Yanmar Co., Ltd.

Yasuhiro Ozaki

Takeshi Fujii

Hideo Shiomi

Hiroyasu Nishikawa

Satoshi Iwata

Michio Sakata

Kaichi Takeuchi

In an engine such as an engine for driving a pump or dynamo, in which a load increasing state does not appear as an accelerating state of rotation speed, it is intended to prevent the smoke emission in an abruptly load-increasing state, which might otherwise be caused by the suppression or interruption of an EGR quantity. The enginecomprises a superchargerand an exhaust gas recirculation (EGR) device. The enginemakes an isochronous control or a droop control, when its rotation speed N is shifted from a no-load (idle) or light-load run to a high-load (load-increasing) state. In case it is detected, when the state of the engineshifts to a load state, that the actual rotation speed N becomes lower by a predetermined rotation speed &#x394;N than a target rotation speed Nm, an EGR valveof the exhaust gas recirculation (EGR) deviceis either throttled to an opening smaller by a predetermined opening &#x394;F than the ordinary set opening F corresponding to the load state or fully closed.

Engine

A breather device comprises a breather chamber () provided in a valve arm chamber () arranged above a cylinder head of an engine. In the breather chamber, blow-by gas including oil mist is separated into oil component and gas component, and the oil mist is removed from the blow-by gas. The interior of the breather chamber is alternately divided into plural horizontally juxtaposed rooms () by a partition () extended from a bottom surface of the breather chamber and a partition () extended from a ceiling surface of the breather chamber. Plural oil trap members () for trapping oil mist in the blow-by gas are arranged in the breather chamber. Especially, the oil trap member arranged at a blow-by gas inlet of the breather chamber is held by a holder () made separately from members () forming the valve arm chamber ().

Breather device of engine

Growing community of inventors

Osaka, Japan

Yasuhiro Ozaki