JPS5823246A - Starting pressure reduction device of internal combustion engine - Google Patents
Starting pressure reduction device of internal combustion engineInfo
- Publication number
- JPS5823246A JPS5823246A JP12126081A JP12126081A JPS5823246A JP S5823246 A JPS5823246 A JP S5823246A JP 12126081 A JP12126081 A JP 12126081A JP 12126081 A JP12126081 A JP 12126081A JP S5823246 A JPS5823246 A JP S5823246A
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- valve
- internal combustion
- pressure reducing
- combustion engine
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
- F01L13/08—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for decompression, e.g. during starting; for changing compression ratio
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は内燃機関の始動時減圧装置に関し、詳しくは、
機関の回転により流体を吐出する流体ポンプを備えると
ともに、シリングボデーに設けられてシリンダ内孔の内
外を連通書せる通路にシリンダ内孔の内外の連通を断続
する減圧弁を備え、機関の始動開始時にシリンダ内孔の
圧縮圧を減圧させるようにした内燃機関の始動時減圧装
置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a starting pressure reducing device for an internal combustion engine.
It is equipped with a fluid pump that discharges fluid as the engine rotates, and a pressure reducing valve that connects and disconnects communication between the inside and outside of the cylinder bore in a passage provided in the cylinder body that allows communication between the inside and outside of the cylinder bore. The present invention relates to a pressure reducing device for starting an internal combustion engine, which reduces the compression pressure in a cylinder inner hole at certain times.
一般に、始動時減圧装置は内燃機関を始動させる際、シ
リンダ内孔の圧縮圧を減圧してセルフスタータのスター
タモーフの負荷を軽減し、或いはキックスタータ、リコ
イルスタータへの操作力を軽減すべく機能する。また、
かかる始動時減圧装置の一形式として、シリンダ内孔の
内外を連通させる通路内に組付けた減圧弁と、この減圧
弁を開閉操作する操作機構とにより構成された形式のも
のがあり、この形式の始動時減圧装置は、内燃機関の始
動時に手動操作で減圧弁を開く手動式と、内燃機関の始
動時に減圧弁が自動的に開かれる自動式とに大別される
。これらのうち、手動式の始動時減圧装置はその作動操
作が煩雑であり、また内燃機関始動後の作動解除操作を
忘れることがあるため、自動式の始動時減圧装置が望ま
しい。Generally, when starting an internal combustion engine, a starting pressure reducing device functions to reduce the compression pressure in the cylinder inner hole to reduce the load on the starter morph of a self-starter, or to reduce the operating force on the kick starter or recoil starter. do. Also,
One type of such a start-up pressure reducing device is one that consists of a pressure reducing valve assembled in a passage that communicates the inside and outside of the cylinder bore, and an operating mechanism that opens and closes this pressure reducing valve. The starting pressure reducing device is roughly divided into a manual type in which the pressure reducing valve is manually opened when the internal combustion engine is started, and an automatic type in which the pressure reducing valve is automatically opened when the internal combustion engine is started. Among these, an automatic starting pressure reducing device is preferable because the manual starting pressure reducing device is complicated to operate, and it is sometimes easy to forget to release the operation after starting the internal combustion engine.
しかしながら、すでに提案されている自動式の始動時減
圧装置は、減圧弁の開閉を内燃機関の吸気負圧または排
気圧を利用して行っているものが多いが、これらは脈動
等により機関の回転とは無関係に変動することがあるた
め、不要時に減圧弁が開いたりして、確実な開閉動作を
期待しえないおそれがある。However, many of the automatic start-up pressure reducing devices that have already been proposed use the intake negative pressure or exhaust pressure of the internal combustion engine to open and close the pressure reducing valve, but these do not allow the engine to rotate due to pulsation, etc. Since the pressure reduction valve may fluctuate unrelated to the above, there is a risk that the pressure reducing valve may open when it is not needed and reliable opening/closing operation cannot be expected.
本発明は、内燃機関の駆動により循環する流体、例えば
潤滑油、冷却水等の流体圧が機関の回転にほぼ比例する
ことに着目し、これらを利用して減圧弁の開閉動作を確
実に行わせることを目的とするもので、以下本発明を図
面に基づいて説明する。The present invention focuses on the fact that the fluid pressure of fluids such as lubricating oil and cooling water that are circulated by the drive of an internal combustion engine is approximately proportional to the rotation of the engine, and utilizes this to reliably open and close the pressure reducing valve. The present invention will be explained below based on the drawings.
