JPH0218616U

JPH0218616U -

Info

Publication number: JPH0218616U
Application number: JP7019788U
Authority: JP
Priority date: 1988-03-11
Filing date: 1988-05-27
Publication date: 1990-02-07
Anticipated expiration: 2003-05-27
Also published as: JPH0740654Y2

Description

[Brief explanation of drawings]

第１図は本考案の一実施例を示すエンジンの縦
断面図、第２図、第３図はそれぞれ冷却水の流れ
を示す回路図である。第４図Ａは他の実施例を示
すエンジンの縦断面図、第４図Ｂはシリンダブロ
ツクの一部平面図、第４図Ｃはエンジンの側面図
、第５図はエンジンの概略図、第６図は冷却水回
路図である。第７図Ａはさらに他の実施例を示す
シリンダブロツクの断面図、第７図Ｂはエンジン
の縦断面図、第８図はエンジンの概略図、第９図
は冷却水回路図である。第１０図はさらに他の実
施例を示すエンジンの縦断面図、第１１図はエン
ジンの概略図、第１２図は一部断面図である。第
１３図Ａはさらに他の実施例を示すシリンダヘツ
ドの縦断面図、第１３図Ｂはシリンダヘツドの平
面図、第１４図はエンジンの概略図、第１５図は
冷却水回路図である。１……シリンダブロツク、２……ライナ、３…
…入口、４……出口、６……循環室（循環通路）
、８……ウオータポンプ、９……ウオータジヤケ
ツト、１０……第二バイパス通路、１５……冷却
通路、１６……ラジエタ、１７……サーモスタツ
トバルブ、１８……第一バイパス通路。 FIG. 1 is a longitudinal sectional view of an engine showing an embodiment of the present invention, and FIGS. 2 and 3 are circuit diagrams showing the flow of cooling water. 4A is a longitudinal sectional view of the engine showing another embodiment, FIG. 4B is a partial plan view of the cylinder block, FIG. 4C is a side view of the engine, and FIG. 5 is a schematic diagram of the engine. Figure 6 is a cooling water circuit diagram. FIG. 7A is a sectional view of a cylinder block showing still another embodiment, FIG. 7B is a longitudinal sectional view of the engine, FIG. 8 is a schematic diagram of the engine, and FIG. 9 is a cooling water circuit diagram. FIG. 10 is a longitudinal sectional view of an engine showing still another embodiment, FIG. 11 is a schematic diagram of the engine, and FIG. 12 is a partial sectional view. FIG. 13A is a longitudinal sectional view of a cylinder head showing still another embodiment, FIG. 13B is a plan view of the cylinder head, FIG. 14 is a schematic diagram of the engine, and FIG. 15 is a cooling water circuit diagram. 1...Cylinder block, 2...Liner, 3...
...Inlet, 4...Outlet, 6...Circulation chamber (circulation passage)
, 8...Water pump, 9...Water jacket, 10...Second bypass passage, 15...Cooling passage, 16...Radiator, 17...Thermostat valve, 18...First bypass passage.

Claims

[Scope of utility model registration request]

A water jacket is formed for circulating cooling water in the cylinder block and the cylinder head, and a circulation passage branching from the water jacket is formed in at least one of the cylinder block or the cylinder head, and a circulation passage is formed in at least one of the cylinder block or the cylinder head, and a circulation passage is formed in at least one of the cylinder block or the cylinder head, and a cooling passage that supplies cooling water from the water pump and leads the cooling water from the water jacket to the suction side of the water pump via a radiator; a first bypass passage leading to the suction side of the water pump;
a thermostatic valve that opens and closes the first bypass passage depending on the temperature of the cooling water; and a thermostatic valve that supplies the cooling water from the water jacket to the circulation passage, and supplies the cooling water from the circulation passage to the cooling water by bypassing the radiator. An engine cooling device characterized in that a second bypass passage leading to the suction side of the water pump is provided, and the water flow resistance of the first bypass passage is equal to or smaller than the water flow resistance of the cooling passage. .