JPS63306215A - Decompression device for internal combustion engine - Google Patents
Decompression device for internal combustion engineInfo
- Publication number
- JPS63306215A JPS63306215A JP14077987A JP14077987A JPS63306215A JP S63306215 A JPS63306215 A JP S63306215A JP 14077987 A JP14077987 A JP 14077987A JP 14077987 A JP14077987 A JP 14077987A JP S63306215 A JPS63306215 A JP S63306215A
- Authority
- JP
- Japan
- Prior art keywords
- decompression
- cam
- weight
- decomp
- eccentric
- 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.)
- Granted
Links
- 230000006837 decompression Effects 0.000 title claims abstract description 64
- 238000002485 combustion reaction Methods 0.000 title claims description 7
- 230000001105 regulatory effect Effects 0.000 abstract description 4
- 238000009434 installation Methods 0.000 abstract 1
- 230000009471 action Effects 0.000 description 4
- 239000003638 chemical reducing agent Substances 0.000 description 4
- 230000007246 mechanism Effects 0.000 description 4
- 230000002093 peripheral effect Effects 0.000 description 4
- 230000009467 reduction Effects 0.000 description 4
- 230000004044 response Effects 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000010363 phase shift Effects 0.000 description 1
Landscapes
- Valve-Gear Or Valve Arrangements (AREA)
- Valve Device For Special Equipments (AREA)
Abstract
Description
【発明の詳細な説明】
A1発明の目的
(1) 産業上の利用分野
本発明は内燃機関のデコンプウエイトを備えたデコンプ
装置の改良に関するものである。DETAILED DESCRIPTION OF THE INVENTION A1 Object of the Invention (1) Industrial Field of Application The present invention relates to an improvement of a decompression device equipped with a decompression weight for an internal combustion engine.
(2)従来の技術
従来内燃機関の、デコンプウエイトを備えたデコンプ装
置は、たとえば特公昭53−37981号公報に開示さ
れる。(2) Prior Art A conventional decompression device for an internal combustion engine equipped with a decompression weight is disclosed, for example, in Japanese Patent Publication No. 53-37981.
(3)発明が解決しようとする問題点
ところが前記従来のデコンプ装置はこれを動弁カム軸等
の機関部品に取付けるために同部品に複雑な加工を施し
たり、また前記機関部品・\の組付けが面倒であったり
してコスト高を招くという問題がある。(3) Problems to be Solved by the Invention However, in order to attach the decompression device to an engine part such as a valve train camshaft, the conventional decompression device requires complex machining of the part, or the assembly of the engine part. There is a problem in that it is troublesome to attach, leading to high costs.
そこで本発明は、動弁カムには、僅かにストッパを設け
るだけで前記動弁カムに節単に組付けることができるよ
うにした構成節単な内燃機関のデコンプ装置を提供する
ことを目的とするものである。SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a decompression device for an internal combustion engine with a simple structure that can be easily assembled to the valve cam by simply providing a slight stopper on the valve cam. It is something.
B9発明の構成
(1)問題点を解決するための手段
本発明は前記目的達成のため動弁カムに、これと一体に
回転できろように設けられる基板と;この−U&に枢支
され、前記動弁カムの回転数の増減に応じて該動弁カム
の径方向に揺動される円弧状のデコンプウエイトと;前
記デコンプウエイトの自由端 に設けられ該デコンプウ
エイトの揺動に伴って前記動弁カムのベース円より出没
し得るデコンプ突起と;前記デコンプウエイトに連結さ
れ前記デコンプ突起を動弁カムのベース円より突出する
デコンプ位置に附勢するリターンばねと;前記動弁カム
に設けられ、前記デコンプウエイトがデコンプ位置に規
制されるように該デコンプウエイトと衝合し得るストッ
パとを備える。B9 Structure of the Invention (1) Means for Solving Problems In order to achieve the above-mentioned object, the present invention includes a base plate provided on a valve operating cam so as to be able to rotate integrally therewith; an arcuate decompression weight that swings in the radial direction of the valve cam in response to an increase or decrease in the rotational speed of the valve cam; a decompression protrusion that can protrude and retract from the base circle of the valve drive cam; a return spring that is connected to the decompression weight and biases the decompression protrusion to a decompression position that projects from the base circle of the valve drive cam; and a return spring that is provided on the valve drive cam; , a stopper that can collide with the decompression weight so that the decompression weight is regulated at the decompression position.