第１図は、本発明の一実施例に係る始動時減圧装Ｎをｍ
（＝Ｉけｔこ４サイクルエンジンを示している。FIG. 1 shows a starting pressure reducing device N according to an embodiment of the present invention.
(=Indicates a four-stroke engine.
この４サイクルエンジンにおいては、シリンタボデー１
１の一側に、シリンダ内孔１１）ｌおよび外部に開口す
る取付孔１１１）と、取付孔１１１）の−に１部略中央
およびシリンダヘッド１２の排気ポーＩ・１２ａにおけ
る排気弁１３より下流側部位に開口する通孔１１０とが
形成されている。この取付孔１１１）の内端開口部は、
シリンダ内孔］、１ａにおけるシリンダヘッド１２取付
面とピストン２１の下死点間の略中央部位に位置してお
り、取付孔１１１）の外側から本発明に係る始動時減圧
装置３０が嵌着されて組付けられている。In this 4-stroke engine, cylinder body 1
On one side of the cylinder head 12, there is a mounting hole 111) that opens to the cylinder inner hole 11)l and the outside, and a part downstream of the exhaust valve 13 at the approximately center of the mounting hole 111) and at the exhaust port I/12a of the cylinder head 12. A through hole 110 that opens at the side portion is formed. The inner end opening of this mounting hole 111) is
The cylinder inner hole] is located approximately in the center between the cylinder head 12 mounting surface and the bottom dead center of the piston 21 in 1a, and the startup pressure reducing device 30 according to the present invention is fitted from the outside of the mounting hole 111). It is assembled.
しかして、始動時減圧装置３０は減圧弁３０ａと圧力応
動弁３０１］とを一体的に形成してなるもので、圧力応
動弁３０１＋はハウジング３１、作動ピストン３２、［
１および作動ピストン３２をシリンダ内（孔１１．ｆｌ
側へ伺勢する圧縮スプリング３４を主要構成部材として
いる。ハウジング３１は、作動ピストン３２のピストン
部３２１）が液密的かつ摺動可能に嵌挿されるシリンダ
部８１．８と、後述する減圧弁３ｄ恍ツド部３２ａが液
密的かつ摺動可能に嵌挿される小径筒部３１１）とによ
り構成されている。この小径筒部３１１〕の上部には、
通孔１１Ｇと小径筒部３１１〕内とを連通させる連通孔
３１ｄが形成されている。Therefore, the pressure reducing device 30 at startup is formed by integrally forming the pressure reducing valve 30a and the pressure responsive valve 301], and the pressure responsive valve 301+ includes the housing 31, the operating piston 32, and the pressure responsive valve 301+.
1 and the operating piston 32 in the cylinder (hole 11.fl
The main component is a compression spring 34 that biases toward the side. The housing 31 has a cylinder portion 81.8 into which the piston portion 321 of the actuating piston 32 is fluid-tightly and slidably fitted, and a pressure reducing valve 3d compatible portion 32a (to be described later) is fluid-tightly and slidably fitted into the cylinder portion 81.8. The small diameter cylindrical portion 311) is inserted into the small diameter cylindrical portion 311). In the upper part of this small diameter cylindrical part 311],
A communication hole 31d is formed to communicate between the communication hole 11G and the inside of the small diameter cylindrical portion 311.
なお、減圧弁３（ＩＩは作動ピストン３２に固着しｔこ
ロッド部３２ａ１ ロット部３２ａに一体的に形成しｔ
こロッド状弁体３３および小径筒部３１１〕の内端開口
部に形成した弁座３１（８を主要構成部材としている。Note that the pressure reducing valve 3 (II) is fixed to the actuating piston 32 and is integrally formed in the rod portion 32a1 and the rod portion 32a.
The main component is a valve seat 31 (8) formed at the inner end opening of the rod-shaped valve body 33 and the small diameter cylindrical portion 311.
