Abstract: The turbocharged engine in accordance with the present invention comprises an EGR unit having an EGR passage linking an intake passage and an exhaust passage and an EGR valve provided in the EGR passage. The engine further comprises deceleration deciding unit for deciding as to whether a vehicle decelerates, and intake air release unit for opening the EGR valve and causing part of the intake air present in the intake passage to flow into the exhaust passage through the EGR passage when the deceleration deciding unit decides that the vehicle is decelerating.

Abstract: A system (1) for cooling EGR gas and lubrication oil, which is compact, resistive to vibration, and heats the lubrication oil at cold start of an engine (2) while cooling EGR gas. A system housing (10) is directly attached to a lateral wall of a cylinder block (3) such that engine cooling water flows therein. An EGR gas heat exchanger (16) and oil heat exchanger (15) are located in the housing (10) and immersed in the cooling water. Since the two heat exchangers (15, 16) are placed close to each other, high temperature EGR gas flowing in the EGR gas heat exchanger (16) heats low temperature lubrication oil flowing in the oil heat exchanger (15) via the cooling water when the engine (2) is cold. As a result, the viscosity of the lubrication oil drops and it assists easier start up of the engine under a cold condition. Since the single housing (10) is shared by the two heat exchangers (15, 16), the system (1) is compact.