(2)作 用
機関の始動時の如きクランク軸の回転数が設定値以下の
ときはデコンプウエイトはリターンばねの弾発力により
デコンプ位置に偏倚され、該デコンプウエイトと一体の
デコンプ突起は動弁カムのベース円よりも外方に突出し
て排気側カムフォロアをリフトさせデコンプ作用が行わ
れ、また機関の始動後、クランク軸の回転数が設定値を
超えるとデコンプウエイトはそこに作用する遠心力によ
りリターンばねの弾発力に抗してデコンプ解除位置に偏
倚され、デコンプカムは動弁カムのベース円よりも内方
に没入してデコンプ作用が解除される。(2) Function When the rotation speed of the crankshaft is below a set value, such as when starting the engine, the decompression weight is biased to the decompression position by the elastic force of the return spring, and the decompression protrusion integrated with the decompression weight moves the valve. The decompression effect is performed by lifting the exhaust side cam follower by protruding outward from the base circle of the cam, and when the crankshaft rotation speed exceeds the set value after the engine has started, the decompression weight is activated by the centrifugal force acting on it. The decompression cam is biased to the decompression release position against the elastic force of the return spring, and the decompression cam is recessed inward from the base circle of the valve train cam, and the decompression action is released.
(3)実施例 以下、図面により本発明の実施例について説明する。(3) Examples Embodiments of the present invention will be described below with reference to the drawings.
第1〜3図において機関本体Eにボール軸受2を介して
回転自在に支承されるクランク軸1には1/2減速機R
が設けられる。この1/2減速機Rは、クランク軸に固
着される偏心駆動カムCa1と、この偏心駆動カムCa
+の外周に外接されて機関本体Eに回転自在に支承され
る偏心従動カムCazとより構成され、クランク軸1の
回転は1/2減速比を以て偏心従動カムCazに伝達さ
れるようになっている。而して1/2減速機Rの構成は
後に詳述する。In Figs. 1 to 3, a crankshaft 1 rotatably supported by an engine body E via a ball bearing 2 has a 1/2 speed reducer R.
is provided. This 1/2 speed reducer R includes an eccentric drive cam Ca1 fixed to the crankshaft, and this eccentric drive cam Ca1.
It consists of an eccentric driven cam Caz circumscribed on the outer periphery of the engine body E and rotatably supported by the engine body E, and the rotation of the crankshaft 1 is transmitted to the eccentric driven cam Caz with a 1/2 reduction ratio. There is. The configuration of the 1/2 speed reducer R will be described in detail later.
偏心従動カムCa2の外周には、一つの動弁カム3が一
体に形成され、この動弁カム3のカム面に従来公知のカ
ムフォロア4.5のスリンパ面42,5.が当接される
。そしてこれらのカムフォロア4,5は従来公知の動弁
機構を介して燃焼室に設けられる吸、排気弁に連動され
ている9偏心従動カムCazと一体の動弁カム3のクラ
ンク軸lを囲む円筒部6の外周には、環状の基板7が固
着され、この基板7には円弧状をなして前記動弁カム3
のカム面に沿うように延びるデコンプウエイト8が径方
向に回動自在に枢支軸9を以て枢支される。前記デコン
プウエイト8の自由端にはピンよりなるデコンプ突起1
0が前記動弁カム3の側面に向けて一体に設けられる。One valve-driving cam 3 is integrally formed on the outer periphery of the eccentric driven cam Ca2, and the cam surface of this valve-driving cam 3 is provided with slimper surfaces 42, 5. is brought into contact. These cam followers 4 and 5 are cylindrical bodies that surround the crankshaft l of the valve drive cam 3 that is integrated with nine eccentric driven cams Caz that are interlocked with intake and exhaust valves provided in the combustion chamber through a conventionally known valve drive mechanism. An annular base plate 7 is fixed to the outer periphery of the portion 6, and the valve drive cam 3 is attached to the base plate 7 in an arc shape.