一方、ハウジング３１のシリンダ部り１ａ内は作動ピス
トン３２のビストノ部３２１）により、圧縮スプリング
３４が収容される収容室助と潤滑油が供給される油圧室
ＩＬ２とに区画されている。この圧縮スプリング３４は
、ハウジング３１の外側壁と作動ピストン３２のピスト
ン部３２１）間に介装されていて、作動ビスＩ・ノ３２
を介してロット状弁体３３を開方向すなわち弁座３１
Ｃから離間すべく付勢している。また、油圧室■２はエ
ンジンの回転により駆動して潤滑ル１１を吐出するオイ
ルポンプ２２に連通し、オイルポンプ２２により循環さ
れる潤滑油の一部が供給されるもので、オイルポンプ２
２の駆動により油圧室Ｒ１２に潤滑油が供給されると、
作動ビス！・ン３２が圧縮スプリング３４に抗して摺動
し、ロッド状弁体３３を弁座３１（Ｌに着座させてシリ
ンダ内孔１１ａと排気ポー１−１２ａとの連通を遮断す
る。なお、圧縮スプリング３４のバネ力は、油圧室■２
にアイドリング時に循環する潤滑油が有する程度の流体
圧が加わった際変形を始める程度に設定されている。On the other hand, the inside of the cylinder portion 1a of the housing 31 is divided by the biston portion 321) of the actuating piston 32 into an accommodating chamber in which the compression spring 34 is accommodated and a hydraulic chamber IL2 to which lubricating oil is supplied. This compression spring 34 is interposed between the outer wall of the housing 31 and the piston portion 321 of the actuating piston 32, and is
through the rod-shaped valve body 33 in the opening direction, that is, the valve seat 31
It is biased to move away from C. Further, the hydraulic chamber 2 communicates with an oil pump 22 that is driven by the rotation of the engine and discharges the lubricant 11, and is supplied with a part of the lubricating oil circulated by the oil pump 22.
When lubricating oil is supplied to the hydraulic chamber R12 by the drive of 2,
Operating screw! - The cylinder 32 slides against the compression spring 34, and the rod-shaped valve body 33 is seated on the valve seat 31 (L) to cut off communication between the cylinder inner hole 11a and the exhaust port 1-12a. The spring force of the spring 34 is the hydraulic chamber ■2
It is set to such an extent that it begins to deform when a fluid pressure of the level of lubricating oil circulating during idling is applied to the engine.
このように構成した始動時減圧装置３０においては、エ
ンジンの停止時オイルポンプ２２は停止していて、ハウ
ジング３１の油圧室Ｒ２へは潤滑油が供給されない。こ
のため、作動ピストン３２は第１図に示すように、圧縮
スプリング３４の付勢力にて減圧弁３０ａの開方向すな
わちシリンダ内孔１１２【側へ摺動していて、ロッド状
弁体３３を弁座３１Ｃから離間させてシリンダ内孔１１
ａと排気ポー１−１２ａとを連通させている。In the starting pressure reducing device 30 configured in this manner, the oil pump 22 is stopped when the engine is stopped, and lubricating oil is not supplied to the hydraulic chamber R2 of the housing 31. Therefore, as shown in FIG. 1, the actuating piston 32 is sliding in the opening direction of the pressure reducing valve 30a, that is, toward the cylinder inner hole 112, by the biasing force of the compression spring 34, and the rod-shaped valve body 33 is slid toward the valve body 112. The cylinder inner hole 11 is spaced apart from the seat 31C.
a and the exhaust port 1-12a are communicated with each other.
この状態で、エンジンを始動すべく図示しないスタータ
を操作して図示しないクランクシャフトを回転させると
、シリンダ内孔１１．ａの圧縮圧が減圧された状態にて
クランクシャフトの回転数が上昇して、エンジンが始動
される。これにより、オイルポンプ２２が駆動して潤滑
油をエンジンの各部へ供給するとともに、潤滑油の一部
をハウジング３１の油圧室■２へ供給し、エンジンの７
回転がアイドリング回転数程度になると、作動ピストン
３２は圧縮スプリング３４に抗して摺動し、ロツド状弁
体３３を弁座３１０へ着座させてシリンダ内孔１ ］、
ａと排気ボート１２）Ｌとの連通を遮断する。まｊこ、
エンジンを停止」二すると、これにより油圧室Ｒ，２へ
の潤滑油の供給が停止されるため、作動ビス！・ン３２
は圧縮スプリング３４の付勢力にて摺動じ、ロッド状弁
体３３を弁座３１．Ｃから離間させてシリンダ内孔１１
ン１と排気ボー１−１２ａとを再び連通させる。In this state, when a starter (not shown) is operated to rotate a crankshaft (not shown) to start the engine, the cylinder inner hole 11. With the compression pressure of a being reduced, the rotational speed of the crankshaft increases and the engine is started. As a result, the oil pump 22 is driven to supply lubricating oil to each part of the engine, and a portion of the lubricating oil is also supplied to the hydraulic chamber 2 of the housing 31.
