JPH04318258A - Oil-cooled multi-cylinder engine - Google Patents
Oil-cooled multi-cylinder engineInfo
- Publication number
- JPH04318258A JPH04318258A JP17627291A JP17627291A JPH04318258A JP H04318258 A JPH04318258 A JP H04318258A JP 17627291 A JP17627291 A JP 17627291A JP 17627291 A JP17627291 A JP 17627291A JP H04318258 A JPH04318258 A JP H04318258A
- Authority
- JP
- Japan
- Prior art keywords
- oil
- cylinder
- cylinder liner
- wall surface
- liner
- 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
- 238000001816 cooling Methods 0.000 claims abstract description 16
- 239000000498 cooling water Substances 0.000 abstract description 4
- 238000005553 drilling Methods 0.000 description 3
- 238000003754 machining Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000005461 lubrication Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F1/00—Cylinders; Cylinder heads
- F02F1/02—Cylinders; Cylinder heads having cooling means
- F02F1/10—Cylinders; Cylinder heads having cooling means for liquid cooling
- F02F1/14—Cylinders with means for directing, guiding or distributing liquid stream
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
- Lubrication Of Internal Combustion Engines (AREA)
Abstract
Description
【0001】0001
【産業上の利用分野】本発明は、エンジンのシリンダ部
分をオイルによつて冷却するようにした油冷式多気筒エ
ンジンに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil-cooled multi-cylinder engine in which the cylinder portions of the engine are cooled by oil.
【0002】0002
【従来の技術】車両用デイーゼルエンジン等シリンダラ
イナを具えた多気筒エンジンにおいて、中空円筒状をな
すライナの外壁面に多数の円周溝又は螺旋溝を設け、同
円周溝又は螺旋溝内に冷却用のオイルを流通させるよう
にした油冷式多気筒エンジンが既に提案されている。
(例えば昭和62年実用新案登録願第60967号参照
上記従来の油冷式多気筒エンジンの典型的なシリンダラ
イナ取付構造を、図5及び図6を参照して説明すると、
図中符号1は全体として中空円筒状の形状を有するシリ
ンダライナ、2は同シリンダライナ1が嵌装されるクラ
ンクケース3のシリンダボア部である。上記シリンダラ
イナ1には、シリンダヘツド側の一端部分に半径方向外
方に延在したフランジ部4が形成されると共に、クラン
クケースのボア部2に接する外壁面に多数の円周方向の
油溝5が形成されている。上記円周方向の油溝5には、
シリンダライナ1の外壁面を囲撓する円形又は楕円形の
環状溝及び小さな螺旋角をもつてライナ外壁面に刻設さ
れた螺旋溝の双方が含まれる。上記油溝5はシリンダラ
イナ1の外壁面に、シリンダ軸線方向に延在して形成さ
れた第1及び2の縦油溝6a及び6bによつて相互に連
通され、通常の場合、上記第1及び第2の縦油溝6a及
び6bは図6に良く示されているように、円周方向に1
80度の角度間隔を存して配設されている。上記第1の
縦油溝6aは、クランクケース3の上端付近にクランク
軸線方向即ちシリンダ軸線を含む中心面0−0に対し平
行に延在して穿設されたライナ給油用オイルギヤラリ7
に給油孔8を介して連通されている。上記給油孔8は、
穿孔作業上の便宜から図6に示されているように通常上
記の中心面0−0に対し直角方向に穿設され、従つて同
給油孔8に連通する上記第1及び第2縦油溝6a及び6
bもクランク軸線0−0に略直交する面内に配置される
。また給油孔8の外方開口端は、穿孔後プラグ9によつ
て閉塞される。[Prior Art] In a multi-cylinder engine equipped with a cylinder liner such as a diesel engine for a vehicle, a large number of circumferential grooves or spiral grooves are provided on the outer wall surface of the hollow cylindrical liner. Oil-cooled multi-cylinder engines that circulate cooling oil have already been proposed. (For example, see Utility Model Registration Application No. 60967 of 1988) The typical cylinder liner mounting structure of the above-mentioned conventional oil-cooled multi-cylinder engine will be explained with reference to FIGS. 5 and 6.
