Patent ID: 8528529

Claim:
An exhaust gas recirculation (EGR) assembly, comprising: a U-shaped EGR cooler passage housing an EGR cooler having two cooler elements, the cooler passage configured such that exhaust gas passes through at least one of the two EGR cooler elements; a bypass passage connected in parallel to the EGR cooler passage that selectively permits exhaust gas to bypass the EGR cooler; a first EGR valve located upstream of the bypass passage for controlling the flow of exhaust gas through the bypass passage; a second EGR valve for controlling flow of exhaust gas through the EGR cooler passage; an intermediate bypass passage located between the two EGR cooler elements to selectively connect the EGR cooler passage to the bypass passage; and a third EGR valve for controlling the flow of exhaust gas through the intermediate bypass passage to the bypass passage.