Nissan Motor Company Limited

Aichi Machine Industry Co., Ltd.

Shuichi Nishimura

Makoto Yasuda

Isaya Matsuo

Masami Kato

Munehiro Sagata

Syousabu Ura

Syouzabu Ura

Yoichi Hara

Michihiro Yamane

Masafumi Ito

Akinobu Yoshibe

An internal combustion engine has an intake valve and an exhaust valve. When the engine operates at low speed with low and medium load, the intake valve is operated to close at a relatively advanced timing for increased volumetric effeciency and increased real compression ratio. When the engine operates at low speeds with high load, the exhaust valve is operated to close at a relatively retarded timing with the intake valve being operated to close at the relatively advanced timing, whereby the volumetric efficiency is subject to a drop to prevent occurrence of knocking.

Compression ratio control for internal combustion engine

In order to minimize the supercharging effect from the cylinder to cylinder and to maximize the efficiency of the inertia supercharging effect over essentially the whole engine speed range, first and second elongate collectors which communicate with separate banks of cylinders are interconnected at essentially their mid points by a connection tube having a selected length and cross-sectional area. An engine speed responsive valve disposed in the tube or pipe selectively induces the situation wherein quasi separate induction systems are defined for each bank of cylinders or a single enlarged system is established.

Inertia supercharging induction system for multi-cylinder internal

In an induction system for an internal combustion engine having two groups of cylinders of which firing orders are respectively discontinuous, a groove is formed in a joining end face of a collector unit to be joined with a joining end face of an intake manifold in such a manner as to have a straight main groove section disposed between first and second groups of outlet ports so as to be equidistant from the outlet ports and a plurality of outlet groove sections branching off from the main groove section to fluidly connect the main groove section to each outlet ports. When the joining end faces of the collector unit and the intake manifold are joined together, a fluid recirculation passage such as a blow-by gas recirculation passage, an exhaust gas recirculation passage or the like is defined therebetween.

Induction system for internal combustion engine

In a V-type internal combustion engine, an auxiliary air supply apparatus includes an auxiliary air distribution pipe which communicates directly to two or more mutually independent chambers in the intake system of the engine. This auxiliary air distribution pipe is connected and communicates to an auxiliary air channel so as to bypass an intake throttle valve. In this auxiliary air channel an auxiliary air control valve is installed to control the volume of auxiliary air flowing through the channel, according to the operating condition of the engine. Because of this, the auxiliary air controlled by the control valve is directly distributed to two or more chambers through the auxiliary air distribution pipes.

Auxiliary air supply apparatus for an internal combustion engine

Growing community of inventors

Yokohama, Japan

Shuichi Nishimura