Internal combustion engine

Details Internal combustion engine Internal combustion engine

1976-04-20

1978-09-19

Hart, Douglas

Power plants

Internal combustion engine with treatment or handling of...

By means producing a chemical reaction of a component of the...

60282, 123127, 123198F, F02B 7510, F02M 1306, F02D 900

Patent

active

041143744

ABSTRACT:
Disclosed is an internal combustion engine for an automobile having at least one cylinder associated with a primary intake system and another cylinder or cylinders associated with a secondary intake system. Each of the primary and secondary intake systems comprises a choke valve, a throttle valve and a carburetor. The engine includes a throttle valve controlling device adapted for operation in response to a negative pressure fluctuating according to the degree of opening of the throttle valve in the secondary intake system for maintaining the throttle valve in the secondary intake system in the vicinity of its idling position when the throttle valve in the primary intake system is in the vicinity of its idling position and opening fully the throttle valve in the secondary intake system when the throttle valve in the primary intake system is far away from its idling position. Also included is a fuel supply controlling device adapted to close a main fuel passage in the carburetor of the secondary intake system when the throttle valve in the primary intake system is open to an extent narrower than a predetermined level, while opening the main fuel passage when the throttle valve in the primary intake system opens to its predetermined level or wider. Thus, the engine operates at medium or light loads with smaller pumping and friction losses and a smaller fuel consumption and discharges a smaller amount of harmful exhaust gas. The cylinder associated with the primary intake system may be a cylinder having an ordinary combustion chamber or alternatively, a cylinder adapted for operation with a lean fuel-air mixture and having a main combustion chamber and an auxiliary combustion chamber communicating with each other through a passage in which sparking electrodes are located.

REFERENCES:
patent: 2623617 (1952-12-01), Snyder
patent: 3512510 (1970-05-01), Manning
patent: 3791144 (1974-02-01), Lang
patent: 3926158 (1975-12-01), Dolza
patent: 4019479 (1977-04-01), Garabedian

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