KR19990015081A - Vehicle exhaust and blow-by gas recirculation system for preventing carbon deposition in throttle body - Google Patents

Abstract

The present invention relates to a vehicle exhaust and blow-by gas recirculation device for preventing carbon deposition in the throttle body, by intermittently blocking the exhaust gas and blow-by gas of the EGR system into the throttle body to prevent the carbon in the throttle body The purpose of this is to prevent the malfunction of various valves that are connected and operated by the nipple provided in the throttle body according to the deposition of the throttle body.

The present invention for achieving the above object is provided with an intake manifold (2) configured to form an intake passage in the combustion chamber (1), and an EGR valve (5) mounted on the intake manifold (2). EGR pipe (4), breather hose (8) which is in communication with the intake pipe (7) on the upper rocker cover (6) side of the combustion chamber (1), PCV valve (10) on the intake manifold (2) side PCV hose (9), and the atmospheric pressure port (15) and the negative pressure port (16) which are respectively connected to the thermal valve (14), the EGR valve (5), and the purge control valve (17) on the surge tank (3). In the exhaust gas control system composed of first, second, and third nipples (11, 12, 13) connected to (18), on the intake manifold (2), the exhaust gas is reintroduced into the surge tank (3). An EGR delivery pipe 19 is provided to allow the intake manifold 2 to flow back from the tank 3 to the intake manifold 2 at a long distance, while on the breather hose 8, the reverse of the blow-by gas to the intake pipe 7 is provided. That a check valve 22 to prevent the installed features.

Description

Vehicle exhaust and blow-by gas recirculation system for preventing carbon deposition in throttle body

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exhaust gas recirculation apparatus of an automobile, and in particular, the exhaust gas and blow-by-gas of the EGR system which is re-introduced into the throttle body are blocked to prevent the deposition of carbon in the throttle body and is operated in connection with the nipple of the throttle body. The present invention relates to a vehicle exhaust and blow-by-gas recirculation device for preventing carbon deposition in a throttle body that can prevent malfunction of various valves and pollution-reducing parts.

In general, the exhaust gas of an automobile is classified into an evaporative gas, a blow-by gas, and an exhaust gas according to the emission source. The gasoline in the fuel tank is evaporated and released into the atmosphere, and its main component is the same composition as the hydrocarbon (HC) of the fuel used.

In addition, the blow-by gas is a crankcase discharge in which the combustion chamber's mixer or unburned gas flows into the crankcase through a gap between the piston and the cylinder, and the composition thereof is mostly unburned hydrocarbon (HC), and the remainder is combustion gas and Incomplete combustion of mixed gas.

In addition, the exhaust gas is a mixture of fuel and air is combusted in the cylinder of the engine and then released into the atmosphere through the exhaust manifold and the exhaust pipe of the exhaust system, which is generally used as fuel in an internal combustion engine of an automobile. Since most of them are mixtures of hydrocarbons, if the combustion is not completed in the cylinder, inevitably, noxious substances are inevitably released. ) And nitrogen oxides (NO _X ).

Therefore, measures to reduce various emissions have to be taken for automobiles, and as part of the measures to reduce the evaporation gas, the gasoline evaporated gas generated from the mixer forming apparatus or the fuel tank is temporarily stored and then sent to the intake pipe of the engine for combustion. In order to reduce the blow-by gas, a method of reducing the blow-by gas from the crankcase or the cylinder head to the intake cylinder (blow-by-gas reduction device) was common. Various methods such as improvement of engine, improvement of formation mechanism during mixing, improvement of ignition device and control of ignition timing, adoption of aftertreatment system, etc. have emerged.

Meanwhile, exhaust gas recirculation and blow-by gas control systems are included as part of the reduction measures for the exhaust gas. The engine sends some of the unburned exhaust gas discharged through the exhaust system to the intake system to reduce the filling rate of the new mixer in the combustion chamber, thereby reducing the combustion temperature during power administration to reduce the amount of nitrogen oxides in the exhaust gas. The blow-by gas control device is to re-burn the blow-by gas, which is the unburned gas leaked into the crankcase through the gap between the piston and the cylinder, to be sent back to the intake tank without being discharged into the atmosphere.

