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US 2015/0089943 A1Published application
Methods and systems for hybrid vehicle waste heat recovery
AssigneeFord Global Technologies, LLC
InventorsQuazi Ehtesham Hussain, David Richens Brigham, Mark John Jennings
Life of this patent
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Abstract
Systems and methods for operating an engine that includes an exhaust gas heat recovery system are described. The system may selectively or contemporaneously supply energy from engine exhaust gas to generate electricity or warm the engine. In one example, exhaust gas energy raises a temperature of a heat transfer medium and the heat transfer medium is routed to an engine coolant heat exchanger or an expander via a bypass valve.
Claims20
An engine system, comprising:
- an engine including an evaporator position along an exhaust system;
- an expander in fluidic communication with the evaporator;
- a condenser in fluidic communication with the evaporator;
- an engine coolant heat exchanger in thermal communication with the condenser, the engine coolant heat exchanger including an output that is in fluidic communication with an input of the evaporator.
1 more element
A method for operating an engine, comprising:
- operating an engine;
- extracting engine exhaust gas heat via an evaporator and converting the engine exhaust gas heat to electrical energy via an expander in a first operating mode;
- and
- extracting engine exhaust gas heat via the evaporator and transferring the engine exhaust gas heat to engine coolant via a heat exchanger in a second operating mode.
1 more element
A method for operating an engine, comprising:
- operating an engine;
- contemporaneously increasing engine coolant temperature and electrical output of a generator via adjusting a bypass valve that routes a heat transfer medium from an evaporator to an expander and an engine coolant heat exchanger during a third operating mode.
Dependencies are inferred from the claim text.