Device for connecting a secondary heat exchanger to an engine cooling system
A secondary heat exchanger device can be connected to a primary engine cooling system by providing a flow restrictor and upstream and downstream ports, wherein the flow restrictor is disposed between the upstream and downstream ports. A heat exchanger can be connected in fluid communication with the upstream and downstream ports to receive a flow of coolant liquid that results from a differential pressure between the upstream and downstream ports because of the pressure drop caused by the flow restrictor.
1. An engine cooling system including both a primary cooling system having a coolant conduit carrying coolant for cooling said engine and an induced flow secondary cooling system, wherein coolant flows from upstream to downstream through said coolant conduit of said primary cooling system, said primary cooling system comprising:
a flow restrictor disposed within a tubular member which is removably connected in serial fluid communication with said coolant conduit of said primary cooling system in said coolant conduit of said primary cooling system, said flow restrictor creating a differential pressure thereacross in response to coolant flow through said coolant conduit of said primary cooling system, wherein the pressure on the upstream side of said flow restrictor is greater than the pressure on the downstream side of said flow restrictor;
a port disposed on said tubular member and communicating with said coolant conduit upstream of said flow restrictor;
said induced flow secondary cooling system comprising:
a peripheral heat exchanger communicating with said port and receiving coolant from said coolant conduit of said primary cooling system, wherein coolant flow to said peripheral heat exchanger is induced by said differential pressure across said flow restrictor in said coolant conduit of said primary cooling system.
2. The engine cooling system according to claim 1 wherein said port comprises a first port, and comprising a second port communicating with said coolant conduit of said primary cooling system downstream of said flow restrictor, and wherein said peripheral heat exchanger has an inlet communicating with said first port, and has an outlet communicating with said second port, and wherein coolant is induced by said pressure differential across said flow restrictor to flow from said coolant conduit of said primary cooling system upstream of said flow restrictor through said first port then through said peripheral heat exchanger then through said second port to said coolant conduit of said primary cooling system downstream of said flow restrictor.
3. The engine cooling system according to claim 2 wherein coolant flow from said peripheral heat exchanger of said induced flow secondary cooling system through said second port re-joins coolant flowing through said flow restrictor in said coolant conduit of said primary cooling system downstream of said flow restrictor.
4. The engine cooling system according to claim 3 wherein coolant flow rate through said primary cooling system is reduced by said induced coolant flow through said induced flow secondary cooling system, and wherein said flow rate reduction is as much as 10%.
5. The engine cooling system according to claim 3 wherein said first and second ports are disposed on said tubular member which is removably connected in serial fluid communication with said coolant conduit of said primary cooling system, and wherein said flow restrictor is disposed within said tubular member between said first and second ports.