Cost structure method including fuel economy and engine emission considerations
AssigneeGeneral Motors Corporation
InventorsAnthony H. Heap, William R. Cawthorne, Gregory A. Hubbard
Life of this patent
Estimating the term…
Abstract
A powertrain control selects engine operating points in accordance with power loss minimization controls. Power loss contributions come from a variety of sources including engine power losses. Engine power losses are determined in accordance with engine operating metrics such as power production per unit fuel consumption and power production per unit emission production. Engine power losses are combined in accordance with assigned weighting into a single engine power loss term for use in the power loss minimization control and operating point selection.
Claims15
A method for controlling a powertrain including an internal combustion engine, comprising:
- providing first power loss terms corresponding to engine operating points that attribute power losses to engine operation at the engine operating points relative to an engine operating point that is maximally efficient with respect to engine power per unit fuel consumption;
- providing second power loss terms corresponding to engine operating points that attribute power losses to engine operation at the engine operating points relative to an engine operating point that is maximally efficient with respect to engine power per unit emission production;
- combining the first and second power loss terms at respective engine operating points into a total engine power loss term;
- providing additional power loss terms corresponding to powertrain subsystem power losses at respective engine operating points;
- aggregating the total engine power loss term and the additional power loss terms into a total powertrain loss term at respective engine operating points;
- determining as the substantially minimum powertrain power loss the minimum aggregated total engine power loss term and additional power loss terms at respective engine operating points;
- and
- controlling the engine toward engine operating points based on said substantially minimum powertrain power loss.
A powertrain system, comprising:
- an engine;
- and
- a computer based controller including a storage medium having a computer program encoded therein for determining an engine torque at a predetermined engine speed that result in a substantially minimum powertrain power loss, wherein said substantially minimum powertrain power loss is based upon engine fuel consumption and emission production.
A method for controlling a powertrain including an internal combustion engine, comprising:
- providing an engine power loss term based upon engine fuel consumption and emission production;
- and
- controlling the engine based on said engine power loss term.
Dependencies are inferred from the claim text.