KR19980024662A - Cylinder block structure of insolvent diesel engine - Google Patents

Cylinder block structure of insolvent diesel engine Download PDF

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Publication number
KR19980024662A
KR19980024662A KR1019970047368A KR19970047368A KR19980024662A KR 19980024662 A KR19980024662 A KR 19980024662A KR 1019970047368 A KR1019970047368 A KR 1019970047368A KR 19970047368 A KR19970047368 A KR 19970047368A KR 19980024662 A KR19980024662 A KR 19980024662A
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South Korea
Prior art keywords
cylinder
cylinder block
diesel engine
thin
upper deck
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KR1019970047368A
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Korean (ko)
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토시히로 카미무라
유지 타오자키
시게미 오카다
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헨리·디·지·워레스
마쯔다 가부시기가이샤
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Publication of KR19980024662A publication Critical patent/KR19980024662A/en

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    • 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
    • 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 
    • F02F1/004—Cylinder liners
    • 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 
    • F02F1/24—Cylinder heads
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B3/00—Engines characterised by air compression and subsequent fuel addition
    • F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

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  • 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)

Abstract

본 발명은 부실을 구비한 디젤엔진의 실린더블록구조에 관한 것으로서, 위쪽의 부실의 배치에 따르는 상부덱부분의 열부하를 경감하면서 전체로서 가스밀봉성을 확보하는 것을 과제로 한 것이며, 그 해결수단으로서, 각기통의 내경(bore)(10)이 개구하는 내경둘레가장자리부에 물재킷(12)을 가지고, 그 내경둘레가장자리부의 위쪽에 부실(4)이 배치된 실린더블록(1)에 있어서, 상기 물재킷(12)에 있어서의 부실(4)아래쪽부분의 천장높이를 다른 부위의 그것에 대해서 높게 설정하고, 상부덱(1a)의 두께를 얇게한 얇은두께부분(20)을 형성해서 이루어진 것을 특징으로 한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cylinder block structure of a diesel engine having a failure chamber, and aims to secure gas sealing as a whole while reducing the heat load of the upper deck portion due to the arrangement of the upper failure chamber. In the cylinder block (1) having a water jacket (12) in the inner peripheral edge of the opening (bore) 10 of each cylinder, and the subsidiary chamber (4) is arranged above the inner diameter peripheral edge, The ceiling height of the lower part of the lower part of the water jacket 12 in the water jacket 12 is set higher than that of the other parts, and the thin part 20 is formed by thinning the thickness of the upper deck 1a. It is.

Description

부실식 디젤엔진의 실린더블록구조Cylinder block structure of insolvent diesel engine

본 발명은, 부실을 구비한 디젤엔진의 실린더블록구조에 관한 것이다.The present invention relates to a cylinder block structure of a diesel engine provided with a failure chamber.

종래부터, 부실식 디젤엔진에 있어서는, 실린더블록에 각기통의 내경이 개구되고, 내경의 둘레가장자리부에는 냉각용의 물재킷이 형성되고, 한편, 상기 실린더블록의 상부덱위에는 실린더헤드가 헤드볼트에 의해서 체결되고, 이 실린더헤드에는 상기 실린더블록의 내경둘레가장자리부의 위쪽에 부실이 배치되고, 이 부실의 압축공기에 연료가 분사되고, 연소가스를 주연소실에 분출하도록 하고 있다.Conventionally, in an insolvent diesel engine, the inner diameter of each cylinder is opened in a cylinder block, the water jacket for cooling is formed in the peripheral part of an inner diameter, and the cylinder head is a head bolt on the upper deck of the cylinder block. The cylinder head is fastened to an upper portion of the cylinder block by the inner circumferential edge of the cylinder block, fuel is injected into the compressed air of the secondary chamber, and the combustion gas is blown into the main combustion chamber.

