JPS5846849U

JPS5846849U - Two-stroke internal combustion engine with check valve

Info

Publication number: JPS5846849U
Application number: JP14269081U
Authority: JP
Inventors: 立川　章次
Original assignee: 本田技研工業株式会社
Priority date: 1981-09-28
Filing date: 1981-09-28
Publication date: 1983-03-29

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 drawings]

第１図は本案に係る逆止弁付二サイクル内燃機関の一実
施例を図示した縦断側面図、第２図はその要部側面図、
第３図は第２図の■−■線に沿って截断した縦断平面図
、第４図は第１図のＩＶ−ＩＶ矢視親図第５図ないし第
７図は、それぞれ始動時、再始動時、通常運転時におけ
る始動切換弁装置の作動状態を図示した縦断面図、第８
図ないし第１０図は他の実施例における第５図ないし第
７図と同様な縦断面図、第１１図はさらに他の実施例の
縦断面図、第１２図は第１１図の刈−刈線に沿って截断
した横断面図、第１３図および第１４図は再始動時およ
び通常運転時における横断面図゛である。１・・・ニサイクル内燃機関、２・・・ピストン、３・
・・シリンダ、４・・・主吸気通路、５・・・主吸気口
、６・・・始動用副吸気連通路、７・・・始動用副吸気
口、８・・・クランク室、９・・・掃気口、１０・・・
排気通路、１１・・・排気口、１２・・・リード弁、１
３・・・気化器、１４・・・絞り弁、１５・・・開口、
１６・・・始動切換弁装置、１７・・・シリンダ室、１
８・・・弁体、１９・・・操作機構、２０・・・パイス
タータジェット、２１・・・連通孔、２２・・・接続孔
、２３・・・絞り孔。FIG. 1 is a longitudinal sectional side view illustrating an embodiment of a two-stroke internal combustion engine with a check valve according to the present invention, and FIG. 2 is a side view of the main parts thereof.
Fig. 3 is a longitudinal cross-sectional plan view taken along line Vertical sectional view illustrating the operating state of the starting switching valve device during starting and normal operation, No. 8
10 are longitudinal sectional views similar to FIGS. 5 to 7 in other embodiments, FIG. 11 is a longitudinal sectional view of still another embodiment, and FIG. 13 and 14 are cross-sectional views taken along the line, and are cross-sectional views at the time of restart and during normal operation. 1... Two-cycle internal combustion engine, 2... Piston, 3...
... Cylinder, 4... Main intake passage, 5... Main intake port, 6... Sub-intake communication passage for starting, 7... Sub-intake port for starting, 8... Crank chamber, 9...・Scavenging port, 10...
Exhaust passage, 11...Exhaust port, 12...Reed valve, 1
3... Carburetor, 14... Throttle valve, 15... Opening,
16... Start switching valve device, 17... Cylinder chamber, 1
8... Valve body, 19... Operation mechanism, 20... Pie starter jet, 21... Communication hole, 22... Connection hole, 23... Throttle hole.

Claims

[Claims for Utility Model Registration] 1. A sub-intake hole for starting is provided in the inner wall of the cylinder independently of the main intake hole bored in the inner wall of the cylinder, and the sub-intake hole for starting is connected to the upstream side of the main intake hole. 1. A two-stroke engine with a check valve, characterized in that when a communication passage is provided that communicates with an opening upstream of a throttle valve of the engine, a passage cross-sectional area switching device is provided in the communication passage. 2. The two-stroke internal combustion engine with a check valve according to claim 1 of the utility model registration, characterized in that the opening position of the sub-intake hole for starting is provided above the opening position of the main intake hole.