Internal-combustion engines – Intake manifold – Manifold tuning – balancing or pressure regulating means
Patent
1975-07-17
1976-12-14
Nilson, Robert G.
Internal-combustion engines
Intake manifold
Manifold tuning, balancing or pressure regulating means
123139BC, F02M 3900
Patent
active
039969100
ABSTRACT:
A fuel injection system for internal combustion engines comprising a sensor for detecting the intake air flow rate, a device for metering the fuel in association with the sensor, a fuel delivery device for delivering the fuel to be metered by the device, and fuel injection nozzles for injecting the fuel delivered from the fuel metering device into the cylinders or an intake manifold of the engine. The housing of the fuel metering device includes fuel outlets communicated with the fuel injection nozzles, respectively, a fuel inlet communicated with the fuel delivery device, a rotor which is rotated in synchronism with the operation of the engine, and a control shaft which is displaced relative to the rotor depending upon the intake air flow rate detected. In one preferred embodiment of the present invention, the control shaft is provided with a plurality of radial communication slits which are circumferentially equiangularly spaced apart with each other and are formed through the tubular wall of the control shaft, the inner opening of each of the communication slits being opened into a fuel passage formed within the control shaft and communicated with the fuel inlet, and the outer opening being opened at the outer peripheral surface of the control shaft. The rotor is provided with a fuel distribution slot formed through the tubular wall thereof for communication with the fuel outlets, said fuel distribution slot being sequentially communicated with each of the communication slits of the controlshaft which is axially slidably fitted into the cylindrical bore in the rotor. As the rotor is rotated, the fuel distribution slot thereof sequentially overlaps with the communication slits of the control shaft so that the metered fuel may be sequentially delivered to the outlets. The control shaft is operatively coupled to the sensor so that the former may be axially displaced relative to the rotor in response to the intake air flow rate. Therefore, the overlap area between the distribution slit and the communication slits changes in response to the intake air flow so that the quantity of fuel to be delivered to the fuel injection valves are controlled in the optimum manner in response to the intake air flow rate.
REFERENCES:
patent: 2955583 (1960-10-01), Dahl
patent: 3680535 (1972-08-01), Eckert
Noguchi Masaaki
Tanaka Taro
Tanaka Yukiyasu
Nilson Robert G.
Nippon Soken Inc.
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