A decompression weight 8 extending along the cam surface is pivotably supported by a pivot shaft 9 so as to be rotatable in the radial direction. The free end of the decompression weight 8 has a decompression protrusion 1 made of a pin.
0 is integrally provided toward the side surface of the valve operating cam 3.
デコンプウエイト8の途中と、基板7間には引張コイル
ばねよりなるリターンばね11が張架され、このリター
ンばね11の引張力はデコンプウエイト8を内側に牽引
するように作用し、前記デコンプ突起lOを動弁カム3
のベース円cbよりも外方に突出するように偏倚する。A return spring 11 made of a tension coil spring is stretched between the middle of the decompression weight 8 and the substrate 7, and the tensile force of this return spring 11 acts to pull the decompression weight 8 inward. The valve train cam 3
It is biased so as to protrude outward from the base circle cb of.
前記偏心従動カムCa、の、前記デコンプウエイト8と
対面する側面には扇形状の凹部12が形成され、この凹
部12に前記デコンプ突起10の先端が進入しており、
このデコンプ突起lOは前記凹部12の壁面よりなるス
トッパ13に衝合してデコンプウエイト8をデコンプ位
置に規制できるようになっている。また基板7の外周に
は、前記デコンプウエイト8の外側中間部に対向するス
トッパ片14が一体に形成されており、このストッパ片
14は、基板7がデコンプウエイト8とともに回転し、
該デコンプウエイト8が遠心力をうけて径方向外方に揺
動するとき、その揺動位置、すなわちそのデコンプ解除
位置を規制できるようになっている。A fan-shaped recess 12 is formed on the side surface of the eccentric driven cam Ca facing the decompression weight 8, and the tip of the decompression protrusion 10 enters the recess 12.
This decompression protrusion 10 abuts against a stopper 13 made of the wall surface of the recess 12, so that the decompression weight 8 can be restricted to the decompression position. Further, a stopper piece 14 is integrally formed on the outer periphery of the substrate 7 and faces the outer intermediate portion of the decompression weight 8, and this stopper piece 14 allows the substrate 7 to rotate with the decompression weight 8,
When the decompression weight 8 swings outward in the radial direction due to centrifugal force, its swing position, that is, its decompression release position can be regulated.
次に前記1/2減速機Rの構造を主に第3.4図を参照
して説明すると、この偏心駆動カムCa1には一対の第
1.第2偏心輪15+、15□が一体に並設されている
。前記一対の第1.第2偏心輪151,15□に外接す
る偏心従動カムCa2が第1.第2偏心輪t5+、15
□のクランク軸1に対する偏心輪eと等しい偏心量で機
関本体已に回転自在に支持されている。偏心従動カムC
a2の外周面には、前述のように吸、排気用の一つの動
弁カム3が形成され、この動弁カム3に前述の吸、排気
用カムフォロア4.5のスリッパ面4+、5+ が当接
される。Next, the structure of the 1/2 speed reducer R will be explained mainly with reference to FIG. The second eccentric wheels 15+ and 15□ are integrally arranged in parallel. The first of the pair. The eccentric driven cam Ca2 circumscribing the second eccentric wheels 151, 15□ is the first eccentric driven cam Ca2. Second eccentric wheel t5+, 15
It is rotatably supported on the engine body with an eccentricity equal to that of the eccentric wheel e with respect to the crankshaft 1 in □. Eccentric driven cam C
As mentioned above, one valve drive cam 3 for intake and exhaust is formed on the outer peripheral surface of a2, and the slipper surfaces 4+ and 5+ of the above-mentioned intake and exhaust cam followers 4.5 are applied to this valve drive cam 3. be touched.
