Honda Giken Kogyo Kabushiki Kaisha

Hidemi Arai

Kazuaki Shimoyama

Koichi Fukuo

Takashi Sugai

Chihaya Sugimoto

Yoshihiro Fujiyoshi

Masaru Asari

Ikuro Hara

Masami Fukuzawa

Hiroyuki Mamiya

Shinichi Nishida

Masayuki Kobayashi

Yutaka Yoshida

A valve train of an internal combustion engine has rocker arms which are spherically supported on lash adjusters and camshafts disposed above the rocker arms. The camshafts are rotatably supported on a cam holder including a lower cam holder which is fastened to a cylinder head and an upper cam holder. Projections for preventing the fall of the rocker arms in axial directions of the camshafts through the contact with the rocker arms are provided on bearing portions and partitioning portions which are integrally formed on the lower cam holder in such a manner as to face both sides in the axial direction of the rocker arms.

Internal combustion engine with valve train

A unit injector mounted to a cylinder head in a diesel engine includes a pump section and a nozzle section which are eccentrically connected to each other through a connecting portion. An axis of the nozzle section is disposed in alignment with an axis of a cylinder, and an axis is of the nozzle section disposed on the opposite side of a pair of intake valves from the axis of the nozzle section. A rocker arm for transmitting the rotation of an exhaust cam shaft to the pump section is pivotally carried at its intermediate portion on a rocker shaft supported above the nozzle section. Thus, it is possible to provide a reduction in size of the cylinder head, while maintaining the spray of a fuel into a cylinder uniform, by an improved layout of the unit injector in the cylinder head.

Fuel injection system for diesel engine

An SOHC-type valve operating system in an internal combustion engine having a single cam shaft commonly provided for a pair of intake valves and a pair of exhaust valves. A plurality of intake valve driving members are rockably disposed between the cam shaft and the pair of intake valves and have an operative-connection switchover mechanism for switching over the connection and disconnection of the intake valve driving members. A pair of exhaust valve driving members are rockably disposed between the cam shaft and the pair of exhaust valves and independently operate each of the exhaust valves. The operative-connection switchover mechanism includes a switchover pin movable between a position for operatively connecting adjacent intake valve driving members and a position for releasing such connection, which pin is slidably mounted in a cylindrical sleeve secured to the intake valve driving members for guiding the movement of the switchover pin. The cylindrical sleeve also rotatably supports a cylindrical rotor in rolling contact with a cam provided on the cam shaft. The operative-connection switchover mechanism is disposed on the opposite side of the intake valves with respect to the rocking axis of the intake valve driving member whereby space for disposing a component such as an ignition plug is available on the intake side of the engine.

SOHC-type valve operating system in internal combustion engine

Growing community of inventors

Saitama, Japan

Hidemi Arai