KR0124034Y1 - Auto-cooling fan driving device of automotive engine - Google Patents

Abstract

To reduce the unnecessary engine power loss by circulating the coolant around the coupling so that the bimetals installed therein can directly operate the coolant according to the temperature of the coolant;

In the automatic cooling fan drive device formed by installing the coupling housing through the spacer at the distal end of the crankshaft 100 rotated by the operation of the engine, and forming the cooling ring on the outside of the coupling housing, the cylinder A bimetal is formed in the front of the crankshaft and around the coupling housing, and a cooling water circulation passage is formed around the coupling housing so that the cooling water circulating in the jacket of the block can be circulated to the coupling housing. Provided is an automatic cooling fan driving apparatus for an automobile engine formed by being in contact with the cooling water.

Description

Auto Cooling Fan Drive of Automobile Engine

1 is a cross-sectional view of a cooling fan drive device according to the present invention.

2 is a cross-sectional view of a conventional cooling fan drive device.

* Explanation of symbols for main parts of the drawings

1: crankshaft 2: main journal

4 supply part 6 outlet

8: cooling water circulation passage 24, 26, 28: seal

30,31: packing 32: shock coupling

34: bimetal

[Field of design]

The present invention relates to an automatic cooling fan drive device for an automobile engine, and more particularly, an automotive engine in which a cooling fan is circulated around a fan coupling so that a bimetal installed therein can operate the cooling fan directly according to the temperature of the cooling water. Relates to an automatic cooling fan drive device.

[Private Technology]

The temperature of the gases burned in the cylinders of automobile engines during the combustion period ranges from about 2,000 degrees to 2,500 degrees, and this heat is transmitted to the cylinder walls, cylinder heads, pistons, valves and other parts, causing deformation of each part, Insufficient lubrication causes large damage to the engine, and the engine is provided with a cooling device that cools heat generated during operation.

Such a cooling device is composed of a water cooling type and an air cooling type, and almost all forced circulation type water cooling units are adopted in an engine applied to an automobile.

The forced circulation type cooling device circulates the cooling water in a jacket formed in the cylinder block and the cylinder head to perform a cooling action, and circulates the heated cooling water to a radiator to perform cooling.

The rear side of the radiator is equipped with a cooling fan forcibly sucking outside air so that the air passes through the radiator to cool the cooling water smoothly. The cooling fan is rotated by the rotational force of the crankshaft.

In driving the cooling fan, the cooling fan is arranged on the water pump shaft that rotates the water pump so that the cooling fan always rotates when the engine is started. There is a way to rotate the cooling fan when the temperature rises above, the present invention relates to the latter.

In the latter method, the cooling fan is mounted on a separate electric motor to be driven according to the ambient temperature, and the electric fan is widely applied to a passenger car, and the cooling fan is mounted between a crank shaft and a coupling. However, the present invention relates to the latter, and the prior art thereof is as follows.

By installing the fan coupling 102 via the spacer 101 via the spacer 101 at the front end of the crankshaft rotated by the operation of the engine, and forming a cooling fan 103 on the outer side of the shock coupling 102 In addition, the front surface of the shock coupling 102 has a configuration in which the bimetal 104 for sensing the ambient temperature to control the operation / non-operation of the fluid coupling 102 is disposed.

In FIG. 2, reference numeral 105 denotes a crankshaft pulley and 106 denotes a belt.

The cooling fan drive unit stops the operation of the coupling when the temperature of the coolant passing through the radiator is lower than the predetermined temperature. When the temperature of the cooling water passing through the radiator is higher than or equal to the predetermined temperature, the coupling is made by the bimetal. By adjusting the amount to operate, the speed of the cooling fan is varied by the amount of fluid so that the high temperature coolant from the engine is cooled by the amount of wind that varies depending on the rotational speed.

However, in the above cooling method, the bimetal senses the temperature of the coolant passing through the radiator to control the operation / non-operation of the fluid clutch. However, the bimetal mounted on the coupling has a bimetal according to the ambient temperature of the engine room. Since the rotation speed of the cooling fan is greatly affected by this operation, the rotation speed is changed irrespective of the temperature of the cooling water circulating the engine, thereby causing a power loss of the engine.