In the figure, reference numeral 1 indicates a cylinder liner having a hollow cylindrical shape as a whole, and 2 indicates a cylinder bore portion of a crankcase 3 into which the cylinder liner 1 is fitted. The cylinder liner 1 has a flange portion 4 extending radially outward at one end portion on the cylinder head side, and a number of circumferential oil grooves on the outer wall surface in contact with the bore portion 2 of the crankcase. 5 is formed. In the oil groove 5 in the circumferential direction,
It includes both a circular or elliptical annular groove surrounding the outer wall surface of the cylinder liner 1 and a spiral groove carved into the liner outer wall surface with a small helical angle. The oil grooves 5 are communicated with each other by first and second vertical oil grooves 6a and 6b formed on the outer wall surface of the cylinder liner 1 and extending in the cylinder axial direction. And the second vertical oil grooves 6a and 6b are 1 in the circumferential direction, as clearly shown in FIG.
They are arranged at angular intervals of 80 degrees. The first vertical oil groove 6a is formed by a liner oil supply oil gear lary 7 which is drilled near the upper end of the crankcase 3 and extends in the direction of the crank axis, that is, parallel to the center plane 0-0 including the cylinder axis.
The oil supply hole 8 is connected to the oil supply hole 8. The oil supply hole 8 is
For convenience in drilling operations, the first and second vertical oil grooves are normally drilled in a direction perpendicular to the center plane 0-0, and therefore communicate with the oil supply hole 8, as shown in FIG. 6a and 6
b is also arranged in a plane substantially orthogonal to the crank axis 0-0. Further, the outer opening end of the oil supply hole 8 is closed by a plug 9 after drilling.
【0003】エンジンの運転中、図示しないメインオイ
ルギヤラリ等のオイル供給源から上記給油用オイルギヤ
ラリ7に供給されたオイルが、給油孔8から各シリンダ
ライナ1の第1縦油溝6aに供給され、同縦油溝6aに
連通する多数の円周方向油溝5内に左右に分かれて流入
し、ライナ外周を夫々略半周して第2の縦油溝6bに流
出し、シリンダライナ1を冷却する。この構成では、ピ
ストンが上下死点付近に達したときに加速度の変化によ
つて一方のシリンダライナ内壁面から他方のシリンダラ
イナ内壁面に衝撃的にたたきつけられる所謂ピストンス
ラツプに基づく作用力が、上記第1及び第2縦油溝6a
及び6bを含むシリンダライナ1の弱点面に作用するた
め、シリンダライナ1の耐久性及び信頼性に懸念がある
。During operation of the engine, oil is supplied from an oil supply source such as a main oil gear (not shown) to the oil supply oil gear 7, and is supplied from the oil supply hole 8 to the first vertical oil groove 6a of each cylinder liner 1. , flows into a large number of circumferential oil grooves 5 communicating with the vertical oil groove 6a, flows into the left and right sides, goes approximately half way around the outer circumference of the liner, and flows out into the second vertical oil groove 6b, cooling the cylinder liner 1. do. In this configuration, when the piston reaches the vicinity of the vertical dead center, the acting force based on so-called piston slap, which is applied impactively from the inner wall surface of one cylinder liner to the inner wall surface of the other cylinder liner due to a change in acceleration, is 1 and 2nd vertical oil groove 6a
and 6b, there are concerns about the durability and reliability of the cylinder liner 1.
【0004】0004
【発明が解決しようとする課題】本発明は、従来の油冷
式多気筒エンジンにおける上記問題点に鑑み提案された
もので、シリンダライナ外壁面の円周方向の油溝に冷却
用オイルを供給する上記給油孔の配置に工夫を加えるこ
とによつて、シリンダライナの耐久性及び信頼性を改善
することを目的とするものである。SUMMARY OF THE INVENTION The present invention was proposed in view of the above-mentioned problems in conventional oil-cooled multi-cylinder engines. The purpose of this invention is to improve the durability and reliability of the cylinder liner by making improvements to the arrangement of the oil supply holes.
