INTERSTAGE GAS INJECTION FOR MULTI-STAGE TURBOCHARGED NATURAL GAS ENGINE

摘要

A turbocharged internal combustion engine system includes at least one high pressure turbocharger and at least one low pressure turbocharger arranged in series. A fuel source that provides fuel for gaseous fuel induction operation of the engine is connected to inject fuel between the low pressure compressor of the low pressure turbocharger and the high pressure compressor of the high pressure turbocharger.

主权项

1. An internal combustion engine system, comprising:
an internal combustion engine including at least one intake system for delivering a charge flow to at least a portion of a plurality of cylinders of the internal combustion engine and at least one exhaust system for receiving exhaust gas from at least a portion of the plurality of cylinders; at least one high-pressure turbocharger with a first high pressure turbine in the exhaust system and at least one low pressure turbocharger with a first low pressure turbine in the exhaust system downstream of the first high pressure turbine; the low pressure turbocharger further including a first low pressure compressor operably connected to the low pressure turbine with the low pressure compressor in the intake system to receive and compress intake air, and the high pressure turbocharger further including a first high pressure compressor operably connected with the first high pressure turbine with the first high pressure compressor in the intake system downstream of the low pressure compressor; a fuel injector connected to the intake system between the low pressure compressor and the high pressure compressor to provide a fuel to the compressed intake air and form the charge flow for compression by the high pressure compressor; and a wastegate connected to the exhaust system around the high pressure turbine.