WO2010002172A2

WO2010002172A2 - Apparatus for automatic control of exhaust pressure of an internal combustion engine

Info

Publication number: WO2010002172A2
Application number: PCT/KR2009/003544
Authority: WO
Inventors: 장영근
Original assignee: Jang Young Geun
Priority date: 2008-07-03
Filing date: 2009-06-30
Publication date: 2010-01-07
Also published as: US20110126532A1; WO2010002172A3; KR100885903B1

Abstract

The present invention relates to an apparatus for automatic control of the exhaust pressure of an internal combustion engine, comprising: a body having an inlet and an outlet for exhaust gas; a pressure control plate, which is a thin plate, which is disposed between the inlet and outlet in the body, and which is designed to rotate, within a predetermined range of angle, perpendicular to the ground; a rotational shaft, which is bar-shaped and which is coupled with one side of the pressure control plate to allow a substantially vertical and rotational movement of the pressure control plate; first and second side members provided at both outer sides of the body to be coupled, via through holes, with protrusions of the rotational shaft which extend outwardly from both sides of the rotational shaft; a regulation pendulum coupled with the first side member to set an initial slope of the pressure control plate; and pendulum blades, which are coupled with the lower side of the regulation pendulum to operate vertically and rotatably within a preset range of angle by air resistance generated during running of a vehicle, and allow the pressure control plate to make vertical and rotational movements in linkage with the vertical and rotational operation.

Description

Automatic adjustment of exhaust pressure of internal combustion engine

The present invention relates to an apparatus for automatically adjusting the exhaust pressure of an internal combustion engine, and more specifically, the pressure adjusting plate is configured to rotate corresponding to the speed of the vehicle within a predetermined angle range, thereby automatically adjusting the opening and closing degree of the exhaust passage. The present invention relates to an apparatus for automatically adjusting the exhaust pressure of an internal combustion engine, which creates an optimal exhaust pressure environment according to the output of the internal combustion engine.

A typical four-stroke cycle of an internal combustion engine consists of intake, compression, explosion and exhaust. Looking at the stroke from exhaust to intake, the intake valve is opened and the exhaust valve is closed during intake, and there is a valve overlap period in which both the intake and exhaust valves are opened for a very short time before the exhaust valve is closed. This is because valve overlap can be used to quickly drain residual exhaust gas and allow for fresh intake air to flow smoothly.

In internal combustion engines, increasing the exhaust pressure during low-speed rotation can result in fuel savings and increased output.

The reason is that the combustion gas is not rapidly discharged when the piston proceeds downward when the valve overlap occurs, so that the piston exerts a downward force to some extent by the residual gas, thereby increasing the rotational torque and reburning the incompletely burned fuel. Because it can increase the engine efficiency.

However, since the piston reciprocates at a very high speed during high speed rotation of the internal combustion engine, high exhaust pressures rather impede the lifting force of the piston at the end of the valve overlap.

Therefore, the internal combustion engine increases exhaust pressure at low rotational speed, and lowers exhaust pressure at high rotational speed to increase engine efficiency and to increase power output.

However, in the exhaust pipe of an internal combustion engine installed in a general vehicle, the diameter of the exhaust pipe is determined based on the displacement amount at the maximum output by the explosion stroke of the engine.

Accordingly, when the internal combustion engine rotates at a low speed, the exhaust pipe becomes larger than necessary so that the exhaust pressure becomes lower than necessary, so that a large amount of fuel is incompletely burned and discharged when the valve overlaps, and the engine output is reduced.

That is, since the exhaust system of the conventional internal combustion engine uses an exhaust pipe having a fixed size, there is no means for synchronizing the exhaust pressure with the output of the internal combustion engine in response to valve overlap. Was consumed more than necessary and the engine power was deteriorated.

In order to solve the above problems, conventionally configured to automatically adjust the opening and closing amount of the exhaust valve according to the exhaust pressure detected by the sensor using an exhaust pressure sensor, a motor and a drive gear, or to a plurality of exhaust pipes of different sizes And a method of varying the exhaust path in accordance with the exhaust pressure has been proposed.

