Patent ID: 6945048

Claim:
An exhaust pressure restriction device for an internal combustion engine comprising: a turbocharger having a turbine, the turbine having an exhaust gas inlet connected to an exhaust manifold of the internal combustion engine, a turbine wheel drivingly engaging a compressor of the turbocharger, an exhaust gas outlet; a waste gate valve in communication with the exhaust gas inlet; a restrictor fitting having an exhaust gas inlet, an exhaust gas outlet and a restrictor orifice disposed between the exhaust gas inlet and the exhaust gas outlet, the restrictor fitting being mated to the turbine such that the exhaust inlet of the restrictor fitting is disposed for communication with the exhaust gas outlet of the turbine; and, a bypass fitting having an exhaust gas inlet, an exhaust gas outlet, and a bypass passageway, the bypass fitting being coupled to both the restrictor fitting and the turbocharger such that the exhaust gas inlet of the bypass fitting is disposed for communication with the exhaust gas outlet of the restrictor fitting, and the bypass passageway is disposed for communication with the waste gate valve, and wherein the restrictor fitting and bypass fitting are manufactured as a unitary part which is mounted to the turbine.