Patent ID: 6772715
Filing Date: 2004-08-10
Classification: F01P,F02M,F16H

Abstract:
A cooling circuit of a liquid cooled internal combustion engine (2a, 2b) with a transmission (3) of a motor vehicle, said cooling circuit (1) comprising a pump (10) for delivering cooling water to said engine (2a, 2b), a cooling water circulating line (4) connected to said engine (2a, 2b) and including an electrical valve (5) for selectively directing cooling water either to a radiator (6) or a transmission oil/cooling water heat exchanger (9), lines connecting the inlet of the pump (10) to the outlets of the transmission/cooling water heat exchanger (9) and the radiator (6), a transmission oil circulation line connected to an outlet of said transmission and extending to a controlled valve (18) for selectively conducting the transmission oil through the transmission oil/cooling water heat exchanger (9) or a transmission oil cooler (7) of the radiator (6) before returning it to the transmission through a return line (19) extending to the transmission (9) and a heater circuit extending from the engine to the pump (10) and including a vehicle heater (14) and an engine oil heater (16) arranged in the heater circuit downstream of the vehicle heater (14).