20110126532 | APPARATUS FOR AUTOMATIC CONTROL OF EXHAUST PRESSURE OF AN INTERNAL COMBUSTION ENGINE - 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. | 06-02-2011 |