Honda Motor Co., Ltd.

Ryushi Tsubota

Toru Kisaichi

Shingo Nakayama

Koji Terada

Osamu Emizu

Toru Oshita

Noboru Yamashita

Atsushi Sawa

Yoshiyuki Kasai

A cam drive gear for an engine is described where the distance between the axes of a crankshaft and an idle shaft bearing an idle gear thereon can be made smaller, thereby contributing to a reduction in the size of the engine. In addition, a valve-operating system drive gear for an engine is also described where it is possible to restrain a cam chain from chattering at its portion wrapped around a drive sprocket.

Cam drive gear and valve operating system drive gear for engine

A V-type, multicylinder internal combustion engine with multiple isolated crank chambers formed by partitioning a space inside of a crankcase with multiple support walls for supporting a crankshaft, and multiple oil outlet holes, respectively communicating with the isolated crank chambers to separately discharge oil from the multiple isolated crank chambers, uses a single scavenging pump to discharge the oil from the isolated crank chambers rather than connecting multiple scavenging pumps, respectively, to the oil outlet holes. The engine includes an oil collecting pan mounted on a bottom wall of a crank chamber covering the multiple oil outlet holes respectively communicating with the multiple isolated crank chambers for collecting the oil passed through the oil outlet holes. The oil collecting pan has an oil reservoir with an oil outlet opening, and a single scavenging pump for drawing the oil stored in the oil collecting pan through the oil outlet opening.

Multicylinder internal combustion engine

Growing community of inventors

Wako, Japan

Ryushi Tsubota