JPS6075706A - Tappet for engine - Google Patents

Tappet for engine

Info

Publication number
JPS6075706A
JPS6075706A JP18403883A JP18403883A JPS6075706A JP S6075706 A JPS6075706 A JP S6075706A JP 18403883 A JP18403883 A JP 18403883A JP 18403883 A JP18403883 A JP 18403883A JP S6075706 A JPS6075706 A JP S6075706A
Authority
JP
Japan
Prior art keywords
tappet
contact member
tappet body
seam
valve
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
Application number
JP18403883A
Other languages
Japanese (ja)
Inventor
Hiroshi Oguchi
小口 博
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to JP18403883A priority Critical patent/JPS6075706A/en
Publication of JPS6075706A publication Critical patent/JPS6075706A/en
Pending legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/20Adjusting or compensating clearance
    • F01L1/22Adjusting or compensating clearance automatically, e.g. mechanically
    • F01L1/24Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically
    • F01L1/245Hydraulic tappets
    • F01L1/255Hydraulic tappets between cam and rocker arm

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)

Abstract

PURPOSE:To improve stiffness of an oil pressure tappet and always enable to secure the predetermined valve lift volume by accommodating a contact member with a rocker arm in a cylindrical tappet body with bottom free of sliding and by supporting the contact portion on the supporting portion in the tappet body. CONSTITUTION:A tappet 20 comprises a cylindrical tappet body 5 with bottom, a cylindrical seam 21 which is interposed into the tappet body 5 and a contact member 8 with a rocker arm 3 which is fitted in the tapper body 5 free of sliding so as to place it on the seam 21. In the contact member 8, a groove 15 which is dent upward is provided in the lower wall of the circumference, and an oil path 16 is also provided whose both ends are opened in the circumference plane and the upper plane. On the other hand, the upper end plane of the seam 21 are made as a supporting portion 22 which supports the contact member 8, and the length of this seam 21 is set so as to have an appropriate valve clearance.

Description

【発明の詳細な説明】 この発明はエンジン用タペツトに関する。[Detailed description of the invention] This invention relates to a tappet for an engine.

最近の自動車用エンジンの動弁系においては、メンテナ
ンス・つりーを目的として第1図に示すように、カム(
1)の回転がハイドロリツク・ラツシユ・アジヤスタと
も称される油圧タペツト(2)を介してロツカ・アーム
(3)の揺動に変換され、その結果バルブ(4)が駆動
されるようになつている。油圧タペツト(2)は、有底
円筒形タペツト本体(5)と、タペツト本体(5)内に
、タペツト本体(5)の底壁との間にコイルばね(6)
を介して入れられたプランジヤ(7)と、タぺツト本体
(5)内に上下方向に摺動自在に入れられてプランジヤ
(7)上に載せられたロツカ・アーム(3)との当接部
材(8)とを備えている。プランジヤ(7)とタペツト
本体(5)との間の空間が圧力油室(9)となされてい
る。タペツト本体(5)の周壁にはオイル供給口(10
)が形成されている。プランジヤ(7)は有底円筒形で
、その内陪がオイル保持室(11)となされるとともに
底壁(7a)に開口(12)が形成されている。また、
プランジヤ(7)の下面にチエツク・ボール・ケージ(
13)が取付けられ、このチエツク・ボール・ケージ(
13)内に開口(12)を塞ぎうるチエツク・ボール(
14)が入れられている。当接部材(8)の下面の周壁
には上方に凹んだ溝(15)が設けられている。また、
当接部材(8)には、両端がその周面と上面に開口した
オイル通路の(16)が設けられている。
In the valve train systems of recent automobile engines, cams (
The rotation of 1) is converted into rocking motion of the rocker arm (3) via a hydraulic tapepet (2), also called a hydraulic lock adjuster, and as a result, the valve (4) is driven. There is. The hydraulic tappet (2) has a bottomed cylindrical tappet body (5) and a coil spring (6) inside the tappet body (5) and between the bottom wall of the tappet body (5).
Contact between the plunger (7), which is inserted through the tappet body (5), and the rocker arm (3), which is slidably inserted in the vertical direction and placed on the plunger (7). A member (8). The space between the plunger (7) and the tappet body (5) is a pressure oil chamber (9). The peripheral wall of the tapepet body (5) has an oil supply port (10
) is formed. The plunger (7) has a cylindrical shape with a bottom, the inner part of which serves as an oil holding chamber (11), and an opening (12) formed in the bottom wall (7a). Also,
Check ball cage (
13) is installed and this check ball cage (
13) has a check ball (
14) is included. A groove (15) recessed upward is provided in the peripheral wall of the lower surface of the contact member (8). Also,
The abutting member (8) is provided with an oil passage (16) whose both ends are open on its circumferential surface and upper surface.