When the rotation reaches the idling speed, the actuating piston 32 slides against the compression spring 34, seating the rod-shaped valve body 33 on the valve seat 310 and opening the cylinder inner hole 1.
a and the exhaust boat 12)L is cut off. Majko,
When the engine is stopped, the supply of lubricating oil to the hydraulic chambers R and 2 is stopped.・N32
is slid by the biasing force of the compression spring 34, and the rod-shaped valve body 33 is moved against the valve seat 31. The cylinder inner hole 11 is spaced apart from C.
1 and the exhaust bow 1-12a are brought into communication again.
第２図は、本発明の他の実施例に係る始動時減圧装置を
組付けた４サイクルエンンンを示している。この４サイ
クルエンジンにおいては、シリンダボテ−１１の２つの
シリンダ内孔］−１ａに対応］ッて組付けた２つの減圧
弁４Ｑ＋ｉ 、 ４０ＦＬを１つの圧力応動弁４０１）
で操作する始動時減圧装置／ｌ−０が採用されている。FIG. 2 shows a four-cycle engine equipped with a starting pressure reducing device according to another embodiment of the present invention. In this 4-cycle engine, two pressure-reducing valves 4Q+i and 40FL, which correspond to the two cylinder inner holes [-1a] of the cylinder body 11, are combined into one pressure-responsive valve 401).
A starting pressure reducing device/l-0 operated by the engine is adopted.
− この始動時減圧装置４０は、各減圧弁４０２Ｉと圧
力応動弁４０１）とが別体に構成されていて、各減圧弁
４０ａと圧力応動弁４０１＋とは連結機構４０（−を介
して連結されている。各減圧弁４０＋Ｌは、シリンダボ
デー１１の取イ」孔１１１）に嵌着固定された筒状の弁
ハウジング４１と、弁ハウジング４１内に摺動可能に嵌
挿されたロッド状弁体４２とにより構成されている。ロ
ッド状弁体４２は、弁ハウジング４１の内端開口部に設
けた弁座４．１ ａに着座可能に形成されていて、シリ
ンダ内孔１１ａと図示しない排気ボートとの連通を断続
すべく機能する。また、圧力応動弁４０１）はシリンダ
ハウジング４３と、シリンダハウシング４３内に液密的
かっ摺動可能に嵌挿された作動ピストン４４と、作動ピ
ストン４４を図示下方へ付勢する圧縮スプリング４５と
により構成されている。シリンダハウジング４３内は作
動ピストン４４のピストン部４４１〕により、圧縮スプ
リング４５が収容される収容室Ｒ１と潤滑油が供給され
る油圧室孔２とに区画されている。この圧縮スプリング
４５は、シリンダハウジング４３の」二側壁と作動ピス
トン４４のピストン部４４１）間に介装されていて、作
動ピストン４４を図示下方へ付勢している。なお、圧縮
スプリング４５のバネ力は第１実施例と同様に設定され
ている。また、油圧室１ｔ、２には、エンジンにより駆
動する図示しないオイルポンプにより循環される潤滑油
の一部が供給されるもので、潤滑油が油圧室１？、２に
供給されると作動ビスＩ−ン４４が圧縮スプリング４５
に抗して図示−ヒ方へ摺動する。- In this start-up pressure reducing device 40, each pressure reducing valve 402I and a pressure responsive valve 401) are configured separately, and each pressure reducing valve 40a and pressure responsive valve 401+ are connected via a connecting mechanism 40 (-). Each pressure reducing valve 40+L includes a cylindrical valve housing 41 that is fitted and fixed in a recess hole 111) of the cylinder body 11, and a rod-shaped valve body that is slidably inserted into the valve housing 41. 42. The rod-shaped valve body 42 is formed to be able to sit on a valve seat 4.1a provided at the inner end opening of the valve housing 41, and functions to disconnect and disconnect communication between the cylinder inner hole 11a and an exhaust boat (not shown). do. The pressure-responsive valve 401) is constructed of a cylinder housing 43, an operating piston 44 that is slidably fitted in a liquid-tight manner into the cylinder housing 43, and a compression spring 45 that urges the operating piston 44 downward in the drawing. It is configured. The interior of the cylinder housing 43 is divided by a piston portion 441 of the actuating piston 44 into a storage chamber R1 in which a compression