Turbocharged internal combustion engine

Claim 1

An internal combustion engine comprising an exhaust gas turbocharger having a turbine section provided with a housing having an interior primary passageway and a secondary passageway, and a turbine wheel within said housing and responsive to the exhaust gas flow through said primary passageway, said secondary passageway effecting bypassing of a predetermined amount of exhaust gas away from said turbine wheel when the engine is in a selected operating mode, and a compressor section having a compressor wheel operatively connected to said turbine wheel and mounted within a housing and in communication with an engine air intake manifold; a pressure responsive adjustable fuel feed means in communication with engine combustion chambers; a pressure responsive wastegate means having an adjustable valve for regulating the exhaust gas flow through the secondary passageway, said valve being biased to a closed position with respect to said secondary passageway; and a multiport connection having an interior cavity with a first port in pressure communication with said wastegate means whereby the pressure within such cavity is in opposition to the valve bias, a second port in pressure communication with said air intake manifold, and a third port in pressure communication with said fuel feed means; when pressure within the cavity is below a predetermined amount, the bias on said adjustable valve overcomes said cavity pressure and effects adjustment of said valve to said closed position, the fuel feed means is directly responsive to the cavity pressure and reduces fuel feed to said engine combustion chambers.