| 摘要 |
An automotive shock absorber has a piston-like member (21) mounted for vertical sliding movement within a cylindrical enclosure (26). The member separates an "active" chamber (23) from a "reactive" chamber (24). The member is connected to a vehicle body, while the enclosure is connected to a control arm in the vehicle's suspension system. The member has a head and body which define an internal cavity. A main passageway through the head communicates the "active" and "reactive" chambers. A valve element (30) is mounted in the cavity, and is biased to move toward a seat (54) on the head to normally close the main passageway. However, even when the element engages the seat to close the main passageways, the "active" and "reactive" chambers continue to communicate with one another via a pilot passageway (72 or 73) which includes fixed and variable orifices (102, 110) which are in series with one another. |
