KR20020049104A - Exhaust manifold cooling apparatus - Google Patents

Abstract

PURPOSE: An apparatus for cooling an exhaust manifold is provided to cool the exhaust manifold by outer air flowed in a cover sealing the exhaust manifold so that the temperature in an engine room become low. CONSTITUTION: An apparatus for cooling an exhaust manifold comprises a cover(4) sealing the exhaust manifold, a path(11) for cold air installed at the cover to make air of the room temperature flowed in the cover through the path for cold air, a path(12) for hot air to make the air heated by the exhaust manifold discharged to the outside, and a fan(20) providing the force to discharge the air of room temperature flowed in the cover through the path for cold air through the path for hot air. An insulating material is inserted in the cover.

Description

Exhaust manifold cooling apparatus

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exhaust manifold cooling device, wherein external air discharged by a fan flows into a cover that seals and surrounds the exhaust manifold to cool the exhaust manifold and discharge it to the outside.

In general, the exhaust system mitigates the strong impact sound of the exhaust gas discharged from the combustion chamber so as not to exceed a certain noise level. The first half of the exhaust system is exposed to high temperature heat load and severe temperature difference, the combustion temperature of the mixer in the internal combustion engine is higher than 2000 ° C, and the exhaust gas discharged from the cylinder reaches approximately 1000 ° C.

As shown in FIG. 1, the combustion gas combusted in the engine 1 is discharged through the exhaust manifold 3 attached to one side of the engine, and is exhausted by the exhaust gasket 2 so that the combustion gas does not leak. The fold 3 is in close contact with the engine 1. The outside of the exhaust manifold 3 is surrounded by the lid 4 so that the engine room does not rise in temperature due to the high temperature combustion gas discharged from the engine 1. Protect. In addition, the engine room is cooled by a cooling fan attached to the radiator so that the temperature of the engine room is not increased by the exhaust manifold 3, and the engine room uses a noise material so that noise by the combustion gas is not transmitted to the outside. Wrapped

However, the exhaust manifold is not completely blocked from the engine room, so that the temperature of the engine room is increased to adversely affect various components in the engine room, and a noise material is required to reduce noise caused by combustion gases.

As a result, the outside air discharged by the cooling fan flows into the cover that seals and surrounds the exhaust manifold, thereby cooling the exhaust manifold to cool the engine room temperature.

1 is a configuration diagram showing a conventional exhaust manifold.

Figure 2 is a block diagram showing an exhaust manifold provided with a cooling device according to the present invention.

3 is a cross-sectional view of an exhaust manifold provided with a cooling apparatus according to the present invention.

(Explanation of symbols for the main parts of the drawing)

1: engine 2: exhaust gasket

3; Exhaust Manifolds 4 and 10: Cover

10a, 10b: upper and lower covers

11, 12: low and high temperature air passage

13: outer cover 14: inner cover

15: insulation 20: cooling fan

30: motor 40: ECU

50: engine speed sensor

The object as described above is easily achieved according to the present invention in which the exhaust manifold is sealed and wrapped with a cover provided with a passage through which air is introduced and discharged, and outside air is introduced through the passage by a cooling fan.

As shown in FIG. 2, the exhaust manifold 3 through which the combustion gas discharged from the engine 1 passes is in close contact with the engine 1 by the exhaust gasket 2.

The exhaust manifold 3 is enclosed as if it is sealed by the cover 10, and the cover 4 is a cold air passage 11 through which external low temperature air flows and the cold air is discharged by the exhaust manifold 3. A hot air passage 12 is provided which is heated and discharged. In addition, the cold air passage 11 is provided with a cooling fan 20 connected to the motor 30 so that the air introduced from the outside cools the exhaust manifold 3 at a high speed.

Preferably, the motor 30 is connected to the ECU 40, the ECU 40 receives the engine speed from the engine speed sensor 50, the rotation speed of the cooling fan 40 according to the running state of the vehicle Determine the cooling speed of the exhaust manifold (3), thereby reducing the rotational speed of the cooling fan 40 when the load of the vehicle is small to prevent power loss.

3 shows a cross section of a cover surrounding the exhaust manifold, through which the combustion gas is discharged through the exhaust manifold 3 attached to the engine.

Cover 10 is composed of an upper cover (10a) and a lower cover (10b) to seal and wrap the exhaust manifold (3), the lower cover (10b) is in contact with the lower surface of the exhaust manifold (3) and the upper cover ( 10a is located on the upper surface, and the upper cover 10a and the lower cover 10b are engaged with each other to seal the exhaust manifold 3. In addition, a space is provided between the cover 10 and the exhaust manifold 3 so that air introduced from the outside effectively cools the exhaust manifold 3, and the upper cover 10a and the lower cover 10b Insulation material 15 is inserted into the space formed between the outer cover 13 and the inner cover 14 so as to be composed of the outer cover 13, the inner cover 14, and the heat insulating material 15, respectively. Do not let the heat released to the engine compartment.

As a result, the cover seals and surrounds the exhaust manifold 3 and is spaced a predetermined distance from the exhaust manifold 3 to provide an air passage 23, and sucks external low temperature air through the low temperature air passage provided on one side. The exhaust manifold 3 is cooled, is discharged to the outside through the hot air passage provided on the other side, and is configured such that the hot air is not transmitted to the engine room. In addition, it is preferable that a heat insulating material is provided so that the hot air passage is heated by the hot air so as not to affect the engine room.

As a result, since the exhaust manifold is cooled by the air introduced from the outside, the engine room is cooled to improve durability of various parts of the engine room, and the insulation provided to the exhaust manifold acts as a noise material, thereby reducing noise. have.

Claims (2)

An exhaust manifold cooling device for cooling an exhaust manifold heated by combustion gas, A cover for sealing and enclosing the exhaust manifold; A cold air passage provided in the cover to allow room temperature air to flow into the cover; A hot air passage provided in the cover such that the air at room temperature is heated by the exhaust manifold to flow out; And a fan providing an earth output so that air at room temperature flows out through the cold air passage into the hot air passage. The method of claim 1, The cover is an exhaust manifold cooling device, characterized in that the insulation is inserted inside.