Patent ID: 7168682
Filing Date: 2007-01-30
Classification: F02D,F02M

Abstract:
1. Emission gas recycling equipment comprising: a passage for recycling a part of an emission gas from an exhaust side to an intake side of a combustion engine; and a control valve for controlling an amount of the part of the emission gas, which is recycled into the intake side through the passage, wherein the control valve includes: the butterfly valve is rotatable in a range between the valve full open position and a predetermined position, at which the butterfly valve is rotated by a predetermined degree from the valve full close position in the first direction, the valve open/close operation means includes a power unit for rotating the butterfly valve in the first direction and the second direction, the valve open/close operation means includes a first spring and a second spring, the first spring applies a force to the butterfly valve in the first direction from the valve full open position to the valve full close position, and the second spring applies a force to the butterfly valve in the second direction from the predetermined position to the valve full close position.