このような構成において、タペツト本体(5)のオイル
供給口(10)からタペツト本体(5)内にエンジンオ
イルが入リ、オイル保持室(11)に保持される。そし
て、チエツク・ボール(14)が開いたときのみ、オイ
ルは開口(12)を通つて圧力油室(9)内に流れ込む
。そして、第2図に示すように、油圧タペツト(2)が
カム(1)のリフト部に乗り上げると、バルブ(4)が
押し下げられて開き、バルブ・スプリング(4a)の弾
性力がロツカ・アーム(3)、当接部材(8)およびプ
ランジヤ(7)を介して圧力油室(9)にかかる。そう
すると、圧力油室(9)に高圧が生じ、チエツク・ボー
ル(14)により開口(12)が塞がれる。カム(1)
が1回転する間に圧力油室(9)にかかる力によつて圧
力油室(9)内のオイルは、タペツト本体(5)内周面
とプランジヤ(7)外周面との隙間を通つてプランジヤ
(7)の上方に抜ける。その結果、油圧タペツト(2)
全体の長さは50μm程度縮むようになつている。そし
て、再び第1図に示すように、カム(1)のリフト部か
せベース部に戻つたときに、バルブ(4)がバルブシー
ト(4b)に着座し、バルブ・スプリング(4a)の力
は油圧タペツト(2)にかからなくなる。すると、圧力
油室(9)内にあるプランジヤ・スプリング(6)の弾
性力によリプランジヤ(7)が押し上げられ、チエツク
・ボール(14)が開口(12)から離れて開口(12
)が開き、オイル保持室(11)内のオイルが圧力油室
(9)内に補充される。
In this configuration, engine oil enters the tappet body (5) from the oil supply port (10) of the tappet body (5) and is retained in the oil holding chamber (11). Then, only when the check ball (14) is opened, oil flows into the pressure oil chamber (9) through the opening (12). As shown in Fig. 2, when the hydraulic tappet (2) rides on the lift part of the cam (1), the valve (4) is pushed down and opened, and the elastic force of the valve spring (4a) is applied to the rocker arm. (3) is applied to the pressure oil chamber (9) via the abutting member (8) and the plunger (7). Then, high pressure is generated in the pressure oil chamber (9) and the opening (12) is closed by the check ball (14). Cam (1)
Due to the force applied to the pressure oil chamber (9) during one rotation, the oil in the pressure oil chamber (9) passes through the gap between the inner circumferential surface of the tappet body (5) and the outer circumferential surface of the plunger (7). It exits above the plunger (7). As a result, the hydraulic tappet (2)
The overall length is reduced by about 50 μm. Then, as shown in Fig. 1 again, when the cam (1) returns to the lift skein base, the valve (4) seats on the valve seat (4b), and the force of the valve spring (4a) is It will no longer touch the hydraulic tappet (2). Then, the re-plunger (7) is pushed up by the elastic force of the plunger spring (6) in the pressure oil chamber (9), and the check ball (14) moves away from the opening (12).
) is opened, and the oil in the oil holding chamber (11) is replenished into the pressure oil chamber (9).