第1.第2偏心輪151,15□は横断面円形の筒状外
周面を有し、クランク軸lの直径方向に見て互いに反対
方向にクランク軸1の中心軸線C0から偏心量eだけ偏
心している。1st. The second eccentric wheels 151, 15□ have a cylindrical outer circumferential surface with a circular cross section, and are eccentric by an eccentric amount e from the central axis C0 of the crankshaft 1 in opposite directions when viewed in the diametrical direction of the crankshaft l.
第1.第2偏心輪15..15□の位置に対応して、ク
ランク軸1の中心軸線C0から偏心ileだけ偏心した
中心軸線C1を有する偏心従動カムCa、の中空部を形
成する第1.第2内周面161,16□は第1.第2偏
心輪15..15!の外周面を取り囲んでいる。1st. Second eccentric wheel 15. .. Corresponding to the position of 15□, the first. The second inner circumferential surface 161, 16□ is the first inner circumferential surface 161, 16□. Second eccentric wheel 15. .. 15! surrounds the outer circumferential surface of.
第1内周面16.は、クランク軸1の回転に伴って常に
第1偏心輪151を挟んだ状態でその第1偏心輪15.
に外接しつつ回転する互いに並行な一対の対向面部16
.−1.16□−2を有するとともに、第2内周面16
□は、クランク軸1の回転に伴って常に第2偏心輪15
gを挟んだ状態で該第2偏心輪15□に外接しつつ回転
する互いに平行な一対の対向面部16□−1,16□−
2を有し、第1内周面16.の各対向面部16゜−1,
161−2と第2内周面16□の各対向面部16□−1
,16□−2とは、互いに90°だけ位相がずれた状態
で形成されている。First inner peripheral surface 16. As the crankshaft 1 rotates, the first eccentric wheel 15. is constantly sandwiching the first eccentric wheel 151.
A pair of mutually parallel opposing surfaces 16 that rotate while circumscribing the
.. -1.16□-2, and the second inner peripheral surface 16
□ is always the second eccentric wheel 15 as the crankshaft 1 rotates.
A pair of mutually parallel opposing surface portions 16□-1, 16□- rotate while circumscribing the second eccentric ring 15□ with g sandwiched therebetween.
2, and has a first inner circumferential surface 16. Each opposing surface portion 16°-1,
161-2 and each opposing surface portion 16□-1 of the second inner peripheral surface 16□
, 16□-2 are formed with a phase shift of 90° from each other.
第5図(a)および第6図(a)において、第1偏心輪
151が下向きに偏心した状態にあるときには対向面部
16+ 1.16+ 2は上下方向に延在し、こ
のときには第2偏心輪15□は上向きに偏心していると
ともに対向面部16□−1,16□−2は水平方向に延
在している。この状態においてクランク軸lが矢印fの
向きに回転すると、各一対の対向面部と第1.第2偏心
輸151,152との各一対の外接線のうち、クランク
軸lの中心軸線C0からの距離が増大する側の外接線上
において、第1.第2偏心輪15..15□が対向面部
を押圧して偏心従動カムCazにトルクを伝達する。す
なわち、第1偏心輪15.は、対向面部16.−2を押
圧するとともに第2偏心輪152は対向面部16□−1
を押圧する。その結果、第1.第2偏心輸15..15
.の回転が90゜進んだときには、第5図(b)、第6
図(b)のように偏心従動カムCa、の回転が45°進
む。第1偏心輪15、は更に対向面部16.−2を押し
続けるとともに第2偏心輪15□は、対向面部162−
1を押し続け、第1.第2偏心輪15..152の回転
が180°進むと、第5図(C)、第6図(C)のよう
に偏心従動カムCa、の回転は90°だけ進む。この時
点で第1.第2偏心輪ts+、tszが更に回転すると
、第1偏心輪15.は対向面部161−1を押し始める
とともに、第2偏心輪15□は対向面部16□−1を押
し続ける。第1゜第2偏心輪15..15□の回転が更
に進んで270°まで回転すると、第5図(d)、第6
図(d)のように偏心従動カムCazは135°だけ回
転する。In FIG. 5(a) and FIG. 6(a), when the first eccentric wheel 151 is in a downwardly eccentric state, the facing surface portion 16+1.16+2 extends in the vertical direction, and in this case, the second eccentric wheel 15□ is eccentric upward, and the opposing surface portions 16□-1 and 16□-2 extend in the horizontal direction. In this state, when the crankshaft l rotates in the direction of the arrow f, each pair of opposing surfaces and the first... Among each pair of external tangents to the second eccentric shafts 151 and 152, the first. Second eccentric wheel 15. .. 15□ presses the opposing surface portion and transmits torque to the eccentric driven cam Caz. That is, the first eccentric wheel 15. is the facing surface portion 16. -2 and the second eccentric wheel 152 presses the opposing surface portion 16□-1.
