KR100309443B1 - Intake Manifold Structure Of Internal Combustion Engine - Google Patents

Abstract

The present invention relates to an intake manifold structure of an internal combustion engine, and includes a surge tank (105) for storing a mixer and a runner (110) conduit from the surge tank (105) and connected to a cylinder block. In the intake manifold structure of the internal combustion engine that allows the blower gas and the unburned gas to flow directly into the runner 110 on the runner 110 side, the flange 110a of the runner 110 connected to the cylinder block. A connection part 120 formed to have an inlet 115 for introducing exhaust gas at one end thereof; A valve unit 130 connected to the first connection pipe 125 that is connected to the conduit so as to communicate with the inlet 115 of the connection part 120, and having a valve that is opened and closed by ECU control; A second connecting pipe 145 communicated with and discharged from the outlet 140 of the valve unit 130; An exhaust gas passage part 155 connected in communication with the second connecting pipe 145 and formed to have runner-specific holes 150 at an inlet side of the runner 110; A blow-by gas passage part 165 having a hole 160 formed at a lower end of the exhaust gas passage part 155 so that blow-by gas is introduced into each runner 110 of the intake manifold 100; 100) is formed integrally, so that the amount of gas flowing into each runner is made uniform and the mixing time with the mixer is made earlier than the mixing time is introduced into the combustion chamber, thereby improving engine performance. In addition, it is possible to suppress the generation of unburned gas and further prevent pollution.

Description

Intake Manifold Structure Of Internal Combustion Engine

The present invention relates to an intake manifold structure of an internal combustion engine, and more particularly, a passage for recirculating exhaust gas is formed at an inlet side of a runner that is conduited to the intake manifold, and blow-by gas is formed for each runner during the runner's piping. The present invention relates to an intake manifold structure of an internal combustion engine configured to integrally form an inflow manifold with an intake manifold so as to improve engine performance and reduce pollution prevention.

In general, the blow-by-gas reduction device of an internal combustion engine is very common in an engine of an automobile recently, and introduces a combustion gas mixed with combustion gas and a combustion gas that have leaked into a crankcase into an intake pipe again to be reburned.

For example, while the engine is running, some amount of new exhaust gas or mixer is introduced from the combustion chamber into the crankcase, which is a strong acid gas composed of mixed gas and combustion gas. It is included in such blowby gas.

As a result, the engine oil becomes thin or deteriorated due to heat, moisture of combustion gas, gasoline, etc., and sludge is produced.

In order to prevent this, in the past, a ventilator called an air breather was installed in the crankcase and released into the atmosphere. However, the gas contains a large amount of hydrocarbons as a source of air pollution. It is forcibly introduced into the intake cylinder and sent to the combustion chamber for recombustion.

1 is a view illustrating a typical blow-by gas reducing device, and as shown, the air cleaner 2 and the surge tank 6 of the intake manifold 4 are connected to the air intake hose 8. The surge tank 6 is connected to the cylinder block 12 by the runner 10.

The cylinder head cover 14 is connected to the air intake hose 8 and the breather hose 16, while the cylinder head cover 14 is connected to the surge tank 6 of the intake manifold 4. (Positive Crankcase Ventilation Valve) 18 and the Ventilation Hose 20 are connected.

Thus, the blow-by gas reducing device connected in this way is the cylinder block 12, the cylinder head cover 14, the PCV valve 18, when the blow-by gas in the crankcase 22 introduced from the combustion chamber is light or heavy. The ventilation hose 20 and the intake manifold 4 are sent to the runner 10 through the surge tank 6 and through the breather hose 16 at rapid acceleration and high load to the combustion chamber for combustion with the fuel.

2 is a view illustrating a part of an exhaust gas recirculation apparatus of an internal combustion engine, and a surge tank 26 of an intake manifold 24 into which air is introduced through an air cleaner (not shown) as shown in FIG. One end of the runner 28 connected to one side of the surge tank 26 to send the mixer to the combustion chamber, and one end of the surge tank 26 of the intake manifold 24 and the exhaust port (not shown). EGR pipe 30 is mounted. The EGR pipe 30 is a pipe for sending a part of the exhaust gas to the surge tank 26 of the intake manifold 24 to be introduced into the combustion chamber together with the mixer.

