Heater coolant circulation system for vehicle providing matched

Details Heater coolant circulation system for vehicle providing matched Heater coolant circulation system for vehicle providing matched

1983-07-22

1985-04-02

Bennett, Henry

Heating systems

Heat and power plants

Vehicle

123543, 165 41, B60H 102

Patent

active

045082642

ABSTRACT:
A first heat exchanger for heating the wall of an engine intake passage by engine coolant is connected in series with a parallel connection of a second heat exchanger for heating the interior of a passenger compartment and a bypass conduit via a changeover valve which directs flow of coolant alternatively either through the first heat exchanger and the bypass conduit in series and not through the second heat exchanger for summer use, or through the first heat exchanger and the second heat exchanger in series and not through the bypass conduit for winter use. The bypass conduit system has a higher coolant flow resistance than the second heat exchanger, so that the amount of heating applied to the wall of the engine intake passage is automatically reduced when the heating of the passenger compartment is switched off for summer use as compared in winter use where the heating of the passenger compartment is switched on.

REFERENCES:
patent: 2807245 (1957-09-01), Unger
patent: 3762385 (1973-10-01), Hollnagel
patent: 4404948 (1983-09-01), Feltrin

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