KR200246567Y1 - Exhaust Manifold Cooling System - Google Patents

Abstract

The present invention relates to an exhaust manifold cooling device that can protect the environment by increasing the durability and restraining the discharge of harmful substances by cooling the exhaust gas discharged through the exhaust manifold using engine cooling water. The apparatus supplies a coolant pipe (36) installed in an exhaust manifold (38) for sending exhaust gas combusted from an engine to an exhaust pipe, and a coolant flowing from a cylinder head to the coolant pipe (36) through an inlet hose (32). Then, it consists of a flow path variabler 40 with a thermostat 50 to send the cooling water discharged through the outlet hose 34 to the radiator 30.

Description

Exhaust manifold cooling system

The present invention relates to an exhaust manifold cooling device, and more particularly, by cooling the exhaust gas discharged through the exhaust manifold using engine cooling water, exhaust manifold cooling which can increase durability and suppress the discharge of harmful substances to the maximum. Relates to a device.

In general, when the exhaust gas of a vehicle is classified according to the emission source, the exhaust gas of the fuel and air mixture is combusted in a cylinder and then released into the atmosphere through an exhaust pipe, and the evaporation gas and piston from which gasoline in the fuel tank is evaporated. The gap between the cylinder wall and the cylinder can be divided into a blow-by gas in which the combustion chamber's mixer or unburned gas flows into the crankcase.

Among them, the exhaust gas discharged from the engine through the exhaust manifold contains a large number of harmful gases, and in order to prevent environmental pollution, these harmful gases are treated by a catalytic converter before being released into the atmosphere and are harmless. Should be converted to and released.

FIG. 1 is a block diagram illustrating a general vehicle exhaust system, which moves up and down along a wall of a cylinder by a rotational force of a crankshaft transmitted through a connecting rod 4 in a cylinder integrally formed in a cylinder block 2 of an engine. The piston 6 is provided. Air is introduced into the combustion chamber provided by the cylinder head and the head of the piston 6 through the intake manifold 12, and after combustion, the exhaust gas is discharged through the exhaust manifold 14 to the exhaust pipe. The cylinder block 2 and the cylinder head are formed with a water jacket through which cooling water flows.

The air introduced through the mixer forming mechanism 16 is supplied to the combustion chamber upon opening of the intake valve 8 and then mixed with fuel injected from the injection valve to form a mixer. The mixer is ignited and combusted by the spark plug through a compression process, and the combusted exhaust gas is discharged through the exhaust manifold 14 at the time of opening the exhaust valve 10.

The exhaust manifold 14 is provided with an air ratio sensor 18, and the engine control unit (ECU) 22 is connected to the mixer forming mechanism 16 in accordance with an input signal transmitted from the air ratio sensor 18. The control signal is sent to minimize the emission of harmful gases. Various kinds of harmful substances are contained in the exhaust gas discharged through the exhaust manifold 18 and are removed by the catalytic converter 20.

In the conventional exhaust system having such a configuration, as the engine power is increased, the temperature of the exhaust gas discharged to the outside through the exhaust manifold is increased, thereby reducing durability. In order to solve this problem, the material of the exhaust manifold may be changed, but there is a problem in that the manufacturing cost is increased.

The present invention has been devised to solve such a problem, by installing a coolant pipe in the exhaust manifold, and then sending the engine coolant discharged from the engine to the coolant pipe to reduce the temperature of the exhaust gas discharged through the exhaust manifold. The object is to provide a manifold cooling device.

1 is a block diagram showing an exhaust system of a general vehicle.

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

3 is a cross-sectional view showing a thermostat employed in the present invention.

* Explanation of symbols for main parts of the drawings

2: cylinder block 6: piston

12: intake manifold 14, 38: exhaust manifold

30: radiator 32: inlet hose

34: outlet hose 36: coolant pipe

40: euro variable 50: thermostat

52: diaphragm

The object of the present invention described above is to supply the coolant pipe through a coolant pipe installed in an exhaust manifold that sends exhaust gas combusted from the engine to the exhaust pipe, and a coolant inlet hose flowing from the cylinder head, and then through an outlet hose. It is achieved by an exhaust manifold cooling device, characterized in that it consists of a flow path variable with a built-in thermostat for sending the discharged cooling water to the radiator.

