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

Abstract

The present invention relates to an apparatus for automatic control of the exhaust pressure of an internal combustion engine. The apparatus includes: a body having an inlet and an outlet for exhaust gas; a pressure control plate, which is a thin plate placed between the inlet and outlet inside the body, designed to rotate along a vertical direction with respect to the ground, within a particular range of angles; a rotational shaft, which is a bar coupled to one side of the pressure control plate that allows it to have a substantial vertical-rotation movement; first and second side elements, attached on both sides of the body's exterior and affixed to the protruding part of the rotational shaft extending outward through the holes on both sides; a controlling pendulum coupled to the first side element for setting the initial gradient of the pressure control plate; and a pendulum blade, coupled to a lower portion of the controlling pendulum, which moves in vertical rotation within a particular range of angles by means of air resistance generated during the operation of a vehicle and which, interlocked with the vertical rotational movement, causes the pressure control plate to move in vertical rotation also.

1 - 6 . (canceled) 
     
     
         7 . An apparatus for automatic control of exhaust pressure of an internal combustion engine, the apparatus comprising:
 a body inserted into a middle region of an exhaust pipe, the body having an inlet formed on one side thereof and an outlet formed on the other side thereof opposite the inlet, the inlet configured to receive exhaust gas emitted from the internal combustion engine, the outlet configured to expel the received exhaust gas to the outside;   a pressure control plate shaped as a thin plate, the pressure control plate placed inside the body between the inlet and the outlet and installed such as to be capable of rotational movement;   a rotational shaft shaped as a bar and coupled to an edge of the pressure control plate to enable the rotational movement, the rotational shaft installed such that a portion thereof protrudes from within the body to without;   a first side element coupled to the portion of the rotational shaft protruding out of the body;   a controlling pendulum included outside the body to set an initial gradient of the pressure control plate; and   a pendulum blade shaped like a wing to receive sufficient air resistance and coupled to a lower portion of the controlling pendulum, the pendulum blade configured to move together with the controlling pendulum by way of air resistance generated during an operation of a vehicle and configured to generate the rotational movement of the pressure control plate in linkage with the vertical rotation movement.   
     
     
         8 . The apparatus for automatic control of exhaust pressure of an internal combustion engine according to  claim 7 , wherein the inlet and the outlet are cylindrical in shape so as to allow easy coupling of the body to an exhaust pipe, or are frustoconical in shape so as to allow coupling to exhaust pipes of various sizes with flexibility. 
     
     
         9 . The apparatus for automatic control of exhaust pressure of an internal combustion engine according to  claim 7 , wherein the first side element further comprises a stepped part for coupling the rotational shaft and the controlling pendulum. 
     
     
         10 . The apparatus for automatic control of exhaust pressure of an internal combustion engine according to  claim 7 , wherein the controlling pendulum is a full-thread bolt having a helical screw formed in a bar-shaped element. 
     
     
         11 . The apparatus for automatic control of exhaust pressure of an internal combustion engine according to  claim 7 , wherein the rotational shaft protrudes outward at both sides of the body, with the first side element coupled to the rotational shaft protruding outward at one side and a second side element coupled to the rotational shaft protruding outward at the other side. 
     
     
         12 . The apparatus for automatic control of exhaust pressure of an internal combustion engine according to  claim 10 , wherein the pendulum blade has at least two plate-shaped elements adjoined on one edge to form a leveled structure,
 and a hole for a full-thread bolt is formed in a surface of the pendulum blade, such that the full-thread bolt inserted in the hole is coupled with the pendulum blade by way of a pair of tightening nuts tightened from above and below, and the vertical position of the pendulum blade is adjustable by selecting the positions of the tightening nuts.   
     
     
         13 . The apparatus for automatic control of exhaust pressure of an internal combustion engine according to  claim 9 , wherein the stepped part has a holding hole and two bolt-fastening holes formed therein, the holding hole for inserting a portion of the rotational shaft inside,
 the portion of the rotational shaft inserted inside the stepped part is coupled to the first side element by way of tightening, in relation to the controlling pendulum, tightening bolts fastened respectively in the two bolt-fastening holes,   and the rotational shaft, the stepped part, and the controlling pendulum are configured to move together as a whole.