However, the above method has a problem in that the configuration is not simple, and the entire exhaust pipe must be replaced in the installation, and in particular, the cost is increased by additional provision of a detection sensor.

The present invention has been made to solve the above problems, an object of the present invention is to automatically adjust the opening and closing amount of the exhaust passage in accordance with the exhaust pressure to increase the exhaust pressure at low speed rotation, exhaust pressure at high speed rotation By lowering the valve overlap effectively, it is possible to provide an exhaust pressure automatic control device that can increase engine efficiency.

Still another object of the present invention is to provide an exhaust pressure automatic control device which can be easily detached from an exhaust pipe installed in a vehicle, has a simple structure, has a low failure rate, is easy to install, and can be manufactured at low cost. will be.

Automatically adjusting the exhaust pressure of the internal combustion engine according to the present invention for achieving the above object is inserted into the middle region of the exhaust pipe, one side is formed with an inlet for introducing the exhaust gas discharged from the internal combustion engine, The other side opposite to the inlet body is formed with a discharge port for discharging the exhaust gas flows to the outside; A thin plate-like member, the pressure control plate is disposed between the inlet and the discharge port inside the body, and configured to be rotatable in a vertical direction with the ground within a predetermined angle range; A rod-shaped member, coupled to one side of the pressure regulating plate to enable a substantially vertical rotational movement of the pressure regulating plate, the rotating shaft being configured to protrude a predetermined portion through through holes formed on both sides of the body; A first side member and a second side member which are provided on both outer surfaces of the body and coupled to the protrusions of the rotating shaft which extend outwardly through both sides through the through holes; An adjustment weight coupled with the first side member to set an initial tilt of the pressure control plate; And a wing shape so as to sufficiently receive air resistance, and is coupled to the lower side of the adjustment weight to operate vertical rotation within a predetermined angle range by air resistance generated during driving of the vehicle, in conjunction with the vertical rotation operation. The pressure control plate is also configured to include a vane to allow vertical rotation to occur.

According to the apparatus for automatically adjusting the exhaust pressure of an internal combustion engine according to the present invention, the opening and closing amount of the exhaust passage is automatically adjusted to increase the exhaust pressure at low speed rotation, and to reduce the exhaust pressure at high speed rotation to effectively cope with valve overlap. It is able to optimize exhaust pressure by interlocking with the change of output of internal combustion engine, that is, the rotational speed, and accordingly, the combustion efficiency of fuel increases, so that the smoke is drastically reduced, fuel cost is reduced, and it rotates at high speed and low speed driving. There is a remarkable effect that the torque is increased to increase the sense of stable running.

In addition, it can be easily attached and detached to the exhaust pipe already installed in the vehicle, the structure is simple, the failure rate is low, the installation is easy, there is a remarkable effect that can be manufactured at low cost.

In addition, according to the driving speed of the vehicle is configured to automatically adjust the opening and closing amount of the exhaust passage by using the drag generated in the gain according to the present invention, the driver can maximize the engine efficiency and drive the vehicle without special care There is a significant effect that can be.

In addition, the apparatus for automatically adjusting the exhaust pressure of the internal combustion engine according to the present invention can easily operate the initial inclination setting of the pressure regulating plate and the up / down position adjustment of the vane through the adjustment weight, so that various sizes of exhaust pipes installed in various vehicles can be changed. In this regard, there is a remarkable effect that it can easily respond to create an optimum exhaust pressure environment.

1 is an exploded perspective view showing the configuration of the automatic pressure control device of the internal combustion engine according to the present invention.

FIG. 2 is an assembly view of FIG. 1.

3 (a), (b) and (c) is an operation diagram showing a sequence in which the exhaust pressure automatic control device according to the present invention is operated in accordance with the running speed of the vehicle.

