Patent ID: 7543555
Filing Date: 2009-06-09
Classification: F01L

Abstract:
1. A hydraulic lash compensation device for an internal combustion engine, the hydraulic lash compensation device comprising: a body defining a bore therein and a fluid port in communication with a source of fluid pressure; a plunger assembly slidingly received within the bore and cooperating with the bore to define a high pressure chamber, the plunger assembly including a lower pressure chamber, an upper plunger element adapted for engagement with an adjacent surface of a valve train component, and a lower plunger element, the bore and the lower plunger element cooperating to define a leakdown clearance providing fluid communication between the high pressure chamber and the low pressure chamber; a plunger spring normally urging the plunger assembly outward of the bore; and a mechanical lift loss feature including a generally annular lift stop member retained to the upper plunger element by an adjustment member that extends unencumbered through the lift stop member and is adjustably secured to the upper plunger element, the lift stop member is biased away from the upper plunger element by a lash spring, wherein when the upper plunger element is received into the body, the upper plunger element is offset a predetermined distance from the lower plunger element by virtue of the lift stop member's engagement with the lower plunger element, and wherein the offset is adjustable based on the position of the lift stop member relative to the upper plunger element.