| 摘要 |
A short-stroke solenoid-actuated valve assembly (10) modified to minimize mechanical clatter. The valve has a valve seat (20) formed of compressed powdered metal to reduce the intensity and sharpness of sound resulting from closing contact with the valve head. The solenoid pole pieces (38,40) are formed of powdered metal to reduce weight, reduce noise, and improve response of the actuator. The solenoid armature (44) is de-coupled from the valve pintle shaft (28) to decrease impact loading upon opening and closing of the valve. When the valve is employed in a vehicle powered by an internal combustion engine, the solenoid may be actuated at a multiple of the engine's frequency of revolutions, the timing of actuation being selected to occur during a portion of the engine's cycle when the engine is otherwise emitting a high volume of noise. Thus, the actuation sounds of the solenoid and valve may be masked. <IMAGE> |
