Patent ID: 6148793
Filing Date: 2000-11-21
Classification: F01L,F02B,F02D

Abstract:
A brake control for an engine having intake and exhaust manifolds and operable in a braking mode during which an engine exhaust valve is opened to allow compressed gases in an associated combustion chamber to escape during a compression stroke and thereby brake a load driven by the engine, comprising:means for controlling at least one of intake and exhaust manifold pressures, the controlling means including a pressure controller operated by an electronic control module to controllably vary at least one of the intake and the exhaust manifold pressures;an exhaust valve actuator for opening the exhaust valve; andmeans operable while the engine is in the braking mode and responsive to a command representing a desired load condition for operating the controlling means and the exhaust valve actuator such that the exhaust valve is opened at a selectable timing and for a selectable duration.