** Description of symbols for the main parts of the drawing **

10: body 11: inlet

13 discharge port 20 pressure control plate

25: rotating shaft 30: adjustment weight

40: profit 50: first side member

60: second side member 70: tightening bolt

80a, 80b: Fastening nut

The apparatus for automatically adjusting the exhaust pressure of the internal combustion engine according to the present invention automatically adjusts the opening and closing amount of the exhaust passage according to the exhaust pressure to automatically increase the exhaust pressure at low speed rotation, and to reduce the exhaust pressure at high speed rotation to efficiently overlap the valve. It is configured to respond.

1 is an exploded perspective view showing the configuration of the automatic exhaust pressure adjusting apparatus according to the present invention, Figure 2 is an assembly view of FIG.

1 and 2, the exhaust pressure automatic control device according to the invention the body (10); Pressure control plate 20; It is configured to include the adjustment weight 30 and the weight 40.

The core idea of the automatic exhaust pressure regulating device according to the present invention is configured so that the pressure regulating plate 20 can rotate to correspond to the speed of the vehicle within a predetermined angle range, by automatically adjusting the opening and closing of the exhaust passage to the internal combustion engine The optimum exhaust pressure environment is created according to the output of.

The body 10 according to the present invention is configured to accommodate the pressure control plate 20 therein and to be inserted into an intermediate region of the exhaust pipe so as to vary the exhaust pressure. One side of the body 10 is formed with an inlet 11 for introducing the exhaust gas discharged from the internal combustion engine, the other side opposite to the inlet discharge port 13 for exporting the introduced exhaust gas to the outside Is formed.

The inlet 11 and the outlet 13 are configured to have a cylindrical shape corresponding to the general shape of the exhaust pipe so that the body 10 can be easily coupled to the pipe of the exhaust pipe, or flexibly correspond to various exhaust pipe sizes It is preferable that the vertex area be configured into a truncated cone shape so that it can be inserted and coupled.

According to the present invention, the pressure regulating plate 20 is a thin plate-shaped member, and one side of the pressure regulating plate 20 is coupled to a rotating shaft 25 having a rod shape, between the inlet and the discharge port 13 of the body 10. It is located at.

The pressure control plate 20 provided in the body 10 is configured to be rotatable in the vertical direction with the ground within a predetermined angle range in accordance with the gas pressure discharged from the internal combustion engine.

The rotating shaft 25 coupled to one side of the pressure control plate 20 to enable the rotation operation of the pressure control plate 20 is a predetermined portion through the through holes (15a, 15b) formed on both sides of the body (10) It is configured to protrude.

Protruding

portions

25A and 25B extending to the outside through the through

holes

15a and 15b are coupled to the first side member 50 and the second side member 60 provided on both outer surfaces of the body 10. do.

The first side member 50 and the second side member 60 can be stably rotated at a fixed position without the left and right movements of the rotating shaft 25 extending through the both side through

holes

15a and 15b. It plays a role.

Steps for connecting the adjustment weight 30 to the rotary shaft 25 and the rotary shaft 25 fixedly coupled to the first side member 50 in the first side member 50 according to the present invention ( 51 is protruded in a layered shape.

The stepped part 51 has two bolt fastening holes 53 and 55 and a receiving hole 51a for accommodating the protrusion 25A of the rotary shaft 25 therein.

Protruding portion 25A of the rotating shaft 25 accommodated inside the stepped portion 51 is a tightening bolt 70 and the adjustment weight (70) inserted into the bolt fastening holes (53, 55) formed in the stepped portion (51) 30 is fixedly coupled to the first side member 50 through tightening.

In addition, the adjustment weight 30 inserted into the bolt fastening holes 53 and 55 of the step portion 51 is a computer bolt 30 is formed with a spiral screw formed on the rod-shaped member, the rotation shaft ( At the same time serves to couple and fix the 25 to the first side member 50, for adjusting the position of the pressure control plate 20 (more specifically, the degree of inclination of the pressure control plate 20) for Play a role.

The protrusion 25B of the rotating shaft 25 fixedly coupled to the second side member 60 according to the present invention forms a stepped portion similar to the first side member 50 in the second side member 60. The second side member 60 is fixedly coupled to the bolt fastening hole of the step part by using two tightening bolts or through tightening of a tightening bolt inserted into the tightening cap 90 and the tightening cap 90. It can be configured to be fixed to the coupling.

