WAVELET-BASED ARTIFICIAL NEURAL NET COMBUSITION SENSING
First Claim
1. A method for controlling an internal combustion engine, comprising determining a combustion characteristic of an individual combustion event of the engine by:
- concurrently sampling an ionization signal and determining at least one engine operating parameter during a combustion event of the internal combustion engine, transforming the ionization signal with a wavelet filter, extracting at least one critical signal feature from the ionization signal that has been transformed by the wavelet filter; and
processing the at least one critical signal feature and the at least one engine operating parameter through an artificial neural network; and
controlling the internal combustion engine based upon the combustion characteristic.
1 Assignment
0 Petitions
Accused Products
Abstract
A method and apparatus for real-time measurement of combustion characteristics of each combustion event in each individual cylinder coupled with an ability to control the engine based upon the combustion characteristics are shown. The invention includes using selective sampling techniques and wavelet transforms to extract a critical signal feature from an ionization signal that is generated by an in-cylinder ion sensor, and then feeds that critical signal feature into an artificial neural network to determine a desired combustion characteristic of the combustion event. The desired combustion characteristic of the combustion event includes a location of peak pressure, an air/fuel ratio, or a percentage of mass-fraction burned, among others. The control system of the engine is then operable to control the engine based upon the combustion characteristic.
26 Citations
23 Claims
-
1. A method for controlling an internal combustion engine, comprising
determining a combustion characteristic of an individual combustion event of the engine by: -
concurrently sampling an ionization signal and determining at least one engine operating parameter during a combustion event of the internal combustion engine, transforming the ionization signal with a wavelet filter, extracting at least one critical signal feature from the ionization signal that has been transformed by the wavelet filter; and
processing the at least one critical signal feature and the at least one engine operating parameter through an artificial neural network; and
controlling the internal combustion engine based upon the combustion characteristic. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
-
-
17. A method for determining a combustion characteristic of an internal combustion engine, comprising
concurrently sampling an ionization signal and determining at least one engine operating parameter during a combustion event; -
transforming the ionization signal with a wavelet filter;
extracting at least one critical signal feature from the ionization signal that has been transformed by the wavelet filter; and
processing the at least one critical signal feature and the at least one engine operating parameter through an artificial neural network.
-
-
18. A system to control an internal combustion engine, comprising a controller operably connected to:
-
at least one output device of the internal combustion engine, at least one ion sensor operable to measure an ionization signal from a combustion event of the internal combustion engine, and at least one engine sensor operable to measure at least one engine operating parameter;
wherein said controller is operable to;
concurrently sample an ionization signal using the at least one ion sensor and determine at least one engine operating parameter using the at least one engine sensor during a combustion event, transform the ionization signal with a wavelet filter, extract at least one critical signal feature from the ionization signal that has been transformed by the wavelet filter, and process the at least one critical signal feature and the at least one engine operating parameter through an artificial neural network to determine at least one combustion characteristic of the engine; and
wherein the controller controls the at least one output device of the internal combustion engine based upon the at least one combustion characteristic of the engine. - View Dependent Claims (19, 20, 21, 22)
-
-
23. A system to determine a combustion characteristic of an internal combustion engine, comprising:
-
a controller operably connected to;
at least one output device of the internal combustion engine, at least one ion sensor operable to measure an ionization signal from a combustion event of the internal combustion engine, and at least one engine sensor operable to measure at least one engine operating parameter;
wherein said controller is operable to;
concurrently sample an ionization signal using the at least one ion sensor and determine at least one engine operating parameter using the at least one engine sensor during a combustion event, transform the ionization signal with a wavelet filter, extract at least one critical signal feature from the ionization signal that has been transformed by the wavelet filter, and process the at least one critical signal feature and the at least one engine operating parameter through an artificial neural network.
-
Specification