Internal-combustion engines – Charge forming device – Fuel injection system
Patent
1981-05-22
1983-03-15
Feinberg, Craig R.
Internal-combustion engines
Charge forming device
Fuel injection system
123577, F02M 5100
Patent
active
043764339
ABSTRACT:
A supplemental fuel system that renders a carburetor-based primary fuel system capable of operating on ethanol, methanol, or gasoline utilizing single point fuel injection at the induction port of the intake manifold while continuing to use the existing carburetor to meter air and typically fuel as well. The fuel injection is implemented by an injector plate that fits between the carburetor mounting flange on the intake manifold and the carburetor baseplate that carries a first idle injector, a first run injector, a second idle injector, and a second run injector, each operable to atomize alcohol fuel for incorporation into the air or air-fuel mixture flowing through the carburetor. The injectors are supplied by a valved conduit arrangement with the configuration of the valves being controlled by a three-position mode selector switch. The system operates in a selected one of three modes, selected on the basis of whether the vehicle fuel tank contains ethanol, methanol, or gasoline. In the first mode, the first idle injector is supplied with fuel while the second idle and run injectors are cut off. Depending on engine operating parameters including engine load and throttle position, an appropriate amount of fuel is supplied to the first run injector. Similarly, in the second mode, the first idle and run injectors are cut off, and fuel is supplied on a continuous basis to the second idle injector and on a demand basis to the second power injector. In the third mode, all the injectors are cut off, and fuel is supplied to the carburetor in the normal fashion. Each injector preferably comprises one or more impingement pin nozzles.
REFERENCES:
patent: 3893434 (1975-07-01), Thatcher et al.
patent: 4100896 (1978-07-01), Thatcher et al.
patent: 4140088 (1979-02-01), de Vulpillieres
patent: 4231333 (1980-11-01), Thatcher et al.
patent: 4235205 (1980-11-01), Fukui et al.
All American Fuel Systems
Cross E. Rollins
Feinberg Craig R.
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