그리고, 상기 부실의 배치부분은, 이 부실내에서의 연소 및 연소가스의 분출에 따라서, 그 주변은 특히 고온으로 되어서 열부하가 증대하기 때문에, 이 부분에서의 열변형 기타에 의해서 실린더블록의 상부덱과 실린더헤드간의 가스밀봉성이 저하하지 않도록 가스킷의 구조를 변경하거나, 실린더블록의 상부덱부분의 두께를 변경하도록한 기술이, 일본국 실공소 63-50440호에 개시되어 있다.Since the arranging portion of the sub-chamber has a high heat load due to a particularly high temperature in the periphery thereof due to combustion and combustion gas in the sub-chamber, the upper deck of the cylinder block due to heat deformation in this portion, etc. The technique which changes the structure of a gasket or changes the thickness of the upper deck part of a cylinder block so that the gastightness between a cylinder and a cylinder head may not fall is disclosed by Japanese Unexamined-Japanese-Patent No. 63-50440.

그러나, 밀봉성향상을 위하여 실린더블록의 상부덱에 두께를 두껍게 하는 것은, 물재킷에 의한 냉각성능이 저하하게 되고, 피스톤에 대한 열부하가 증대하고, 상부링의 위치가 상부덱의 두께에 대응하여 낮은 위치로 되어서 압축시의 데드볼륨이 증대하여, 출력성능향상의 장해가 된다.However, thickening the thickness of the upper deck of the cylinder block to improve the sealing performance, the cooling performance by the water jacket is reduced, the heat load on the piston increases, the position of the upper ring corresponding to the thickness of the upper deck The lower position increases the dead volume during compression, which impedes the improvement of output performance.

한편, 냉각성능을 향상시키기 위하여 상부덱의 두께를 얇게하면, 열부하는 저감이나 강성(剛性)이 저하하여, 헤드볼트의 체결력에 따른 가스킷에 대한 면압(面壓)이 내경둘레가장자리부에서 불균일하게 되어서 국부적으로 저하되어, 밀봉성이 저하하는 문제가 있다.On the other hand, if the thickness of the upper deck is made thin in order to improve the cooling performance, the heat load is reduced or the rigidity is reduced, and the surface pressure with respect to the gasket due to the clamping force of the head bolt is unevenly at the edge of the inner diameter. There is a problem in that it is locally lowered and the sealing property is lowered.

그래서 본 발명은 상기 사정에 비추어, 부실의 배치에 따르는 열부하를 경감하면서 가스밀봉성을 확보하도록한 부실식 디젤엔진의 실린더블록구조를 제공할려고 하는 것이다.Therefore, in view of the above circumstances, it is an object of the present invention to provide a cylinder block structure of a failure type diesel engine that ensures gas sealing while reducing heat load caused by the placement of the failure portion.

도 1은 본 발명의 하나의 실시형태에 의한 직렬 4기통디젤엔진의 실린더블록의 상부덱의 평면도1 is a plan view of an upper deck of a cylinder block of a series four-cylinder diesel engine according to one embodiment of the present invention;

도 2는 부실식 디젤엔진의 요부단면도2 is a sectional view of main parts of the insolvent diesel engine;

도 3은 도 1에 있어서의 X-X선을 따르는 실린더블록의 상부덱부분의 단면도3 is a cross-sectional view of the upper deck portion of the cylinder block along the X-X line in FIG.

*도면의 주요부분에 대한 부호의 설명** Description of the symbols for the main parts of the drawings *

E : 디젤엔진1 : 실린더블록E: Diesel engine 1: cylinder block

1a : 상부덱2 : 실린더헤드1a: upper deck 2: cylinder head

3 : 가스킷4 : 부실(副室)3: gasket 4: insolvent

6 : 피스톤7 : 상부링6: piston 7: upper ring

8 : 흡기포트9 : 배기포트8: intake port 9: exhaust port

10 : 내경(bore)12 : 물재킷10: bore 12: water jacket

15 : 헤드볼트구멍17 : 크로스드릴(cross drill)구멍15: head bolt hole 17: cross drill hole

20 : 얇은두께부분C1~C4: 기통20: thin thickness part C 1 ~ C 4 : cylinder

상기 과제를 해결한 본 발명의 실린더블록구조는, 내경둘레가장자리부의 위쪽에 부실이 배치된 부실식 디젤엔진에 있어서, 상기 내경둘레가장자리부의 물재킷에 있어서의 부실아래쪽부분의 천장높이를 다른 부위의 그것에 대해서 높게 설정하고, 상부덱두께를 얇게한 얇은두께부분을 형성한 것을 특징으로 한 것이다.In the cylinder block structure of the present invention which solves the above problems, in the subsidiary diesel engine in which the subsidiary chamber is disposed above the inner diameter peripheral part, the ceiling height of the lower part of the subsidiary part in the water jacket of the inner diameter peripheral part is different. It is set high about it, and formed the thin thickness part which thinned the upper deck thickness.