spring 45 is accommodated and a hydraulic chamber hole 2 to which lubricating oil is supplied. The compression spring 45 is interposed between the two side walls of the cylinder housing 43 and the piston portion 441 of the working piston 44, and urges the working piston 44 downward in the drawing. Note that the spring force of the compression spring 45 is set similarly to the first embodiment. Further, a part of lubricating oil circulated by an oil pump (not shown) driven by an engine is supplied to the hydraulic chambers 1t and 2, and the lubricating oil is supplied to the hydraulic chambers 1t and 2. , 2, the actuating screw 44 compresses the compression spring 45.
It slides against the direction shown in the figure.
一方、連結機構４０Ｇは両弁ハウジング４１の外端に数
句けられた支持枠体４６と、基端を支持枠体４６に回動
可能に数句けられた一対の揺動アーム４７と、両揺動ア
ーム４７の揺動端と作動ピストン４４のロッド部４４ａ
に連結されたワイヤ４８とによって構成されている。両
揺動アーム４７の揺動端は、ワイヤ４８の先端に固定し
た取付ビン４８ａにて互に回動可能に取付けられており
、また基端近傍にて各ロッド状弁体４２の外端に連結さ
れている。両揺動アーム４７は、圧縮スプリング４５ｃ
７）付勢力にて作動ビス１〜ン４４およびワイヤ４８を
介してシリンダボデー１１側へ揺動されて両ロッド状弁
体４２をシリンダ内孔１１ａ側へ摺動させている。これ
により、各ロッド状弁体４２は弁ハウジング４１の弁座
４１ａから離間して、シリンダ内孔１１＋１と排気ボー
１〜とを連通させている。On the other hand, the connecting mechanism 40G includes a support frame 46 that is provided at the outer ends of both valve housings 41, a pair of swinging arms 47 that are provided with base ends rotatably attached to the support frame 46, The swinging ends of both swinging arms 47 and the rod portion 44a of the operating piston 44
The wire 48 is connected to the wire 48. The swinging ends of both swinging arms 47 are rotatably attached to each other by a mounting pin 48a fixed to the tip of a wire 48, and are attached to the outer end of each rod-shaped valve body 42 near the base end. connected. Both swing arms 47 are compressed by compression springs 45c.
7) The rod-shaped valve body 42 is swung toward the cylinder body 11 side by the biasing force via the actuating screws 1 to 44 and the wire 48, thereby causing both rod-shaped valve bodies 42 to slide toward the cylinder inner hole 11a side. Thereby, each rod-shaped valve body 42 is spaced apart from the valve seat 41a of the valve housing 41, and communicates the cylinder inner hole 11+1 with the exhaust bow 1.
また、エンジンが始動して図示しないオイルポンプが駆
動すると、潤滑油の一部が油圧室Ｒ２に供給されて作動
ピストン４４が圧縮スプリング４５に抗して摺動し、ワ
イヤ４８を介して両揺動アーム４７を外方へ揺動させる
。この結果、両ロッド状弁体４２は外方へ摺動して各弁
座４．１ ａに着座し、シリンダ内孔１．１ａと排気ボ
ートとの連通を遮断する。従って、この第２実施例にお
いても第１実施例と同様に作用するとともに、１つの圧
力応動弁４０１〕により同時に２つの減圧弁４０ａを操
作できる利点がある。When the engine is started and an oil pump (not shown) is driven, a portion of the lubricating oil is supplied to the hydraulic chamber R2, and the actuating piston 44 slides against the compression spring 45. The movable arm 47 is swung outward. As a result, both rod-shaped valve bodies 42 slide outward and sit on their respective valve seats 4.1a, blocking communication between the cylinder bore 1.1a and the exhaust boat. Therefore, this second embodiment operates in the same manner as the first embodiment, and has the advantage that one pressure-responsive valve 401 can simultaneously operate two pressure-reducing valves 40a.
