Patent ID: 6920864

Claim:
A throttle body for an internal combustion engine, with a throttle member having at least a portion that is movable to control at least in part the operation of the engine, the throttle body comprising: a housing having a passage through which all of the air is delivered through the throttle body; a first plate carried by the housing for linear reciprocation between a first position and a second position in response to movement of the throttle member, and having a recess defining an arcuate leading edge; and a second plate carried by the housing for linear reciprocation between a first position and a second position in response to movement of the first plate, and having a recess defining an arcuate leading edge that is opposed to and facing the leading edge of the first plate so that the first plate and the second plate define an opening between them that has a minimum flow area when the first plate and the second plate are in their first positions, a larger flow area when the first plate and the second plate are in their second positions and wherein the flow area defined by the opening is unobstructed.