Patent ID: 8534571
Filing Date: 2013-09-17
Classification: F01P

Abstract:
1. A cooling system comprising: a propulsion system; a coolant heater connected in series to said propulsion system; a heater core connected in series with said coolant heater and said propulsion system; a radiator between said heater core and said propulsion system connected in series between said coolant heater, and said propulsion system, upstream of said propulsion system and downstream of said heater core; a bypass line between said radiator and said propulsion system that bypasses said radiator, wherein said cooling system is configured to distribute a coolant between said radiator and said propulsion system based on a second set point temperature; a first temperature sensor between said bypass line and said propulsion system to measure a first coolant temperature of coolant flowing into the propulsion system; and a second temperature sensor between said coolant heater and said heater core to measure a second coolant temperature of coolant flowing into said heater core, wherein said cooling system is configured to selectively operate said bypass line and said coolant heater based on said first and second coolant temperatures during a heating event thereby minimizing a quantity of energy consumed by the coolant heater; such that during a heating event, said first coolant temperature set point is adjusted to match said second temperature set point, said coolant flows through said radiator when said first coolant temperature is above said first temperature set point and bypasses said radiator when below said set point, and said coolant heater is energized when said second coolant temperature is below said second temperature set point and de-energized when said second temperature is above said second set point.