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KR-102962472-B1 - Temperature Responsive Type Variable Valve and Muffler Thereby

KR102962472B1KR 102962472 B1KR102962472 B1KR 102962472B1KR-102962472-B1

Abstract

The temperature-responsive variable valve (1) applied to the muffler (120) of the present invention is configured with a valve cover (50) that opens the baffle hole (142) of the variable valve baffle (140-1) to allow the exhaust gas to pass through by rotating a valve arm (30) that generates a moving stroke by the pressure applied by the expansion of the low-temperature expansion agent (25A) and the high-temperature expansion agent (25B) of the expansion actuator (20) in the valve body space (10-1) of the valve body (10) due to the temperature difference of the exhaust gas, and is welded and fixed to the variable valve baffle (140-1) among the baffles (140) that divide the internal space where the exhaust gas enters into a plurality of baffle partition spaces, thereby allowing the effect of improving NVH and increasing output tailored to the high/low engine RPM range to be optimized by controlling the variable valve opening amount of the low-temperature/high-temperature expansion actuators (20-1, 20-2) to which expansion agents are respectively applied. The existing features are implemented.

Inventors

  • 원태호
  • 양영덕

Assignees

  • 현대자동차주식회사
  • 기아 주식회사

Dates

Publication Date
20260508
Application Date
20200717

Claims (20)

  1. Valve body; An expansion actuator that is accommodated in the valve body space of the above valve body and expands at the temperature of the above valve body space; A valve arm that moves within the valve body space by receiving a pressurizing force from the expansion of the expansion actuator; and A valve cover is included that rotates with the movement stroke of the valve arm on the outside of the valve body, and The above expansion actuator generates the above pressure using a low-temperature expansion agent and a high-temperature expansion agent having different expansion temperatures; The above expansion actuator is composed of a low-temperature expansion actuator that generates the pressure using the low-temperature expansion agent and a high-temperature expansion actuator that generates the pressure using the high-temperature expansion agent. A variable valve characterized in that the above-mentioned low-temperature expansion actuator and the above-mentioned high-temperature expansion actuator are arranged adjacently in the valve body space.
  2. delete
  3. A variable valve according to claim 1, characterized in that the low-temperature expansion agent and the high-temperature expansion agent are made of wax.
  4. delete
  5. A variable valve according to claim 1, wherein the low-temperature expansion actuator comprises a low-temperature expansion pipe through which the low-temperature expansion agent exits and a low-temperature storage container filled with the low-temperature expansion agent, and the high-temperature expansion actuator comprises a high-temperature expansion pipe through which the high-temperature expansion agent exits and a high-temperature storage container filled with the high-temperature expansion agent.
  6. delete
  7. A variable valve according to claim 5, characterized in that the low-temperature expansion tube and the high-temperature expansion tube have the same diameter, and the low-temperature storage container and the high-temperature storage container have different capacities.
  8. A variable valve according to claim 7, characterized in that the capacity of the high-temperature storage container is greater than the capacity of the low-temperature storage container.
  9. A variable valve according to claim 1, wherein the valve arm comprises an arm body positioned in the valve body space and in contact with the expansion actuator, a movable arm extending from the arm body and extending outside the valve body, and a latch coupled to the valve cover at the end of the movable arm.
  10. A variable valve according to claim 9, wherein the valve arm is provided with a spring in the movable arm, and the spring applies a spring restoring force to the arm body when the pressure is released.
  11. A variable valve according to claim 10, wherein the spring is a compression coil spring.
  12. A variable valve according to claim 1, wherein the valve cover comprises a rotating body having a predetermined size, a hinge axis acting as a rotational center of the rotating body, and a connecting pin connected to the valve arm to apply rotational force to the rotating body with the movement stroke.
  13. A variable valve according to claim 12, wherein the rotating body comprises a rotating arm protruding from a circular shielding plate, and the rotating arm comprises the hinge shaft and the connecting pin.
  14. A variable valve according to claim 13, characterized in that the hinge axis is positioned on the rotating arm above the connecting pin at a distance from the connecting pin.
  15. A variable valve according to claim 14, wherein the connecting pin protrudes from the rotating arm.
  16. In a muffler to which a variable valve according to any one of claims 1, 3, 5 and 7 to 15 is applied, A baffle that divides the internal space where exhaust gas enters into multiple baffle compartments across the space; The above variable valve is, A valve cover comprising a valve body space of a valve body coupled to a variable valve baffle constituting the above baffle, wherein the low-temperature expansion agent and the high-temperature expansion agent of an expansion actuator receive a pressurizing force due to expansion occurring differently due to the temperature difference of the exhaust gas, and the valve cover opens the baffle hole of the variable valve baffle to allow the exhaust gas to pass through by rotation of a valve arm that generates a moving stroke due to the pressurizing force. A silencer characterized by the following.
  17. A silencer according to claim 16, wherein the variable valve is fixedly coupled to the variable valve baffle by welding the valve body.
  18. A silencer according to claim 16, characterized in that the expansion actuator comprises a low-temperature expansion actuator that generates the pressurizing force using the low-temperature expansion agent and a high-temperature expansion actuator that generates the pressurizing force using the high-temperature expansion agent.
  19. A silencer according to claim 16, wherein the variable valve baffle forms a hinge shaft hole, and the hinge shaft hole is coupled to a hinge shaft that acts as a rotation center of the valve cover.
  20. A silencer according to claim 16, wherein the variable valve baffle forms a pin guide groove, and the pin guide groove is coupled to a connecting pin that rotates the valve cover.

