Mazda Motor Corporation

Ken Ohtsuki

Einosuke Suekuni

Hiroshi Hosokawa

Yoshiyuki Uehane

Tsuyoshi Kojima

Kimio Ishida

Masayuki Murata

Yasuo Fujitsuku

Hiroshi Abe

Junji Watanabe

Seigo Takeno

Yasuhiro Sudo

An intake passage structure for a turbocharger-equipped engine () includes a supercharging passage () and an air relief passage () that are provided in a compressor case (). The air relief passage () has a first passage () and a second passage (), each of which is in a non-linear shape. The first and second passages () and () each have an air outflow port () formed through an inner wall surface of an upstream portion () of the supercharging passage () upstream of a compressor (). The air outflow ports () are formed through different portions of the inner wall surface in a circumferential direction of the inner wall surface so as to overlap with each other in a direction along a central axis of the upstream portion ().

Intake passage structure for turbocharger-equipped engine

An engine has a crankshaft and a plurality of cylinders arranged in a row in a direction parallel to the crankshaft. Combustion in the cylinder adjacent to each end portion of the crankshaft to suppress bending strain of the crankshaft at said one end portion. The vibration control conditions of controlling combustion in the cylinders adjacent to the respective end portions of the crankshaft are set on the basis of properties of vibration of the engine and resonant frequencies at the respective end portions of the crankshaft and the conditions of combustion in the respective cylinders are controlled on the basis of the vibration control conditions set for the respective cylinders.

Method of controlling engine

Growing community of inventors

Hiroshima, Japan

Ken Ohtsuki