Dashpot: Description and Operation

Dashpot:

Purpose
The dashpot prevents the throttle from suddenly closing completely and causing an over-rich condition when the accelerator is released.

Location
located on the throttle body,

Construction
It consists of a diaphragm chamber with a small orifice open to the atmosphere and a light spring.

Operation
When the throttle is open, spring pressure extends the dashpot. When the throttle closes, it first comes to rest on the dashpot, which lets the throttle close slowly, as air is forced out of the chamber through the orifice.