A hydraulic lash adjuster

摘要

The lash adjuster (10) has a body portion (12) with a bore (14) formed in it with a bottom surface (16). A plunger (18) has a top surface and is slidably received within the bore. The plunger has an internal channel (54) with a bleed hole (56) formed in it connecting the top surface of the plunger to a high pressure chamber (24) formed between the bottom surface of the bore and the bottom of the plunger. The body portion has a valve opening (28) formed in it which is in fluid communication with the engine fluid supply. A check valve mechanism (30) selectively opens and closes the valve opening in response to pressure differences between the engine fluid reservoir and the high pressure chamber.