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Heat exchanger apparatus for a plurality of cooling circuits using the same coolant

  • US 5,526,873 A
  • Filed: 10/02/1992
  • Issued: 06/18/1996
  • Est. Priority Date: 07/19/1989
  • Status: Expired due to Term
First Claim
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1. An air cooled engine radiator apparatus for a liquid cooled engine requiring cooling circuits at differing temperatures from a common coolant supply comprising a first elongated fluid tank having at least one inlet neck and at least one outlet neck, a second elongated fluid tank having at least one outlet neck, a bank of heat exchanger tubes being mounted at one end on said first fluid tank to be in fluid communication therewith and at the other end on said second fluid tank to be in fluid communication therewith, said first and second fluid tanks being divided into a plurality of compartments separated by internal partitions extending transversely with respect to the longitudinal direction of said first and second fluid tanks, which longitudinal direction is perpendicular to the direction of the tubes of said bank, said compartments dividing said bank of heat exchanger tubes into a plurality of coolant flow paths comprising a main sub-bank and at least one secondary sub-bank, said main sub-bank including a larger number of heat exchange tubes than employed in said at least one, or each, secondary sub-bank, the fluid flow path in said main sub-bank being in a single directional pass while the fluid flow path in said at least one secondary sub-bank being in opposed directional passes;

  • and outlet connection means being provided on said first and second fluid tanks to permit connection of said main sub-bank and said at least one secondary sub-bank to a cooling circuit of said engine.

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