Patent ID: 9359944
Filing Date: 2016-06-07
CPC Classification: F02B,F02D,F02M,Y02T

Claim Text:
1. A method of controlling an exhaust gas recirculation apparatus for heavy construction equipment comprising: an engine; a turbocharger, coupled to and configured to receive exhaust gas discharged from the engine, which rotates a turbine by using the exhaust gas discharged from the engine, and compresses air, which is supplied to the engine, by a compressor connected to the turbine through a connecting shaft; an intercooler coupled to the compressor and the engine which cools compressed air flowing into the engine; a high-pressure exhaust gas recirculation (EGR) line which is provided with a high-pressure EGR cooler and a high-pressure EGR valve, and does not pass through the turbocharger; a hybrid EGR line which is provided with a hybrid EGR valve and a hybrid EGR cooler, and does not pass through the turbine of the turbocharger but passes only through the compressor; a low-pressure EGR line which is provided with a low-pressure EGR valve and a low-pressure EGR cooler, and passes through the turbocharger; and an engine control unit, the method comprising: