Vehicle emissions management

A method of balancing engine performance and engine emissions of an engine in a vehicle in real time, the method comprising:

• sensing operation data indicative of an engine response during a current engine operation that includes a supervisory control of engine emissions;
• evaluating, using a controller and based on the operation data, a response model to determine engine performance deviation data corresponding to an expected baseline engine performance and an expected current engine performance at the current engine operation;
• and
• setting a performance constraint in response to evaluating the model, the performance constraint being set such that the engine performance deviation data is maintained at a controls objective that inhibits deterioration of the engine performance over time;
• wherein the supervisory control is based on operating points along a fuel-emissions tradeoff curve that includes calibrations for a low emissions operating point, a baseline operating point, and a best fueling operating point;
• and wherein the operating points correspond to a set of rail pressure and air handling references for the engine.

A method of balancing engine performance and engine emissions of an engine in a vehicle in real time, the method comprising:

• sensing operation data indicative of an engine response during a current engine operation that includes a supervisory control of engine emissions;
• evaluating, using a controller and based on the operation data, a response model to determine engine performance deviation data corresponding to an expected baseline engine performance and an expected current engine performance at the current engine operation;
• and
• setting a performance constraint in response to evaluating the model, the performance constraint being set such that the engine performance deviation data is maintained at a controls objective that inhibits deterioration of the engine performance over time;
• wherein the engine performance deviation data is equal to a change in engine performance divided by the expected baseline engine performance;
• and wherein the change in engine performance is equal to the expected current engine performance minus the expected baseline engine performance.

A method of determining an engine performance of an engine in a vehicle, the method comprising:

• sensing operation data indicative of an engine response during a current engine operation;
• determining an evaluation window comprising a length of time over which the engine performance is to be evaluated;
• evaluating, using a controller and based on each of the operation data and the evaluation window, a response model to determine a current engine performance at the current engine operation;
• and
• setting a performance constraint in response to evaluating the model, the performance constraint being set such that the current engine performance is maintained at a controls objective that inhibits reduced engine performance;
• wherein the length of the window is adjustable over time based on engine operating conditions;
• wherein the length of the window is made longer than a nominal length when the engine operating conditions include low fueling regions on an engine torque curve;
• and
• wherein the length of the window is made shorter than the nominal length when the engine operating conditions include high fueling regions on the engine torque curve.

A method of determining an engine performance of an engine in a vehicle, the method comprising:

• sensing operation data indicative of an engine response during a current engine operation;
• determining an evaluation window comprising a length of time over which the engine performance is to be evaluated;
• evaluating, using a controller and based on each of the operation data and the evaluation window, a response model to determine a current engine performance at the current engine operation;
• and
• setting a performance constraint in response to evaluating the model, the performance constraint being set such that the current engine performance is maintained at a controls objective that inhibits reduced engine performance;
• wherein the evaluation window has an upper limit and a lower limit;
• wherein at least one of the upper and lower limits is based on one or more of regulatory requirements and regulatory cycles;
• and wherein the lower limit does not change across singular modes of steady state regulatory cycles.

A method of determining an engine performance of an engine in a vehicle, the method comprising:

• sensing operation data indicative of an engine response during a current engine operation;
• determining an evaluation window comprising a length of time over which the engine performance is to be evaluated;
• evaluating, using a controller and based on each of the operation data na the evaluation window, a response model to determine a current engine performance at the current engine operation;
• and
• setting a performance constraint in response to evaluating the model, the performance constraint being set such that the current engine performance is maintained at a controls objective that inhibits reduced engine performance;
• wherein the current engine performance is fuel economy;
• wherein the performance constraint is a fuel economy constraint;
• and wherein the controls objective is either a performance range such that the current engine performance is maintained within the performance range or a performance threshold such that the current engine performance is maintained within the performance threshold.

A method of determining an engine performance of an engine in a vehicle, the method comprising:

• sensing operation data indicative of an engine response during a current engine operation;
• determining an evaluation window comprising a length of time over which the engine performance is to be evaluated;
• evaluating, using a controller and based on each of the operation data and the evaluation window, a response model to determine a current engine performance at the current engine operation;
• and
• setting a performance constraint in response to evaluating the model, the performance constraint being set such that the current engine performance is maintained at a controls objective that inhibits reduced engine performance;
• wherein the engine is under supervisory control for emissions;
• wherein the supervisory control is based on operating points along a fuel-emissions tradeoff curve that includes calibrations for a low emissions operating point, a baseline operating point, and a best fueling operating point;
• and wherein the operating points correspond to a set of rail pressure and air handling references for the engine;
• wherein the response model is indicative of engine performance for transient and steady state operation at each operating point for each of the calibrations;
• and
• wherein the controller is configured to interpolate additional operating points between at least two of the calibrations.

A method of managing engine emissions, the method comprising:

• sensing operation data indicative of an engine response;
• evaluating, based on the operation data, a response model to determine engine performance deviation data corresponding to an expected baseline engine performance and an expected current engine performance at the current engine operation;
• and
• setting a first performance constraint in response to evaluating the model, the first performance constraint being set such that the engine performance deviation data is maintained at a controls objective that inhibits deterioration of the engine performance over time;
• wherein at least one of:
• the engine performance deviation data includes fuel rate deviation data, and the performance constraint includes a fuel rate constraint;
• and
• the engine performance deviation data includes brake specific fuel consumption (BSFC) deviation data, and the performance constraint includes a BSFC constraint.

A method of managing engine emissions, the method comprising:

• sensing operation data indicative of an engine response;
• evaluating, based on the operation data, a response model to determine engine performance deviation data corresponding to an expected baseline engine performance and an expected current engine performance at the current engine operation;
• and
• setting a first performance constraint in response to evaluating the model, the first performance constraint being set such that the engine performance deviation data is maintained at a controls objective that inhibits deterioration of the engine performance over time;
• wherein the plurality of instructions, when executed by a processor, further cause the processor to:
• determining an evaluation window comprising a length of time over which the engine performance is to be evaluated;
• evaluating, based on each of the operation data and the evaluation window, a response model to determine a current engine performance at the current engine operation;
• and
• setting a second performance constraint in response to evaluating the model, the second performance constraint being set such that the current engine performance is maintained at a controls objective that inhibits reduced engine performance.

A method of managing engine emissions, the method comprising:

• sensing operation data indicative of an engine response;
• evaluating, based on the operation data, a response model to determine engine performance deviation data corresponding to an expected baseline engine performance and an expected current engine performance at the current engine operation;
• and
• setting a first performance constraint in response to evaluating the model, the first performance constraint being set such that the engine performance deviation data is maintained at a controls objective that inhibits deterioration of the engine performance over time;
• wherein the length of the window is adjustable over time based on engine operating conditions;
• and wherein the evaluation window has an upper limit and a lower limit;
• wherein at least one of the upper and lower limits is based on one or more of regulatory requirements and regulatory cycles;
• and wherein the lower limit does not change across singular modes of steady state regulatory cycles.