Abstract: An internal combustion engine includes a block having a plurality of cylinders. An intake manifold is fluidly connected to the block for supplying charge air to the cylinders. An exhaust manifold is fluidly connected to the plurality of cylinders for conducting exhaust gas away from the cylinders. A turbocharger including a turbine having an exhaust gas inlet is fluidly connected with the exhaust manifold. The turbocharger also includes a compressor having a compressor air inlet and air outlet. The compressor air outlet is fluidly connected to the intake manifold to pressurize the charge air during high power levels of engine operation. An EGR bypass is fluidly connected between the turbine exhaust gas inlet and the intake manifold to recirculate a portion of the exhaust gases to the cylinders. An intake air bypass is fluidly connected between the compressor air outlet and the compressor air inlet.

Abstract: An internal combustion engine includes an intake manifold supplying charge air to the cylinders. An exhaust manifold conducts exhaust gas away from the cylinders. A turbocharger including a turbine has an exhaust gas inlet connected with the exhaust manifold and also includes a compressor having an air inlet and outlet. The compressor air outlet is connected to the intake manifold to pressurize charge air during high power levels of engine operation. An EGR bypass connected between the turbine exhaust gas inlet and the intake manifold recirculates a portion of the exhaust gases to the cylinders. An intake air bypass adapted to recirculate a portion of compressor outlet air back to the compressor air inlet to reduce compressor outlet pressure and aid EGR flow through the EGR bypass to the cylinders during high power operation of the engine is connected between the compressor air outlet and the compressor air inlet.

Abstract: An angle duct for connecting, through a curved elbow section, a turbocharged engine charge cooler with oblong ends with a turbocompressor outlet or a manifold inlet having compact cross sections. The duct has tapered diffusing or expanding end sections enlarged in cross section and increasingly oblong toward the cooler joined by the flattened elbow section having constant or similarly increasing cross section. The combination in an engine induction system combines efficient flow diffusion and/or expansion together with low loss flow through the elbow and good distribution of fluid flow over the charge cooler inlet area.