DIAPHRAGM AIR VALVE AND SECONDARY AIR-CONTROLLING DEVICE FOR INTERNAL COMBUSTION ENGINE,申请号WO2003JP14696-传众专利搜索

DIAPHRAGM AIR VALVE AND SECONDARY AIR-CONTROLLING DEVICE FOR INTERNAL COMBUSTION ENGINE

申请公布号：WO2004061280(A1)

申请号：WO2003JP14696

申请日期：2003.11.19

申请公布日期：2004.07.22

申请人：

MIKUNI CORPORATION;TASHIRO, MOTOMICHI;SUZUKI, YASUO;SATO, TSUYOSHI

发明人：TASHIRO, MOTOMICHI;SUZUKI, YASUO;SATO, TSUYOSHI

分类号：F01N3/30;F01N3/05;F01N3/22;F01N3/34;F16J3/02;F16K31/126;(IPC1-7):F01N3/34

主分类号：F01N3/30

摘要：<p>A diaphragm air valve and a secondary air-controlling device, provided with the valve, for an internal combustion engine are provided. The diaphragm air valve comprises a valve body (36) operated by a diaphragm (34), two valve seats (37, 38) provided on both sides in a moving direction of the valve body and selectively opened/closed by the valve body (36), and urging means for urging the valve body (36) toward one (37) of the valve seats. The urging means is constructed from a pair of series-connected springs (39a, 39b) with different elastic moduli. The diaphragm air valve is capable of preventing after-burn during rapid deceleration of an engine and leakage of exhaust noise during rapid acceleration, and capable of achieving reliable exhaust gas purification in other operating conditions.</p>