EXHAUST THROTTLE VALVE FOR INTERNAL COMBUSTION ENGINE

An exhaust throttle valve (1) includes a housing (2) formed with a gas passage (2a), first and second valve shafts (4) rotatably journaled in the housing (2), a large valve body (5) connected to the first valve shaft, and a small valve body (6) connected the second valve shaft (4). A communication h...

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Bibliographische Detailangaben
Hauptverfasser: UTO, AKIHIRO, IKEDA, SATOSHI, NOGUCHI, NAOTO
Format: Patent
Sprache:eng ; fre ; ger
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Zusammenfassung:An exhaust throttle valve (1) includes a housing (2) formed with a gas passage (2a), first and second valve shafts (4) rotatably journaled in the housing (2), a large valve body (5) connected to the first valve shaft, and a small valve body (6) connected the second valve shaft (4). A communication hole (17) is provided in the large valve body (5), and urging means that urges the small valve body (6) in a direction of abutting against the large valve body (5) is provided in the second valve shaft (4). When the large valve body (5) closes the gas passage (2a) and pressure of a gas in the gas passage (2a) increases from a state where the small valve body (6) closes the communication hole (17), the small valve body (6) is separated from the large valve body (5) against an urging force of the urging means to open the communication hole (17). With an easy configuration, exhaust gas pressure can be adjusted without depending on a gas temperature difference.