ENGINE BRAKE USING BRAKE VALVE AND PARTIAL ADMISSION FLOW TURBINE TURBOCHARGER

摘要

An engine braking system includes a butterfly valve located in the exhaust system upstream of a partial admission engine turbocharger. A bypass exhaust gas passage is used to supply exhaust gas to the turbine when the flap valve is in the closed position. By using a backpressure butterfly valve located upstream of the turbocharger, the valve can be closed completely to generate high levels of backpressure. By using the external bypass exhaust gas supply to the turbine housing, the turbine continues to spin, the engine mass flow is not choked off, and improved brake performance will result.