| 摘要 |
<p>A hydraulic control unit for a vehicle anti-lock brake system is disclosed which comprises a bore defining a chamber symmetrical about an axis and having a sidewall and a bottom wall. A fluid inlet passage is open to the bore from one of the walls and a damping orifice of substantially restricted diameter relative to the inlet passage is in open communication with the inlet passage. An attenuator is seated within the chamber and is sealed relative to the chamber to preclude the flow of brake fluid from the control unit. The attenuator includes a compressibly deformable solid core member that substantially fills the chamber. Also, there is provided a clearance relationship between the attenuator and chamber walls thereby exposing the attenuator on all sides to brake fluid pressure from the inlet passage whereby, as the pressure of the brake fluid within the hydraulic control unit fluctuates, the compressible attenuator core member absorbs the fluid pressure pulses, and thereby allows the damping orifice to attenuate the pressure pulses to the system.</p> |