【0005】[0005]
【課題を解決するための手段】上記目的を達成するため
に、本発明は、外壁面に冷却用のオイルを流通させる多
数の円周方向の油溝を設けると共に同油溝に連通してシ
リンダ軸線方向に延在する縦油溝を設けたシリンダライ
ナを、クランクケースのシリンダボア部に嵌装し、上記
クランクケース内にクランク軸線方向に延在して設けら
れたライナ給油用オイルギヤラリと上記シリンダライナ
の縦油溝とを給油孔を介し連通させたものにおいて、同
給油孔が、シリンダライナのピストンスラツプに基づく
力が作用する内壁面から円周方向に離隔した外壁面に開
口するように配設されていることを特徴とする油冷式多
気筒エンジンを提案するものである。[Means for Solving the Problems] In order to achieve the above object, the present invention provides a plurality of circumferential oil grooves for circulating cooling oil on an outer wall surface and communicates with the oil grooves to form a cylinder. A cylinder liner provided with a vertical oil groove extending in the axial direction is fitted into the cylinder bore portion of the crankcase, and an oil gear lary for liner lubrication provided extending in the crank axial direction within the crankcase and the cylinder liner are provided. in which the vertical oil groove of the cylinder liner is communicated with the oil supply hole through the oil supply hole, and the oil supply hole is arranged so as to open on an outer wall surface that is circumferentially distant from the inner wall surface on which the force based on the piston slap of the cylinder liner acts. This paper proposes an oil-cooled multi-cylinder engine that is characterized by:
【0006】[0006]
【作用】本発明によれば、シリンダライナ外壁面の円周
方向の油溝にライナ冷却用オイルギヤラリからオイルを
供給する上記給油孔が、シリンダライナのピストンスラ
ツプに基づく力が作用するライナ内壁面から円周方向に
離隔した外壁面に開口するように配置されるので、同給
油孔開口に接続するシリンダライナ外壁面の縦油溝を含
む弱点面とピストンスラツプに基づく力の作用面とが一
致せず、シリンダライナの耐久性が向上する。[Operation] According to the present invention, the oil supply hole that supplies oil from the liner cooling oil gear to the oil groove in the circumferential direction of the cylinder liner outer wall surface is circular from the liner inner wall surface on which the force based on the piston slap of the cylinder liner acts. Since the cylinder liner is arranged to open on an outer wall surface separated in the circumferential direction, the weak point surface including the vertical oil groove on the outer wall surface of the cylinder liner connected to the oil supply hole opening does not coincide with the surface on which force is applied due to the piston slap. The durability of the cylinder liner is improved.
【0007】[0007]
【実施例】以下本発明の実施例を図1ないし図4につい
て具体的に説明する。図中符号10はトラツク用の直接
噴射式多気筒デイーゼルエンジンを総括的に示し、12
は同エンジンのクランクケース、14は同クランクケー
ス12の上端に装架されたシリンダヘツド、16は上記
クランクケース12の下端に装着され平面形状が略梯子
型をなす自体周知のラダーフレーム又はアンダフレーム
、18は上記シリンダヘツド14とクランクケース12
とラダーフレーム16とを挿通してシリンダ軸線に平行
に延在しこれらを一体的に緊締する多数のヘツドボルト
、20は上記クランクケース12内に形成されたシリン
ダボア部22内に嵌装され全体として中空円筒状の形状
を有するシリンダライナ、24は同シリンダライナ20
内に嵌装されたピストン、26はその一端小端部を上記
ピストン24に連結されたコネクテイングロツド、28
は同コネクテイングロツド26の他端大端部に連結され
たクランク軸、30は上記クランクケース12の上端付
近にクランク軸線方向に延在して形成され図示しないオ
イルポンプに接続されたライナ給油用オイルギヤラリ、
32は上記クランクケース12のライナ下方部分に隣接
する側壁部分にクランク軸線方向に延在して形成された
メインオイルギヤラリである。Embodiments Examples of the present invention will be described in detail below with reference to FIGS. 1 to 4. In the figure, reference numeral 10 generally indicates a direct injection multi-cylinder diesel engine for trucks, and 12
1 is a crankcase of the engine, 14 is a cylinder head mounted on the upper end of the crankcase 12, and 16 is a well-known ladder frame or underframe that is mounted on the lower end of the crankcase 12 and has a substantially ladder-like planar shape. , 18 are the cylinder head 14 and the crankcase 12.
