Mazda Motor Corporation

Hideshi Terao

Yasuyoshi Hori

Tetsushi Hosokai

Masayuki Tetsuno

Kiyotaka Mamiya

Kouhei Iwai

Futoshi Nishioka

Michihiro Imada

Kunitomo Minamitani

Misao Fujimoto

Isao Shimizu

Masaki Harada

Noriaki Mitobe

Kenji Oka

A fuel control unit and a fuel injection control method for a multi-cylinder engine adjust the pulse width of asynchronous injection so as to set the air-fuel ratio of a fuel-air mixture in a first cylinder to 17 or more but under 21 if it is determined according to an engine speed (Ne) that an engine is in an idling mode and if it is determined according to the opening of a throttle valve that a condition for starting the acceleration of the engine has been satisfied. The foregoing first cylinder is the cylinder in which compression pressure increases first following the determination described above.

Fuel control unit and fuel injection control method for multi-cylinder

A lean burn engine adapted to establish a specified air-fuel ratio leaner by predetermined rate than a stoichiometric air-fuel ratio in a range of low engine speeds and low engine loads is provided with an air intake system of a low speed type which provides a high charging efficiency in a range of low engine speeds and an exhaust system capable of eliminating a nitrogen oxide emission in the exhaust even during lean burning.

Lean burn engine for automobile

Growing community of inventors

Higashihiroshima, Japan

Hideshi Terao