KR200220804Y1 - exhaust brake system for a vehicle - Google Patents

Abstract

The present invention relates to an exhaust brake device of a vehicle, and to prevent the loss of power inevitably generated from the engine during operation of the exhaust brake, and to reuse the excess power of the lost engine to enable efficient use of power Its purpose is to.

The present invention for achieving the above object is a cylinder 22 having an air tank (26) in which compressed air is stored, and a piston (24) which is supplied with compressed air from the air tank (26) and moved. The magnetic valve 28 which permits the communication of compressed air only between the cylinder 22 and the air tank 26 at the time of connection of the exhaust brake switch 36, and the exhaust pipe according to the movement of the piston 24 14. An exhaust brake apparatus for a motor vehicle comprising a connecting rod 18 for applying a rotational force to a butterfly valve 16 rotatably mounted on a valve 14, wherein the exhaust pipe 14 is adapted to the flow of exhaust gas. A rotor 40 provided with a plurality of vanes 40a to be rotated by a crank mechanism 44, which is integrally mounted on the rotor 40 via an auxiliary rotating shaft 42 to be rotated, and the crank mechanism 44 Piston 48 that reciprocates according to the rotation of the And a supplementary air tank 60 configured to receive and store the compressed high-pressure compressed air compressed by the compressor 50 through the pressure regulating valve 54 and the check valve 58. It features.

Description

Exhaust brake system for automobiles

The present invention relates to an exhaust brake device of a vehicle, and in particular, by using the surplus power generated during the operation of the exhaust brake to replenish the air pressure used in the pneumatic brake system can be expected to use the power generated from the engine efficiently The present invention relates to an exhaust brake device for an automobile.

In general, in commercial vehicles such as trucks, braking performance due to excessive wear of the lining or fade due to frequent use of the main brakes during downhill driving, deceleration during high-speed driving, and frequent use of the main brakes while driving after excessive loads. In order to prevent the fall of the main brake, an auxiliary brake is provided as an auxiliary brake to assist the main brake.

The conventional exhaust brake device mounted for this purpose has a butterfly valve 16 rotatably on the exhaust pipe 14 between the engine exhaust manifold 10 and the silencer 12, as shown in FIG. The piston rod 20 is connected to the rotary shaft 17 of the butterfly valve 16 via a connecting rod 18, the piston rod 20 is a piston 24 accommodated in the cylinder 22. On the other hand, the one end of the cylinder 22 is provided with an air supply pipe 30 connected through the air tank 26 and the magnetic valve 28.

The solenoid 32 of the magnetic valve 28 is electrically connected to the battery 34, which is a power source of the vehicle, and the exhaust brake switch 36.

Accordingly, when the driver operates the exhaust brake as necessary while driving, the exhaust brake switch 36 is first operated. When the exhaust brake switch 36 is turned on, the power of the battery 34 is solenoid. Is applied to the (32) and the magnetic valve 28 is operated, the compressed air in the air tank 26 is introduced into the cylinder 22 through the air supply pipe 30 in accordance with the operation of the magnetic valve (28). Compressed air introduced into the cylinder 22 pushes the piston 24 and the piston rod 20 so that the connecting rod 18 connected to the piston rod 20 rotates.

In addition, the butterfly valve 16 rotates about the rotary shaft 17 by the rotation of the connecting rod 18 to block the internal space of the exhaust pipe 14, and as a result, the exhaust valve 14 is removed from the exhaust manifold 10. The flow of the exhaust gas discharged to the muffler 12 through the exhaust pipe 14 is blocked.

In this way, when the flow of the exhaust gas in the exhaust pipe 14 is blocked, the output of the engine is lowered and the same effect as that of braking can be obtained.

However, in the conventional exhaust brake device as described above, in order to obtain a more powerful braking effect, the clearance between the exhaust pipe 14 and the butterfly valve 16 may be reduced to minimize the passage amount of the exhaust gas. Since the resistance due to the back pressure acts on the butterfly valve 16, the rigid reinforcement for the butterfly valve 16 is required, but there is a limit to the rigid reinforcement of the member.