A large number of head bolts 20 extend parallel to the cylinder axis and tighten them together through the ladder frame 16 and are fitted into the cylinder bore 22 formed in the crankcase 12 and are hollow as a whole. A cylinder liner having a cylindrical shape, 24 is the same cylinder liner 20
A piston 26 fitted therein has a connecting rod 28 whose one small end is connected to the piston 24.
30 is a crankshaft connected to the other large end of the connecting rod 26, and 30 is a liner oil supply extending in the direction of the crank axis near the upper end of the crankcase 12 and connected to an oil pump (not shown). oil gear for
A main oil gear 32 is formed on a side wall portion of the crankcase 12 adjacent to the lower liner portion and extends in the crank axial direction.
【0008】上記シリンダライナ20には、シリンダヘ
ツド14側の端部に、半径方向外方に延在して形成され
たフランジ部34が設けられ、また同フランジ部34を
除く外壁面には、図示の実施例の場合、シリンダ軸線方
向に適宜の間隔を存して多数の円周方向の油溝36が形
成されている。これらの円周方向の油溝36は前記既提
案の発明又は考案例えば実願昭62−60967号に詳
しく開示されているように、ライナ外壁面に略180度
の円周方向の角度間隔を存してシリンダ軸線方向に延在
して形成された第1の縦油溝38a及び第2の縦袖溝3
8bによつて1個以上適数の通路群に区分されている。
図2に良く示されているように、上記ライナ給油用オイ
ルギヤラリ30と上記第1縦油溝38aの上方部分とが
、複数のシリンダの軸線を含む中心面0−0に対し角度
θ(図示の場合は約50度)をなしてシリンダ中心に向
かい穿設された各シリンダ毎の給油孔40によつて接続
されている。上記ライナ給油用オイルギヤラリ30から
給油孔40を経て第1縦油溝38aの上方部分に供給さ
れた冷却用オイルが円周方向左右に分かれて夫々上記円
周溝36内を半周し出口側の第2縦油溝38bに流出す
る。上記通路群が2群以上の場合、第1群の第2縦油溝
38bに流出した冷却用オイルは続いて第2群の入口側
縦油溝に入り、以下同様にして順次下位の群の円周溝3
6内を流れてライナ外壁面の下方部分に設けられたオイ
ル排出口42から直接オイルパン内に流下し、又は図1
に点線で示されているオイル排出用ギヤラリ44に収集
されて上記オイルパン内に流下する。同オイル排出用ギ
ヤラリ44は、上記ライナ給油用オイルギヤラリ30と
同様に、クランクケース12の側壁内にクランク軸線方
向に延在して穿設される。[0008] The cylinder liner 20 is provided with a flange portion 34 extending radially outward at the end thereof on the cylinder head 14 side, and the outer wall surface excluding the flange portion 34 has a In the illustrated embodiment, a large number of circumferential oil grooves 36 are formed at appropriate intervals in the cylinder axis direction. These oil grooves 36 in the circumferential direction have an angular interval of approximately 180 degrees in the circumferential direction on the outer wall surface of the liner, as disclosed in detail in the previously proposed invention or device, for example, in Utility Model Application No. 62-60967. A first vertical oil groove 38a and a second vertical sleeve groove 3 are formed to extend in the cylinder axis direction.
