Method of monitoring a dosing agent supply for treating exhaust
AssigneeGM Global Technology Operations LLC
InventorBrent D. Hendrickson
Life of this patent
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Abstract
An exhaust after-treatment system for a vehicle including a dosing agent that is selectively injected into an exhaust from a dosing agent supply includes a first module that determines a level of a dosing agent source and a second module that determines whether the vehicle is at a convenient location for replenishing the dosing agent source. A third module selectively inhibits vehicle operation if the level of the dosing agent source is below a threshold level and the vehicle is at the convenient location.
Claims21
An exhaust after-treatment system for a vehicle including a dosing agent that is selectively injected into an exhaust from a dosing agent supply, comprising:
- a first module that determines a level of a dosing agent source;
- a second module that determines whether said vehicle is at a convenient location for replenishing said dosing agent source based on an oil parameter or a maintenance flag, wherein said oil parameter includes an electrical impedance, and wherein said second module determines that said vehicle is at said convenient location (i) when said electrical impedance indicates an oil change has occurred during a period after a vehicle shutdown and before a vehicle restart or (ii) when said maintenance flag indicates that vehicle maintenance has been performed during a period after a vehicle shutdown and before a vehicle restart;
- and
- a third module that selectively inhibits vehicle operation if said level of said dosing agent source is below a threshold level and said vehicle is at said convenient location.
A method of monitoring a dosing agent in an exhaust after-treatment system of a vehicle, comprising:
- determining a level of a dosing agent source;
- determining whether said vehicle is at a convenient location for replenishing said dosing agent source based on an oil parameter or a maintenance flag, wherein said oil parameter includes an electrical impedance, and wherein said vehicle is determined to be at said convenient location (i) when said electrical impedance indicates an oil change has occurred during a period after a vehicle shutdown and before a vehicle restart or (ii) when said maintenance flag indicates that vehicle maintenance has been performed during a period after a vehicle shutdown and before a vehicle restart;
- and
- selectively inhibiting vehicle operation if said level of said dosing agent source is below a threshold level and said vehicle is at said convenient location.
A vehicle that is powered by an internal combustion engine that produces exhaust, comprising:
- a dosing agent source, which stores a dosing agent that is selectively injected into said exhaust;
- and
- a control module that:
- determines a level of said dosing agent source;
- determines whether said vehicle is at a convenient location for replenishing said dosing agent source based on an oil parameter or a maintenance flag, wherein said oil parameter includes an electrical impedance, and wherein said control module determines that said vehicle is at said convenient location (i) when said electrical impedance indicates an oil change has occurred during a period after a vehicle shutdown and before a vehicle restart or (ii) when said maintenance flag indicates that vehicle maintenance has been performed during a period after a vehicle shutdown and before a vehicle restart;
- and
- selectively inhibits vehicle operation if said level of said dosing agent source is below a threshold level and said vehicle is at said convenient location.
Dependencies are inferred from the claim text.