Therefore, there is a limit to the frequent use of the exhaust brake in consideration of the rigidity of the butterfly valve (16).

In addition, when the exhaust brake device is used, the output loss of the engine is inevitably inevitable, and thus, the utilization of the surplus power of the engine that is lost is emerging.

Therefore, the present invention has been devised in view of the above-mentioned point, and prevents the power generated from the engine inevitably being lost during operation of the exhaust brake, so that the surplus power of the lost engine can be recycled, thereby making efficient use of power. It is an object of the present invention to provide an exhaust brake device for a vehicle that is enabled.

The present invention for achieving the above object, a cylinder having a compressed air and a piston and a piston rod which is moved by receiving compressed air from the compressed air tank, compressed between the cylinder and the air tank A magnetic valve installed to allow air traffic only when the exhaust brake switch is connected, and a connecting rod provided to provide rotational force to a butterfly valve rotatably installed on the exhaust pipe according to the movement of the piston in the cylinder. An exhaust brake apparatus for an automobile, comprising: a rotor provided with a plurality of vanes in the exhaust pipe so as to be rotated by a flow of exhaust gas; and a crank mechanism which is integrally mounted to the rotor and rotated through an auxiliary rotating shaft, the crank A compressor having a piston for reciprocating according to the rotation of the mechanism, The compressor is characterized in that it is configured by adding a high pressure compressed air compressed by the compressor through the pressure control valve and the check valve and the auxiliary air tank to be stored.

1 is a schematic configuration diagram of an exhaust brake apparatus according to the prior art,

2 is a schematic configuration diagram of an exhaust brake apparatus according to the present invention.

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

14-Exhaust Pipe 16-Butterfly Valve

22-cylinder 26-air tank

28-Magnetic Valve 36-Exhaust Brake Switch

40-rotor 44-crank mechanism

50-Compressor 54-Pressure Control Valve

58-Check Valve 60-Auxiliary Air Tank

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

FIG. 2 is a schematic configuration diagram of an exhaust brake apparatus according to the present invention, and the same reference numerals are denoted in the same reference region as in FIG. 1, which shows a conventional exhaust brake apparatus, and detailed description thereof will be omitted.

The present invention, as shown in the figure, the rotor 40 is rotated via the rotary shaft 41 on the exhaust pipe 14 to enable communication between the exhaust manifold 10 and the silencer 12 of the engine. It is possible to install, and the butterfly valve 16 is installed at a small distance from the vane 40a of the rotor 40, the auxiliary rotary shaft 42 is extended in connection with the rotary shaft 41 of the rotor 40 long The crank mechanism 44 is provided on the crank mechanism 44, and the piston rod 46 connected to the piston 48 is connected to the crank mechanism 44.

The piston 48 is embedded in the compressor 50, and the compressor 50 communicates with the pressure control valve 54 and the check valve 58 via the air supply line 52. The valve 58 is provided with a wheel side air tank 64 in which the auxiliary air tank 60 stores compressed air used in the braking system via the air supply line 62.

Here, the pressure control valve 54 accommodates the plunger 56 that is supported by the spring 55 through the medium, and one side is provided with an exhaust port 54a in communication with the outside air, The compressor 50 is provided with an intake port 51 for inflow of outside air.

In addition, the exhaust pipe 14 is formed with a receiving portion 15 of a curved shape so as to match the outer shape of the vane 40a of the rotor 40, and the vane 40a when the rotor 40 is rotated. Interference between the is prevented.

On the other hand, the butterfly valve 16 is provided in the same configuration as the conventional piston 24 of the cylinder 22 via the connecting rod 18 and the piston rod 20 to be interlockable, this cylinder 22 The air tank 26 is installed to be selectively communicated through the magnetic valve 28, and the solenoid 32 of the magnetic valve 28 is connected to the battery 34 via the exhaust brake switch 36. It is.