このような動作を繰返して油圧タペツト(2)は、バル
ブ(4)、ロツカ・アーム(3)、カム(1)等の間に
生じる隙間(バルブ・クリアランス)を無くすようにな
つている。
By repeating this operation, the hydraulic tappet (2) eliminates the gap (valve clearance) that occurs between the valve (4), rocker arm (3), cam (1), etc.

ところが油圧タペツト(2)の圧力油室(9)内には多
くの微細な泡を含むエンジン・オイルが入つて来るため
に、動弁系の剛性が低下する。
However, since engine oil containing many fine bubbles enters the pressure oil chamber (9) of the hydraulic tappet (2), the rigidity of the valve train is reduced.

よつて、カム(1)によるバルブ・リフト量は設定され
た波形(第3図実線参照)を描かなくなり、これよりも
小さな波形(第3図破線参照)を描くようになる。その
結果、エンジンの出力低下をきたすとともに、低いエン
ジン回転からバルブ異常運動を始め、エンジン音の音質
が悪くなつて商品性を損ない、しかも動弁系の破損の原
因となるという問題がある。
Therefore, the valve lift amount by the cam (1) no longer draws the set waveform (see the solid line in FIG. 3), but a smaller waveform (see the broken line in FIG. 3). As a result, there is a problem in that the output of the engine is reduced, the valves begin to move abnormally at low engine speeds, the quality of the engine sound deteriorates, impairing the marketability, and even causing damage to the valve train system.

この発明は、上記の問題点を克服したエンジン用タペツ
トを提供することを目的とする。
SUMMARY OF THE INVENTION An object of the present invention is to provide an engine tappet that overcomes the above-mentioned problems.

この発明によるエンジン用タペツトは、有底円筒形タペ
ツト本体と、タペツト本体内に入れられているロツカ・
アームとの当接部材とのよりなり、タペツト本体内の所
定高さ位置に当接部材を支持する支持部が設けられ、支
持部上に当接部材が載せられているものである。
The engine tappet according to the present invention includes a bottomed cylindrical tappet body, and a rocker housing contained in the tappet body.
It consists of an arm and an abutting member, a support part for supporting the abutting member is provided at a predetermined height position within the tapepet body, and the abutting member is placed on the support part.

上記において、タペツト本体としては、従来の動弁系に
おける油圧タペツトのタペツト本体を利用することがで
きる。当接部材を支持する支持部は、タペツト本体内に
所定高さの円筒状または円柱状の鋳鉄製シムを入れたり
、あるいはタペツト本体内周面の所定高さ位置にリング
を溶接等により固定することにより形成される。すなわ
ち、シムの上面セリングの上面が支持部となされる。支
持部の高さ位置は、バルブの種類(吸気側か排気側か)
、エンジンの形式等を考慮してめられるものであり、バ
ルブ・クリアランスが最適の大きさとなるように設定さ
れる。ロツカ・アームとの当接部材としては、従来の動
弁系における油圧タペツトの当接部材を利用することが
できる。
In the above, the tappet body of a hydraulic tappet in a conventional valve train system can be used as the tappet body. The support part that supports the contact member is made by inserting a cylindrical or cylindrical cast iron shim of a predetermined height inside the tappet body, or by fixing a ring at a predetermined height position on the inner peripheral surface of the tappet body by welding or the like. It is formed by That is, the upper surface of the upper surface cell of the shim serves as a support portion. The height position of the support part depends on the type of valve (intake side or exhaust side)
This is determined by considering the type of engine, etc., and the valve clearance is set to the optimum size. As the contact member for the rocker arm, a contact member for a hydraulic tappet in a conventional valve train system can be used.

このようなペツトは、すでに動弁系に使用されている従
来の油圧タペツトを改良することによつても形成される
。すなわち、従来の油圧タペツトにおけるタペツト本体
内からプランジヤ、プランジヤ・スプリング、チエツク
・ボール・ケージ、当接部材を取りはずし、タペツト本
体内に支持部を設けた後、この支持部上に当接部材を載
せればよい。
Such a pet can also be formed by modifying conventional hydraulic tappets already used in valve systems. That is, in a conventional hydraulic tappet, the plunger, plunger spring, check ball cage, and abutting member are removed from the tappet body, a support part is provided in the tappet body, and the abutment member is placed on this support part. That's fine.

