Engine brake using a partial inlet flow turbine brake and turbocharger

摘要

Engine brake using a brake valve and partial intake flow turbine turbocharger. The present invention relates to an engine braking system including a butterfly valve located in the exhaust system upstream of a partial intake engine turbocharger. A bypassed exhaust gas passage is used to supply exhaust gas to the turbine when the flap valve is in the closed position. Using a back pressure butterfly valve located upstream of the turbocharger, the valve can be closed completely to generate high levels of back pressure. Using the external bypass exhaust gas supply to the turbine housing, the turbine continues to rotate, engine mass flow is not stifled, and will result in improved brake performance.