KR100305829B1 - Automotive suction and exhaust system - Google Patents

Abstract

In order to provide a vehicle intake and exhaust device that can reduce the manufacturing cost by simplifying the structure in the combustion chamber,

It consists of a cylinder block, a cylinder head mounted on the cylinder block, and a cylinder head cover for protecting the cylinder head, wherein the cylinder head discharges an intake port and exhaust gas for suctioning the mixer for each combustion chamber. In an engine provided with a plurality of exhaust ports for

An intake port control shaft 13 is inserted into an insertion groove which communicates the end portions of the intake port with each other and interlocks with the crankshaft pulley to control the intake of each cylinder. An exhaust port control shaft 15 is installed to be inserted into the communication groove to communicate with the crankshaft pulley to control the exhaust of each cylinder.

Therefore, opening and closing of each passage is controlled only by the rotation of the intake port control shaft and the exhaust port control shaft installed in the intake port, the exhaust port, thereby simplifying the structure of the combustion chamber, thereby reducing the manufacturing cost.

Description

Automotive Intake and Exhaust System

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an intake and exhaust device for an automobile, and more particularly, to an intake and exhaust device for an automobile in which the intake of the mixer and the exhaust gas are discharged only by the rotation of the intake and exhaust shafts without using a valve mechanism. .

In general, an engine is a device that generates the power required for a vehicle to drive, and its shape is 4-cycle, 2-cycle or in-line, horizontal, V-type or water-cooled, air-cooled depending on the operation, the arrangement of the cylinder, and the cooling method. It can be distinguished, but the basic structure is almost the same.

The engine consists of a cylinder cover, a cylinder head, and a cylinder block. In addition, a passage and the like are provided by a lubrication device, a cooling device, and an intake and exhaust device.

In addition, the engine is provided with a combustion chamber which directly explodes the mixer for generating power, and various valve mechanisms for inhaling the mixer and discharging the combustion gas into the combustion chamber.

Recently, various researches for increasing engine efficiency have been actively conducted, and various combustion chamber structures capable of smoothly inhaling and discharging combustion gas of a mixer have been developed.

Fig. 5 is a sectional view showing a conventional engine structure, which includes a cylinder block 101, a cylinder head 103 mounted on the cylinder block 101, and a cylinder head for protecting the cylinder head 103. The cover 105 is shown.

In the cylinder block 101, a plurality of cylinder chambers having different configurations depending on the type of vehicle are formed, and crank shafts (not shown) are provided in the cylinder block 101 in the width direction.

Each cylinder 107 is accommodated in the said cylinder chamber, The cylinder 107 is connected by the crankshaft and the connecting rod (not shown).

In the cylinder block 103, a series of valve mechanisms including a cam shaft, a rocker arm 109, intake and exhaust valves 111 and 113, a valve spring 115, and the like are provided at a cylinder chamber inlet to form a combustion chamber. The spark plug 117 is installed between the intake valve 111 and the exhaust valve 113 through the cylinder head cover 105.

Therefore, when the intake valve 111 is opened by the rotation of the crankshaft, the mixer is sucked into the combustion chamber through the intake port 119, the mixer is exploded by the compression by the piston and the explosion action by the spark plug, Combustion gas caused by the explosion of the mixer is discharged to the exhaust port 121 by opening the exhaust valve 113.

At this time, the vehicle is driven by using the energy obtained by the continuous action of the suction, compression, explosion and exhaust stroke as the power source.

However, the prior art requires a series of valve mechanisms including camshafts, rocker arms, intake and exhaust valves, valve springs, etc. for the intake of the mixer and the exhaust stroke of the combusted mixer, which results in a complicated structure and thus a component score. There is a problem that the production cost is increased to increase.

In addition, as described above, as the parts are increased, the weight of the vehicle is increased, and the volume of the engine is also increased by mounting the series of valve mechanisms, thereby increasing power loss.

The present invention has been made to solve the problems of the prior art as described above, an object of the present invention is to provide a vehicle intake, exhaust device that can reduce the manufacturing cost simply by the structure in the combustion chamber.

1 is a partial cross-sectional view briefly showing the structure of a vehicle intake and exhaust device for inhaling a mixer into a combustion chamber and exhausting a combustion gas according to the present invention;

2 is a cross-sectional view showing in detail the structure of the intake and exhaust apparatus for a vehicle of FIG.

Figure 3 is a cross-sectional view showing the mounting state of the intake port control shaft or exhaust port control shaft of the present invention;

4 is a view showing an operating state of the intake port control shaft and the exhaust port control shaft of the present invention according to the driving of the engine;

5 is a sectional view showing a conventional combustion chamber structure.

<Explanation of symbols for the main parts of the drawings>

1: cylinder block 3: cylinder head 5: cylinder head cover

9: intake port 11: exhaust port 13: intake port control shaft

15: exhaust port control shaft 19, 21: rotary gear 24: bearing

27,29,31,33: Mixer suction hole

In order to achieve the above object of the present invention, the present invention comprises a cylinder block, a cylinder head mounted on the cylinder block, and a cylinder head cover for protecting the cylinder head. In an engine in which a plurality of intake ports for injecting a mixer and an exhaust port for discharging exhaust gas are formed in each combustion chamber, the cylinder is inserted into an insertion groove which communicates with the distal end portion of the intake port, and interlocks with a crankshaft pulley, An intake port control shaft is installed to control the intake air.

