Toyota Jidosha Kabushiki Kaisha

Aisin Seiki Kabushiki Kaisha

Suzuki Motor Corporation

Kazuyoshi Shimatani

Noboru Takagi

Toshiki Sato

Hirotaka Watanabe

Masahiro Yoshida

Takahiko Aoyagi

Yoshinobu Uchiyama

Takayuki Hosogi

Kenta Sugimoto

Yasunobu Toyoda

Hisayuki Ito

A control device for an onboard engine is configured to control the oil discharge pressure of an oil pump and execute, when determining that there may be an abnormality in the control of the oil discharge pressure, a change process that increases the target discharge pressure to a value that is greater than that before it is determined that there may be an abnormality in the control. When a discharge pressure sensor value in a situation in which the discharge pressure is being controlled based on the target discharge pressure increased through execution of the change process does not become greater than or equal to a discharge pressure threshold, the control device sets an upper limit for the engine rotation speed and increases the upper limit as the discharge pressure sensor value increases.

Control device and control method for onboard engine

There is provided a fuel injection device. Based on a current intake air pressure and a previous intake air pressure of an engine at the predetermined crank position, an intake air pressure variation of the engine at the predetermined crank position is calculated as a measured intake air pressure variation. Based on the current rotational speed and the previous rotational speed of the engine at the predetermined crank position, and a fully-closed-state intake air pressure conversion data item, the fully-closed-state intake air pressure variation of the engine at the predetermined crank position is calculated. The measured intake air pressure variation is corrected based on the fully-closed-state intake air pressure variation. Based on the corrected measured intake air pressure variation, the current rotational speed at the predetermined crank position, and the transient fuel injection quantity conversion data item, the transient fuel injection quantity at the predetermined crank position is determined.

Fuel injection device

Growing community of inventors

Hamamatsu, Japan

Kazuyoshi Shimatani