Nippondenso Co., Ltd.

Toyota Jidosha Kogyo Kabushiki Kaisha

Sinya Sumitani

Masahiko Miyaki

Akira Masuda

Shinji Ichikawa

Toshio Tanahashi

Toshimi Matsumura

Takashi Hasegawa

Takahiro Hayakawa

Toshihiko Ohmori

Takio Tani

Takao Okuno

Takeo Matuura

A distribution type fuel injection pump includes a control cylindrical bore into which a control plunger is fitted. The control plunger partitions the control cylindrical bore into first and second chambers. The same pressure as that of fuel in the pumping chamber (which serves to feed fuel) is transmitted to the first chamber, while fuel is supplied to the second chamber through a control passage. An electromagnetic valve is arranged in the control passage and the amount of fuel with which the second chamber is filled is adjusted by controlling the electromagnetic valve.

Fuel injection pump of the distribution type

The engine speed is periodically detected at every predetermined crankshaft angles for obtaining a plurality of engine speed data whose number equals an integral multiple of the number of cylinders of an internal combustion engine. Either maximum or minimum values among the plurality of engine speed data is determined, and such operations are repeated for a duration covering all power strokes within all the cylinders, thereby obtaining a plurality of sets of engine speed data. Then the order of engine speed data giving the maximum or minimum value within each set is obtained, and majority decision is effected to determine which order of data gives the maximum or minimum most frequently throughout all the sets. The difference between the maximum and minimum values is obtained for each set, and the amount of fuel to be supplied to the engine is controlled so that the difference becomes common to all the cylinders. The fuel amount control may be effected by means of an actuator which controls the position of a spill ring of a distributor injection pump.

Apparatus and method for controlling amount of fuel injected into engine

An improved throttle valve assembly of the type which includes a throttle body provided with a throttle lever and a second, intermediate lever interconnected with each other by a roller/cam slot mechanism, said throttle lever being adapted to be moved by said second lever which is connected through the throttle linkage to the accelerator. The improvement comprises means disposed between the throttle lever and the second lever for adjusting the clearance existing between the cam slot and roller when the throttle valve is located in the vicinity of the idle position thereof, so that the excessive play that would otherwise arise at the accelerator when the throttle valve is in the idle position is reduced or avoided.

Throttle valve assembly

Growing community of inventors

Kariya, Japan

Sinya Sumitani