Toyota Jidosha Kabushiki Kaisha

Other

Ichiro Sakata

Yoshihiro Hotta

Kiyomi Nakakita

Yoshimasa Watanabe

Masato Gotoh

Tatsuji Mizuno

Kiyomi Kawamura

Yoshifumi Wakisaka

Kazuhiro Akihama

Kazuya Kibe

Takayuki Fuyuto

Kazuhisa Inagaki

Minaji Inayoshi

A pressure boosting unit () is provided in each fuel injection valve of an engine (). A pressure of fuel to be supplied to the fuel injection valve from a common rail () is boosted as required. An ECU () causes low pressure injection to be performed with the pressure boosting unitbeing in a non-operated state, and high pressure injection to be performed with the pressure boosting unit () being in an operated state, and the pressure of the fuel being maintained at a boosted pressure. Based on the result, the ECU () corrects a fuel injection period of the fuel injection valve. Also, after the correction of the fuel injection period is completed, fuel injection is performed before the pressure of the fuel reaches the boosted pressure after the pressure boosting unit starts to be operated. Based on the result, operation starting timing of the pressure boosting unit is adjusted.

Fuel injection amount correction method for pressure boosting fuel injection apparatus

A state of combustion in a combustion chamber is controlled by stratifying an intake gas charge within the combustion chamber, so as to reduce amounts of harmful substances left in exhaust gas. A direct-injection type internal combustion engine in which a fuel is injected into the combustion chamber and which is arranged to stratify the intake gas charge within the combustion chamber ( ) such that intake gases of different compositions exist in a central portion ( ) of the combustion chamber including a position of the fuel injection, and in a peripheral portion of the combustion chamber, upon initiation of combustion of the fuel at a point of time near a terminal period of a compression stroke. The intake gases of different compositions may be intake gases having different concentrations of a specific component such as recirculated exhaust gas and the fuel.

Direct injection type internal combustion engine

According to the present invention, there is provided a fuel injecting device for injecting fuel into a cylinder of an engine. A fuel injector injects a main fuel charge into the cylinder at a predetermined first timing, and the fuel injector injects additional fuel into the cylinder at a predetermined second timing which is different from the predetermined first timing. It is judged if an amount of fuel adhering to an inner wall of the cylinder is larger than a predetermined fuel amount when the fuel injector injects the additional fuel. The fuel injector inject the additional fuel such that an amount of fuel adhering to the inner wall of the cylinder becomes smaller than the predetermined fuel amount when it is judged that an amount of fuel adhering to the inner wall of the cylinder is larger than the predetermined fuel amount.

Fuel injecting device for an engine

Growing community of inventors

Susono, Japan

Ichiro Sakata