[Intention summary]

Therefore, the present invention was devised to solve the above problems, and an object of the present invention is to circulate the cooling water around the coupling so that the bimetal installed thereon can operate the cooling fan directly according to the temperature of the cooling water. It is to provide an automatic cooling fan drive of an automobile engine that can reduce unnecessary engine power loss.

In order to realize this, the present invention provides an automatic cooling fan drive device in which a coupling housing is installed by interposing a spacer at the front end of a crankshaft rotated by the operation of an engine, and a cooling cylinder is formed outside the coupling housing. A cooling water circulation passage is formed around the front end of the crankshaft and the spacer and the coupling housing so that the cooling water circulated in the cylinder block of the cylinder block can be circulated to the coupling coupling housing. Provided is an automatic cooling fan driving apparatus of an automotive engine formed by forming a bimetal disposed in contact with the cooling water.

Hereinafter, preferred embodiments of the present invention that can specifically realize the above object will be described in detail with reference to the accompanying drawings.

EXAMPLE

1 is a cross-sectional view of a drive device according to the present invention, and forms a supply port 4 and a discharge port 6 for supplying cooling water to the upper and lower sides of the main journal part 2 supporting the leading end of the crankshaft 1. It was.

The crank shaft 1 is provided with a cooling water circulation passage 8 in communication with the supply port 4 and the discharge port 6, wherein the cooling water circulation passage 8 is a crank pulley 10 and the spacer 12 And it was formed to circulate the outer shell of the coupling housing (14).

In addition, the inlet 16 and the outlet 18 of the coolant circulation passage 8 are formed spaced apart from each other at predetermined intervals, and the periphery thereof is in communication with the semicircular circumferential grooves 20 and 22 so that the supply port ( 4) and the outlet 6, and seals 24, 26, 28 for airtightness are disposed between both sides of the circumferential grooves 20, 22 and between them.

The crank pulley 10, the spacer 12, and the assembly portion of the spacer 12 and the coupling housing 14 may be provided with packings 30 and 31 for airtightness, as well as the cooling water circulation passage. On (8), the bimetal 34 which arranges / uncontrols the shock coupling 32 according to the temperature of cooling water is arrange | positioned.

Accordingly, the coolant supplied to the supply port 4 of the cylinder block circulates through the coolant circulation passage 8 through the circumferential groove 20 and the inlet 16 to once contact the bimetal 34 to operate the bimetal 34. After being discharged to the outlet 6 through the outlet 18 and the circumferential groove 22 is returned to the cylinder block radiator.

Since the shock coupling 32 embedded inside the shock coupling housing 14 is known to allow torque transmission by the viscous shear stress action of the silicone oil filled therein as the bimetal 34 is opened and closed. Its configuration and description are omitted.

According to the present invention configured as described above, the automatic cooling fan drive device is operated by operating / deactivating the coupling of the fan automatically according to its coolant temperature while the bimetal is in contact with the coolant, so that the cooling fan is entirely dependent on the coolant temperature. As it is driven, it is a useful design that can reduce the power loss of the engine because the unnecessary cooling fan driving due to the ambient temperature of the engine room is prevented.

Claims (3)

The coupling housing 14 is provided at the distal end of the crankshaft 1 which is rotated by the operation of the engine, and the cooling coupling is formed outside the coupling housing 14. In the automatic cooling fan drive, the front end of the crankshaft (1) and the spacer (12), and the fan coupling housing (14) so that the coolant circulating in the cylinder block of the cylinder block can be circulated to the fan coupling housing (14). Cooling water circulation passage (8) is formed around, and the bar metal (34) disposed in front of the coupling housing (14) is formed so as to be in contact with the cooling water is an auto-cooling fan drive device of an automotive engine. The cooling water circulation passage (8) according to claim 1, wherein the cooling water circulation passage (8) is spaced apart from the inlet (16) and the outlet (18) at predetermined intervals, and the semicircular circumferential groove (20) is formed at the outer circumference of the crank shaft (1) around them. (22) is formed to communicate with the supply port (4) and the discharge port (6), and both sides of the inlet groove (20) (22) and the date (24, 26, 28) for airtight between them Automatic cooling fan drive device of an automobile engine, characterized in that the arrangement is made. The automobile engine according to claim 1, wherein the assembly of the crank pulley (10), the spacer (12), the spacer (12), and the coupling housing (14) is provided with packings (30) (31) for airtightness. Automatic cooling fan drive.