Patent ID: 8151917

Claim:
A cooling system provided for a drive train, which has a first drive system including a first heat-generating drive source and a second drive system including a second heat-generating drive source, the cooling system comprising: a circulation flow path arranged to flow a cooling medium into the first drive system; a second drive system flow path branched off from the circulation flow path and arranged to bypass the first drive system and thereby flow the cooling medium into the second drive system; a flow rate distribution regulator configured to regulate a distribution ratio of a flow rate of the cooling medium flowed into the first drive system to a flow rate of the cooling medium flowed into the second drive system with bypassing the first drive system; an electric pressure feeder configured to pressure-feed the cooling medium through the circulation flow path; a cooling medium temperature detector configured to measure a temperature of the cooling medium; a first state detector configured to detect a driving state of the first drive system; a second state detector configured to detect a driving state of the second drive system; a flow rate demand setting module configured to set a first flow rate demand required for cooling down the first drive system based on the measured temperature of the cooling medium and the detected driving state of the first drive system and to set a second flow rate demand required for cooling down the second drive system based on the measured temperature of the cooling medium and the detected driving state of the second drive system; and a controller configured to control the flow rate distribution regulator and the electric pressure feeder to make the flow rate of the cooling medium flowed into the first drive system and the flow rate of the cooling medium flowed into the second drive system respectively equal to the set first flow rate demand and the set second flow rate demand.