This method is widely used to reduce nitrogen oxides in the exhaust gas. Since nitrogen oxides increase rapidly when the engine temperature is high, when a part of the exhaust gas is combusted with the mixer, the supplied exhaust gas is no longer burned. It will not be possible to lower the combustion temperature.

Such exhaust gas recirculation device is effective to reduce nitrogen oxide, but it has side effects such as poor ignition of the mixer and decrease of engine output. It will not be recycled at full load.

That is, recycling is mainly performed in a relatively thin mixer state at partial load.

In the exhaust gas circulating device configured as described above, the exhaust gas discharged through the exhaust port during the exhaust stroke flows into the surge tank 26 of the intake manifold 24 through the EGR pipe 30 connected to the exhaust port. The exhaust gas introduced into the gas 26 and the new mixer are mixed with each other and introduced into the combustion chamber not shown through the runner 18.

As described above, both the blow-by gas reducing apparatus of FIG. 1 and the exhaust gas recirculating apparatus of FIG. 2 flow gas (blow-by gas and exhaust gas) into the surge tanks 6, 26 of the intake manifolds 4, 24. The gas is introduced into the combustion chamber through the runners 10 and 18 to be oxidized, but the gas is introduced into the surge tanks 6 and 26 so that the mixing time with the mixer is shorter than the time into the combustion chamber. The amount of gas to be made is not constant.

Therefore, there is a problem in that the engine performance is lowered during combustion, because the amount of gas in each combustion chamber is different, and the amount of unburned gas is also increased due to the gas flowing in an unbalanced manner, causing pollution.

Accordingly, the present invention has been made in order to solve the above problems, the performance of the engine by forming a passage to directly flow blow-by gas and exhaust gas for each runner of the intake manifold communicating with each combustion chamber of the engine The purpose of the present invention is to provide an intake manifold structure of an internal combustion engine which can improve pollution control and prevent pollution by suppressing the generation of unburned gas.

In order to achieve the above object, the present invention provides a blow-by gas and unburned gas directly on the runner side of the intake manifold consisting of a surge tank storing a mixer and a runner conduit from the surge tank and connected to the cylinder block. An intake manifold structure of an internal combustion engine, the inlet manifold comprising: a connecting portion having an inlet for introducing exhaust gas into one end of a flange of a runner connected to the cylinder block; A valve unit having a valve connected to a first connection pipe connected to the first connection pipe in communication with an inlet of the connection unit and opened and closed by ECU control; A second connecting pipe connected to the outlet of the valve and connected to the pipe; An exhaust gas passage part connected to the second connection pipe and formed to have a runner-specific hole at an inlet side of the runner; And a blow-by gas passage portion formed at a lower end of the exhaust gas passage portion so that blow-by gas flows into each runner of the intake manifold.

The outer circumferential surfaces of the exhaust gas passage and the blow-by gas passage are provided with a processing portion formed so that the processing hole for forming a hole communicates with the passage portion, and comprises a plug provided to block the processing hole. .

1 is a schematic view showing a conventional example of a blow-by gas reducing apparatus;

Figure 2 is a schematic diagram showing a part of the exhaust gas recirculation apparatus of the conventional internal combustion engine

3 is a front view showing the intake manifold structure of the internal combustion engine according to the present invention;

4 is a plan view showing the intake manifold structure of the internal combustion engine according to the present invention;

Figure 5 is a side view showing the intake manifold structure of the internal combustion engine according to the present invention

6 is a cross-sectional view showing an exhaust gas passage part of the intake manifold structure of the internal combustion engine according to the present invention;

Figure 7 is a cross-sectional view of the internal combustion engine according to the present invention the blow-by gas passage portion of the intake manifold structure

8 is a side cross-sectional view of an intake manifold structure of an internal combustion engine according to the present invention;

Explanation of symbols on the main parts of the drawings

100: intake manifold 105: surge tank

110: runner 110a: flange

115, 135: inlet 120: connection

125: first connecting pipe 130: valve portion

140: outlet 145: second connecting pipe

150, 160: hole 155: exhaust gas passage section

165: blow-by gas passage 170, 170a: processing hole

175, 175a: processing part 180: plug

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

3 to 8 are front to side cross-sectional views showing the intake manifold structure of the internal combustion engine according to the present invention.

