JPH04287855A - Cooling device for internal combustion engine - Google Patents
Cooling device for internal combustion engineInfo
- Publication number
- JPH04287855A JPH04287855A JP5170191A JP5170191A JPH04287855A JP H04287855 A JPH04287855 A JP H04287855A JP 5170191 A JP5170191 A JP 5170191A JP 5170191 A JP5170191 A JP 5170191A JP H04287855 A JPH04287855 A JP H04287855A
- Authority
- JP
- Japan
- Prior art keywords
- refrigerant
- groove
- pump
- cylinder
- filter
- 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
- 238000001816 cooling Methods 0.000 title claims abstract description 31
- 238000002485 combustion reaction Methods 0.000 title claims description 13
- 239000003507 refrigerant Substances 0.000 claims abstract description 64
- 239000002826 coolant Substances 0.000 claims 2
- 238000005461 lubrication Methods 0.000 description 4
- 239000010687 lubricating oil Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000010408 film Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Abstract
Description
【0001】0001
【産業上の利用分野】本発明は内燃機関のシリンダを冷
却する内燃機関の冷却装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an internal combustion engine cooling system for cooling cylinders of an internal combustion engine.
【0002】0002
【従来の技術】従来より実開昭63−168242号に
記載の如く、シリンダライナ外周に螺施状又は環状の冷
却溝を設けて冷媒を流し、内燃機関の冷却を行なう冷却
装置がある。2. Description of the Related Art Conventionally, as described in Japanese Utility Model Application Laid-Open No. 63-168242, there has been a cooling system that cools an internal combustion engine by providing a spiral or annular cooling groove on the outer periphery of a cylinder liner to allow a refrigerant to flow therethrough.
【0003】図2(A),(B),(C)夫々は従来の
シリンダライナの一例の平面図、正面図、側面図を示す
。同図中、シンリダライナ10の外周には等間隔で環状
冷却溝11が形成されている。また、全ての環状冷却溝
11は軸方向に形成された連通路12,13により連通
されている。流入口14から流入する冷媒は連通路12
を通って各環状冷却溝11に分配され、連通路13を通
って流出口15から流出する。FIGS. 2A, 2B, and 2C show a plan view, a front view, and a side view of an example of a conventional cylinder liner, respectively. In the figure, annular cooling grooves 11 are formed at equal intervals on the outer periphery of a thin linear liner 10. Further, all the annular cooling grooves 11 are communicated with each other through communicating passages 12 and 13 formed in the axial direction. The refrigerant flowing in from the inlet 14 flows through the communication path 12
It is distributed to each annular cooling groove 11 through the communication passage 13 and flows out from the outlet 15.
【0004】0004
【発明が解決しようとする課題】上記の冷却装置で、冷
媒中のごみ又は水あか等が環状冷却溝11又は連通路1
2につまるのを防止するためには冷媒をフィルタを通し
て流入口14に供給することが考えられる。[Problem to be Solved by the Invention] In the above-mentioned cooling device, dirt or water scale in the refrigerant is removed from the annular cooling groove 11 or the communication path 1.
In order to prevent the refrigerant from clogging the refrigerant 2, it is conceivable to supply the refrigerant to the inlet 14 through a filter.
【0005】しかし、冷媒を全量フィルタに通すと冷媒
の圧力損失が大きくなり、ポンプの駆動損失も増大し、
冷却装置の冷媒流量が減少し、冷却能力が低下するとい
う問題があった。However, when all of the refrigerant passes through a filter, the pressure loss of the refrigerant becomes large, and the drive loss of the pump also increases.
There was a problem in that the refrigerant flow rate of the cooling device decreased, resulting in a decrease in cooling capacity.
【0006】本発明は上記の点に鑑みなされたもので、
シリンダライナ上部側の溝状冷媒通路にのみフィルタを
通して冷媒を供給することにより、冷却性能が要求され
る上部側の溝状冷媒通路がつまることを防止すると共に
、冷媒の不必要な圧力損失の増加を防止する内燃機関の
冷却装置を提供することを目的とする。[0006] The present invention has been made in view of the above points.
By supplying refrigerant through a filter only to the groove-shaped refrigerant passage on the upper side of the cylinder liner, the groove-shaped refrigerant passage on the upper side where cooling performance is required is prevented from clogging, and unnecessary pressure loss of the refrigerant is increased. An object of the present invention is to provide a cooling device for an internal combustion engine that prevents the above.
