JPS59107936U

JPS59107936U - Diesel engine starting accelerator

Info

Publication number: JPS59107936U
Application number: JP316583U
Authority: JP
Inventors: 耕一畑村; 河口　寿博; 一博原賀; 哲郎北村
Original assignee: マツダ株式会社
Priority date: 1983-01-12
Filing date: 1983-01-12
Publication date: 1984-07-20

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は本考案装置の第１実施例を示す断面図、第２図
は開閉弁停止機構の拡大断面図、第３図は吸、排気弁お
よび開閉弁の作動タイミングを示す説明図、第４図は本
考案装置の第２実施例を示す断面図、第５図はその要部
拡大断面図、第６図はこの実施例における吸気負圧と開
閉弁開度との関係を示す説明図である。１・・・シリンダ、３・・・燃焼室、４・・・吸気通路
、４ａ・・・主吸気通路、４ｂ・・・バイパス通路、１
０・・・絞り弁、２０．５０・・・開閉弁。第２図第１図FIG. 1 is a sectional view showing the first embodiment of the device of the present invention, FIG. 2 is an enlarged sectional view of the on-off valve stop mechanism, FIG. 3 is an explanatory diagram showing the operation timing of the intake and exhaust valves and the on-off valve, and FIG. Fig. 4 is a sectional view showing a second embodiment of the device of the present invention, Fig. 5 is an enlarged sectional view of the main part thereof, and Fig. 6 is an explanatory diagram showing the relationship between intake negative pressure and opening/closing valve opening degree in this embodiment. It is. DESCRIPTION OF SYMBOLS 1... Cylinder, 3... Combustion chamber, 4... Intake passage, 4a... Main intake passage, 4b... Bypass passage, 1
0...throttle valve, 20.50...open/close valve. Figure 2 Figure 1

Claims

[Scope of Claim for Utility Model Registration] 1. A throttle valve is provided in the intake passage of a diesel engine to throttle the intake passage during low-load operating conditions from startup to warm-up, and from the end of the intake stroke during this operating condition. A starting promotion device for a diesel engine, comprising an intake air introduction device that opens an intake passage upstream of a throttle valve to a combustion chamber during an early stage of a compression stroke. 2. The intake air introduction device includes a skin bypass passage that connects upstream and downstream of the throttle valve in the intake passage, an on-off valve that closes the bypass passage, and an on-off valve that closes the bypass passage from the end of the intake stroke to the compression stroke. 2. The diesel engine starting promotion device according to claim 1, comprising a valve train that is opened during an initial period. 3. The intake air introduction device includes a bypass passage that connects upstream and downstream of the throttle valve in the intake passage, an on-off valve that is provided in the bypass passage and closes the bypass passage, and a valve that closes the bypass passage when the throttle valve is closed. and a pressure-responsive actuator that opens the on-off valve in response to a decrease in the pressure in the intake passage downstream of the throttle valve at the end of the suction stroke, as claimed in claim 1 of the utility model registration. diesel engine starting accelerator.