この発明のエンジン用タペツトは、上述のように構成さ
れているので、油圧タペツトに比べてタペツトの剛性が
高くなる。したがつて、常に所定のバルブ・リフト量が
得られ、エンジンの高出力化が可能となる。また低いエ
ンジン回転からバルブ異常運動が起こることはなく、エ
ンジン音の音質も良好なものとなり商品性が高まり、し
かも動弁系の寿命も比躍的に向上する。また、従来の油
圧タペツトよりも軽量化されるので、エンジンの高速運
転性能さはさらに向上する。さらに、従来の油圧タペツ
トに若干の改良を施すだけでもつくることができるので
、製造が容易になる。
Since the engine tappet of the present invention is constructed as described above, the tappet has higher rigidity than a hydraulic tappet. Therefore, a predetermined valve lift amount can always be obtained, making it possible to increase the output of the engine. In addition, abnormal valve movement does not occur due to low engine speeds, the quality of the engine sound is improved, the marketability is improved, and the life of the valve train is dramatically improved. Also, since it is lighter than conventional hydraulic tappets, the engine's high-speed operation performance is further improved. Furthermore, manufacturing is facilitated since it can be made with only minor modifications to conventional hydraulic tappets.

この発明を、以下第4図に示す実施例について説明する
This invention will be described below with reference to an embodiment shown in FIG.

タペツト(20)は有底円筒形タペツト本体(5)と、
タペツト本体(5)内に入れられた円筒状シム(21)
と、タペツト本体(5)内に入れられてシム(21)上
に載せられたロツカ・アームとの当接部材(8)とより
なる。タペツト本体(5)および当接部材(8)は、第
1図および第2図に示すものと同じものが用いられてお
り、同一符号が付されている。
The tappet (20) includes a bottomed cylindrical tappet body (5),
Cylindrical shim (21) placed inside the tapepet body (5)
and a rocker arm abutment member (8) placed within the tapepet body (5) and placed on the shim (21). The tappet body (5) and the abutting member (8) are the same as those shown in FIGS. 1 and 2, and are given the same reference numerals.

シム(21)は、たとえば鋳鉄によつてつくられている
。そして、シム(21)の上端面が当接部材(8)を支
持する支持部(22)となされている。シム(21)の
長さは、適切なバルブ・クリアランスをとることができ
るような長さとされる。
The shim (21) is made of cast iron, for example. The upper end surface of the shim (21) serves as a support portion (22) that supports the abutment member (8). The length of the shim (21) is such that appropriate valve clearance can be achieved.

また第4図において、第1図および第2図に示すものと
同一物には同一符号を付して説明を省略する。
Further, in FIG. 4, the same components as those shown in FIGS. 1 and 2 are designated by the same reference numerals, and the description thereof will be omitted.

このようなタペツト(20)を用いる場合、カム(1)
とタペツト(20)との間、当接部材(8)とロツカ・
アーム(3)との間およびロツカ・アーム(3)とバル
ブ(4)のステムとの間のうち少くともいずれか1個所
に適切なバルブ・クリアランスが設定される。図面では
、ロツカ・アーム(3)とバルブ(4)のステムとの間
に設定されている。
When using such a tappet (20), the cam (1)
and the tapepet (20), the abutment member (8) and the rocker
Appropriate valve clearance is provided at least one of between the rocker arm (3) and the stem of the valve (4). In the drawing, it is set between the rocker arm (3) and the stem of the valve (4).