Hereinafter, with reference to the accompanying drawings 2 and 3 will be described in detail with respect to the exhaust manifold cooling apparatus according to a preferred embodiment of the present invention.

2 is a block diagram showing an exhaust manifold cooling apparatus according to the present invention, Figure 3 is a cross-sectional view showing a thermostat employed in the present invention.

First, as shown in FIG. 2, in the preferred embodiment of the present invention, in order to lower the temperature of the exhaust gas discharged to the exhaust pipe through the exhaust manifold 38, a cooling water pipe 36 is provided to the exhaust manifold 38. After installation, the method of reducing exhaust heat by the engine coolant passing through this coolant pipe was adopted.

The coolant pipe 36 may be installed inside the exhaust manifold 38, or in some cases, may be installed to surround the outer circumference of the exhaust manifold 38 with the coolant pipe 36, but preferably the inside of the exhaust manifold 38. It is installed to circulate to increase the cooling efficiency.

The coolant discharged from the water jacket formed in the cylinder head of the engine flows into the flow path variable valve (40) having a built-in thermostat, and then the coolant pipe (36) installed in the exhaust manifold (38) through the inlet hose (32). Flows into. Cooling water that cools the exhaust gas through heat exchange while passing through the cooling water pipe 36 is discharged to the radiator 30 through the outlet hose 34.

In FIG. 3, the flow path variable device 40 employed in the present invention is shown. The flow path variable unit 40 includes a lower inlet 46 through which the coolant flows from the cylinder head, a lower outlet 48 through which the coolant flowed into the lower inlet 46 to the coolant pipe 36, and a coolant pipe 46. The upper inlet 44 through which the high-temperature cooling water cooled by heat exchange with the exhaust gas is introduced again, and the upper outlet 42 which sends the high-temperature cooling water introduced to the upper inlet 44 to the radiator 30. Is provided.

In addition, a thermostat 50 is formed inside the flow path variable body 40, and selectively opens the diaphragm 52 according to the temperature of the coolant to lower the coolant introduced from the cylinder head through the lower inlet 46. It can be discharged to the outlet 44 or the upper outlet 42.

That is, the lower inlet 46 and the lower outlet 48 is formed in the lower portion of the thermostat 50, the upper outlet 42 and the upper inlet 44 is formed on the upper portion of the thermostat 50, If the coolant does not reach the setting temperature of the thermostat 50, the coolant flows from the cylinder head into the lower inlet 46 and passes through the inlet hose 32 connected thereto through the lower outlet 48 to the cooling pipe 36. The cooling water, which is supplied and thus heat-exchanged in the cooling pipe 36, flows into the flow path variable unit 40 again through the upper inlet 44 to which the outlet hose 34 is connected, and then through the upper outlet 42. It is sent to the radiator 30. If the coolant temperature reaches the setting temperature of the thermostat 50, the coolant introduced from the cylinder head through the lower inlet 46 is then used to cool the exhaust manifold as part of the following radiator. It is sent to 30 and a part is directly sent to the radiator 30 through the upper outlet 42.

According to the present invention described above, by reducing the temperature of the exhaust gas as the engine coolant passes through the coolant pipe installed in the exhaust manifold, the life of the exhaust manifold can be extended, and the harmful substances contained in the exhaust gas are reduced to the environment. There is an advantage to prevent contamination.

Claims (1)

The coolant pipe 36 provided in the exhaust manifold 38 which sends the exhaust gas combusted by the engine to the exhaust pipe and the coolant flowing from the cylinder head are supplied to the coolant pipe 36 through the inlet hose 32. Next, the flow regulator 40 is composed of a flow channel variable 40 having a built-in thermostat for sending the cooling water discharged through the outlet hose 34 to the radiator 30, the variable 40 is a thermostat 50 A lower inlet 46 and a lower outlet 48 connected to the inlet hose 32 are formed at a lower portion of the cylinder head to allow the coolant to flow therethrough, and an upper inlet at which the outlet hose 34 is connected. Exhaust manifold cooling device characterized in that the upper outlet 42 is connected to the 44 and the radiator (30).