Abstract: The invention relates to a device for conditioning the atmosphere when testing engines, comprising an inlet duct connected to an engine intake, an outlet duct connected to the exhaust of the engine, a communication duct that connects the inlet duct to the outlet duct, a bypass valve in the inlet duct, a super-charging turbo assembly in the inlet duct, a heat exchanger in the outlet duct, and a turbocharger after the heat exchanger. The device further comprises a first three-way valve that connects the inlet duct to the outlet duct, an on/off valve in the outlet duct, a second three-way valve in the outlet duct, a control valve in a duct that connects the outlet duct to the atmosphere, and a section of the outlet duct that connects the exchanger to the communication duct.

Abstract: A compressor housing includes a compressor inlet duct and an inlet for a compressor wheel. The compressor inlet duct has a longitudinal axis and connects an air intake duct with the compressor wheel inlet. The compressor housing includes at least one appendix positioned between an upstream portion of the compressor inlet duct and the compressor wheel inlet. The appendix includes a pipe closed in a distal part thereof with respect to the longitudinal axis of the compressor inlet duct.

Abstract: The invention relates to an atmosphere conditioning device for testing engines, comprising an inflow conduit connected to an engine admission, an outflow conduit connected to the exhaust of the engine and expelling exhaust gases, a communication conduit which communicates the inflow conduit with the outflow conduit, a supercharging turbogenerator comprising a turbine in the inflow conduit, a bypass valve which diverts the air flow that circulates towards the turbine, a heat regenerator consisting of heat exchangers in the inflow and outflow conduits, connected by the same heat transfer fluid circuit, a bypass valve in the outflow conduit together with the heat exchanger thereof, a heat exchanger in the outflow conduit downstream from the heat regenerator, and a turbocompressor downstream from the heat exchanger.

Abstract: The invention relates to a device for conditioning the atmosphere when testing engines, comprising an inlet duct connected to an engine intake, an outlet duct connected to the exhaust of the engine, a communication duct that connects the inlet duct to the outlet duct, a bypass valve in the inlet duct, a super-charging turbo assembly in the inlet duct, a heat exchanger in the outlet duct, and a turbocharger after the heat exchanger. The device further comprises a first three-way valve that connects the inlet duct to the outlet duct, an on/off valve in the outlet duct, a second three-way valve in the outlet duct, a control valve in a duct that connects the outlet duct to the atmosphere, and a section of the outlet duct that connects the exchanger to the communication duct.

Abstract: An EGR valve assembly includes an intake gas passage, an exhaust gas passage, an outlet passage, a movable intake gas flap for changing an effective cross section of the intake gas passage and a movable exhaust gas flap for changing an effective cross section of the exhaust gas passage. The intake gas flap includes at least one channel connecting an inlet port on a upstream-side surface of the flap with an outlet port on a downstream-side surface of the flap.

Abstract: A compressor housing includes a compressor inlet duct and an inlet for a compressor wheel. The compressor inlet duct has a longitudinal axis and connects an air intake duct with the compressor wheel inlet. The compressor housing includes at least one appendix positioned between an upstream portion of the compressor inlet duct and the compressor wheel inlet. The appendix includes a pipe closed in a distal part thereof with respect to the longitudinal axis of the compressor inlet duct.

Abstract: The invention relates to an atmosphere conditioning device for testing engines, comprising an inflow conduit connected to an engine admission, an outflow conduit connected to the exhaust of the engine and expelling exhaust gases, a communication conduit which communicates the inflow conduit with the outflow conduit, a supercharging turbogenerator comprising a turbine in the inflow conduit, a bypass valve which diverts the air flow that circulates towards the turbine, a heat regenerator consisting of heat exchangers in the inflow and outflow conduits, connected by the same heat transfer fluid circuit, a bypass valve in the outflow conduit together with the heat exchanger thereof, a heat exchanger in the outflow conduit downstream from the heat regenerator, and a turbocompressor downstream from the heat exchanger.

Abstract: An EGR valve assembly includes an intake gas passage, an exhaust gas passage, an outlet passage, a movable intake gas flap for changing an effective cross section of the intake gas passage and a movable exhaust gas flap for changing an effective cross section of the exhaust gas passage. The intake gas flap includes at least one channel connecting an inlet port on a upstream-side surface of the flap with an outlet port on a downstream-side surface of the flap.