The pressure control plate 20 according to the present invention is provided inside the body 10 to be perpendicular to the ground or inclined obliquely from the ground (ie, rotated at an angle vertically), and according to the degree of inclination The opening and closing degree of the inlet 11 is changed so that the exhaust pressure can be varied.

The inclination degree should be set differently according to the type of engine and exhaust pipe installed in each vehicle, and the initial inclination of the pressure regulating plate 20, that is, the pressure installed inside the body 10 when the internal combustion engine is in a stopped state. The degree of inclination of the control plate 20 is set through the following process. (Hereinafter, the state of the pressure control plate 20 used in the same meaning as described above will be referred to as the initial tilt.)

The initial inclination setting of the pressure regulating plate 20 is set based on the low speed rotation of the internal combustion engine. This is because the exhaust pipe provided in the normal vehicle is designed on the basis of the exhaust amount at the maximum output by the explosion stroke of the engine, so that the engine efficiency is significantly lowered at the low speed rotation.

Exhaust pressure automatic control device according to the present invention is provided in the exhaust pipe designed according to the exhaust amount during the high speed rotation as described above, during the low speed rotation of the internal combustion engine can create an optimal exhaust pressure environment by the pressure control plate 20 The purpose is to make sure.

Therefore, by detecting the exhaust pressure indicating the optimum combustion efficiency and output increase during low-speed rotation of the internal combustion engine, by utilizing the lift force of the pressure control plate 20 obliquely to the exhaust path of the exhaust gas, the optimum exhaust gas at low-speed rotation Pressure, that is, the degree of inclination of the pressure regulating plate 20 that can create the detected exhaust pressure is found and the initial inclination is set.

Accordingly, when the initial inclination value of the pressure control plate 20 for forming the detected exhaust pressure is calculated, the pressure control plate 20 is provided inside the body 10 while maintaining the inclination corresponding to the value. There is a need for adjustment means.

The adjustment weight 30 according to the present invention is a mechanism for achieving the above object, the computational bolt corresponds to this, specifically, the initial pressure of the pressure control plate 20 by the weight of the computational bolt 30 Ensure that the tilt is maintained.

That is, the rotating shaft 25, the stepped portion 51 and the computer bolt 30 is configured to move together through the fastening by the tightening bolt 70.

Accordingly, if no external force is applied to the threaded bolt 30, the threaded bolt 30 will be directed toward the gravity direction by its own weight.

By using the above properties, first by rotating the

projections

25A, 25B of the rotating shaft 25 extending out of the body 10, the pressure control plate 20 is calculated through the above-described detection process It is set to have an optimal inclination and positioned inside the body (10).

When the above process is completed, after rotating the first side member 50 so that the threaded bolt 30 is directed toward the gravity direction and can be fastened to the bolt fastening holes 53 and 55 of the stepped part 51. By inserting the threaded bolt 30 and the tightening bolt 70 into the bolt fastening holes 53 and 55, respectively, tightening the protrusion 25A, the pressure regulating plate 20 maintains an initial inclination and the body 10. ) Will be located inside.

As described above, the apparatus for automatically adjusting the exhaust pressure according to the present invention synchronizes the kinetic energy of the exhaust gas with the lifting force of the pressure regulating plate 20 to detect the exhaust pressure that can achieve the maximum engine efficiency at low speed rotation of the internal combustion engine. By setting the pressure control plate 20 in the method it is possible to eliminate the incomplete combustion and deterioration of the force generated during low-speed rotation.

In the above, a method of increasing the engine efficiency at low speed rotation by increasing the exhaust pressure of the exhaust pipe by using the pressure control plate 20 according to the present invention has been proposed.

However, when the vehicle runs at high speed, the valve overlap time is greatly reduced, and since the piston reciprocates at a very high speed, high exhaust pressure is rather an obstacle to the piston's lifting force at the end of the valve overlap, resulting in engine efficiency. Will drop.

Therefore, in the case of the high speed running as described above, a means for lowering the exhaust pressure is required. That is, in the present invention, the pressure regulating plate 20 blocking the inlet 11 of the body 10 should be removed from the inlet 11 as much as possible.

The wing 40 according to the present invention is a mechanism for achieving the above object at high speed by using the drag generated during driving to remove the pressure control plate 20 from the inlet 11 as much as possible, The exhaust passage area is secured enough to smoothly exhaust the exhaust pressure.

Looking more specifically as follows.

The wing 40 according to the present invention is configured to operate by using the air resistance increased during high speed driving of the vehicle. Therefore, the configuration is made of a wing or plate shape arranged in a direction perpendicular to the main traveling direction of the vehicle.

In addition, the wing 40 is provided on the outer surface of the body 10, the vertical rotation operation within a certain angle range in accordance with the degree of air resistance generated during the running of the vehicle, the exhaust pressure automatic adjustment device according to the present invention The pressure control plate 20 is also configured to vertically operate in conjunction with the vertical rotational movement of the weight 40, so that the high-speed rotation to automatically secure a sufficient exhaust passage area of the body 10 in response to this. To help.

That is, the automatic exhaust pressure adjusting device according to the present invention, in order to interlock the movement of the vane 40 with the pressure control plate 20, the rotary shaft 25, the stepped portion 51 and the computer bolt 30 is the Through the fastening by the tightening bolt 70 is configured to move the whole together, the vane 40 is configured to be coupled to the lower end of the computer bolt 30, the vertical rotation of the vane 40 in accordance with the air resistance force In proportion to the degree of operation, the pressure control plate 20 was also vertically rotated so that the opening and closing amount of the exhaust passage was changed immediately.

The vane 40 has a shape in which at least two or more plate-shaped members are formed in a layered structure in contact with one side edge of each other, and formed on one surface of the vane 40, as shown in FIG. 2. ) And a pair of tightening nuts 80a and 80b to be fastened to the threaded bolts 30, and at the same time, through the selection of the tightening positions of the threaded bolts 30 and nuts, the upper and lower portions of the vane 40 By enabling the position adjustment was configured to enable the appropriate position of the wing 40 according to the type of vehicle.

3 (a), (b) and (c) is an operation diagram showing a sequence in which the exhaust pressure automatic control device according to the present invention is operated according to the running speed of the vehicle.

Figure 3 (a) shows the arrangement of the pressure control plate 20, the adjustment weight 30 and the wing 40 in accordance with the present invention when the internal combustion engine is stopped.

As shown in Figure 3 (a), the pressure control plate 20 is a predetermined inclination for creating an optimum exhaust pressure corresponding to the low-speed rotation of the internal combustion engine is installed exhaust pressure automatic adjustment device according to the invention It is fixed and provided inside the body 10, the adjustment weight 30 and the wing 40 is configured to be disposed facing the direction of gravity.

Thereafter, when the internal combustion engine operates and rotates at a low speed, as shown in FIG. 3 (b), the pressure of the gas flowing into the inlet 11 of the body 10 and the air resistance generated in the vane 40 are obtained. The pressure control plate 20 is rotated vertically by a certain angle.

At this time, the inclination of the pressure control plate 20 vertically rotated by a predetermined angle is close to the inclination for forming an optimum exhaust pressure at the low speed rotation detected in the above-described process.

Figure 3 (c) shows the arrangement of the pressure control plate 20, the adjustment weight 30 and the wing 40 according to the present invention during the high speed driving of the vehicle, that is, the high speed rotation state of the internal combustion engine.

As shown in FIG. 3 (c), the vane 40 is vertically rotated at a considerably large angle due to the air resistance generated in the vane 40 which is further increased according to the high speed driving of the vehicle. The pressure regulating plate 20, the pressure regulating plate 20 is removed from the inlet 11 of the body 10 to maximize the opening and closing amount of the exhaust passage.

Accordingly, it is possible to automatically lower the exhaust pressure again during high-speed driving (exactly as a result of returning to the exhaust pressure of the original exhaust pipe installed in the vehicle) to create an exhaust pressure environment suitable for the maximum output of the vehicle. .

