| 摘要 |
PROBLEM TO BE SOLVED: To provide a PCV valve system for preventing generation of an abnormal sound and abnormal abrasion, by restraining an internal valve element from vibrating by self-excitation. SOLUTION: This PCV valve system has a cylindrical valve housing 11 for respectively arranging an inlet port 111 and an outlet port 112 in both end walls, a PCV (positive crankcase ventilation) valve 1 having the tapered valve element 12 arranged in the shaft direction in the valve housing 11 and capable of varying the opening area A of the outlet port 112 and a spring body 13 arranged between the housing 11 and the valve element 12 and energizing and supporting the valve element 12 in the direction for the valve element 12 to increase the opening area A of the outlet port 112, and a downstream side pipe 2 connected to the outlet port 112 of the PCV valve 1. An upstream side orifice 113 or a downstream side orifice is provided in any of the upstream side of the inlet port 111 or the downstream side of the outlet port 112. COPYRIGHT: (C)2006,JPO&NCIPI
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