That is, as shown in FIG. 1, the exhaust gas control system of the vehicle communicates with each of the surge tank 3 and the combustion chamber 1 on the intake manifold 2 forming the intake passage in the combustion chamber 1. An intake pipe (4) is provided independent of the intake manifold (2) and equipped with an EGR valve (5), and in communication with the surge tank (3) on the upper rocker cover (6) side of the combustion chamber (1). A breather hose 8 is installed to communicate with the furnace 7 and a PCV hose 9 having a positive crankcase ventiliation valve 10 is provided on the side of the intake manifold 2. First, second and third nipples (11, 12 and 13) are provided on the tank (3) and the atmospheric open air pressure ports connected to the thermovalve (14) on the first, second and third nipples (11, 12 and 13), respectively. The negative pressure port 16 connected to the 15 and the EGR valve 5 and the negative pressure port 18 connected to the purge control valve 17 are respectively connected.

Therefore, in the conventional exhaust gas recirculation apparatus, the exhaust gas flows into the surge tank 3 through the EGR pipe 4 in the combustion chamber 1 to lower the filling rate of the mixer in the combustion chamber 1, thereby lowering the combustion temperature. The amount of heavy nitrogen oxides is reduced, and in the blow-by gas control device, the blow-by gas, which is unburned gas collected in the rocker cover 6 by flowing into the crankcase through the gap between the piston and the cylinder, is rapidly accelerated or loaded. Each of them is sent back to the inside of the intake manifold (2) via a breather hose (8), and in the case of light or heavy loads via a PCV hose (9).

However, in the vehicle exhaust gas control system of the exhaust gas recirculation device and the blow-by gas control device as described above, the unburned exhaust gas and the blow-by gas are transferred through the EGR line 4, the breather hose 8, and the PCV hose 9, respectively. When the oil is re-introduced into the intake manifold 2, some of the carbon and oil components contained in a large amount of the unburned exhaust gas and blow-by gas are attached to the surge tank 3, and various valves 5, 14, 17) Due to the accumulation of a large amount of nipples (11, 12, 13) to be connected to the connection to cause various types of valves malfunction, the problem of various operability, such as EGR tank and engine relief, and exhaust, Due to the malfunction of the parts to reduce the various harmful substances contained in the gas there was a disadvantage that a large amount of harmful emissions are generated.

Accordingly, the present invention has been made to solve the above drawbacks, by preventing the deposition of carbon in the throttle body by intermittently blocking the exhaust gas and blow-by gas of the EGR system into the throttle body, thereby preventing the throttle body It is an object of the present invention to provide a vehicle exhaust and blow-by-gas recirculation device for preventing carbon deposition in the throttle body, which can prevent malfunction of various valves connected and operated with a nipple provided therein.

1 is a schematic diagram showing the exhaust gas control system of a conventional vehicle,

2 is a schematic diagram showing an exhaust gas control system of a vehicle according to the present invention;

3 shows an intake manifold with the EGR delivery pipe of FIG.

Perspective view.

Explanation of symbols for the main parts of the drawings

1-Combustion chamber 2-Intake manifold

3-surge tank 4-EGR pipeline

5-EGR Valve 6-Locker Cover

7-suction tube with 8-breather hose

9-PCV Hose 10-PCV Valve

11, 12, 13-1st, 2nd, 3nipples

15-Atmospheric port 16-Negative pressure port

17-Purge Control Valve 18-Negative Pressure Port

19-EGR Delivery Pipe 20-EGR Communication Pipe

21-Combustion chamber communication line 22-Check valve

In order to achieve the above object, the present invention provides an intake manifold configured to form an intake passage in a combustion chamber, and an intake manifold so as to communicate with the surge tank and the inside of the combustion chamber, respectively, on the intake manifold. An EGR pipe provided to mount the valve, a breather hose configured to communicate with an intake pipe passage communicating with a surge tank on the upper rocker cover side of the combustion chamber, a PCV hose equipped with a PCV valve on the intake manifold side, and on the surge tank. In the exhaust gas control system of the vehicle consisting of a first open air atmospheric pressure port connected to each of the thermal valve, a negative pressure port connected to the EGR valve and a negative pressure port connected to the purge control valve, the exhaust gas control system of the vehicle, On the manifold, the exhaust gas reflowed from the combustion chamber into the surge tank is introduced from the surge tank to the intake manifold from a long distance. On the other hand, a check valve is installed on the breather hose to prevent backflow of the blow-by gas to the intake pipe passage so as to allow reflow into the combustion chamber.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Figure 2 is a schematic diagram showing the exhaust gas control system of the vehicle according to the present invention, Figure 3 is a perspective view showing the intake manifold with the EGR delivery pipe of Figure 2, the same reference numerals denote the same reference numerals in the prior art The description thereof will be omitted.

As shown in the figure, the combustion chamber (1) on the intake manifold (2) having an independent EGR pipeline (4) extending therein to the surge tank (3) to form an intake passage in the combustion chamber (1). The EGR delivery pipe 19 is installed so that the exhaust gas re-introduced into the surge tank 3 can be introduced into the intake manifold 2 at a long distance from the surge tank 3 and reburned.

