Patent ID: 7267084
Filing Date: 2007-09-11
Classification: F01P

Abstract:
1. A cooling and heating device for an internal combustion engine ( 6 ) which has coolant inlet ports ( 4 , 5 ) and a coolant return port ( 10 ), said device comprising a main coolant pump ( 1 ) for supplying a coolant to the internal combustion engine ( 6 ) via the coolant inlet ports ( 4 , 5 ), a first flow control unit ( 3 ) for controlling the coolant flow to the coolant inlet ports ( 4 , 5 ), a second flow control unit ( 17 ) arranged in a coolant return line ( 10 ) from the engine ( 6 ), said second flow control unit ( 17 ) directing the coolant, depending on the temperature thereof, to an inlet of the main coolant pump ( 1 ) either via a large cooling circuit ( 20 ) including an air/fluid cooler ( 21 ) or via a small cooling circuit ( 18 ) bypassing the air/fluid cooler ( 21 ), a transmission oil heat exchanger ( a third coolant flow control unit ( said third flow control unit (