Patent Number: 6,253,730

Title: Engine compression braking system with integral rocker lever and reset valve

Abstract: An engine compression braking system having an integral rocker lever and reset valve utilizes a single rocker lever to operate an engine in both normal power and braking modes while effectively closing an exhaust valve to define a braking mode exhaust valve opening event prior to a primary opening event. The system includes a reset valve mounted on the rocker arm a spaced distance from an actuator piston to relieve fluid pressure from a high pressure circuit after an initial opening of the exhaust valve. A reset contact element is mounted on a stationary engine component for engagement by the reset valve during movement of the rocker lever to cause opening of the reset valve and relief of the pressure. In one embodiment, a bias chamber and bias chamber supply circuit are provided to permit low pressure braking fluid to be continuously supplied to an actuator supply circuit.

Inventors: Gustafson; Richard J. (Columbus, IN)

Assignee: Cummins Engine Company, Inc.

International Classification: F01L 13/06 (20060101); F02D 13/04 (20060101); F02D 013/04 ()

Expiration Date: 07/03/2018