【0007】[0007]
【課題を解決するための手段】上記課題を解決するため
に、本発明では、シンリダライナの外周に複数の溝状冷
媒通路を形成してシリンダライナの冷却を行なう内燃機
関の冷却装置において、複数の溝状冷媒通路をシリンダ
ライナの軸方向上の燃焼室に近い上部側と下部側とで夫
々独立させ、上部側の溝状冷媒通路にはポンプよりフィ
ルタを通して冷媒を供給し、下部側の溝状冷媒通路には
ポンプより直接冷媒を供給する。[Means for Solving the Problems] In order to solve the above problems, the present invention provides a cooling system for an internal combustion engine that cools a cylinder liner by forming a plurality of groove-shaped refrigerant passages on the outer periphery of a cylinder liner. The groove-shaped refrigerant passages are made independent on the upper side and lower side near the combustion chamber in the axial direction of the cylinder liner, and refrigerant is supplied from the pump through a filter to the upper groove-shaped refrigerant passage, and the groove-shaped passages on the lower side are separated. Refrigerant is supplied directly to the refrigerant passage from a pump.
【0008】[0008]
【作用】本発明においては、上部側の溝状冷媒通路には
フィルタを通じて冷媒を供給することにより冷却性能が
要求される上部側の溝状冷媒路がつまることを防止でき
、また下部側の溝状冷媒通路にはフィルタを通さず直接
冷媒を供給することにより、冷媒の圧力損失が増加する
ことを防止している。[Function] In the present invention, by supplying refrigerant to the upper groove-shaped refrigerant passage through a filter, it is possible to prevent the upper groove-shaped refrigerant passage, which requires cooling performance, from clogging, and also to prevent the upper groove-shaped refrigerant passage, which requires cooling performance, from clogging. By supplying the refrigerant directly to the shaped refrigerant passage without passing it through a filter, the pressure loss of the refrigerant is prevented from increasing.
【0009】[0009]
【実施例】図1は本発明の内燃機関の冷却装置の一実施
例の断面構造図を示す。DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a sectional view of an embodiment of a cooling system for an internal combustion engine according to the present invention.
【0010】同図中、20はシリンダライナであり、シ
リンダライナ20の外周には軸方向に略等間隔で環状冷
却溝211 〜216 が形成されている。In the figure, 20 is a cylinder liner, and annular cooling grooves 211 to 216 are formed on the outer periphery of the cylinder liner 20 at approximately equal intervals in the axial direction.
【0011】このシリンダライナ20はシリンダブロッ
ク22に形成されたボア内に挿入される。ボア内周面2
3の回転角度180度の位置には軸方向に延在する連通
溝24a,24bと25a,25bとが設けられており
、連通溝24aと24b,25aと25bは夫々延長上
にあるが、分離壁26,27夫々によって分離されてい
る。また、シリンダブロック22には連通溝24a,2
4b夫々に連通した流入口28a,28bと連通溝25
a,25b夫々に連通した流出口29a,29bとが形
成されている。シリンダライナ20をボア内に挿入した
ときシリンダライナ20の外周面20aはボア内周面2
3の連通溝24a,24b,25a,25bを除く略全
面に当接する。また、シリンダライナ20の環状冷却溝
213 ,214 間の外周面20aには分離壁26,
27夫々と当接する。[0011] This cylinder liner 20 is inserted into a bore formed in a cylinder block 22. Bore inner circumferential surface 2
3, communication grooves 24a, 24b and 25a, 25b extending in the axial direction are provided at positions at a rotation angle of 180 degrees. They are separated by walls 26 and 27, respectively. Further, the cylinder block 22 has communication grooves 24a, 2
Inflow ports 28a, 28b and communication groove 25 that communicate with each other
Outlets 29a and 29b are formed which communicate with a and 25b, respectively. When the cylinder liner 20 is inserted into the bore, the outer peripheral surface 20a of the cylinder liner 20 is the inner peripheral surface 2 of the bore.
It abuts substantially the entire surface except for the communication grooves 24a, 24b, 25a, and 25b of No. 3. Furthermore, a separation wall 26,
27 come into contact with each other.
【0012】冷媒圧送用のポンプ30は冷媒を2分岐し
て送出し、一方は冷媒圧力を大としてフィルタ31を通
して流入口28aに供給4され、また他方は冷媒圧力を
小として直接流入口28bに供給される。流入口28a
に供給される冷媒は連通溝24aを通ってシリンダ上部
環状冷却溝211 〜213に分配され、連通溝25a
を通って流出口29aから流出する。流入口28bに供
給される冷媒は連通溝24bを通ってシリンダ下部の環
状冷却溝214 〜216 に分配され、連通溝25b
を通って流出口29bから流出する。流出口29a,2
9bから流出した冷媒は合流されラジエータ(図示せず
)を通してポンプ30に循環される。The refrigerant pump 30 divides the refrigerant into two parts and sends the refrigerant into two branches, one of which is supplied to the inlet 28a through the filter 31 with a high refrigerant pressure, and the other is supplied directly to the inlet 28b with a low refrigerant pressure. Supplied. Inflow port 28a
The refrigerant is distributed to the cylinder upper annular cooling grooves 211 to 213 through the communication groove 24a, and is distributed to the cylinder upper annular cooling grooves 211 to 213 through the communication groove 25a.
It passes through and flows out from the outlet 29a. The refrigerant supplied to the inlet 28b passes through the communication groove 24b and is distributed to the annular cooling grooves 214 to 216 at the bottom of the cylinder.