As shown, the tip of the runner 110 of the intake manifold 100 including the surge tank 105 storing the mixer and the runner 110 having a plurality of passages from the surge tank 105 is a cylinder block (not shown). ) Is connected to the flange (110a) portion, one side of the flange (110a) is provided with an extension portion 120 that forms an inlet (115) for introducing the exhaust gas discharged after combustion from the combustion chamber of the engine, The valve unit 130 is connected to the first connecting pipe 125 which is conduit communicated from the inlet 115 of the connecting portion 120 and coupled with the valve device that is opened and closed by the control of the ECU corresponding to the full load and the partial load. ) Is equipped.

The valve unit 130 has an inlet port 135 and the exhaust gas introduced into the inlet port 135 in communication with the first connecting pipe 125, which is in communication with the inlet port 115 of the connecting portion 120 is the valve device. Discharge port 140 is formed to be discharged via.

In addition, the second connecting pipe 145 is conduit-equipped to communicate with the outlet 140, and communicates with the other side of the second connecting pipe 145, the runner 110 inlet of the intake manifold 100 The exhaust gas passage portion 155 having the hole 150 communicated with the runner 110 is formed.

The connection part 120, the first and second connection pipes 125 and 145, the valve part 130, and the exhaust gas passage part 155 are integrally formed in the intake manifold 100.

In addition, the lower end of the exhaust gas passage 155 is connected to the other end of the pipe (not shown) connected to discharge the blow-by gas discharged to the cylinder head cover (not shown) side when the engine is burned at one end thereof, A blow-by gas passage part having a hole 160 formed therein to communicate with each runner 110 so that the blow-by gas introduced through the pipe can be directly introduced into each runner 100 of the intake manifold 100. 160 is integrally molded to the intake manifold 100.

At this time, the outer peripheral surface of the exhaust gas passage 155 and the blow-by gas passage 165 to form the holes (150,160) in communication with the runner 110 side the passage portion (exhaust gas passage and blow-by gas cylinder) And processing portions 175 and 175a having processing holes 170 and 170a formed therein to communicate with the furnace portions 155 and 165.

Meanwhile, after processing the exhaust gas passage part 155 and the holes 150 and 160 of the blow-by gas passage part 165 through the processing holes 170 and 170a of the processing parts 175 and 175a, the exhaust gas and the blow-by gas are processed. The plug 180 is blocked so as not to be discharged through the holes 170 and 170a.

The exhaust gas passage part 155 and the blow-by gas passage part 165 will be described below with reference.

The exhaust gas passage part 155 and the blow-by gas passage part 165 may be formed in the hollow part, that is, the exhaust gas passage part 155 and the blow-by gas passage part 165 during the injection of water from the casting. It will be equipped with a core which is a mold shaped like a cavity for making a mold.

At this time, when the core is removed, the exhaust gas passage 155 and the blow-by gas passage 165 are formed. Thereafter, in order to form holes 150 and 160 formed in the exhaust gas passage part 155 and the blow-by gas passage part 165, that is, holes 150 and 160 penetrated toward the runner 110, the exhaust gas passage part 155 is formed. The outer peripheral surface of the blow-by gas passage part 165 is provided with the above-mentioned processing parts 175 and 175 a, and these processing parts 175 and 175 a pass through the exhaust gas passage part 155 and the blow-by gas passage part 165. The processing holes 170 and 170a are formed.

Accordingly, the holes 150 and 160 of the exhaust gas passage part 155 and the blow-by gas passage part 165 are formed as a hole processing tool through the processing holes 170 and 170a of the processing parts 175 and 175a.

