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Cooling structure of engine

An engine and structure technology, applied in the direction of engine cooling, engine components, machine/engine, etc., can solve the problems of small pressure difference and insufficient cooling

Inactive Publication Date: 2006-01-04
ISUZU MOTORS LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, in the upper cooling water jacket 52 and the lower cooling water jacket 53, the side of the lower cooling water jacket 53 is under high pressure, because the pressure difference between the cooling water jacket 55 and the lower cooling water jacket 53 between the cylinders is small, there is no pressure in the cut hole 56. There will be a large flow of cooling water flowing through, and there is a problem that sufficient cooling effect cannot be obtained

Method used

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  • Cooling structure of engine
  • Cooling structure of engine
  • Cooling structure of engine

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Embodiment Construction

[0014] Below, preferred embodiments of the present invention will be described in detail according to the accompanying drawings.

[0015] Such as figure 1 and figure 2 As shown, the cylinder head 1 is fastened to the top of the cylinder block 2 by bolts (not shown) clamping washers (not shown). The cylinder block 2 and the cylinder head 1 protrude forward and backward in the longitudinal direction of the cylinder bore 3 or in the longitudinal direction of the engine. figure 1 A longitudinal section of the inside of the partition wall 4 between the cylinders 3 is shown. Included in the partition wall 4 , there are bolt holes 5 , 6 vertically penetrating at the front, rear, left, and right four corners of the cylinder tube 3 in the cylinder head 1 and cylinder block 2 . That is, in this engine, the long bolts are passed through the bolt holes 5, 6 from above the cylinder head 1, and screwed into the bearing cap at the bottom outside the figure, so that the cylinder head 1,...

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Abstract

Cooling structure of engine increases a flow rate of cooling water flowing in a drilled hole between cylinder bores and promotes cooling of a partition wall between the bores. Water jackets 7, 7 between bores and cooling holes 10, 10 (drilled holes) between bores connected with the water jackets 7, 7 and opening to an upper surface 2a of a cylinder block are formed on the partition wall 4 between the cylinder bores of the cylinder block 2. An upper water jacket 8 and a lower water jacket 9 are provided on a cylinder head 1, and one 8 which has lower pressure out of the upper water jacket 8 and the lower water jacket 9 is connected with the cooling holes 10, 10 between bores. Because the pressure of the upper water jacket 8 is lower than that of the lower water jacket 9, differential pressure between upstream and downstream end of the cooling holes 10, 10 between bores increases and the flow rate in the cooling holes 10, 10 between the bores increases.

Description

technical field [0001] The present invention relates to a cooling structure suitable for engines such as diesel engines and gasoline engines, in particular to a structure for better cooling between cylinder bores. Background technique [0002] Conventionally, a so-called double-type cylinder block is known in which adjacent cylinder bores are separated by a common partition wall. At this time, cooling water jackets are provided on both sides of the partition wall, and the thickness of the central part is very thin, so it is not easy to form a cooling water jacket. Here, a cut hole communicating with the cooling water jacket is set through the upper surface of the cylinder block, and the cooling water flows through the cut hole from the side of the cooling water jacket to the side of the cylinder head to promote the cooling of the center of the partition wall (see Japanese Patent Laid-Open No. 1-145965 Bulletin). [0003] In addition, an engine is known in which a cylinder ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02F1/40F02F1/14F02F1/10F01P3/02F02F1/36F02F1/42
CPCF02F1/40F02F1/4214
Inventor 市川弘之
Owner ISUZU MOTORS LTD