System and method of stoichiometric combustion for hydrogen fueled internal combustion engines
First Claim
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1. A system comprising:
- a hydrogen fueled internal combustion engine configured to produce an exhaust gas;
a fuel system configured to provide a flow of hydrogen fuel and a flow of ambient air to the engine;
an EGR system, configured to provide a flow of recirculated gas which includes the exhaust gas;
a controller configured to operate the fuel system, and the EGR system such that a torque of the engine is controlled and the engine receives the flow of hydrogen fuel, the flow of ambient air and the flow of recirculated gas in a stoichiometric fuel/air ratio;
at least one sensor configured to provide data to the controller for calculating the stoichiometric fuel/air ratio; and
a mixture comprising the hydrogen fuel, the ambient air and the recirculated gas provided to the engine in the stoichiometric fuel/air ratio by the fuel system, the EGR system, the controller and the sensor.
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Abstract
A hydrogen-fueled internal combustion engine utilizes either internal or external exhaust gas recirculation (EGR), while providing an overall stoichiometric fuel/air ratio. An EGR system provides recirculated exhaust gas to the engine, and an engine controller regulates fuel flow to control torque and achieve a stoichiometric fuel/air ratio. A three-way catalyst can be applied to the exhaust gas to produce near-zero emissions. In addition, turbocharging or mechanical supercharging can also be used to increase power.
61 Citations
33 Claims
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1. A system comprising:
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a hydrogen fueled internal combustion engine configured to produce an exhaust gas; a fuel system configured to provide a flow of hydrogen fuel and a flow of ambient air to the engine; an EGR system, configured to provide a flow of recirculated gas which includes the exhaust gas; a controller configured to operate the fuel system, and the EGR system such that a torque of the engine is controlled and the engine receives the flow of hydrogen fuel, the flow of ambient air and the flow of recirculated gas in a stoichiometric fuel/air ratio; at least one sensor configured to provide data to the controller for calculating the stoichiometric fuel/air ratio; and a mixture comprising the hydrogen fuel, the ambient air and the recirculated gas provided to the engine in the stoichiometric fuel/air ratio by the fuel system, the EGR system, the controller and the sensor. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A system comprising:
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a hydrogen fueled internal combustion engine having at least one cylinder configured to produce an exhaust gas; a fuel system configured to provide a flow of hydrogen fuel and a flow of ambient air to the cylinder; an EGR system configured to provide a flow of recirculated gas which includes the exhaust gas to the cylinder; an air &
EGR flow control valve configured to control the flow of ambient air and the flow of recirculated gas to the cylinder;a three-way exhaust catalyst configured to remove one or more emission gases from the exhaust gas; an engine controller configured to operate the fuel system, the EGR system and the air &
EGR flow control valve such that a torque of the engine is controlled, throttling work is minimized and the engine receives the flow of hydrogen fuel, the flow of ambient air and the flow of recirculated gas in a stoichiometric fuel/air ratio;a plurality of sensors configured to provide data on engine temperature, engine pressure, the flow of ambient air and the flow of recirculated gas to the engine controller for calculating and controlling the torque of the engine and the stoichiometric fuel/air ratio; and a mixture comprising the hydrogen fuel, the ambient air and the recirculated gas provided to the engine in the stoichiometric fuel/air ratio by the fuel system, the EGR system, the air &
EGR flow control valve, and the engine controller. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. A method of operating a hydrogen powered internal combustion engine comprising:
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providing a flow of hydrogen fuel to the engine; providing a flow of ambient air to the engine; providing a flow of recirculated exhaust gas to the engine; mixing the flow of recirculated exhaust gas and the flow of ambient air; determining the flow of hydrogen fuel, the flow of ambient air and the flow of recirculated exhaust gas to the engine necessary to form a mixture comprising the hydrogen fuel, the ambient air and the recirculated exhaust gas in a stoichiometric fuel/air ratio; regulating the flow of hydrogen fuel, the flow of ambient air and the flow of recirculated exhaust gas to the engine to control a torque of the engine and form the mixture in the stoichiometric fuel/air ratio; and burning substantially all of the hydrogen fuel in the mixture provided to the engine. - View Dependent Claims (28, 29, 30)
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31. A method of operating a hydrogen powered internal combustion engine having at least one cylinder comprising:
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providing a flow of hydrogen fuel to the cylinder; providing a flow of ambient air to the cylinder; trapping or drawing exhaust gases into the cylinder; determining the flow of hydrogen fuel, the flow of ambient air and a flow of the exhaust gases to the cylinder necessary to achieve a stoichiometric fuel/air ratio; regulating the flow of hydrogen fuel, the flow of ambient air and the flow of exhaust gases to the cylinder to control a torque on the engine, to minimize throttling work and to provide a mixture comprised of the hydrogen fuel, the ambient air and the exhaust gases in a stoichiometric fuel/air ratio; and burning substantially all of the hydrogen fuel in the mixture provided to the cylinder. - View Dependent Claims (32, 33)
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Specification