또, 직렬로 각기통을 배치하고, 각 내경의 주위에 4개의 헤드볼트가 위치하고, 기통렬방향에 있어서의 헤드볼트사이의 내경둘레가장자리부의 위쪽에 부실을 배치하고, 이 부실아래쪽의 상부덱을 얇게 형성해서 얇은두께부분을 형성하는 것이 썩 알맞는다.In addition, each cylinder is arranged in series, and four head bolts are positioned around each inner diameter, and an inferior thread is disposed above the inner diameter peripheral portion between the head bolts in the column alignment direction, and the upper deck under this insufficiency is placed. It is suitable to form a thin layer by forming a thin layer.

또한, 단부기통의 얇은 두께부분의 형성범위를 다른 기통의 얇은 두께부분의 형성범위보다 좁게 하는 것이 바람직하다. 특히 실린더블록의 일단부에 위치하는 동시에 단부쪽에 흡기포트가 위치하는 기통이고, 상기 얇은두께부분의 형성범위를 다른 기통의 얇은두께부분의 형성범위보다 좁게하는 것이 바람직하다.In addition, it is preferable to make the formation range of the thin thickness portion of the end cylinder narrower than the formation range of the thin thickness portion of the other cylinder. In particular, it is a cylinder which is located at one end of the cylinder block and at the same time an intake port is located at the end side, and it is preferable to narrow the formation range of the thin thickness portion than the formation range of the thin thickness portion of the other cylinder.

기통렬에 있어서의 내경사이에, 양쪽의 물재킷을 연통하는 크로스드릴구멍을 형성하는 것이 썩 알맞는다.It is suitable to form a cross-drilled hole for communicating both water jackets between the inner diameters in the gas column.

이하, 도면에 표시한 하나의 실시형태에 의거해서 본 발명을 상세히 설명한다. 도 1은 직렬 4기통디젤엔진의 실린더블록의 상부덱의 평면도, 도 2는 부실식디젤엔진의 요부단면도이다.EMBODIMENT OF THE INVENTION Hereinafter, this invention is demonstrated in detail based on one Embodiment shown in drawing. 1 is a plan view of an upper deck of a cylinder block of a series four-cylinder diesel engine, and FIG. 2 is a cross-sectional view of main parts of a stale diesel engine.

디젤엔진(E)는, 실린더블록(1)의 상부덱(1a)위에 실린더헤드(2)가, 헤드볼트(도시생략)의 조임에 의해서 가스킷(3)을 개재해서 체결되어 있다.In the diesel engine E, the cylinder head 2 is fastened on the upper deck 1a of the cylinder block 1 via the gasket 3 by tightening a head bolt (not shown).

상기 실린더블록(1)에는, 제 1~제 4기통C1~C4의 각 내경(10)이 개구되고, 이 내경(10)의 둘레가장자리부에는 측벽(11)과의 사이에 물재킷(12)이 형성되고, 냉각수가 순환된다. 또, 상기 상부덱(1a)에는, 물재킷(12)에 연통하는 연통구멍(13)이 개구되고, 실린더헤드(2)쪽에 냉각수가 순환하도록 형성된다. 그리고, 상기 각 내경(10)에는 피스톤(6)이 슬라이딩자재하게 끼워넣어지고, 이 피스톤(6)에은 상부링(7)이 장착되어 있다.Each of the inner diameters 10 of the first to the fourth cylinders C 1 to C 4 is opened in the cylinder block 1, and a water jacket (a) between the side walls 11 is formed at a peripheral edge of the inner diameter 10. 12) is formed, and the coolant is circulated. In addition, a communication hole 13 communicating with the water jacket 12 is opened in the upper deck 1a, and the coolant is circulated in the cylinder head 2 side. And each said inner diameter 10 is fitted with the piston 6 slidingly, The upper ring 7 is attached to this piston 6 is attached.