Description

Temperature Responsive Type Variable Valve and Muffler Thereby The present invention relates to a variable valve, and more specifically to a muffler equipped with a temperature-responsive variable valve that can optimize the effects of improving NVH (Noise, Vibration, Harshness) and increasing output according to engine RPM (Revolution Per Minute) by controlling the variable valve opening amount based on the temperature fluctuation of exhaust gas to the spring elastic force. Generally, the muffler must function to reduce low-frequency booming noise in the low-speed range (2500 rpm or less), while enabling increased engine output in the high-speed range (2500 rpm or more). A variable valve type muffler is available for this purpose. In a variable valve type muffler, a variable valve is installed at the outlet of one of the multiple pipes serving as the exhaust gas passages inside the muffler, and the system increases engine output by opening the variable valve due to increased exhaust gas pressure in the high-speed range (2,500 rpm or higher). A compression spring type variable valve is used for this purpose. The above compression spring type variable valve comprises a valve body mounted on a baffle that divides the internal space of the muffler into multiple sections, a compression spring located inside the valve body, a valve arm extending outside the valve body, and a valve cover connected to the valve arm. From this, the above-mentioned compression spring type variable valve changes the amount of exhaust gas entering through the valve body hole drilled in the valve body, changes the degree of extension of the valve arm through the elastic deformation of the compression spring, and opens the hole drilled in the baffle by the valve cover through the amount of movement of the valve arm, thereby blocking the exhaust gas passage in the low RPM range to enhance NVH performance, while allowing the exhaust gas to escape smoothly in the high RPM range to enhance output performance. FIG. 1 is a configuration diagram of a temperature-responsive variable valve according to the present invention, FIG. 2 is an example in which an expansion actuator according to the present invention is configured as a dual expansion actuator, FIG. 3 is an example of an assembly for an expansion actuator, a valve arm, and a spring constituting a variable valve according to the present invention, FIG. 4 is a detailed configuration diagram of a valve cover constituting a variable valve according to the present invention, FIG. 5 is an example of an exhaust system to which a muffler equipped with a temperature-responsive variable valve according to the present invention is applied, FIG. 6 is an example in which a temperature-responsive variable valve according to the present invention is configured using a baffle of a muffler, FIG. 7 is an example in which a temperature-responsive variable valve according to the present invention is operated at the temperature of exhaust gas introduced into the muffler in a low RPM range, and FIG. 8 is an example in which a temperature-responsive variable valve according to the present invention is operated at the temperature of exhaust gas introduced into the muffler in a high RPM range. Embodiments of the present invention will be described in detail below with reference to the attached illustrative drawings. Since these embodiments are merely examples and can be implemented in various different forms by those skilled in the art to which the present invention pertains, the embodiments described herein are not limited to the examples described herein. Referring to FIG. 1, the variable valve (1) includes a valve body (10), an expansion actuator (20), a valve arm (30), a spring (40), and a valve cover (50). In particular, the variable valve (1) is characterized as a temperature-responsive variable valve by being composed of a dual expansion actuator (20) that responds to relatively low temperature exhaust gas generated in the low RPM range of the engine and responds to relatively high temperature exhaust gas generated in the high RPM range. For example, the valve body (10) is formed with a valve body space (10-1) that is open on one side and forms an internal space in which an expansion actuator (20) and a spring (40) are accommodated, and a valve arm (30) is supported by the expansion actuator (20) with one side of the valve body space (10-1) accommodated. In particular, the valve body space (10-1) is formed in a tapered shape, so that the overall shape of the valve body (10) is also formed in a tapered shape. For example, the expansion actuator (20) contacts one part of the valve arm (30) at one position in the valve body space (10-1) of the valve body (10), and forms a movement stroke of the variable valve (1) by pushing the valve arm (30) through a temperature change in the valve body space (10-1). In particular, the expansion actuator (20) is composed of a low-temperature expansion actuator (20-1) and