Press. As a result, 1. 2nd eccentric transfer 15. .. 15
.. When the rotation progresses by 90 degrees, Fig. 5 (b)
As shown in Figure (b), the eccentric driven cam Ca rotates by 45 degrees. The first eccentric wheel 15 further has an opposing surface portion 16. -2 while continuing to press the second eccentric wheel 15□.
Press and hold 1. Second eccentric wheel 15. .. When the rotation of cam 152 progresses by 180°, the rotation of the eccentric driven cam Ca progresses by 90° as shown in FIGS. 5(C) and 6(C). At this point, the first. When the second eccentric wheels ts+ and tsz further rotate, the first eccentric wheel 15. starts pushing the opposing surface portion 161-1, and the second eccentric wheel 15□ continues to push the opposing surface portion 16□-1. 1st degree second eccentric wheel 15. .. When the rotation of 15□ progresses further and rotates to 270°, Fig. 5 (d) and Fig. 6
As shown in Figure (d), the eccentric driven cam Caz rotates by 135°.
以上のようにクランク軸1の回転により偏心駆動カムC
at と、偏心従動カムCa zが第5,6図(a)〜
(d)に示す回転運動を繰り返すことによりクランク軸
1の回転は1/2の減速比を以て偏心従動カムCazに
伝達され、偏心従動カムCa、上の動弁カム3により、
前述のように一対のカムフォロア4.5が揺動され、ブ
ツシュロッドを含む従来公知の動弁機構を介して吸、排
気弁が作動される。As described above, the rotation of the crankshaft 1 causes the eccentric drive cam C to
at and the eccentric driven cam Caz are shown in Figures 5 and 6 (a) ~
By repeating the rotational movement shown in (d), the rotation of the crankshaft 1 is transmitted to the eccentric driven cam Caz with a reduction ratio of 1/2, and the eccentric driven cam Ca and the upper valve drive cam 3,
As described above, the pair of cam followers 4.5 are oscillated, and the intake and exhaust valves are operated via a conventionally known valve operating mechanism including a bushing rod.
次にこの実施例の作用について説明すると、いま機関を
始動すべ(、クランキングすれば、クランク軸1が回転
されるが、その回転数は所定の設定回転数以下であるた
め1/2iA速機Rの従動偏心カムCazの回転数も低
く、デコンプウェイト8はリターンばね11の弾発力に
より、クランク軸1側に引き寄せられ、第2図(A)に
示すようにその先端は動弁カム3側面のストンパ13に
衝合されて固定状態となり、デコンプ突起10は動弁カ
ム3のベース円よりも外方に突出される。したがって機
関の始動時にはクランク軸1の回転により1/2凍速比
で駆動される動弁カム3のデコンプ突起10は排気側カ
ムフォロア5のスリンパ面51に衝合して該カムフォロ
ア5をリフトさせ図示しない動弁機構を介して圧縮行程
時の排気弁を開弁じて燃焼室圧を減圧しデコンプ作用が
行われる。Next, to explain the operation of this embodiment, when the engine is started (cranked), the crankshaft 1 is rotated, but since the rotation speed is less than the predetermined set rotation speed, the 1/2 iA speed The rotational speed of the driven eccentric cam Caz of R is also low, and the decompression weight 8 is drawn toward the crankshaft 1 side by the elastic force of the return spring 11, and its tip touches the valve drive cam 3 as shown in FIG. The decompression projection 10 is brought into a fixed state by colliding with the stopper 13 on the side, and is projected outward from the base circle of the valve train cam 3. Therefore, when starting the engine, the rotation of the crankshaft 1 causes the decompression speed ratio to be reduced to 1/2. The decompression protrusion 10 of the valve drive cam 3 that is driven by the engine collides with the slimmer surface 51 of the exhaust side cam follower 5, lifts the cam follower 5, and opens the exhaust valve during the compression stroke via a valve drive mechanism (not shown). A decompression action is performed by reducing the combustion chamber pressure.
