ENGINE SYSTEM FOR LOW TEMPERATURE COMBUSTION IN DIESEL ENGINE

摘要

The low-temperature combustion engine system includes an engine, a turbine rotating using exhaust gas discharged from the engine, and a turbocharger having a compressor that compresses air supplied to the engine according to the operation of the turbine, and exhaust gas at the front end of the turbocharger. And a high pressure EGR device for recirculating a part of the turbocharger to the engine, and a low pressure EGR device for recirculating a part of the exhaust gas discharged through the turbine of the turbocharger to the engine. The trim value of the turbine (area ratio of the inducer and the exducer of the turbine wheel) is matched to satisfy an operating condition capable of low-temperature combustion with an EGR rate of 50% or more in the heavy-duty driving region of the engine.