Internal-combustion engines – Charge forming device – Multiple carburetors
Patent
1979-02-09
1981-01-06
Lazarus, Ronald H.
Internal-combustion engines
Charge forming device
Multiple carburetors
261 23A, 123432, 123442, F02N 1700
Patent
active
042430011
ABSTRACT:
An induction system for a multi-cylinder internal combustion engine that improves fuel efficiency and reduces the emission of unwanted exhaust gas constituents, particularly at the low and medium load conditions. The engine induction system comprises a plurality of separate carburetor barrels which, at least under some running conditions, serve cylinders separately from each other through main induction passages. One carburetor barrel is provided with a different fuel discharge system than the other carburetor barrels for accomodating a certain engine operating condition. A separate sub-intake system connects this carburetor barrel with other cylinders not normally served by the particular carburetor barrel in question. This sub-intake system has a substantially smaller cross-sectional area in the main intake system so that the charge drawn into the cylinders through the sub-intake system enters at a substantially higher velocity. This improves combustion by creating turbulence under at least some operating conditions. In a specific illustrated embodiment, the one carburetor barrel is provided with a choke valve so as to provide cold starting enrichment for all of the cylinders served by this carburetor barrel during cold starting. In accordance with the invention, means are provided for achieving a corresponding flow resistance in the carburetor barrels which do not have the cold starting device so that under other engine operating conditions the flow resistance between the various carburetor barrels is equal. In one embodiment this is done by providing a somewhat smaller venturi section in the other carburetor barrels. In another embodiment, this is done by changing the initial setting of the throttle valve of the one carburetor barrel from the others so as to provide the appropriate resistance differential.
REFERENCES:
patent: 2647502 (1953-08-01), Braun
patent: 3252539 (1966-05-01), Ott
patent: 3319942 (1967-05-01), Mennesson
patent: 3330542 (1967-07-01), Taylor
patent: 3543736 (1970-12-01), Suzuki
patent: 4018199 (1977-04-01), Furucz
patent: 4064850 (1977-12-01), Wakagawa
patent: 4144861 (1979-03-01), Yamashita
Beutler Ernest A.
Lazarus Ronald H.
Yamaha Hatsukoki Kabushiki Kaisha
LandOfFree
Induction system for multi-cylinder engine does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Induction system for multi-cylinder engine, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Induction system for multi-cylinder engine will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-280289