| 摘要 |
<p>A throttling apparatus for an automotive vehicle is disclosed which has two independently-rotated throttle valves (2, 4). A first throttle valve (2) is rotatably supported in an air intake passageway (1) of the vehicle and has a cylindrical through hole (3) formed therein. The first throttle valve (2) can be continuously rotated between an open position, in which the through hole is unobstructed and air can flow through the first throttle valve, and a closed position, in which the through hole (3) is obstructed by the walls of the air intake passageway and air can not flow through the air intake passageway. The second throttle valve (4) is a butterfly valve which is rotatably disposed in the through hole (3) in the first throttle. A controller (20) and actuators (10,11) rotate the two throttle valves independently with respect to one another. A controller (2) computes the optimal relative rotational angle (X) of the two throttle valves (2, 4) based on the operating state of the engine, the running condition of the vehicle, and the amount by which the accelerator pedal is depressed. The controller (20) controls the actuators (10, 11) so as to rotate the throttle valves (2, 4) until the actual relative rotational angle equals the optimal relative rotational angle.</p> |