The present invention constructed as described above is an intake manifold structure which is mounted on the engine side and recycles exhaust gas or blow-by gas generated after combustion back to the intake manifold side, as shown in FIGS. A part of the exhaust gas, which is integrally formed with the intake manifold 100 and combusted in the combustion chamber, flows into the inlet port 115 of the connection part 120 that is extended to the flange 110a, which is the tip of the runner 110, and is connected to the first connection. It flows into the inlet 135 side of the valve unit 130 along the pipe 125. The exhaust gas introduced to the inlet 135 of the valve unit 130 is discharged through the outlet 140 of the valve unit 130 when the valve is opened by the opening / closing of the valve.

The exhaust gas discharged through the discharge port 140 flows into the exhaust gas passage part 155 along the second connection pipe 145 which is connected to the exhaust gas passage part 155.

The exhaust gas introduced into the exhaust gas passage 155 flows into the runner 100 through the hole 150 formed at the inlet side of the runner 110 in the same amount, and the exhaust gas flows into the runner 100 inlet side. Gas is mixed into each combustion chamber together with the mixer introduced into the surge tank 105 of the intake manifold 100.

In addition, when the engine of the engine is opened, the valves of the pipes, each end of which is connected to the blow-by gas passage portion 165 integrally formed on the cylinder head cover side and the intake manifold 100, are opened. Through the blow-by gas passage 165 is introduced.

The blow-by gas introduced into the blow-by gas passage part 165 is distributed in the same amount to each runner 110 through the hole 160 communicating with the runner 110 and mixed with the mixer to the combustion chamber side.

Meanwhile, the processing holes 170 and 170a of the processing parts 175 and 175a formed on the outer circumferential surfaces of the exhaust gas passage part 155 and the blow-by gas passage part 165 are firmly blocked by the plug 180 so as not to flow out during gas circulation. have.

As described above, since the exhaust gas passage portion and the blow-by gas passage portion having holes communicating with the runner side of the intake manifold are formed, the amount of gas flowing into each runner can be equally mixed.

As described above, since the exhaust gas passage portion and the blow-by gas passage portion having holes communicating with each runner of the intake manifold are integrally formed, the amount of gas flowing into each runner is made uniform and mixed with the mixer. Since the time is made earlier than the time that the mixer is introduced into the combustion chamber can improve the performance of the engine, and further has the effect of preventing the pollution by suppressing the generation of unburned gas.

Claims (2)

Blow-by gas and unburned gas on the runner 110 side of the intake manifold 100 composed of a surge tank 105 for storing a mixer and a runner 110 conduit from the surge tank 105 and connected to the cylinder block. In the intake manifold structure of the internal combustion engine to allow the inflow of the runner 110 directly, A connection part 120 formed to have an inlet port 115 for introducing exhaust gas into one end of a flange 110a of the runner 110 connected to the cylinder block; A valve unit 130 connected to the first connection pipe 125 that is connected to the conduit so as to communicate with the inlet 115 of the connection part 120, and having a valve that is opened and closed by ECU control; A second connecting pipe 145 communicated with and discharged from the outlet 140 of the valve unit 130; An exhaust gas passage part 155 connected in communication with the second connecting pipe 145 and formed to have runner-specific holes 150 at an inlet side of the runner 110; A blow-by gas passage part 165 having a hole 160 formed at a lower end of the exhaust gas passage part 155 so that blow-by gas is introduced into each runner 110 of the intake manifold 100; Intake manifold structure of an internal combustion engine, characterized in that formed integrally with 100). The method of claim 1, Machining parts 175 and 175a formed on the outer circumferential surfaces of the exhaust gas passage part 155 and the blow-by gas passage part 165 so that the processing holes 170 and 170a for forming the holes 150 and 160 communicate with the passage parts 155 and 165. Is provided, the intake manifold structure of the internal combustion engine, characterized in that comprises a plug (180) provided to block the processing holes (170, 170a).