Fuji Jukogyo Kabushiki Kaisha

Nissan Motor Company Limited

Yoshiaki Kasai

Masaaki Ohgami

Masaharu Yuasa

Hiroyuki Nakamura

Mitsuo Nakamura

Ichiro Kudo

Masao Saito

Yasuo Hiraoka

Tatsuhisa Fukushima

Masataka Harada

A system is provided with a sensor for sensing the vibration of the engine, and control means responsive to an output of the sensor at a condition of knocking in the engine and for producing a knock signal. A control means is provided responsive to the knock signal for enriching the air-fuel mixture supplied to the engine so as to prevent the knocking. The system further comprises an ignition timing control system responsive to the knock signal for retarding the ignition timing.

System for preventing knocking in a combustion engine

A fuel-vapor emission control system has a canister having a vacuum operated purge control valve, communicated with a float chamber of a carburetor and a fuel tank for purging fuel-vapor. A vacuum chamber of the vacuum operated purge control valve is communicated with a port provided in the carburetor so as to apply manifold vacuum to the vacuum chamber at partial-throttle operation. Parallel purge lines are provided for communicating the canister with an intake manifold of the engine. A solenoid operated valve is provided in one of the purge lines for controlling the purging of the fuel-vapor. The solenoid operated valve is opened for the purging by a signal from a vehicle or engine speed sensor under such conditions that the engine does not stall.

Fuel-vapor emission control system for an automotive engine

An actuator control system for an internal combustion engine idling speed governor mounted on a vehicle includes an actuator for actuating a throttle valve, an ignition switch for producing an ignition turning off signal, an engine speed signal generating circuit, an engine speed increasing signal generating circuit, an engine speed decreasing signal generating circuit, an actuator control circuit for operating the actuator in opposite direction in accordance with engine speed increasing and decreasing signals. A time lag signal generating circuit is provided to be responsive to said ignition turning off signal to generate a signal after a predetermined time. A logic gate is provided to be responsive to the ignition turning off signal for operating the actuator control circuit so as to close the throttle valve from the idling open position to the closed position. Another logic gate is provided to be responsive to the time lag signal for operating the actuator control circuit so as to open the throttle valve from the closed position to the idling open position.

Actuator control system for an engine idling speed governor

An engine idling speed control system for an internal combustion engine comprising an actuator for actuating a throttle valve for increasing and decreasing the idling speed, an engine speed signal generating circuit, an engine speed increasing signal generating circuit and an engine speed decreasing signal generating circuit, a vehicle speed detecting circuit for generating a signal when the vehicle speed is lower than a predetermined value, an idling signal generating circuit for generating an idling signal in the idling operation of the engine, an engine speed detecting circuit for producing a signal when the engine speed is higher than a predetermined value, and an actuator control circuit for operating the actuator in opposite directions in accordance with engine speed increasing and decreasing signals. A logic gate circuit is provided to be operated by the signal from the vehicle speed detecting circuit, idling signal and signal from the engine speed detecting circuit for enabling the engine speed increasing and decreasing signals for performing an automatic idling speed control.

Engine speed control system

A system for electronically detecting the transient state of engine operation of an internal combustion engine having a spark ignition system. A measuring circuit counts pulses having the pulse separation of the ignition timing of the spark ignition system and produces data output. A plurality of memorizing circuits are provided for memorizing old data output from the measuring circuit and a subtractor compares the old data output and the memorizing circuit with the new data output from the measuring circuit and produces the difference between the data and the amount of the difference. The output of the subtractor is used for correcting the air-fuel ratio of the air-fuel mixture of an emission control system using a three-way catalytic converter.

Growing community of inventors

Kiyose, Japan

Yoshiaki Kasai