Honda Motor Co., Ltd.

Yamada Manufacturing Co., Ltd.

Kazuhiko Iso

Takashi Kondo

Kouichi Ikoma

Yasunori Ono

Atsushi Kaneko

Akinori Maezuru

Yojiro Koiwa

Masakazu Kinoshita

Koichi Eto

Yoshihiro Okada

Atsushi Yanagisawa

Secondary vibration generated accompanying reciprocation of a piston () of a multi-link variable compression ratio engine (E) can be eliminated effectively, even when the direction of the secondary vibration is inclined relative to a cylinder axis (L), by inclining the direction (shown by arrow) of an excitation force generated by a secondary balancer system () so that it coincides with the direction of the secondary vibration. The secondary balancer system () is formed by supporting balancer weights () on a pair of balancer shafts () rotating in directions opposite to each other, and by displacing the phases of these balancer weights () the direction of the excitation force generated can be inclined so as to coincide with the direction of secondary vibration of the engine (E).

Engine vibration elimination system and variable stroke characteristic engine

An oil pump in which pulsation vibration due to the dynamic pressure on the discharge port side can be attenuated. In an oil pump for transporting fluid from a suction port to a discharge port by the rotation of a rotor mounted in a pump casing, a resonator configured from an introduction path and a chamber is formed with respect to a discharge flow channel that communicates with the discharge port in the flow direction of the discharge flow channel. A channel in a direction different to the flow direction of the discharge flow channel is communicatingly formed in the vicinity of the resonator.

Oil pump

Growing community of inventors

Saitama-ken, Japan

Kazuhiko Iso