| 摘要 |
Malfunctioning of a combined valve and aspirator assembly 10 is prevented by opening an aspirator valve 11 forming part of the combined valve and aspirator assembly 10 when an engine 6 of a motor vehicle 1 is to be shut-down. Opening the valve 11 when the engine 6 is off allows fluid to drain and prevents risk of the valve sticking in the closed position due to icing up of the valve 11 in cold ambient conditions. In some embodiments the valve 11 is only opened for a predefined period of time following the shutdown of the engine 6 in order to prevent unnecessary power usage if the engine is off for an extended period of time. Opening of the valve may be dependent on the temperature. Additionally, heat may be provided to the valve when a key-on event occurs, i.e. the engine is started. |