상기 실린더헤드(2)에는, 내경(10)의 둘레가장자리부위쪽에 부실(4)이 배치되어 있다. 이 부실(4)은 실린더헤드(2)의 밑바닥면에 체임버(5)를 끼워붙여서 형성된다. 또, 실린더헤드(2)에는, 기통렬방향(도 1에서 상하방향)으로 배열해서 각기통C1~C4에 1개의 흡기포트(8)와 1개의 배기포트(9)가 개구되고, 도시생략한 흡기밸브 및 배기밸브에 의해서 개폐된다.In the cylinder head 2, a subsidiary chamber 4 is disposed at the circumferential edge portion of the inner diameter 10. The sub chamber 4 is formed by fitting the chamber 5 to the bottom surface of the cylinder head 2. In addition, in the cylinder head 2, one intake port 8 and one exhaust port 9 are opened in the cylinders C 1 to C 4 arranged in the cylinder column direction (up and down direction in FIG. 1). It is opened and closed by an omitted intake valve and exhaust valve.

실린더블록(1)의 일단부(도 1에서 아래쪽)의 제 1 기통C1에서는, 단부쪽에 배기포트(9)가 안쪽에 흡기포트(8)가 개구하고, 실린더블록(1)의 타단부(도 1에서 위쪽)의 제 4기통C4에서는, 단부쪽에 흡기포트(8)가 안쪽에 배기포트(9)가 각각 개구하고 있다.In the first cylinder C 1 of one end (downward in FIG. 1) of the cylinder block 1, the inlet port 8 opens in the exhaust port 9 at the end thereof, and the other end of the cylinder block 1 ( In the fourth cylinder C 4 (upper side in FIG. 1), the intake port 8 is opened at the end side, and the exhaust port 9 is open at the inside.

상기 부실(4)은, 그 중심이, 기통렬방향에 대해서 수직이고 또한 내경(10)의 중심을 통과하는 중심선상에 위치하고, 기통렬의 한쪽면(도 1에서 우측)에 배열해서 배치되어 있다. 체임버(5)의 분출구(5a)가 내경(10)을 향해서 개구하고, 부실(4)은 내경(10)내와 내경둘레가장자리부의 상부덱(1a)에 걸쳐서 형성되어 있다.The subsidiary chamber 4 is disposed on a center line of which the center thereof is perpendicular to the cylinder column direction and passes through the center of the inner diameter 10 and arranged on one side (right side in FIG. 1) of the cylinder column. . The jet port 5a of the chamber 5 opens toward the inner diameter 10, and the sub chamber 4 is formed over the inner deck 10 and the upper deck 1a of the inner diameter circumferential portion.

헤드볼트는, 각기통의 내경(10)사이의 좌우양쪽 및 전후단부의 좌우양쪽에 각각 배치된 헤드볼트구멍(15)에 나사식맞춤되는 것이며, 1개의 내경(10)에 대해서 그 원주상에 4개의 헤드볼트구멍(15)이 형성되고, 헤드볼트축력(軸力)이 작용한다. 그리고, 우측의 헤드볼트구멍(15)의 중간에 상기 부실(4)이 위치하게 된다.The head bolts are screw-fitted to the head bolt holes 15 arranged respectively on the left and right sides between the inner diameters 10 of the cylinders, and on the left and right sides of the front and rear ends thereof, and on the circumference of the one inner diameter 10. Four head bolt holes 15 are formed, and the head bolt axial force acts. The sub chamber 4 is located in the middle of the head bolt hole 15 on the right side.

상기와 같은 구조의 실린더블록(1)에 있어서, 상기 부실(4)의 아래쪽에 위치하는 물재킷(12)의 부분에는, 그 상부덱(1a)의 두께가, 물재킷(12)의 천장높이를 높게하므로서 얇게된 얇은 두께부분(20a~20d)이 형성되어 있다.In the cylinder block 1 having the above structure, the thickness of the upper deck 1a is the height of the ceiling of the water jacket 12 in the portion of the water jacket 12 located below the sub chamber 4. By thinning the thin thickness portion 20a ~ 20d is formed.

