Patent ID: 7240491

Claim:
A method for providing stress-limited engine braking control to a turbocompound type internal combustion engine, comprising: providing an exhaust system in association with a turbocompound type internal combustion engine that ducts an exhaust gas flow from the engine and which further comprises a supercharger turbine that drives a compressor for engine combustion air to the engine; configuring an exhaust turbine located in the exhaust system downstream of the supercharger turbine to extract residual energy from the exhaust gas flow utilizing a transmission coupled to a crank shaft of the combustion engine and further including an exhaust braking throttle downstream of the exhaust turbine; and variably controlling the configuration of the exhaust braking throttle utilizing a pressure-controlled exhaust pressure regulator that causes variable configuration of the exhaust braking throttle in dependence upon the currently occurring engine speed.