Exhaust hydrocarbon injection control system and method
AssigneeGM Global Technology Operations LLC
InventorsJason Daniel Mullins, Thomas Larose, JR., James M. Perrin, Paul Jasinkiewicz
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Abstract
A system comprises an injection control module and a fuel film module. The injection control module controls a flow rate of fuel injected into an exhaust system to adjust a temperature of exhaust gas. The fuel film module determines an accumulation rate of fuel on a surface of the exhaust system based on the flow rate of the fuel. The fuel film module determines a release rate of fuel from the surface of the exhaust system based on a flow rate of the exhaust gas. The injection control module adjusts the flow rate of the fuel based on the accumulation rate and the release rate.
Claims20
A system comprising:
- an injection control module that controls a flow rate of fuel injected into an exhaust system to adjust a temperature of exhaust gas;
- a fuel film module that determines an accumulation rate of fuel on a surface of the exhaust system based on the flow rate of the fuel and that determines a release rate of fuel from the surface of the exhaust system based on a flow rate of the exhaust gas,
- wherein the injection control module adjusts the flow rate of the fuel based on the accumulation rate and the release rate.
A method comprising:
- controlling a flow rate of fuel injected into an exhaust system to adjust a temperature of exhaust gas;
- determining an accumulation rate of fuel on a surface of the exhaust system based on the flow rate of the fuel;
- determining a release rate of fuel from the surface of the exhaust system based on a flow rate of the exhaust gas;
- and
- adjusting the flow rate of the fuel based on the accumulation rate and the release rate.
Dependencies are inferred from the claim text.