구체적으로는, 도 3(a)에는 제 1~제 3기통(C1~C3)의 얇은두께부분(20a~20c)의 단면을 표시하고, 동도면(b)에는 제 4 기통(C4)의 얇은두께부분(20d)의 단면을 표시하고 있다. 이 얇은 두께부분 이외의 다른 부분은 상부덱(1a)의 두께는 t0로 두껍게 형성되고, 부실(4)아래쪽의 얇은두께부분(20a~20d)은 오목형상의 하부면에 의해 그 두께가 t1으로 얇게 형성되어 있다.Specifically, the cross section of the thin-thickness portions 20a to 20c of the first to third cylinders C 1 to C 3 is shown in FIG. 3 (a), and the fourth cylinder C 4 is shown in the same drawing (b). The cross section of the thin-thickness part 20d of () is shown. Other than the thin part, the upper deck 1a is formed to have a thickness of t 0 , and the thin part 20a to 20d below the insulator 4 has a concave bottom surface whose thickness is t. It is thin as 1 .

제 1~제 3기통(C1~C3)에서는, 부실(4) 및 내경(10)의 중심선(S)에 대해서 양쪽에 내경(10) 방향으로 균등하게 얇은두께부분(20a~20c)이 L1의 길이로 형성되고, 양단부는 경사면이 형성되어서 서서히 얇은두께로 형성된다.In the first to third cylinders C 1 to C 3 , the thinner portions 20a to 20c are equally thin in both directions with respect to the center line S of the inferior chamber 4 and the inner diameter 10. is formed from a length of L 1, both end portions is formed to be inclined is formed to gradually thin.

제 4기통(C4)에서는, 상기한 바와 같이 흡기포트(8)가 실린더블록단부쪽에 위치하고 있으며, 이 단부쪽의 열부하가 낮으므로서, 얇은두께부분(20d)도 이 단부쪽이 적고 전체적으로 상기 L1보다 짧은 L2의 길이로 형성되어 있다. 즉, 상기 중심선(S)에 대해서, 안쪽(도면에서 좌측)은 제 1~제 3기통과 마찬가지의 형성범위이지만, 단부쪽(도면에서 우측)은 경사면 및 평탄면 다같이 좁은 범위에 형성되어 있다.In the fourth cylinder C 4 , as described above, the intake port 8 is located on the cylinder block end side, and the heat load on the end side is low, so that the thin portion 20d also has the small end side as a whole. It is formed by the length of the shorter than L 2 L 1. That is, with respect to the center line S, the inner side (the left side in the figure) is formed in the same range as the first to the third cylinders, but the end side (the right side in the figure) is formed in a narrow range such as both the inclined surface and the flat surface. .

도 1에서, 내경(10) 사이의 실린더블록(10)에는, 양쪽의 물재킷(12)을 연통하도록 크로스드릴구멍(17)이 비스듬히 교차해서 뚫어지고, 냉각수가 유통하도록 형성되어 있다.In Fig. 1, the cross-drill holes 17 are drilled at an angle to intersect the cylinder block 10 between the inner diameters 10 so as to communicate with the two water jackets 12, and the coolant flows.

상기와 같은 실린더블록구조에 의하면, 부실(4) 아래쪽의 물재킷(12)부분의 상부덱(1a)이 얇은두께부분(20a~20d)으로 설치되고, 이 부분은 냉각수에 의한 냉각성이 높여져서 부실(4)에 의한 열부하가 경감되고, 온도상승이 억제된다. 이에 따라, 피스톤(6)에 있어서의 상부링(7)의 온도도 저하해서, 이 상부링(7) 위치를 높게 할 수 있고, 압축용적의 저감에 의해 출력향상을 도모할 수 있다.According to the cylinder block structure as described above, the upper deck (1a) of the water jacket 12 portion of the lower portion of the sub-chamber (4) is provided as a thin thickness portion (20a ~ 20d), this portion is to increase the cooling by the coolant The heat load by the inferior chamber 4 is reduced, and temperature rise is suppressed. As a result, the temperature of the upper ring 7 in the piston 6 is also lowered, the position of the upper ring 7 can be increased, and the output can be improved by reducing the compression volume.