機関が始動され、クランク軸1の回転数が設定値を超え
ると1/2減速aRの従動偏心カムCa2の回転も増速
されるため、デコンプウエイト8は、そこに作用する遠
心力の増加により第2図(B)に示すようにリターンば
ね11の弾発力に抗して枢支軸9回りに外方に揺動して
ストッパ片14に衝合し第2図(B)に示すように固定
状態となり、デコンプ突起10は動弁カム3のベース円
cbよりも内方に没入し、該デコンプ突起10により前
述のデコンプ作用は行われなくなる。When the engine is started and the rotation speed of the crankshaft 1 exceeds the set value, the rotation speed of the driven eccentric cam Ca2 of the 1/2 reduction aR is also increased, so the decompression weight 8 is reduced due to the increase in the centrifugal force acting thereon. As shown in FIG. 2(B), it swings outward around the pivot shaft 9 against the elastic force of the return spring 11 and collides with the stopper piece 14, as shown in FIG. 2(B). , the decompression projection 10 is recessed inward from the base circle cb of the valve operating cam 3, and the decompression action described above is no longer performed by the decompression projection 10.
以上の実施例ではクランク軸上に直接1/2残速機Rを
設け、その従動偏心カムCa、、すなわち動弁カム3に
本発明デコンプ装置を設けた場合を説明したがクランク
軸1と別設されてl/2N速機構を介して駆動される動
弁カム軸上の動弁カムに本発明デコンプ装置を設けても
よいことは勿論である。In the above embodiment, a case was explained in which the 1/2 residual speed gear R was provided directly on the crankshaft, and the decompression device of the present invention was provided on its driven eccentric cam Ca, that is, the valve drive cam 3. It goes without saying that the decompression device of the present invention may be provided on a valve operating cam on a valve operating camshaft which is provided and driven via a 1/2N speed mechanism.
C1発明の効果
以上のように本発明デコンプ装置は、機関の木来の構成
部品には僅かにその動弁カムにストッパ面を形成するだ
けで機関に組付けることができ、しかもユニット化され
ているので、その組付性が極めてよく、しかも部品点数
も少なく構成も簡単であり、全体として大幅なコストダ
ウンを回ることができる。C1 Effects of the Invention As described above, the decompression device of the present invention can be assembled into an engine by simply forming a stopper surface on the valve drive cam of the engine component, and is unitized. As a result, it is extremely easy to assemble, has a small number of parts, and has a simple configuration, resulting in a significant cost reduction as a whole.
図面は本発明装置の一実施例を示すもので、第1図は第
2図(A)l−1線に沿う縦断側面図、第2図(A)、
(B)は第1図■−■線に沿う断面図で、第2図(A)
は機関の始動時、第2図CB)は機関始動後の状態をそ
れぞれ示す。第3図は、第1図■−■線に沿う断面図、
第4図は、第1図IV−IV線に沿う断面図、第5図(
a)〜(d)は第1の偏心カムと偏心従動カムとの関係
をクランク軸の回転角の変化に対応して順次示した第3
図に相当する作用図、第6図(a)〜(d)は第2偏心
カムと偏心従動カムとの関係をクランク軸の回転角の変
化に対応して順次示した、第4図に相当する作用図であ
る。
cb・・・ベース円、The drawings show one embodiment of the device of the present invention, and FIG. 1 is a longitudinal cross-sectional side view taken along the line 1-1 in FIG.