In addition, the exhaust port is provided with an exhaust port control shaft which is inserted into an insertion groove which communicates with the distal end portions of the exhaust port and interlocks with the crankshaft pulley to control the exhaust of each cylinder.

Therefore, the intake port and the exhaust port of each combustion chamber can be controlled only by the rotation of the intake port control shaft and the exhaust port control shaft.

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

FIG. 1 is a partial cross-sectional view schematically showing the structure of a vehicle intake and exhaust device for inhaling a mixer into a combustion chamber and exhausting a combustion gas according to the present invention, on a cylinder block 1 and the cylinder block 1 described above. The cylinder head 3 provided and the cylinder head cover 5 for protecting the said cylinder head 3 are shown.

In the cylinder block 1, a plurality of cylinder chambers having different configurations depending on the type of vehicle are formed, and crank shafts (not shown) are provided in the cylinder block 1 in the width direction.

Each cylinder 7 is accommodated in the said cylinder chamber, The cylinder 7 is connected by the crankshaft and the connecting rod 6.

The cylinder head 3 is provided with a plurality of intake ports 9 and exhaust ports 11 for each cylinder chamber, and each of the intake ports 9 and exhaust ports 11 is arranged in the order of cylinders burned. Therefore, the intake port control shaft 13 and the exhaust port control shaft 15 for controlling them are provided.

The spark plug 17 provided from the cylinder head cover 5 is mounted between the intake port 9 and the exhaust port 11 described above.

FIG. 2 is a cross-sectional view illustrating in detail the structure of the intake and exhaust apparatus for a vehicle of FIG. 1.

That is, the intake port control shaft 13 and the exhaust port control shaft 15 provided in each of the intake port 9 and the exhaust port 11 are coupled to the rotary gears 19 and 21, respectively, and the rotary gears thereof. 19 and 21 are connected to the crankshaft pulley (not shown) by the timing belt 23 shown by the dashed-dotted line in the figure.

Therefore, when the crankshaft rotates, the rotational force is transmitted to each of the rotary gears 19 and 21 as it is, thereby rotating the rotary gears 19 and 21, which results in the respective intake port control shaft ( 13) and the exhaust port control shaft 21 is rotated.

Figure 3 is a cross-sectional view showing in detail the structure of the intake port control shaft of the present invention, various types of engines have been developed in order to cope with the increase in the size of the vehicle body or to improve the engine performance. Adopt.

That is, a rotary gear 19 is mounted at one end of the intake port control shaft 13 so that the intake port control shaft 13 can rotate synchronously according to the rotational movement of the rotary gear 19. .

The outer periphery of the intake port control shaft 13 is provided with a bearing 24 so as to smoothly rotate the intake port control shaft 13.

Oil rings 25 are provided on both sides of the bearing 24 at predetermined intervals. The oil ring 25 is installed to prevent leakage of the lubricant in the aforementioned bearing 24 to the outside.

In the present embodiment, three bearings 24 are provided, but of course, the bearings 24 can be appropriately disposed as necessary.

In the intake port control shaft 13, the mixer suction holes 27, 29, 31, and 33 are formed to suck the mixer into each combustion chamber. According to the combustion chamber arrangement order, the first suction hole 27, the second suction hole 29, the third suction hole 31, and the fourth suction hole 33).

The first suction groove 27 is formed at a position that can penetrate the first cylinder when the intake port control shaft 13 rotates, and the second suction groove 29 contacts the second cylinder when rotating. It is formed in a position to be able.

The first suction groove 27 and the second suction groove 29 are formed to face each other, and they are connected to each other by a communication hole 30.

In addition, the third suction groove 31 is formed at a position that can penetrate with the third cylinder when the intake port control shaft 13 rotates, and the fourth suction groove 33 is in contact with the second cylinder when rotating. It is formed in a position to be able to.

The third suction groove 31 and the fourth suction groove 33 are formed to face each other, and they are connected to each other by a communication hole 34.

As described above, the first suction grooves 27 and 29 and the third and fourth suction holes 31 and 34 connected to each other are obliquely communicated with each other, and they each have a phase angle of 90 °.

Here, only the intake port control shaft is described and the description of the exhaust port control shaft is omitted. However, in comparison with the intake port control shaft, only the arrangement direction of the discharge holes 1 and 2 and the discharge holes of the discharge holes 3 and 4 are opposite to each other. The rest of the configuration is the same and the description is omitted.

Hereinafter, the operation of the present invention will be described with reference to FIG.

First, since the engine employed in this embodiment is a four-cylinder engine in series, it is to be exploded in the order of cylinder 2-4-1-3, and the intake port control shaft 13 and exhaust port control shaft 15 The upper portion will be described as the intake / exhaust port side and the lower portion of the intake port control shaft 13 and exhaust port control shaft 15 as the combustion chamber side.

