Mitsubishi Jidosha Kogyo Kabushiki Kaisha

Kensuke Yanagawa

Masayuki Yamashita

Fumiaki Hiraishi

Nozomu Nakamura

Takashi Kawabe

Koji Hata

An engine control device is provided which includes a first fuel injection valve; a second injection valve provided at such a position that the amount of fuel injected by the second fuel injection valve and adhering to the inner peripheral wall of a cylinder is smaller; a cooling water temperature detector for detecting the temperature of cooling water for cooling an engine; and an injection ratio determining arrangement for determining the ratio between the amount of fuel injected by the first fuel injection valve and the amount of fuel injected by the second fuel injection valve based on the temperature of cooling water. The injection ratio determining arrangement stores an injection amount adjustment operation range in which the injection ratio determining arrangement is configured to increase the fuel injection ratio of the amount of fuel injected by the second fuel injection valve, when the temperature of cooling water falls.

Engine control device

A controlling apparatus for an engine, includes: an auto-ignition index calculating unit that is configured to calculate, based on a cylinder temperature and a cylinder pressure in a combustion chamber, an auto-ignition index which indicates easiness of occurrence of auto-ignition of fuel at a crank angle before an ignition timing in a compression stroke; a first correction coefficient calculating unit that is configured to calculate, based on an amount of fuel adhering to a wall surface of the combustion chamber at the crank angle, a wall-adhering fuel correction coefficient for correcting the auto-ignition index; and a low-speed pre-ignition predicting unit that is configured to predict, based on the auto-ignition index and the wall-adhering fuel correction coefficient, occurrence of low-speed pre-ignition.

Controlling apparatus for engine

A control device of an engine, the engine including: a piston contained in a cylinder; an intake passage communicated to a combustion chamber of the cylinder; an exhaust passage led from the combustion chamber; a fuel injection valve configured to inject fuel to the combustion chamber or the intake passage; and an ignition unit provided in the combustion chamber, includes: a low speed pre-ignition predicting unit configured to perform prediction of occurrence of low speed pre-ignition, based on operation condition of the engine; and a lubricating oil injection controlling unit configured to control a lubricating oil injecting device to inject lubricating oil to the piston or a member located around the piston, based on the prediction of the occurrence of the low speed pre-ignition performed by the low speed pre-ignition predicting unit.

Growing community of inventors

Tokyo, Japan

Kensuke Yanagawa