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System for managing the heat energy produced by a motor vehicle heat engine

  • US 7,168,398 B2
  • Filed: 11/08/2002
  • Issued: 01/30/2007
  • Est. Priority Date: 11/13/2001
  • Status: Expired due to Term
First Claim
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1. A system for managing the heat energy developed by a heat engine of a motor vehicle comprising a main system (2) equipped with a main pump (12) to make a coolant fluid circulate between the heat engine (10) and a main cooling radiator (18) having an exchange area and exchanging heat with the external atmospheric air, the main system (2) furthermore comprising a short-circuit pipeline (20) and a heating pipeline (22) comprising an air heater (24), and a secondary loop (4) including a secondary radiator (60) having an exchange area and a secondary pump (58), wherein the main radiator (18) or the secondary radiator (60) is divided into at least two separate heat exchange sections (144, 146), the change from one configuration to the other is carried out in increments, by the switching of a heat exchange section from one circuit to the other, and the main system (2) and the secondary loop (4) are connected by interconnecting means (6) which make it possible to control coolant fluid circulation between the main system (2) and the secondary loop (4) or to prohibit this circulation depending on the load state of the heat engine (10), wherein the main system (4) comprises a three-way (30-1, 30-2, 30-3) thermostatic valve (30), a first way (30-1) connected to the engine pipeline (8), a second way (30-2) being connected to a short-circuit pipeline (20), and a third way (30-3) connected to a main cooling radiator pipeline.

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