| 摘要 |
<p>A vacuum actuator for controlling the idle position of the throttle lever in a vehicle engine, comprising within a housing a control diaphragm (18) and an actuating diaphragm (20) defining three chambers therein (22, 26, 24) the first two of which are connected to vacuum and the third one to atmosphere, a controlled passage (74) between the second and third chambers, and an output plunger (62) connected to the actuating diaphragm for being positioned thereby in an actuating range as a function of the level of vacuum communicated to the actuator.
<??>The invention provides for means (38, 40) for withdrawing the plunger from its actuating range to a fully retracted position when vacuum is no longer available.
<??>For use in automotive vehicles. </p> |
