,542

Title: Power steering system with noise reduction

Abstract: A power steering system for automotive vehicles has a construction for reducing noise generated due to pressure change of hydraulic fluid in the power steering system. In the power steering system, an orifice tube is disposed in a joint portion between the first return tube and the second return tube. The orifice tube includes an orifice tube body and a flange, the orifice tube body has an outer diameter equal to an inner diameter of the first return tube so that the orifice tube body can be inserted in the first return tube. The flange has an outer diameter equal to an inner diameter of the second return tube so that the flange can be inserted in the second return tube. The orifice tube has an orifice formed through the orifice tube body and the flange, which has an inner diameter smaller than the inner diameters of the first and second return tubes, so as to control pressure and speed of the hydraulic fluid flowing through the orifice from the first return tube to the second return tube, thereby reducing noise.

Inventors: Cho; Young-Gyun (Seoul, KR)

Assignee: Kia Motors Corporation

International Classification: B62D 5/06 (20060101); F16L 55/027 (20060101); F16L 55/02 (20060101); B62D 005/06 ()

Expiration Date: 10/28/2020