| 摘要 |
<p>A hydraulic lash adjuster (11) disposed within a bore (14) defined by an internal combustion engine (16), the hydraulic lash adjuster (11) comprising a ball plunger (12) including a body portion (13), whereby the body portion (13) is reciprocable in the bore (14) as said ball plunger (12) reciprocates between a relatively retracted position and a relatively extended position. The hydraulic lash adjuster (11) further comprising a leakdown plunger assembly (17) disposed within the body portion (13) and disposed downward in response to downward movement of the ball plunger (12) and said body portion (13). The leakdown plunger assembly (17) has a bottom portion (34) disposed toward a bottom (20) of the bore (14), to define a high pressure chamber (28). In the lash adjuster (11) of the invention, the ball plunger (12) and the body portion (13) comprise a single, integral, formed member. The body portion (13) defines an axial length (L) equal to a major portion of the entire axial length of the bore (14), and further defines an outside diameter (D) wherein the axial length (L) is from about 1.0 to about 1.4 times the outside diameter (D).</p> |