In addition, (a), (b), (c), and (d) of the drawings show the states of the intake port control shaft 13 and the exhaust port control shaft 15 according to the combustion sequence of 2-4-1-3, respectively. It is shown sequentially.

That is, as shown in FIG. 4 (a), the first intake port control shaft 13 has the first suction groove 27 toward the intake port side, and the second suction groove 29 disposed in the direction opposite thereto is the second. Since it passes through the combustion chamber, the mixer entering the exhaust port flows into the first suction groove 27 and is transferred to the second suction groove 29 along the communication groove 30.

Therefore, the mixer conveyed to the second suction groove 29 flows into the second cylinder, and the second cylinder is exploded by the mixer.

At this time, the third and fourth suction grooves 31 and 33 are installed in a direction perpendicular to the first and second suction grooves 27 and 29, and thus, the remaining suction passages except for the second suction groove 29 are provided. Are all closed.

At the same time, the exhaust port control shaft 15 has the third discharge groove 35 penetrating through the third cylinder, and the fourth discharge groove 37 faces the exhaust port side. The generated exhaust gas is transferred to the fourth discharge groove 37 along the communication hole 36 to perform an exhaust stroke.

At this time, since the first discharge groove 39 and the second discharge groove 41 are located in the vertical direction with these, all the cylinders except the third cylinder is closed.

Then, the exhaust port control shaft 13 rotated by 90 ° by the crankshaft after the second cylinder explosion as shown in FIG. 4 (b) enters the mixer into the suction groove 33 through the suction groove 31 through the fourth. Explode the number 4 cylinder.

At this time, the exhaust port control shaft 15 is also rotated 90 ° by the first exhaust groove 39 by opening the second exhaust groove 41 of the combustion gas of the second cylinder after the explosive stroke in the above (a). To be discharged.

The intake port control shaft 13 and the exhaust port control shaft 15 are then rotated again by 90 ° so that the mixer is fed into the intake groove 27 through the intake groove 29 through the intake port 29 as in (c). The explosive stroke of the 2nd cylinder is carried out by conveyance, and the combustion gas is conveyed to the 3rd discharge groove 35 and discharged by opening the 4th discharge groove 37.

After the operation as described above, the intake port control shaft 13 and the exhaust port control shaft 15 are again rotated by 90 °, and as shown in (d), the third suction groove 31 through the fourth suction groove 33. The explosive stroke of the third cylinder is carried out by transferring the mixer, and the combustion gas is transferred to the second discharging groove 41 and discharged by opening the first discharging groove 39.

By the above operation, an explosion stroke of the engine occurs in the order of the cylinder of 2-4-1-3, and the combustion gas generated in the explosion stroke is smoothly discharged to the exhaust port.

In the above, the operation of (a), (b), (c), and (d) has been described separately in order to explain the operation process in detail.

In the present embodiment, the number and arrangement of the suction grooves and the discharge grooves are as described above, but the present invention is not limited thereto, and various modifications within the scope not departing from the spirit of the claims according to the shape of the engine and Modifications can be made.

According to the present invention, the opening and closing of each passage is controlled only by the rotation of the intake port control shaft and the exhaust port control shaft installed in the intake port, the exhaust port, thereby simplifying the structure of the combustion chamber, thereby reducing the manufacturing cost.

Claims (3)

It consists of a cylinder block, a cylinder head mounted on the cylinder block, and a cylinder head cover for protecting the cylinder head, wherein the cylinder head discharges an intake port and an exhaust gas for sucking the mixer in each combustion chamber. In an engine provided with a plurality of exhaust ports for The intake port controls the intake of each cylinder by forming a mixer inlet hole which is inserted into an insertion groove which communicates with the distal end portions of the intake port so as to interlock with the crankshaft pulley and controls two combustion chamber intakes adjacent to each other. The intake port control shaft is provided, and the exhaust port is inserted into an insertion groove which communicates with the distal end portion of the exhaust port, and interlocks with the crankshaft pulley to form combustion gas discharge holes for controlling two combustion chamber exhausts adjacent to each other. By the exhaust port control shaft for controlling the exhaust of each cylinder, The mixer suction hole and the combustion gas discharge hole of the intake port control shaft and the exhaust port control shaft are in communication with cylinder number 1 and cylinder number 2, cylinder number 3 and cylinder number 4, respectively. And a combustion gas discharge hole is formed at a predetermined position to penetrate the combustion chamber when the shaft rotates. The motor vehicle according to claim 1, wherein the first cylinder side, the second cylinder side, the third cylinder side, and the fourth cylinder side of the mixer suction hole and the combustion gas discharge hole communicate with each other at a phase angle of 90 degrees, respectively. Intake and exhaust system. According to claim 1, wherein the intake port control shaft and the exhaust port control shaft is provided with at least one or more bearings so as to facilitate the rotational movement of each shaft, both sides of the bearing lubricating oil in the mixer suction hole or combustion gas discharge Intake and exhaust device for a vehicle, characterized in that the oil ring is installed to prevent the flow into the hole.