Patent ID: 8831861

Claim:
A method for engine braking of a multi-cylinder internal combustion engine of a vehicle, the engine having at least one exhaust-gas turbocharger with an exhaust-gas turbine and a charge air compressor, and an exhaust manifold conducting exhaust-gas flow from outlet valves of the engine to the at least one exhaust-gas turbocharger, and wherein a throttle device is disposed between the outlet valves of the engine and the exhaust-gas turbocharger and is configured to throttle the exhaust-gas flow and to generate a pressure increase in the exhaust gas for engine braking upstream of the throttle device, the method which comprises: measuring an exhaust-gas counter-pressure and a charge air pressure; determining, based on the measurement of the exhaust-gas counter-pressure and of the charge air pressure, a position of the throttle device to obtain a predetermined braking action; and controlling the exhaust-gas counter-pressure and the charge air pressure by adjusting the throttle device corresponding to the previously determined position of the throttle device.