Mazda Motor Corporation

Yoshiyuki Matsumoto

Eiji Nakai

Masami Nakao

Hiromu Sugano

Kazuaki Hokazono

Masanori Sahara

Yuki Koda

Masaru Yamamoto

Tunehiro Mori

Naoki Okada

Tsunehiro Sato

Kouji Habu

Tetsuya Date

Kazutoshi Matsuyama

Yusuke Ikushima

Hirotoshi Saito

A diesel engine control system and control method capable of conducting accurate fuel injection unaffected by variations in injector performance caused by differences among individual injectors or change with aging. The diesel engine control system includes an injector for directly injecting fuel into a combustion chamber of a diesel engine, injection quantity controller for controlling fuel injection quantity by varying a period of electric current supply to the injector, estimator for estimating that an electric current supply period when a prescribed (stable) combustion state is obtained is the current supply period for injecting the amount of fuel required for the prescribed combustion state, and control data correcting device for correcting control data of the injection quantity controller based on the estimated current supply period.

Diesel engine control system and control method

According to the invention, an EGR control apparatus of an engine includes intake ports to which an intake passage is connected, the intake ports opening into each combustion chamber of the engine, an EGR port to which an EGR passage branching out from an exhaust passage is connected, the EGR port opening into each combustion chamber of the engine, an electrically-operated compressor disposed in the EGR passage for regulating pressure at which EGR gas is introduced into each combustion chamber, and an EGR control valve disposed in the EGR passage at a point downstream of the electrically-operated compressor for controlling the amount of EGR gas introduced into each combustion chamber. The EGR passage branches out from the exhaust passage at a point downstream of an emission control device disposed in the exhaust passage.

EGR control apparatus for engine

Growing community of inventors

Hiroshima, Japan

Yoshiyuki Matsumoto