Invention Grant
US07895838B2 Exhaust gas recirculation apparatus of an internal combustion engine and control method thereof 有权
内燃机废气再循环装置及其控制方法

Exhaust gas recirculation apparatus of an internal combustion engine and control method thereof
Abstract:
An exhaust gas recirculation apparatus of an internal combustion engine includes a turbocharger provided with a turbine in an exhaust passage and a compressor in an intake passage, a low pressure EGR passage which connects the exhaust passage downstream of the turbine with the intake passage upstream of the compressor, a high pressure EGR passage which connects the exhaust passage upstream of the turbine with the intake passage downstream of the compressor; an exhaust gas control catalyst provided in the exhaust passage downstream of the turbine and upstream of the low pressure EGR passage; and EGR gas amount changing device for simultaneously changing amounts of EGR gas flowing through the low pressure EGR passage and the high pressure EGR passage such that a temperature of the exhaust gas control catalyst is within a target range.
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