It is divided into one or more appropriate number of passage groups by 8b. As clearly shown in FIG. 2, the liner oil supply oil gear rally 30 and the upper portion of the first vertical oil groove 38a are at an angle θ (as shown in the figure) with respect to the center plane 0-0 including the axes of the plurality of cylinders. The cylinders are connected by oil supply holes 40 for each cylinder, which are bored toward the center of the cylinders at an angle of about 50 degrees. The cooling oil supplied from the liner oil supply oil gear rally 30 to the upper part of the first vertical oil groove 38a through the oil supply hole 40 is divided into left and right sides in the circumferential direction, travels half a turn inside the circumferential groove 36, and passes through the oil supply hole 40 to the upper part of the first vertical oil groove 38a. 2 flows out into the vertical oil groove 38b. If there are two or more passage groups, the cooling oil that has flowed into the second vertical oil groove 38b of the first group then enters the inlet side vertical oil groove of the second group, and in the same way, the cooling oil of the second vertical oil groove 38b of the first group enters the inlet vertical oil groove of the second group. Circumferential groove 3
6 and flow directly into the oil pan from the oil outlet 42 provided in the lower part of the liner outer wall surface, or directly into the oil pan, or
The oil is collected in an oil discharge gear 44 shown by a dotted line and flows down into the oil pan. The oil discharge gear rally 44 is drilled in the side wall of the crankcase 12 so as to extend in the crank axial direction, similarly to the liner oil supply oil gear rally 30 described above.
【0009】またこの実施例では、図3の部分的拡大断
面図に良く示されているように、シリンダライナ20の
フランジ部34、はその下側面34aをクランクケース
12の平らな上面12aに直接当接し、またその上側面
34bは適宜のガスケツト例えばラミネート型の薄いガ
スケツト46を介してシリンダヘツド14の下面に当接
している。なお、図2において、符号48は前記ヘツド
ボルト18が挿通されるボルト孔、50はシリンダボア
部におけるクランクケース12の外壁面を示し、52は
上記給油孔40の外方穿孔端に装着されたプラグである
。Further, in this embodiment, as clearly shown in the partially enlarged cross-sectional view of FIG. The upper surface 34b abuts against the lower surface of the cylinder head 14 via a suitable gasket, such as a thin laminate gasket 46. In FIG. 2, reference numeral 48 indicates a bolt hole through which the head bolt 18 is inserted, 50 indicates an outer wall surface of the crankcase 12 in the cylinder bore portion, and 52 indicates a plug attached to the outer drilling end of the oil supply hole 40. be.
【0010】上記構成において、エンジン10の運転中
、図示しないオイルポンプによつて上記給油用オイルギ
ヤラリ30に供給され、更に給油孔40から複数個のシ
リンダのライナ20の外壁面に夫々形成された第1縦油
溝38aを経て円周溝36内を上述したように流れて同
ライナを冷却したのちオイルパン内に流下する。一方、
シリンダヘツド14の内部には、冷却水室54が設けら
れ(図1参照)、図示しないウオータポンプによつて圧
送された冷却水が、シリンダヘツド14内の上記冷却水
室54内を流れて排気ポートや排気弁等を冷却したのち
ラジエータを経由して再びウオータポンプに還流する。In the above configuration, while the engine 10 is operating, the oil is supplied to the oil supplying oil gear gallery 30 by the oil pump (not shown), and the oil is supplied from the oil supply hole 40 to the oil supply holes 40 formed on the outer wall surfaces of the liners 20 of the plurality of cylinders. The oil flows through the first vertical oil groove 38a and inside the circumferential groove 36 as described above, cools the liner, and then flows down into the oil pan. on the other hand,
A cooling water chamber 54 is provided inside the cylinder head 14 (see FIG. 1), and cooling water pumped by a water pump (not shown) flows through the cooling water chamber 54 inside the cylinder head 14 and is exhausted. After cooling the ports, exhaust valves, etc., the water is returned to the water pump via the radiator.
【0011】さて、上述したように給油孔40が上記中
心面0−0に対し角度θをなしてシリンダ中心に向かい
穿設されており、一方ピストンスラツプに基づく衝撃力
は概ね各シリンダの中心線を含み上記中心面0−0に対
し直角方向のシリンダライナ内壁面に作用するので、上
記給油孔40のシリンダライナ20外壁面に対向する開
口が上記ピストンスラツプに基づく力の作用面から円周
方向に十分離隔し、換言すれば給油孔40に連通する第
1縦油溝38a及び第2縦油溝38bを通るシリンダラ
イナ20の弱点面が上記ピストンスラツプに基づく力の
作用面から遠く離隔することとなる。この結果、シリン
ダライナ20の耐久性及び信頼性が著しく改善される。Now, as mentioned above, the oil supply hole 40 is formed toward the center of the cylinder at an angle θ with respect to the center plane 0-0, and on the other hand, the impact force due to the piston slap generally traverses the center line of each cylinder. Since the force acting on the inner wall surface of the cylinder liner in the direction perpendicular to the center plane 0-0, the opening of the oil supply hole 40 facing the outer wall surface of the cylinder liner 20 is sufficiently circumferentially away from the surface on which the force based on the piston slap acts. In other words, the weak point surface of the cylinder liner 20 passing through the first vertical oil groove 38a and the second vertical oil groove 38b communicating with the oil supply hole 40 is far away from the surface on which the force based on the piston slap is applied. As a result, the durability and reliability of the cylinder liner 20 are significantly improved.
【0012】なお、図示の実施例の場合、図3に良く示
されているように、シリンダライナ20のフランジ部3
4が直接クランクケース上面12aに載置されるので、
図5に示されているように、クランクケース3に設けら
れた座ぐり部3´内にシリンダライナフランジ部4を嵌
装した通常の構造と較べて、クランクケース上面12a
と複数のシリンダのシリンダライナ上面即ちフランジ部
上側面34bとの間の高さの変動が著しく小さくなり、
上記冷却用オイルのシール及びガスシールの性能を効果
的に改善し得る付随的な利点がある。このことは、シリ
ンダライナ20のフランジ部34のシリンダ軸線方向の
寸度及びクランクケース上面12aの平面加工の誤差に
較べて、図5における座ぐり部3´の深さ方向の加工精
度が通常著しく低いという事実に基づくものである。更
に、図示の実施例では、シリンダライナ20のフランジ
部34を受容する座ぐり部をクランクケース12に加工
する必要がないので、座ぐり加工費に相応した加工コス
トの低減を達成し得ることは自明である。In the case of the illustrated embodiment, the flange portion 3 of the cylinder liner 20 is
4 is placed directly on the crankcase upper surface 12a,
As shown in FIG. 5, compared to the normal structure in which the cylinder liner flange part 4 is fitted into the counterbore part 3' provided in the crankcase 3, the crankcase upper surface 12a
and the cylinder liner upper surface of the plurality of cylinders, that is, the flange portion upper surface 34b, the fluctuation in height is significantly reduced,
There are additional benefits that can effectively improve the performance of the cooling oil seal and gas seal. This means that the machining accuracy in the depth direction of the counterbore portion 3' in FIG. This is based on the fact that it is low. Furthermore, in the illustrated embodiment, there is no need to machine a counterbore part for receiving the flange part 34 of the cylinder liner 20 into the crankcase 12, so it is possible to reduce the machining cost commensurate with the counterbore machining cost. It's self-evident.