상기와 같은 본 발명의 부실식디젤엔진의 실린더블록구조에 의하면, 부실의 배치에 따라 고온으로 되기 쉬운 부실하부의 물재킷에 있어서의 상부덱을 얇게함으로서, 이 얇은 두께부분을 통한 냉각성의 향상을 얻을 수 있고, 피스톤에 대한 열부하의 경감에 의해 상부링위치의 상승이 가능하게 되고, 데드볼륨(dead volume)의 감소에 의한 출력성능의 향상이 가능하게 된다. 또, 부실하부의 얇은두께부분 이외의 상부덱에 대해서는 충분한 두께를 확보해서, 이 두꺼운 상부덱에 의해 강성을 높이고, 헤드볼트의 체결축력에 의한 내경변형을 방지할 수 있고, 높은 면압에 의해 가스밀봉성을 확보할 수 있다.According to the cylinder block structure of the subsidiary diesel engine of the present invention as described above, the upper deck in the water jacket of the subsidiary lower part which tends to become high temperature according to the arrangement of the subsidiary chamber is made thin, thereby improving the cooling performance through this thin thickness portion. The upper ring position can be increased by reducing the heat load on the piston, and the output performance can be improved by reducing the dead volume. In addition, for the upper deck other than the thin part of the inferior lower part, sufficient thickness is ensured, the rigidity is increased by the thick upper deck, and the inner diameter deformation due to the tightening axial force of the head bolt can be prevented. Sealability can be secured.

또, 내경의 주위에 4개의 헤드볼트를 배치하도록 한 것에서는, 볼트축력의 작용이 적은 부위에 상기 부실의 배치 및 상부덱의 얇은두께부분이 위치해서, 냉각성의 개선과 함께 양호한 밀봉성을 얻을 수 있다.In the case where four head bolts are arranged around the inner diameter, the inferior arrangement and the thin thickness portion of the upper deck are located at the site where the action of the bolt axial force is small, so that the sealing property is improved and the sealing property is improved. Can be.

또, 단부기통의 얇은두께부분을 좁게 한 것에서는, 이 단부기통에 있어서는 그 실린더블록단부쪽에 대해서도 물재킷이 둘러싸여서 형성되므로서 이 부분의 냉각성이 높고, 부실아래쪽의 얇은두께부분의 범위를 좁게하는 것이 가능하고 상부덱의 강성을 향상시킬 수 있다. 특히, 흡기포트가 단부쪽에 위치하는 단부기통에서는, 이 단부쪽의 냉각성이 더욱 높고, 얇은두께부분범위를 좁게할 수 있다.In the case of narrowing the thinner thickness portion of the end cylinder, in this end cylinder, a water jacket is formed around the cylinder block end portion, so that the cooling performance of this portion is high, and the range of the thin thickness portion under the insulator is narrow. It is possible to improve the rigidity of the upper deck. In particular, in the end cylinder in which the intake port is located at the end side, the cooling property at this end side is higher, and the range of the thin thickness portion can be narrowed.

또, 내경사이에 양쪽의 물재킷을 연통하는 크로스드릴구멍을 형성하므로서 냉각수가 내경사이를 통과해서 유통하고, 부실쪽의 냉각성의 향상을 도모할 수 있다.In addition, by forming a cross drill hole in which both water jackets communicate between the inner diameters, the cooling water passes through the inner diameters, and the cooling property of the inferior side can be improved.

Claims (5)