Accordingly, when the exhaust brake is operated by the connection of the exhaust brake switch 36, the compressed air in the air tank 26 pushes the piston 24 in the cylinder 22 by the operation of the magnetic valve 28. The piston rod 20 and the connecting rod 18 connected thereto are rotated by the pressure of the piston 24, and the butterfly valve 16 rotates the rotary shaft 17 by the rotation of the connecting rod 18. It rotates to the center to block the internal space of the exhaust pipe (14).

As a result, the exhaust gas discharged from the engine rotates the vane 40a of the rotor 40 in the exhaust pipe 14, and the auxiliary rotation shaft 42 rotates by the rotation of the rotor 40, and the crank The mechanism 44 is rotated, and the piston 48 in the compressor 50 reciprocates at a high speed by the rotation of the crank mechanism 44, and the air introduced therein through the intake port 51 Compressed to be sent to the air supply pipe (52).

At this time, the opening and closing operation of the intake port 51 of the compressor 50 is configured to be opened and closed in accordance with the stroke of the piston 48, as described above, the technique related to opening and closing of the intake port 51 is known The detailed configuration is omitted since it is a matter.

On the other hand, the high-pressure compressed air that is compressed from the compressor (50) and flows through the air supply pipe (52) is supplied into the auxiliary air tank (60) through the check valve (58), and the auxiliary air tank (60). The high-pressure compressed air supplied in the) can supply the compressed air stored in the wheel side air tank 64 through the air supply line 62 during the operation of the braking system.

At this time, the pressure control valve 54 mounted on the air supply line 52 does not prevent excessively compressed high-pressure compressed air from being supplied to the auxiliary air tank 60, or in the auxiliary air tank 60. It serves as a safety device to protect the auxiliary air tank 60 when the compressed air is filled, that is, if the pressure of the compressed air flowing into the air supply line 52 is excessively increased. The plunger 56 rises above the elasticity of the spring 55, so that the air supply line 52 and the exhaust port 54a of the pressure regulating valve 54 are directly communicated to discharge the compressed air. Will be done.

Therefore, the power generated from the engine at the time of operation of the exhaust brake can be used to generate compressed air without being lost as it is, so that the surplus power of the engine can be effectively utilized.

In addition, since the resistance force due to the back pressure of the engine applied to the butterfly valve 16 during the operation of the exhaust brake can be distributed to the rotor 40, even when the frequent operation of the exhaust brake acts on the butterfly valve 16 Since the resistance can be reduced, the use of the exhaust brake is less restricted.

As described above, according to the present invention, the exhaust brake apparatus of an automobile can be utilized to form high-pressure compressed air used in a braking system by using surplus power of an engine that is not utilized during exhaust brake operation. There is an advantage that enables the effective use of the power generated from the.

Claims (2)

An air tank 26 in which compressed air is stored, a cylinder 22 having a piston 24 and a piston rod 20 which are moved by receiving compressed air from the air tank 26, the cylinder 22 and the air The magnetic valve 28 provided to allow the communication of compressed air between the tanks 26 only when the exhaust brake switch 36 is connected, and the exhaust pipe 14 in accordance with the movement of the piston 24 in the cylinder 22. In the vehicle exhaust brake device comprising a connecting rod (18) installed to impart rotational force to a butterfly valve (16) rotatably installed on the In the exhaust pipe 14, the rotor 40 is installed with a plurality of vanes 40a so as to be rotated by the flow of exhaust gas, and the rotor 40 is integrally mounted and rotated through the auxiliary rotating shaft 42. Compressor 50 having a crank mechanism 44, a piston 48 reciprocating in accordance with the rotation of the crank mechanism 44, and a high pressure compressed air compressed by the compressor 50. And an auxiliary air tank (60) adapted to be supplied and stored via the check valve (54) and the check valve (58). According to claim 1, wherein the pressure regulating valve 54 has an exhaust port (54a) in communication with the outside portion on one side while having a plunger (56) that is supported by the spring 55 in the tank An exhaust brake device for an automobile.