Internal-combustion engines – Engine speed regulator – Responsive to deceleration mode
Patent
1980-07-22
1983-01-04
Cuchlinski, Jr., William A.
Internal-combustion engines
Engine speed regulator
Responsive to deceleration mode
123587, 123198DB, 261DIG19, F02D 3100
Patent
active
043667902
ABSTRACT:
A fuel-saving and emission reduction system for internal combustion engines includes electronic carburetor controlling circuitry and a carburetor by-pass system which stops fuel flow to the engine when power from combustion is not required. A normally open by-pass control butterfly valve in the fuel/air passage between the throttle valve and the engine intake manifold is operated by a motor, such as a solenoid or the like, under control of the controlling circuitry and is closed only upon release of the engine throttle and during the period that the vehicle has sufficient speed to assure restart upon reapplication of the fuel/air flow. A carburetor by-pass valve is held in a normally closed position by the combined effects of spring bias and the normal vacuum in the fuel/air passage. When the normally open by-pass control butterfly is closed, the fuel/air vacuum is reduced to permit the spring biased normally closed self-regulating carburetor by-pass valve to admit filtered air at a predetermined reduced vacuum to the engine manifold for continued operation of vacuum accessories and also for reducing the amount of oil drawn past combustion chamber seals and valve guides. Associated with the carburetor by-pass valve is a carburetor vent valve which is simultaneously opened to admit filtered air to the fuel/air passage between the throttle valve and the by-pass control butterfly to thereby eliminate all vacuum that will draw fuel from the carburetor. As a further feature, the electronic controlling circuitry operates to close the by-pass control butterfly for about one-half second upon the opening of the ignition switch to thereby eliminate self-ignition or dieseling and reduced hydrocarbon emissions.
REFERENCES:
patent: 3371914 (1968-03-01), Walker
patent: 3795237 (1974-03-01), Denton
patent: 3982507 (1976-09-01), Asaka et al.
patent: 4106471 (1978-08-01), Nakajima et al.
patent: 4194477 (1980-03-01), Sugiyama
Castle Linval B.
Cuchlinski Jr. William A.
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