Systems and methods for hydraulic lash adjustment in an internal combustion engine

Patent metadata

Field	Value
Publication number	US-9200541-B2
Application number	US-201313946860-A
Country	US
Kind code	B2
Filing date	Jul 19, 2013
Priority date	Jul 20, 2012
Publication date	Dec 1, 2015
Grant date	Dec 1, 2015

Abstract

Systems and methods for actuating engine valves for positive power and engine braking operation are disclosed. The systems may include a self-lashing hydraulic piston slidably disposed in a fixed or rocker arm housing. The hydraulic piston may have an internal cavity in which a motion absorbing piston is disposed. A hydraulic fluid source may communicate with the hydraulic piston bore. A check valve which may be incorporated in a control valve may controls hydraulic fluid supply from the hydraulic fluid source to the hydraulic piston to provide self-lashing operation of the valve actuation system.

First claim

What is claimed is:

1. A system for hydraulic lash adjustment and engine valve actuation comprising:
a housing disposed above an engine valve train element, said housing having a piston bore and a hydraulic fluid supply passage communicating with the piston bore;
a hydraulic piston slidably disposed in the piston bore, said hydraulic piston having an internal cavity;
a motion absorbing piston slidably disposed in the hydraulic piston internal cavity;
a hydraulic fluid source…

Assignees

• Jacobs Vehicle Systems Inc

Inventors

• Roberts Gabriel Scott
• Baltrucki Justin Damien
• Audibert Kevin

Classifications

• F01L2800/10

  Mechanical Engineering · mapped topic

• F01L9/023

  Mechanical Engineering · mapped topic

• F01L1/18 Primary

  Mechanical Engineering · mapped topic

• F01L13/06

  Mechanical Engineering · mapped topic

• F01L9/12

  Mechanical Engineering · mapped topic