なお、」−記各実施例においては、流体ポンプとしてオ
イルポンプを利用し潤滑油の油圧により減圧弁を作動さ
せてシリンダ内孔の内外の連通を遮断する例について示
したが、このオイルポンプに換えてウォータポンプを利
用しエンジン冷却水の水圧により減圧弁を作動させ、シ
リンダ内孔の内外の連通を遮断するようにしてもよい。In addition, in each of the embodiments described above, an example was shown in which an oil pump is used as the fluid pump and the pressure reducing valve is actuated by the oil pressure of the lubricating oil to cut off communication between the inside and outside of the cylinder inner hole. Alternatively, a water pump may be used to operate a pressure reducing valve by the water pressure of engine cooling water, thereby blocking communication between the inside and outside of the cylinder inner hole.
以−１−説明したように、本発明においては、始動時減
圧装置を構成する減圧弁を流体ポンプに連通ずる圧力応
動弁に連結して、機関の回転により流体ポンプから吐出
される流体の圧力により作動するように構成して、この
流体圧が所定値以上になっｔことき減圧弁を作動させて
、シリンク内孔の内外の連通を遮断するようにしたこと
にその特徴かある。従って、本発明によれば、内燃機関
の駆動により循環する流体の圧力を有効に利用して、減
圧弁の開閉動作をタイミングよく適確に行うことができ
る。As described above, in the present invention, the pressure reducing valve constituting the startup pressure reducing device is connected to a pressure responsive valve communicating with the fluid pump, and the pressure of the fluid discharged from the fluid pump due to engine rotation is controlled. The feature lies in that the pressure reducing valve is operated when the fluid pressure exceeds a predetermined value, and communication between the inside and outside of the cylinder bore is cut off. Therefore, according to the present invention, the pressure of the fluid circulating due to the drive of the internal combustion engine can be effectively used to properly and timely open and close the pressure reducing valve.
第１図は本発明の一実施例に係る始動時減圧装置を組付
けた内燃機関の一例を示す概略部分縦断面図、第２図は
同地の実施例に係る始動時減圧装置を組付けた内燃機関
の他の一例を示す一部切欠概略部分平面図である。
符 号 の 説 明
１１シリンダボデー、１１ａ・・・・内孔、１１Ｃ・・
・・通孔、２２・・・・オイルポンプ、３０・・・・始
動時減圧装置、３０７ｔ・・・・減圧弁、３０１）・・
・・圧力応動弁、４０・・・・始動時減圧装置、４０ａ
・・・・減圧弁、４０１）・・・・圧力応動弁、４０Ｃ
・・・・連結機構。
１１−
第１図Fig. 1 is a schematic partial vertical cross-sectional view showing an example of an internal combustion engine equipped with a starting pressure reducing device according to an embodiment of the present invention, and Fig. 2 is a schematic partial vertical sectional view showing an example of an internal combustion engine fitted with a starting pressure reducing device according to an embodiment of the present invention. FIG. 3 is a partially cutaway schematic partial plan view showing another example of an internal combustion engine. Explanation of symbols 11 cylinder body, 11a...inner hole, 11C...
...Through hole, 22...Oil pump, 30...Start pressure reducing device, 307t...Pressure reducing valve, 301)...
