| 摘要 |
An engine cooling system for the circulation of a liquid coolant through an engine comprises a main heat exchanger for cooling the coolant, and an auxiliary, liquid to liquid heat exchanger 34 by which a second liquid such as fuel or oil can be cooled by the coolant. The auxiliary heat exchanger 34 has a heat exchanger matrix 41 within a heat exchanger chamber 44, an inlet chamber 49 at one end of the heat exchanger matrix 41 which has an inlet 47 for incoming coolant, an outlet chamber 56 at the other end of the heat exchange matrix 41 which has an outlet for outgoing coolant, and a thermostat 61 in the outlet chamber 56 to regulate the flow of coolant through the heat exchanger matrix 41. The inlet 47 comprises a jet 75 which directs coolant directly towards the heat exchanger matrix 41 and in the direction of the thermostat 61. The jet 75 may comprise an insert 71 having a bore of reduced diameter acting as a flow restrictor. The heat exchanger matrix 41 comprises a number of heat exchange tubes extending between the inlet chamber 49 and the outlet chamber 56. In an alternative embodiment the invention comprises an auxiliary, liquid to liquid heat exchanger 34 for an engine cooling system. |