(B) is a sectional view taken along the line ■-■ in Figure 1, and Figure 2 (A)
Figure 2 (CB) shows the state when the engine is started, and Fig. 2 (CB) shows the state after the engine has started. Figure 3 is a sectional view taken along line ■-■ in Figure 1;
Figure 4 is a sectional view taken along the line IV-IV in Figure 1, and Figure 5 (
a) to (d) are the third diagrams showing the relationship between the first eccentric cam and the eccentric driven cam in response to changes in the rotation angle of the crankshaft.
6(a) to 6(d) correspond to FIG. 4, which sequentially shows the relationship between the second eccentric cam and the eccentric driven cam in response to changes in the rotation angle of the crankshaft. This is an action diagram. cb...Base circle,
Claims (1)
られる基板(7)と;この基板(7)に枢支され、前記
動弁カム(3)の回転数の増減に応じて該動弁カム(3
)の径方向に揺動される円弧状のデコンプウエイト(8
)と:前記デコンプウエイト(8)の自由端に設けられ
該デコンプウエイト(8)の揺動に伴って前記動弁カム
(3)のベース円(Cb)より出没し得るデコンプ突起
(10)と;前記デコンプウエイト(8)に連結され前
記デコンプ突起(10)を動弁カム(3)のベース円(
Cb)より突出するデコンプ位置に附勢するリターンば
ね(11)と;前記動弁カム(3)に設けられ、前記デ
コンプウエイト(8)がデコンプ位置に規制されるよう
に該デコンプウエイト(8)と衝合し得るストッパ(1
3)とを備えていることを特徴とする内燃機関のデコン
プ装置。A base plate (7) is provided on the valve drive cam (3) so as to be able to rotate together with the valve drive cam (3); Valve cam (3
) is an arc-shaped decompression weight (8
) and: a decompression protrusion (10) provided at the free end of the decompression weight (8) and capable of retracting from the base circle (Cb) of the valve operating cam (3) as the decompression weight (8) swings; ; Connected to the decompression weight (8), the decompression protrusion (10) is connected to the base circle (
a return spring (11) protruding from Cb) biased to the decompression position; a return spring (11) provided on the valve drive cam (3) so as to restrict the decompression weight (8) to the decompression position; A stopper (1
3) A decompression device for an internal combustion engine, comprising:
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62140779A JPH086574B2 (en) | 1987-06-05 | 1987-06-05 | Decompression device for internal combustion engine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62140779A JPH086574B2 (en) | 1987-06-05 | 1987-06-05 | Decompression device for internal combustion engine |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS63306215A true JPS63306215A (en) | 1988-12-14 |
JPH086574B2 JPH086574B2 (en) | 1996-01-24 |
Family
ID=15276548
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62140779A Expired - Fee Related JPH086574B2 (en) | 1987-06-05 | 1987-06-05 | Decompression device for internal combustion engine |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH086574B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1998011330A1 (en) * | 1996-09-11 | 1998-03-19 | Motorenfabrik Hatz Gmbh & Co. Kg | Automatic decompression system |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6214106U (en) * | 1985-07-12 | 1987-01-28 |
-
1987
- 1987-06-05 JP JP62140779A patent/JPH086574B2/en not_active Expired - Fee Related
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6214106U (en) * | 1985-07-12 | 1987-01-28 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1998011330A1 (en) * | 1996-09-11 | 1998-03-19 | Motorenfabrik Hatz Gmbh & Co. Kg | Automatic decompression system |
US6223708B1 (en) | 1996-09-11 | 2001-05-01 | Motorenfabrik Hatz Gmbh & Co. Kg | Automatic decompression system |
Also Published As
Publication number | Publication date |
---|---|
JPH086574B2 (en) | 1996-01-24 |
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