| 摘要 |
A casing arranged to be connected to accelerator structure of a vehicle and movably enclosing a foot engaging member projecting through the top of the casing. An air tight collapsible bag in the casing is disposed under the foot engaging member, and such collapsible member is operable by the vacuum in the engine fuel intake system to automatically back off the throttle under certain engine conditions and to apply more throttle under other conditions for smoothening out the function of the vehicle and for other reasons.
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