METHOD OF COLLECTION AND REUSE OF EXHAUST HEAT IN A DIESEL-POWERED VEHICLE
First Claim
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1. A method for a vehicle, comprising:
- at engine start-up, delivering heat stored in phase change materials in a heat battery to a heat exchanger with a bypass coupled in an exhaust system;
after exhaust temperature exceeds a first threshold, delivering heat from the heat battery to a vehicle cabin; and
after exhaust temperature exceeds a second, higher threshold, delivering heat from the heat exchanger to charge the heat battery.
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Abstract
A heat transfer method for an engine is disclosed herein utilizing a heat battery configured to store waste exhaust heat in phase-chase materials for use during a subsequent engine start. By reusing waste exhaust heat in this manner, exhaust emissions may be reduced, and delays in heating the vehicle cabin and other vehicle systems after engine start may be reduced.
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Citations
20 Claims
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1. A method for a vehicle, comprising:
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at engine start-up, delivering heat stored in phase change materials in a heat battery to a heat exchanger with a bypass coupled in an exhaust system; after exhaust temperature exceeds a first threshold, delivering heat from the heat battery to a vehicle cabin; and after exhaust temperature exceeds a second, higher threshold, delivering heat from the heat exchanger to charge the heat battery. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A diesel-powered truck with a crew cab, comprising:
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a heat battery, including phase changing materials, mounted under a rear bench seat of the crew cab; a heat exchanger coupled to an engine exhaust in a forward engine compartment, the heat exchanger comprising a heat transfer section, a bypass section, and a vacuum-actuated bypass mechanism; a pump circulating heat transfer fluid between the heat battery and the heat exchanger; and emission control devices coupled in an underbody of the truck downstream of the heat exchanger. - View Dependent Claims (13, 14, 15, 16, 17)
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18. A method for controlling a heat transfer system of a diesel-powered truck, comprising:
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at engine start while exhaust gas temperature is below a first threshold, opening a first heat transfer loop directing heat transfer fluid from a heat battery containing phase change material positioned under a rear bench seat of a crew cab to a heat exchanger coupled in an engine exhaust passage at a forward engine compartment; when exhaust gas temperature exceeds the first threshold, opening a second heat transfer loop circulating heat transfer fluid from the heat battery to a cabin of the truck, and opening a third heat transfer loop circulating heat transfer fluid from the heat battery to one or more systems of the truck requiring heat. - View Dependent Claims (19, 20)
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Specification