【0013】なおまた、上記実施例では、シリンダライ
ナ20の外壁面に冷却用オイルを流通させる円周溝36
が設けられているが、シリンダライナ20の外壁面に螺
旋溝を設けた場合にも勿論本発明を適用することができ
る。更に本発明は、上記円周溝又は螺旋溝を、シリンダ
ライナ各部分の熱負荷に応じ部分的に断面積を変化させ
或いは配置間隔を変更する等、冷却用オイルの流通パタ
ーンを種々変化させたすべてのオイル冷却式ライナを有
するエンジンに広く適用することができる。Furthermore, in the above embodiment, the circumferential groove 36 for circulating the cooling oil is formed on the outer wall surface of the cylinder liner 20.
However, the present invention can of course be applied to a case where a spiral groove is provided on the outer wall surface of the cylinder liner 20. Further, in the present invention, the circulation pattern of the cooling oil is changed in various ways, such as by partially changing the cross-sectional area or changing the arrangement interval of the circumferential groove or the spiral groove according to the heat load on each part of the cylinder liner. Can be widely applied to all engines with oil-cooled liners.
【0004】0004
【発明の効果】叙上のように、本発明に係る油冷式多気
筒エンジンは、外壁面に冷却用のオイルを流通させる多
数の円周方向の油溝を設けると共に同油溝に連通してシ
リンダ軸線方向に延在する縦油溝を設けたシリンダライ
ナを、クランクケースのシリンダボア部に嵌装し、上記
クランクケース内にクランク軸線方向に延在して設けら
れたライナ給油用オイルギヤラリと上記シリンダライナ
の縦油溝とを給油孔を介し連通させたものにおいて、同
給油孔が、シリンダライナのピストンスラツプに基づく
力が作用する内壁面から円周方向に離隔した外壁面に開
口するように配設されていることを特徴とし、外壁面に
冷却用オイルを流通させるための多数の油溝を具えたシ
リンダライナの耐久性及び信頼性を向上することができ
るので、産業上有益である。Effects of the Invention As described above, the oil-cooled multi-cylinder engine according to the present invention has a large number of circumferential oil grooves for circulating cooling oil on the outer wall surface, and communicates with the oil grooves. A cylinder liner provided with a vertical oil groove extending in the direction of the cylinder axis is fitted into the cylinder bore of the crankcase, and an oil gear lubricant for liner lubrication provided extending in the direction of the crankshaft is provided in the crankcase, and the above The vertical oil groove of the cylinder liner is communicated with the oil supply hole through the oil supply hole, and the oil supply hole is arranged to open on the outer wall surface that is circumferentially distant from the inner wall surface on which the force based on the piston slap of the cylinder liner acts. This feature is industrially useful because it can improve the durability and reliability of a cylinder liner that has a large number of oil grooves for circulating cooling oil on its outer wall surface.
【図1】本発明の一実施例を示す横断面図である。FIG. 1 is a cross-sectional view showing one embodiment of the present invention.
【図2】図1に示したエンジンのクランクケース上面の
平面図である。FIG. 2 is a plan view of the upper surface of the crankcase of the engine shown in FIG. 1;
【図3】図1に示したエンジンのシリンダライナ取付部
分の拡大断面図である。FIG. 3 is an enlarged sectional view of the cylinder liner attachment portion of the engine shown in FIG. 1;
【図4】図3のIV−IV線に沿う断面図を含むシリン
ダライナの部分的な平面図である。FIG. 4 is a partial plan view of the cylinder liner including a cross-sectional view taken along line IV-IV in FIG. 3;
【図5】従前の油冷式エンジンにおけるシリンダライナ
取付部分の拡大断面図である。FIG. 5 is an enlarged sectional view of a cylinder liner attachment portion in a conventional oil-cooled engine.
【図6】従前のエンジンのシリンダ軸線に直交する面(
図5のVI−VI線に相当する)に沿う横断面図である
。[Figure 6] A plane perpendicular to the cylinder axis of a conventional engine (
6 is a cross-sectional view taken along line VI-VI in FIG. 5. FIG.
