F - Mech Eng,Light,Heat,Weapons – 02 – M
Patent
F - Mech Eng,Light,Heat,Weapons
02
M
123/87
F02M 11/00 (2006.01) F02M 11/02 (2006.01)
Patent
CA 1182355
ABSTRACT OF THE DISCLOSURE An air-fuel mixture intake apparatus for internal com- bustion engines includes a two-barrel carburetor having a pri- mary venturi for supplying an air fuel mixture into a combustion chamber under all loads and a secondary venturi for supplying an air-fuel mixture into the combustion chamber under medium and high loads. The primary venturi is of a fixed cross sec- tion and the secondary venturi is of a variable cross section. A vacuum-operated actuator controls operation of a secondary throttle valve in response to a vacuum developed in the primary venturi and subsequently in the secondary venturi. The secondary throttle valve is interlinked with a primary throttle valve by a linkage mechanism such that the secondary throttle valve is allowed to open when the primary throttle valve opens to a pre- determined degree with the maximum opening of the secondary throt- tle valve being variably contorlled by the opening of the pri- mary throttle valve after the latter has opened beyond the pre- determined degree. A delay valve is disposed in a primary vacuum signal passageway or a common vacuum signal passageway connected to a vacuum chamber of the vacuum-operated actuator to delay an air flow through the passageway toward a vacuum pickup probe in the primary venturi. The secondary throttle valve may be mounted on a shaft displaced downstream off the geometric center of the secondary throttle valve. - 32 -
394504
Ishida Tokuzi
Yokoyama Hiroshi
Kirby Eades Gale Baker
Suzuki Jidosha Kogyo Kabushiki Kaisha
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