JPH01134734U

JPH01134734U -

Info

Publication number: JPH01134734U
Application number: JP3142888U
Authority: JP
Priority date: 1988-03-09
Filing date: 1988-03-09
Publication date: 1989-09-14

Description

[Brief explanation of drawings]

第１図は本考案の一実施例を示す４サイクルデ
イーゼルエンジンの吸、排気系の概略構成図、第
２図は第２吸気弁の開閉タイミングを示す図であ
る。１……シリンダ、４……吸気路、５……吸気弁
、６……排気路、７……排気弁、１０……第２吸
気路、１３……第２吸気弁。 FIG. 1 is a schematic diagram of the intake and exhaust system of a four-stroke diesel engine showing an embodiment of the present invention, and FIG. 2 is a diagram showing the opening/closing timing of a second intake valve. 1... Cylinder, 4... Intake path, 5... Intake valve, 6... Exhaust path, 7... Exhaust valve, 10... Second intake path, 13... Second intake valve.

Claims

[Scope of utility model registration request]

It consists of four strokes: intake, compression, explosion, and exhaust. During the intake stroke, the intake valve is opened to draw air into the cylinder from the intake path, and during the exhaust stroke, the exhaust valve is opened and the exhaust gas in the cylinder is scavenged into the exhaust path. In the four-stroke diesel engine, a second intake passage connecting the intake passage and the cylinder is provided between the intake passage and the cylinder, and a second intake passage is provided between the second intake passage and the cylinder. A four-cycle cycle characterized in that a second intake valve is provided for intruding and blocking intake air from the passageway into the cylinder, and the second intake valve is opened from immediately before the end of the exhaust process until the exhaust valve is closed. diesel engine.