The installation position of the exhaust pressure automatic control device according to the present invention installed in the vehicle is as follows.

The motor vehicle is generally assembled in order from the exhaust manifold for engine exhaust, in the order of automotive catalyst, intermediate muffler and end muffler.

Exhaust pressure automatic control device according to the invention is installed in the region between the vehicle catalyst device and the intermediate muffler or in the region between the intermediate muffler and the end muffler in the exhaust pipe configuration sequence by automatically adjusting the opening and closing of the exhaust passage by internal combustion engine It creates an optimum exhaust pressure environment according to the output of.

While the preferred embodiments of the present invention have been described above using specific terms, such descriptions are for illustrative purposes only, and it is obvious that various changes and modifications can be made without departing from the spirit and scope of the following claims. It's work. Such modified embodiments should not be understood individually from the spirit and scope of the present invention, but should fall within the claims appended to the present invention.

Claims

As the exhaust pressure automatic control device of the internal combustion engine,

It is inserted and installed in the middle region of the exhaust pipe, one side is formed with an inlet for introducing the exhaust gas discharged from the internal combustion engine, and the other side opposite to the inlet is formed with a discharge port for sending out the exhaust gas to the outside Body;

A thin plate-like member, the pressure control plate is disposed between the inlet and the discharge port inside the body, and configured to be rotatable in a vertical direction with the ground within a predetermined angle range;

A rod-shaped member, coupled to one side of the pressure regulating plate to enable a substantially vertical rotational movement of the pressure regulating plate, the rotating shaft being configured to protrude a predetermined portion through through holes formed on both sides of the body;

A first side member and a second side member which are provided on both outer surfaces of the body and coupled to the protrusions of the rotating shaft which extend outwardly through both sides through the through holes;

An adjustment weight coupled with the first side member to set an initial tilt of the pressure control plate; And

Composed in the shape of a wing so as to receive a sufficient air resistance force, coupled to the lower portion of the adjustment weight by the air resistance generated during the driving of the vehicle vertical rotation operation within a certain angle range, in conjunction with the vertical rotation operation the pressure The throttle plate also automatically adjusts the exhaust pressure of the internal combustion engine, characterized in that it comprises a vane to allow the vertical rotation operation to occur.
The method of claim 1,

The inlet and the outlet may be configured to have a cylindrical shape so that the body can be easily coupled to the exhaust pipe, or correspond to various exhaust pipe sizes, and is configured in a conical shape in which the vertex region is cut so that it can be flexibly inserted and coupled. Automatically adjusting exhaust pressure of internal combustion engine.
The method of claim 1,

The first side member is

The stepped portion for fixing the rotation shaft and the adjustment weight to the first side member is formed protruding in a layered shape,

The stepped portion is formed with a receiving hole and two bolt fastening holes for accommodating the protrusion of the rotating shaft into the stepped portion,

The rotating shaft accommodated in the stepped portion is fixedly coupled to the first side member by tightening a tightening bolt inserted into the bolt fastening hole formed in the stepped portion and the adjusting weight, and the rotating shaft, the stepped portion, and the adjusting weight are all together. Automatically adjusting the exhaust pressure of the internal combustion engine, characterized in that configured to move.
The method according to claim 1 or 3,

The adjustment weight is an exhaust pressure automatic control device for an internal combustion engine, characterized in that the threaded screw is formed on the rod-shaped member.
The method of claim 1,

Protruding portion of the rotating shaft coupled to the second side member is automatically fixed to the second side member through the tightening of the tightening cap and the fastening bolt inserted into the tightening cap fastening apparatus for the internal combustion engine .
The method of claim 4, wherein

The vane is composed of a shape in which at least two or more plate-like members in contact with one side edges of each other to form a layer structure,

Computed bolt through hole is formed on one side of the wing, and the threaded bolt inserted into the through hole is coupled to the wing through the upper and lower tightening by a pair of fastening nuts, and at the same time, the tightening position of the threaded bolt and nut. Automatically adjusting the exhaust pressure of the internal combustion engine, characterized in that the upper and lower positions of the vane can be adjusted by selection.