| 摘要 |
<p>PURPOSE:To prevent a driving wheel from racing, by deciding racing through a control unit on the basis of a signal from a speed sensor detecting a speed of the driving wheel and controlling in accordance with a condition of the racing a supercharge pressure, for actuating a waste gate valve, by a solenoid valve. CONSTITUTION:When a vehicle is driven running, an engine 9 equipping a supercharger 1 always detects a rotary speed of a driving and a driven wheel respectively by a sensor 30, 31. And when a difference between the speeds by each sensor 30, 31 increases to a preset value or more, a racing preventive device, deciding racing and outputting a signal in accordance with an extent of the racing from a subtraction circuit 33 while a duty signal, increasing its duty value larger as the racing increases larger, from a comparator circuit 35, inputs by an inverter circuit 38 a signal of small duty value to a solenoid valve 21. In this way, the solenoid valve 21 closes decreasing a leak amount, and the engine, decreasing its output by opening a waste gate valve 13 because the supercharge pressure in a control chamber 12a of an actuator 12 rises, eliminates the racing.</p> |
