| 摘要 |
A carburetor choke vacuum break unit has a check valve which restricts flow out of the unit to provide a period of delay between the application of manifold vacuum to the unit and the opening of the choke by the unit. To prevent plugging of the check valve, a purge hole is provided between the check valve and the source of vacuum; this permits a continuous flow of air into the vacuum conduit to prevent pulsations in manifold vacuum from transmitting foreign matter to the unit where it could tend to plug the check valve. |
