Air supply device for a diesel engine in a vehicle

摘要

The system comprises a fresh air inlet (22) and an inlet (23) for exhaust gas to be recycled in the engine (20). There are two gas circulation branches (24,25) extending between the fresh air inlet and the engine, one of which (25) comprises a cooler (26) connected to the air inlet and whose outlet is connected to the inlet of a first butterfly valve (27) whose outlet is connected to the engine. The other branch comprises a heat exchanger (28) with inlet connected to the air inlet and outlet connected to the inlet of a second butterfly valve (29) whose outlet is connected with the outlet of the first butterfly valve, to the engine. The inlet of the gas to be recycled is connected through a control valve (30) to the other branch, between the exchanger and the second butterfly valve.