JPH0427169U

JPH0427169U -

Info

Publication number: JPH0427169U
Application number: JP6777090U
Authority: JP
Priority date: 1990-06-26
Filing date: 1990-06-26
Publication date: 1992-03-04

Description

[Brief explanation of drawings]

第１図は本考案を適用したエンジンの要部断面
図、第２図は同本考案の要部を示す拡大断面図、
第３図は電気回路系を示す概要図、第４図は本考
案の作動時の状態を示す拡大断面図、第５図は従
来のエンジン始動装置の一例を示す正面図、第６
図は同側面図、第７図は同要部斜視図、第８図は
同作動時の状態を示す正面図、第９図は同側面図
である。１１……シリンダ、１１ａ……弁座、１３……
ピストン、１５……コンロツド、１７……クラン
クケース、１９……シリンダヘツド、２１……燃
焼室、２３……吸気管、２５……吸気弁、２７…
…排気管、２９……排気弁、３１，３３……バル
ブスプリング、３５，３７……タペツト、４０…
…排気機構、４１……通路（小径）、４３……通
路（大径）、４５……段部、４７……リリース穴
、４９……マグネツトスイツチ（アクチユエータ
）、５１……作動ロツド、５１ａ……バルブ部、
６１……イグニツシヨンスイツチ。 Figure 1 is a sectional view of the main parts of an engine to which the present invention is applied, and Figure 2 is an enlarged sectional view showing the main parts of the invention.
FIG. 3 is a schematic diagram showing the electric circuit system, FIG. 4 is an enlarged sectional view showing the operating state of the present invention, FIG. 5 is a front view showing an example of a conventional engine starting device, and FIG.
7 is a perspective view of the same essential parts, FIG. 8 is a front view showing the same operating state, and FIG. 9 is a side view of the same. 11...Cylinder, 11a...Valve seat, 13...
Piston, 15...Conrod, 17...Crankcase, 19...Cylinder head, 21...Combustion chamber, 23...Intake pipe, 25...Intake valve, 27...
...Exhaust pipe, 29...Exhaust valve, 31, 33...Valve spring, 35, 37...Tappet, 40...
... Exhaust mechanism, 41 ... Passage (small diameter), 43 ... Passage (large diameter), 45 ... Stepped portion, 47 ... Release hole, 49 ... Magnetic switch (actuator), 51 ... Actuation rod, 51a ...Valve section,
61...Ignition switch.

Claims

[Claims for Utility Model Registration] (1) A piston inserted into a cylinder, a cylinder head having an air-fuel mixture intake valve and an exhaust valve and forming a combustion chamber between the cylinder head and the piston; In an engine equipped with a valve opening/closing mechanism that opens and closes intake valves and exhaust valves at predetermined timing, a valve opening/closing mechanism is installed at a side portion facing the combustion chamber formed between the cylinder head and the piston when the engine is started. An engine starting device characterized by being provided with an exhaust mechanism that works in conjunction with an ignition switch to discharge a portion of the compressed air-fuel mixture in the combustion chamber to the atmosphere. (2) The above-mentioned exhaust mechanism consists of a small diameter passage formed laterally from a position facing the combustion chamber, a large diameter passage connected to the small diameter passage by a stepped portion, and this large diameter passage. a release hole opened in the inner wall surface of the
an actuator facing the large-diameter passage and located in a direction opposite to the combustion chamber;
an actuation rod extending from the actuator to the combustion chamber and having a valve portion formed at its tip;
A release valve is fitted in the large diameter passage so as to be slidable relative to the actuating rod, and the release valve is pressed against the stepped portion and the air-fuel mixture in the combustion chamber is compressed when the engine is started. 2. The engine starting device according to claim 1, further comprising a release spring provided with a preset elastic force for lowering the ratio below a certain value.