...Pressure-responsive valve, 40...Starting pressure reducing device, 40a
...Pressure reducing valve, 401) ...Pressure responsive valve, 40C
...Connection mechanism. 11- Figure 1
Claims (1)
ともに、シリングボテ−に設けられてシリング内孔の内
外を連通させる通路に前記シリンダ内孔の内外の連通を
断続する減圧弁を備え、機関の始動開始時に前記シリン
ダ内孔の圧縮圧を減圧させるようにした内燃機関におい
て、当該内燃機関に前記流体ポンプに連通ずる圧力応動
弁を設けてこの圧力応動弁を前記減圧弁に連結させ、前
記流体ポンプから前記圧力応動弁へ所定値以上の流体圧
が加わったとき、前記減圧弁が閉状態となるように構成
したことを特徴とする内燃機関の始動時減圧装置。It is equipped with a fluid pump that discharges fluid as the engine rotates, and a pressure reducing valve that connects and disconnects communication between the inside and outside of the cylinder bore in a passage provided in the cylinder body that communicates the inside and outside of the cylinder bore. In an internal combustion engine in which the compression pressure in the cylinder inner hole is reduced at times, the internal combustion engine is provided with a pressure-responsive valve that communicates with the fluid pump, and the pressure-responsive valve is connected to the pressure-reducing valve. A pressure reducing device at the time of starting an internal combustion engine, characterized in that the pressure reducing valve is configured to be in a closed state when a fluid pressure of a predetermined value or more is applied to the pressure responsive valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12126081A JPS5823246A (en) | 1981-07-31 | 1981-07-31 | Starting pressure reduction device of internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12126081A JPS5823246A (en) | 1981-07-31 | 1981-07-31 | Starting pressure reduction device of internal combustion engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5823246A true JPS5823246A (en) | 1983-02-10 |
Family
ID=14806845
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12126081A Pending JPS5823246A (en) | 1981-07-31 | 1981-07-31 | Starting pressure reduction device of internal combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5823246A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63166676U (en) * | 1987-04-20 | 1988-10-31 | ||
| DE4420195A1 (en) * | 1993-06-11 | 1994-12-15 | Kioritz Corp | Decompressor for an internal combustion engine |
| US10252327B2 (en) | 2013-03-11 | 2019-04-09 | Ati Properties Llc | Enhanced techniques for centrifugal casting of molten materials |
-
1981
- 1981-07-31 JP JP12126081A patent/JPS5823246A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63166676U (en) * | 1987-04-20 | 1988-10-31 | ||
| DE4420195A1 (en) * | 1993-06-11 | 1994-12-15 | Kioritz Corp | Decompressor for an internal combustion engine |
| US10252327B2 (en) | 2013-03-11 | 2019-04-09 | Ati Properties Llc | Enhanced techniques for centrifugal casting of molten materials |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5816208A (en) | Engine decompression device | |
| JPH0794803B2 (en) | Lubricating oil passage structure of engine equipped with horizontal cylinder and outboard motor equipped with the engine | |
| US6394079B2 (en) | Gas-liquid separation device for internal combustion engine used in outboard motor | |
| JPH0210241Y2 (en) | ||
| US6973906B2 (en) | Internal combustion engine provided with decompressing mechanism and method of adjusting valve lift for decompression | |
| US6532927B2 (en) | Valve cam mechanism for four-cycle engine | |
| US6796294B2 (en) | Internal combustion engine | |
| JPS5823246A (en) | Starting pressure reduction device of internal combustion engine | |
| JPS6047812A (en) | Cam-surface lubricating structure for ship propelling four-cycle internal-combustion engine | |
| US6868835B2 (en) | Internal combustion engine | |
| US6857408B2 (en) | Internal combustion engine provided with decompressing mechanism | |
| JP3209486B2 (en) | Lubrication system for four-stroke engine | |
| JP2003301704A (en) | Internal combustion engine provided with decompressing means | |
| US7228832B2 (en) | Internal combustion engine with translatable camshaft | |
| JPH0842352A (en) | Lubricating device for four-cycle engine for model | |
| US5623898A (en) | Variable duration hydraulic valve lifters | |
| JPS6088811A (en) | Lubricating device for internal-combustion engine | |
| JP2006322438A (en) | Hydraulic valve lash adjuster for internal combustion engine | |
| JP2797061B2 (en) | 4 cycle engine | |
| JPS628357Y2 (en) | ||
| JPS6332112A (en) | Hydraulic lash adjustor | |
| JPH0526242Y2 (en) | ||
| JPS6011613A (en) | Lubricating oil return device for four-cycle internal- combustion engine | |
| JP3388229B2 (en) | Lubrication system for four-stroke engine | |
| JPS6335127Y2 (en) |