【図面の簡単な説明】[Brief explanation of the drawing]

第1図ないし第3図は従来の油圧タペツトを示し、第1
図はカムのベース部上にあるときの垂直断面図、第2図
はカムのリフト部上にあるときの垂直断面図、第3図は
カムの回転角とバルブ・リフト量を示すグラフ、第4図
はこの発明の実施例を示す垂直断面図である。 (5)…タペツト本体、(8)…ロツカ・アームとの当
接部材、(20)…タペツト、(22)…支持部。 以上 特許出願人 小口博
Figures 1 to 3 show conventional hydraulic tappets.
Figure 2 is a vertical sectional view when the cam is on the base of the cam, Figure 2 is a vertical sectional view when it is on the lift part of the cam, Figure 3 is a graph showing the cam rotation angle and valve lift amount, FIG. 4 is a vertical sectional view showing an embodiment of the present invention. (5) Tappet main body, (8) Abutting member with rocker arm, (20) Tappet, (22) Support portion. Patent applicant: Hiroshi Oguchi

Claims (1)

【特許請求の範囲】[Claims] 有底円筒形タペツト本体(5)と、タペツト本体(5)
内に入れられているロツカ・アームとの当接部材(8)
とよりなり、タペツト本体(5)内の所定高さ位置に当
接部材(8)を支持する支持部(22)が設けられ、支
持部(22)上に当接部材(8)が載せられているエン
ジン用タペツト。
Bottomed cylindrical tappet body (5) and tappet body (5)
Contact member (8) with the Rotsuka arm placed inside
Therefore, a support part (22) for supporting the abutment member (8) is provided at a predetermined height position within the tapepet body (5), and the abutment member (8) is placed on the support part (22). Tappet for the engine.
JP18403883A 1983-10-01 1983-10-01 Tappet for engine Pending JPS6075706A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18403883A JPS6075706A (en) 1983-10-01 1983-10-01 Tappet for engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18403883A JPS6075706A (en) 1983-10-01 1983-10-01 Tappet for engine

Publications (1)

Publication Number Publication Date
JPS6075706A true JPS6075706A (en) 1985-04-30

Family

ID=16146268

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18403883A Pending JPS6075706A (en) 1983-10-01 1983-10-01 Tappet for engine

Country Status (1)

Country Link
JP (1) JPS6075706A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109736915A (en) * 2019-02-28 2019-05-10 天津大学 A kind of diesel engine inlet valve multi-mode time-delay closing system and working method

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5531288A (en) * 1978-04-10 1980-03-05 Naruba K Veb Highhefficiency combustion chamber

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5531288A (en) * 1978-04-10 1980-03-05 Naruba K Veb Highhefficiency combustion chamber

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109736915A (en) * 2019-02-28 2019-05-10 天津大学 A kind of diesel engine inlet valve multi-mode time-delay closing system and working method

Similar Documents

Publication Publication Date Title
EP0030781A1 (en) Hydraulic tappet for direct-acting valve gear
US4590898A (en) Hydraulic tappet for direct-acting valve gear
US4470381A (en) Hydraulic tappet for direct-acting valve gear
US4711207A (en) Valve deactivator mechanism
JPS58150012A (en) Valve device of internal-combustion engine
JP3473065B2 (en) Rocker arm
JPS6075706A (en) Tappet for engine
US4624224A (en) Hydraulic valve lifter
JPS6367001B2 (en)
US2882878A (en) Self-aligning tappet
US20090078224A1 (en) Cam follower rocker arm
JPH0327725B2 (en)
JP3382379B2 (en) Hydraulic lash adjuster
JPS6172809A (en) Push rod guide device for overhead type internal-combustion engine
JPS59162310A (en) Locker arm
JP3288784B2 (en) Hydraulic lash adjuster for internal combustion engine
JPH0350303A (en) Locker arm
JPH0413367Y2 (en)
JPH0350304A (en) Locker arm
JPH0248649Y2 (en)
JPH0326244Y2 (en)
JPH0335484B2 (en)
JPS62182409A (en) Supporting structure for sealed hydraulic rush adjuster
JPH0144721Y2 (en)
JPS6213705A (en) Hydraulic tappet for internal-combustion engine