Kubota Corporation

Takeshi Kawasaki

Hiroaki Isoshima

Yuichiro Yamada

Hiroshi Inoue

Yutaka Teruumi

Shinji Kishi

Yutaka Noyori

Seiji Izuhara

Tetsushi Karasawa

Koji Fujimura

The ventilator-equipped engine is configured to: guide a blow-by gas generated in a crankcase to an intake passage through an inside of a cylinder head, an inside of a head cover, and a pressure regulating valve; and to directly introduce fresh air into an internal space of the cylinder head by providing a fresh air introduction passage that extends across the intake passage and the cylinder head.

Ventilator-equipped engine

A cylindrical part capable of supporting an ignition-coil-integrated plug cap is formed on a head cover so as to correspond to a plug hole of a cylinder head. The cylindrical part is formed by fitting and fixing a pipe material to a mounting hole part formed in the head cover, the mounting hole part facing the plug hole.

Spark ignition engine

An exhaust manifold is covered by a manifold heat shield cover and an exhaust pipe is directed downward from the exhaust manifold. In such an engine, a cooling fan is disposed on a front portion of the engine and the exhaust pipe is positioned on the air flow path of the cooling fan. An auxiliary component heat shielding plate is directed from the manifold heat shield cover along a back side of the exhaust pipe. An auxiliary engine component is disposed beneath the manifold heat shield cover on a back side of the auxiliary component heat shielding plate. Between the exhaust pipe and a cylinder block, an air flow guide plate provides an air flow space between the air flow guide plate and the cylinder block. A cooling air flow passing through the air flow space is thus supplied to the auxiliary engine component.

Engine

The present invention concerns a multi-cylinder engine comprising a throttle body () in which a throttle intake-air passage () is provided. A throttle valve () is arranged in this throttle intake-air passage (). Attached to the throttle body () is an injector (), a leading end portion () of which is arranged opposite to an interior area of the throttle intake-air passage () downstream of the throttle valve () and is opened to provided a liquid-fuel injection hole (). An intake-air pressure sensor () is attached to the throttle body () together with the injector () and an intake-air pressure introduction passage () has an inlet () provided by opening an inner peripheral surface of the throttle intake-air passage () upstream of the injector ().

Growing community of inventors

Sakai, Japan

Takeshi Kawasaki