Nissan Motor Company Limited

Kazuhiro Fujiwara

Yoshinori Yakabe

Kazuyuki Kogiso

Kazuya Matsuoka

Haruki Morita

Yoshikazu Tsuruoka

Shigehiro Yamaki

A variable air intake control system includes first and second variable intake control valves, a vacuum tank, actuators, a one-way valve and a controller. The controller selectively is configured to control the first and second actuators to offset operating timings of the first and second variable intake control valves so as to suppress the noise in the one-way valve, when the first and second variable intake control valves are switched from a first operating state in which the first and second variable intake control valves are both in one of the open and closed states to a second operating state in which the first and second variable intake control valves are both in one of the open and closed states that is opposite to the first operating state.

Variable air intake control system

An intake manifold () of a multi-cylinder internal combustion engine comprises a single pipe portion (), a collector () connected to the pipe portion (), and a plurality of branch pipes () branching from the collector () to each cylinder. The pipe portion () and the collector () divided into a plurality of spaces () by a partitioning member (). Blow-by gas is equally distributed to each cylinder using a simple structure comprising a discharge vent () for blow-by gas in the pipe portion () extending over the partitioning member () and being equal to the two spaces (). It is preferred that a notch () is formed facing the discharge vent () on the partitioning member ().

Intake manifold for internal combustion engine

Growing community of inventors

Atsugi, Japan

Kazuhiro Fujiwara