It flows out through the outlet 29b. Outlet 29a, 2
The refrigerant flowing out from 9b is combined and circulated to pump 30 through a radiator (not shown).
【0013】このように、燃焼室に近く冷却性能が要求
されるシリンダ上部の環状冷却溝211 〜213 に
はフィルタ31を通して冷媒が供給されるため環状冷却
溝211 〜213 及び連通溝24a,25aのつま
るのを防止でき、また冷媒圧力が大とされているため、
シリンダライナ20の内周面と図示しないピストンの摺
動部についての潤滑を考えると潤滑油の温度が低く膜厚
の厚い境界潤滑を行なうことができる。また、シリンダ
下部の環状冷却溝214 〜216 にはフィルタを通
さないで冷媒が供給されるため不必要に冷媒の圧力損失
を増加させることがなく、冷媒圧力が小とされているた
め、上記ピストンの摺動部の潤滑については潤滑油の温
度が高く膜厚の薄い流体潤滑を行なうことができる。In this way, the refrigerant is supplied through the filter 31 to the annular cooling grooves 211 to 213 in the upper part of the cylinder, which are close to the combustion chamber and require good cooling performance. It can prevent clogging, and the refrigerant pressure is said to be high, so
Considering the lubrication of the inner circumferential surface of the cylinder liner 20 and the sliding parts of the piston (not shown), boundary lubrication with a low lubricating oil temperature and a thick film can be performed. In addition, since the refrigerant is supplied to the annular cooling grooves 214 to 216 at the bottom of the cylinder without passing through a filter, the pressure loss of the refrigerant is not increased unnecessarily, and the refrigerant pressure is small, so that the piston Regarding the lubrication of the sliding parts, fluid lubrication with a high lubricating oil temperature and a thin film thickness can be performed.
【0014】[0014]
【発明の効果】上述の如く、本発明の内燃機関の冷却装
置によれば、シリンダライナ上部側の溝状冷媒通路にの
みフィルタを通して冷媒を供給することにより、冷媒性
能が要求される上部側の溝状冷媒通路がつまることを防
止すると共に、冷媒の不必要な圧力損失の増加を防止す
ることができ、実用上きわめて有用である。As described above, according to the cooling system for an internal combustion engine of the present invention, by supplying refrigerant through the filter only to the groove-shaped refrigerant passages on the upper side of the cylinder liner, the refrigerant can be cooled in the upper part where refrigerant performance is required. This is extremely useful in practice since it is possible to prevent the groove-shaped refrigerant passages from clogging and also to prevent an unnecessary increase in pressure loss of the refrigerant.
【図1】本発明装置の一実施例の断面構造図である。FIG. 1 is a cross-sectional structural diagram of an embodiment of the device of the present invention.
【図2】従来装置の一例の平面図,正面図,側面図であ
る。FIG. 2 is a plan view, a front view, and a side view of an example of a conventional device.
20 シリンダライナ
211 〜216 環状冷却溝
22 シリンダブロック
24a,24b,25a,25b 連通溝28a,2
8b 流入口
29a,29b 流出口
30 ポンプ
31 フィルタ20 Cylinder liners 211 to 216 Annular cooling groove 22 Cylinder blocks 24a, 24b, 25a, 25b Communication grooves 28a, 2
8b Inlet 29a, 29b Outlet 30 Pump 31 Filter
Claims (1)
媒通路を形成してシリンダライナの冷却を行なう内燃機
関の冷却装置において、該複数の溝状冷媒通路を該シリ
ンダライナの軸方向上の燃焼室に近い上部側と下部側と
で夫々独立させ、該上部側の溝状冷媒通路にはポンプよ
りフィルタを通して冷媒を供給し、該下部側の溝状冷媒
通路にはポンプより直接冷媒を供給することを特徴とす
る内燃機関の冷却装置。1. A cooling device for an internal combustion engine that cools the cylinder liner by forming a plurality of groove-shaped coolant passages on the outer periphery of the cylinder liner, wherein the plurality of groove-shaped coolant passages are used for combustion in the axial direction of the cylinder liner. The upper side and lower side near the room are separated, and the refrigerant is supplied from a pump through a filter to the groove-shaped refrigerant passage on the upper side, and the refrigerant is directly supplied from the pump to the groove-shaped refrigerant passage on the lower side. A cooling device for an internal combustion engine characterized by:
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5170191A JPH04287855A (en) | 1991-03-15 | 1991-03-15 | Cooling device for internal combustion engine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5170191A JPH04287855A (en) | 1991-03-15 | 1991-03-15 | Cooling device for internal combustion engine |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH04287855A true JPH04287855A (en) | 1992-10-13 |
Family
ID=12894204
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5170191A Pending JPH04287855A (en) | 1991-03-15 | 1991-03-15 | Cooling device for internal combustion engine |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH04287855A (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 |
-
1991
- 1991-03-15 JP JP5170191A patent/JPH04287855A/en active Pending
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 |
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