Patent ID: 7980061

Claim:
An engine system for a vehicle comprising: an internal combustion engine; an intake fluid system that receives an intake fluid stream; an exhaust fluid system that receives an exhaust stream from the engine; a turbocharger device including a compressor member in operative communication with the intake fluid stream and an energy supply member in operative communication with the exhaust stream to be actuated thereby, the energy supply member transferring energy to the compressor member, the compressor member supplying a compressed fluid stream to the internal combustion engine; a fluid cooler operatively coupled to the intake fluid system downstream of the compressor member to reduce a temperature of the compressed fluid stream; a hydrocarbon injector in operative communication with the exhaust stream to treat the exhaust stream; a controller; and a bypass fluid system including an upstream end, a downstream end, and a bypass valve, the upstream end receiving a portion of the compressed fluid stream from the turbocharger device, the downstream end in fluid communication with the exhaust fluid system downstream from the energy supply member and upstream from the hydrocarbon injector, the bypass fluid system portion of the compressed fluid stream being mixed with the exhaust stream prior to entering the hydrocarbon injector, the controller changing a configuration of the bypass valve to selectively change flow through the bypass fluid system.