각기통의 내경이 개구된 실린더블록에 있어서의 내경둘레가장자리부에 물재킷이 형성되고, 상기 실린더블록의 상부덱위쪽에 있어서 내경둘레가장자리부의 위쪽의 실린더헤드에 부실이 배치된 부실식디젤엔진에 있어서,A water jacket is formed in the inner diameter circumference edge of the cylinder block in which the inner diameter of each cylinder is opened, and in the subsidiary diesel engine in which the stale is disposed in the cylinder head above the inner diameter circumference of the upper deck of the cylinder block. In 상기 내경둘레가장자리부의 물재킷에 있어서의 부실아래쪽부분의 천장높이를 다른 부위의 그것에 대해서 높게 설정하고, 상부덱두께를 얇게한 얇은두께부분을 형성한 것을 특징으로 하는 부실식디젤엔진의 실린더블록구조.The cylinder block structure of the corrugated diesel engine, wherein the ceiling height of the lower part of the bobbin in the water jacket of the inner diameter circumference is set high relative to that of the other part, and a thin thickness portion having a thin upper deck thickness is formed. . 제 1항에 있어서, 직렬로 각기통이 배치되고, 그 내경사이의 양쪽에 1쌍이 헤드볼트가 배치되고, 각 내경의 주위에 4개의 헤드볼트가 위치하고, 기통렬방향에 있어서의 헤드볼트사이의 내경둘레가장자리부의 위쪽에 부실이 배치되고, 이 부실 아래쪽의 상부덱을 얇게 형성해서 얇은두께부분을 형성한 것을 특징으로 하는 부실식디젤엔진의 실린더블록구조.2. A cylinder according to claim 1, wherein respective cylinders are arranged in series, one pair of head bolts are disposed between both of the inner diameters, and four head bolts are positioned around each of the inner diameters. A cylinder block structure of an insulated diesel engine, wherein an insulator is disposed above an inner circumferential edge, and a thin upper portion is formed by forming a thin upper deck under the insulator. 제 1항에 있어서, 단부기통의 얇은두께부분의 형성범위를 다른 기통의 얇은두께부분의 형성범위보다 좁게한 것을 특징으로 하는 부실식디젤엔진의 실린더블록구조.2. The cylinder block structure of an injectable diesel engine according to claim 1, wherein the forming range of the thin-thickness portion of the end cylinder is narrower than the forming range of the thin-thickness portion of the other cylinder. 제 3항에 있어서, 실린더블록의 일단부에 위치하는 동시에, 기통렬의 단부쪽에 흡기포트가 위치하는 기통이고, 상기 얇은두께부분의 형성범위를 다른 기통의 얇은두께부분의 형성범위보다 좁게한 것을 특징으로 하는 부실식디젤엔진의 실린더블록구조.4. A cylinder according to claim 3, wherein the cylinder block is located at one end of the cylinder block and the intake port is located at the end of the cylinder row, and the formation range of the thin thickness portion is narrower than the formation range of the thin thickness portion of the other cylinder. The cylinder block structure of a troublesome diesel engine characterized by the above-mentioned. 제 1항에 있어서, 기통렬에 있어서의 내경사이에, 양쪽의 물재킷을 연통하는 크로스드릴구멍이 형성된 것을 특징으로 하는 부실식디젤엔진의 실린더블록구조.The cylinder block structure of an injectable diesel engine according to claim 1, wherein a cross-drilled hole for communicating both water jackets is formed between the inner diameters of the cylinder rows.
KR1019970047368A 1996-09-20 1997-09-13 Cylinder block structure of insolvent diesel engine KR19980024662A (en)

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JP8250179A JPH1089144A (en) 1996-09-20 1996-09-20 Cylinder block structure of indirect injection diesel engine

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Publication number Priority date Publication date Assignee Title
JPH1089144A (en) * 1996-09-20 1998-04-07 Mazda Motor Corp Cylinder block structure of indirect injection diesel engine
JP6394899B2 (en) * 2015-02-06 2018-09-26 トヨタ自動車株式会社 Cylinder block

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5952151U (en) * 1982-09-30 1984-04-05 マツダ株式会社 Engine cylinder block structure
JPH03267551A (en) * 1990-03-15 1991-11-28 Mazda Motor Corp Cylinder head of diesel engine equipped with subchamber
JPH0734875A (en) * 1993-07-23 1995-02-03 Kubota Corp Cylinder head for engine having subsidiary chamber
JPH1089144A (en) * 1996-09-20 1998-04-07 Mazda Motor Corp Cylinder block structure of indirect injection diesel engine
KR19980044437A (en) * 1996-12-06 1998-09-05 박병재 Combustion chamber cooling structure of diesel engine

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5952151U (en) * 1982-09-30 1984-04-05 マツダ株式会社 Engine cylinder block structure
JPH03267551A (en) * 1990-03-15 1991-11-28 Mazda Motor Corp Cylinder head of diesel engine equipped with subchamber
JPH0734875A (en) * 1993-07-23 1995-02-03 Kubota Corp Cylinder head for engine having subsidiary chamber
JPH1089144A (en) * 1996-09-20 1998-04-07 Mazda Motor Corp Cylinder block structure of indirect injection diesel engine
KR19980044437A (en) * 1996-12-06 1998-09-05 박병재 Combustion chamber cooling structure of diesel engine

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