Patent ID: 6848397

Claim:
A cooling system, for a motor vehicle engine having indirect charge air cooling, comprising: a general cooling circuit ( 1 ) including a coolant for cooling a power- generating unit ( 2 ) which includes a coolant circulating pump ( 5 ) and a main coolant cooler ( 7 ), an additional cooling circuit ( 3 ) for cooling additional coolant, which branches off at an output point ( 6 ) downstream of the coolant circulating pump ( 5 ) but ahead of the engine ( 2 ) from the general cooling circuit and returns to the latter at an in-coupling point ( 19 ) between the main coolant cooler and the coolant circulating pump ( 5 ), and which includes an additional coolant cooler ( 14 ) and, upstream of the additional coolant cooler ( 14 ), a flow restrictor ( 12 ), said additional coolant cooler being arranged in the air stream in front of the main coolant cooler, and a charge air cooler ( 17 ) for cooling the charge air supplied to the engine ( 2 ), means ( 10 , 21 ) for sensing the coolant temperature and means ( 10 , 10 a ) for controlling the coolant flow through the main coolant cooler ( 7 ) as a function of the sensed coolant temperature, said means ( 10 , 21 ) for sensing the coolant temperature being arranged in a region where the coolant of the general cooling circuit and the additional cooling circuit are mixed.