Nissan Motor Company Limited

Shoji Tange

Yasuhiko Nakagawa

Ryuzaburo Inoue

Minoru Imajyo

A fuel system includes a motor-driven pump which pressurizes a source of fuel to a predetermined pressure level and delivers the pressurized fuel to an engine-driven pump which, in turn, communicates with high-pressure fuel injectors for supplying high-pressure fuel into respective cylinders of an engine during normal engine operation. A low-pressure fuel injector is provided which is connected to the discharge side of the motor-driven pump for supplying low-pressure fuel into an engine intake manifold near its entrance only during the engine is being cranked.

Fuel system for internal combustion engine

A fuel supply system of an internal combustion engine for an automotive vehicle, comprising engine load detecting means operative to detect load on the internal combustion engine and to produce an output signal representative of the detected engine load; an electrically-operated fuel-injection nozzle assembly projecting into a combustion chamber of a power cylinder of the engine and operative to inject fuel into the combustion chamber; and an electric control unit electrically connected to the engine load detecting means and the fuel-injection nozzle assembly and operative to produce control signals to determine the durations of fuel injection and the fuel injection timings of the nozzle assembly on the basis of the signals, the fuel injection timings being determined to occur in the presence of a relatively low gas pressure in the combustion chamber.

Fuel supply system of internal combustion engine

An electronically controlled fuel injection system for an internal combustion engine which determines the pulsewidth of a drive signal to be applied to a plurality of fuel injection valves, each located within an intake manifold, which in turn determines the fuel injection amount per engine revolution according to the engine operating conditions, the air-fuel mixture ratio being smoothly changed from a lean air-fuel mixture ratio to a richer air-fuel mixture ratio when the engine load changes from a partial load to a full load. Therefore, fuel consumption is remarkably reduced without worsening the handling of the vehicle in which the fuel injection system is incorporated.

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Yokosuka, Japan

Shoji Tange