Toyota Jidosha Kabushiki Kaisha

Tatsuya Ichikawa

Katsuhiko Hirose

Sumio Kamiya

Akira Shibata

Akihiro Yamanaka

Yoshitsugu Inaguma

Katsutoshi Noda

Kenzo Yano

Kenichiro Shindoh

A fuel injection apparatus for a diesel engine has a fuel injection pump for feeding fuel under pressure and fuel injection nozzles provided in the engine to inject fuel fed from the injection pump. A pressure sensor for detecting fuel pressure is provided in a midway in a fuel line connecting the injection pump to the injection nozzles. An electronic control unit (ECU) computes the frequency of the fuel pressure based on a detected value from the pressure sensor immediately after fuel is injected from the injection nozzles. The ECU then computes a fuel bulk modulus based on the result of the computation of the frequency of the fuel pressure. Based on the computed bulk modulus, the ECU computes a fuel injection start and end time. Further, the ECU adjusts an instruction value for fuel injection control based on the result of the computation of injection start and end, and controls the injection pump based on the adjusted instruction value.

Fuel injection apparatus for engine

A roller bush for a fuel injection pump is interposed between a metal roller and a pin. The roller is forced to contact with a cam reciprocating a plunger, and the pin supports the roller rotatably about a rotational axis at either axial side of the bush. Either axial end portions of the bush entirely consist of ceramic, each portions having the axial length from the corresponding axial end surface of L. The ratio of the axial length L to the entire axial length L0 of the bush is set to be equal to or larger than {(11-d)/16}, where d represents the inner diameter of the bush.

Roller bush for fuel injection pump

Growing community of inventors

Kariya, Japan

Tatsuya Ichikawa