EXHAUST GAS RECIRCULATION SYSTEM

摘要

An exhaust gas recirculation (EGR) system includes a turbocharger having compressor and turbine wheels, a high-pressure intake passage provided between the compressor wheel and an intake port of an internal combustion engine, a CAC provided on the high-pressure intake passage to cool intake gas, a high-pressure exhaust passage provided between an exhaust port of the engine and the turbine wheel, an EGR passage branched from the high-pressure exhaust passage and connected to the high-pressure intake passage, and an EGR cooler for cooling EGR gas flowing through the EGR passage by coolant flowing through a coolant recirculation passage of the engine. A downstream end of the EGR passage is connected to the high-pressure intake passage at an upstream of the CAC. According to the EGR system, intake gas mixed with EGR gas can be supplied to the engine at desired temperature, so that fuel consumption of the engine can be improved.

主权项

1. An exhaust gas recirculation system comprising:
a turbo charger having a compressor wheel and a turbine wheel; a high-pressure intake passage provided between the compressor wheel and an intake port of an internal combustion engine; a charge air cooler provided on the high-pressure intake passage to cool intake gas; a high-pressure exhaust passage provided between an exhaust port of the internal combustion engine and the turbine wheel; an EGR passage branched from the high-pressure exhaust passage and connected to the high-pressure intake passage; and an EGR cooler for cooling recirculated exhaust gas flowing through the EGR passage by coolant flowing through a coolant recirculation passage of the internal combustion engine, wherein a downstream end of the EGR passage is connected to the high-pressure intake passage at an upstream of the charge air cooler.