Here, as shown in FIG. 3, the EGR delivery pipe 19 is connected to the EGR communication pipe 20 communicating with the EGR pipe 4, and is integrally connected to the EGR communication pipe 20 so that the combustion chambers of each cylinder ( It is formed to have a combustion chamber communication pipe 21 to be communicated with 1).

In addition, on the breather hose 8 provided to communicate between the combustion chamber 1 and the intake pipe 7, the backflow of the blow-by gas to the intake pipe 7 is prevented, thereby allowing reflow into the combustion chamber 1. The check valve 22 which makes it possible to be provided is provided.

Accordingly, the operation of the exhaust gas control system of the vehicle is first performed by the exhaust gas re-introduced into the intake manifold 2 through the EGR line 4 in the combustion chamber 1 to the opening of the EGR valve 5. Accordingly, the combustion chamber 1 is introduced into the intake manifold 2 communicated with each combustion chamber 1 via the EGR communication pipe passage 20 and re-continuously in each combustion chamber 1 through the combustion chamber communication passage 21. As the filling rate of the mixer in the tank decreases, the amount of nitrogen oxides in the exhaust gas decreases as the combustion temperature decreases. Also, the unburned gas collected in the rocker cover 6 flows into the crankcase through the gap between each piston and cylinder. The in blow-by gas is not introduced into the intake pipe path 7 communicating with the surge tank 3 by the check valve 22 installed in the breather hose 8, so that the exhaust blow gas is exhausted to the surge tank 3 as in the prior art. Since gas and blow-by gas are excluded, Nipples 11, which are installed such that some carbon and oil components contained in a large amount of pre-burned exhaust gas and blow-by gas are connected to various valves 5, 14, and 17 mounted on the surge tank 3, 12, 13) can be solved the problem of the malfunction of the valves and the malfunction of the parts to reduce the various harmful substances contained in the EGR tank and engine relief and exhaust gas.

As described above, according to the exhaust gas and blow-by-gas recirculation apparatus of an automobile for preventing carbon deposition in the throttle body according to the present invention, a part of the exhaust gas discharged during operation of the engine is supplied from the combustion chamber to the surge tank. As the incoming EGR line is introduced into the intake manifold without passing the surge tank by the EGR delivery pipe, the blow-by gas also does not flow into the surge tank through the check valve mounted on the breather hose, which includes exhaust gas and blow-by gas. Since some carbon and oil components are not deposited on the nipples installed to connect with the valves mounted on the surge tank, malfunctions of the valves and the harmful substances contained in the EGR tank, engine relief and exhaust gas are caused. There is an effect that can prevent the malfunction of the parts to be reduced.

Claims (2)

An intake manifold 2 configured to form an intake passage in the combustion chamber 1, and an intake manifold 2 so as to communicate with the surge tank 3 and the combustion chamber 1 respectively on the intake manifold 2; The breather is independent and communicates with the intake pipe (7) in communication with the surge tank (3) on the side of the EGR pipe (4), the upper rocker cover (6) of the combustion chamber (1) provided to mount the EGR valve (5) A hose 8, a PCV hose 9 having a PCV valve 10 on the intake manifold 2 side, and an atmospheric open atmospheric pressure port connected to a thermovalve 14 on the surge tank 3, respectively. 15) and first, second, and third nipples (11, 12, 13) provided to be connected to the negative pressure port (16) connected to the EGR valve (5) and the negative pressure port (18) connected to the purge control valve (17). In the exhaust gas control system of the made vehicle, On the intake manifold (2), the EGR delivery pipe (19) for allowing the exhaust gas re-introduced from the combustion chamber (1) to the surge tank (3) to flow back from the surge tank (3) to the intake manifold (2) from a distance. On the other hand, a check valve 22 is installed on the breather hose 8 to prevent backflow of the blow-by gas to the intake pipe path 7 so that reflow into the combustion chamber 1 can be performed. Exhaust and blow-by-gas recirculation system for automobile to prevent carbon deposit in throttle body. The EGR delivery pipe (19) according to claim 1, wherein the EGR delivery pipe (19) is integrally connected to the EGR communication pipe line (20) in communication with the EGR pipe line (4) and the EGR communication pipe line (20) to each in-cylinder combustion chamber (1). An exhaust gas and blow-by-gas recirculation apparatus of a vehicle for preventing carbon deposition in a throttle body, characterized in that it is formed to have a combustion chamber communication pipe (21) to be communicated.