10 多気筒エンジン
12 クランクケース
14 シリンダヘツド
16 ラダーフレーム
20 シリンダライナ
30 ライナ給油用オイルギヤラリ36
円周方向の油溝
38a及び38b 縦油溝
40 給油孔10 Multi-cylinder engine 12 Crank case 14 Cylinder head 16 Ladder frame 20 Cylinder liner 30 Oil gear for liner oil supply 36
Circumferential oil grooves 38a and 38b Vertical oil groove 40 Oil supply hole
Claims (1)
多数の円周方向の油溝を設けると共に同油溝に連通して
シリンダ軸線方向に延在する縦油溝を設けたシリンダラ
イナを、クランクケースのシリンダボア部に嵌装し、上
記クランクケース内にクランク軸線方向に延在して設け
られたライナ給油用オイルギヤラリと上記シリンダライ
ナの縦油溝とを給油孔を介し連通させたものにおいて、
同給油孔が、シリンダライナのピストンスラツプに基づ
く力が作用する内壁面から円周方向に離隔した外壁面に
開口するように配設されていることを特徴とする油冷式
多気筒エンジン1. A cylinder liner having a plurality of circumferential oil grooves for circulating cooling oil on an outer wall surface and a vertical oil groove communicating with the oil grooves and extending in the cylinder axial direction, A liner oil supply oil gear fitting fitted into a cylinder bore of a crankcase and extending in the crank axial direction within the crankcase communicates with a vertical oil groove of the cylinder liner through an oil supply hole,
An oil-cooled multi-cylinder engine characterized in that the oil supply hole is arranged so as to open in an outer wall surface that is circumferentially distant from the inner wall surface on which a force based on the piston slap of the cylinder liner acts.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP03176272A JP3142149B2 (en) | 1991-04-16 | 1991-04-16 | Oil-cooled multi-cylinder engine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP03176272A JP3142149B2 (en) | 1991-04-16 | 1991-04-16 | Oil-cooled multi-cylinder engine |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH04318258A true JPH04318258A (en) | 1992-11-09 |
JP3142149B2 JP3142149B2 (en) | 2001-03-07 |
Family
ID=16010676
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP03176272A Expired - Fee Related JP3142149B2 (en) | 1991-04-16 | 1991-04-16 | Oil-cooled multi-cylinder engine |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3142149B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106988922A (en) * | 2017-03-29 | 2017-07-28 | 江苏常发农业装备股份有限公司 | A kind of single-cylinder air-cooled diesel engine |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5987392A (en) * | 1982-09-15 | 1984-05-19 | シーメンス、アクチエンゲゼルシヤフト | Spherical steel container of reactor facility |
JPS61195957A (en) * | 1985-02-25 | 1986-08-30 | ブラツシユ ウエルマン,インコ−ポレイテツド | Production of copper alloy and produced copper alloy |
JPS63171642U (en) * | 1987-04-30 | 1988-11-08 | ||
JPH0378518A (en) * | 1989-08-18 | 1991-04-03 | Mitsubishi Motors Corp | Cooling structure for engine |
-
1991
- 1991-04-16 JP JP03176272A patent/JP3142149B2/en not_active Expired - Fee Related
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5987392A (en) * | 1982-09-15 | 1984-05-19 | シーメンス、アクチエンゲゼルシヤフト | Spherical steel container of reactor facility |
JPS61195957A (en) * | 1985-02-25 | 1986-08-30 | ブラツシユ ウエルマン,インコ−ポレイテツド | Production of copper alloy and produced copper alloy |
JPS63171642U (en) * | 1987-04-30 | 1988-11-08 | ||
JPH0378518A (en) * | 1989-08-18 | 1991-04-03 | Mitsubishi Motors Corp | Cooling structure for engine |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106988922A (en) * | 2017-03-29 | 2017-07-28 | 江苏常发农业装备股份有限公司 | A kind of single-cylinder air-cooled diesel engine |
Also Published As
Publication number | Publication date |
---|---|
JP3142149B2 (en) | 2001-03-07 |
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