| 摘要 |
PURPOSE: A pulsation and noise reduction device for a hydraulic power steering system is provided to prevent pulsation of oil and noise in a return line efficiently, and to cut down expenses by installing simply and conveniently. CONSTITUTION: A reduction apparatus(60) is composed of a housing(61) having an oil through hole(61a) connected to a return line(20), and an opening(61b) applied by atmospheric pressure; a mass body(62) sliding between the oil through hole and the opening; and an elastic body(63) placed between the opening and the mass body, and compressed or expanded in sliding the mass body. The pulsation and noise reduction apparatus is branched off from the return line. Oil from the return line flows into the housing in flowing oil excessively by reaction force from a wheel, and pushes the mass body to the opening by compressing the elastic body. The housing stores oil by expanding, and prevents pulsation of oil by flowing oil into the return line regularly. The elastic body is restored with moving air in the housing through the opening in reducing the oil amount in the return line, and oil from the housing is streamed to the return line with moving the mass body to the oil through hole. The reduction apparatus prevents oil pulsation and noise by regularly returning oil to an oil reservoir tank(10).
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