# US 2013/0159225 A1 · Model based calibration of inferential sensing > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2013/0159225 A1 - Document ID: US20130159225A1 - Status: Published application - Kind: A1 - Application number: 13/331,812 - Filed: 2011-12-20 - Published: 2013-06-20 - Earliest claimed: 2011-12-20 - Assignees: Honeywell International Inc. - Inventors: David Germann; Gregory E. Stewart; Daniel Pachner - Web page: https://patentgrep.com/patent/US20130159225A1 ## CPC - G01D 18/008: {with calibration coefficients stored in memory} - F02D 41/2432: {Methods of calibration} - F02D 41/26: using computer, e.g. microprocessor - F02D 2041/1423: {Identification of model or controller parameters} - F02D 2041/1437: {Simulation} - G01D: MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR - F02D: CONTROLLING COMBUSTION ENGINES (vehicle fittings, acting on a single sub-unit only, for automatically controlling vehicle speed B60K31/00; conjoint control of vehicle sub-units of different type or different function, road vehicle drive control systems for purposes other than the control of a single sub-unit B60W) ## Abstract An inferential sensor module is incorporated into an engine simulation model. One or more parameters for the inferential sensor module are calibrated using one or more of engine measurement data and the engine simulation model. The calibration is performed such that a difference between an inferred signal predicted by the inferential sensor module and a signal measured on an engine is minimized. The inferential sensor module and the one or more calibrated parameters are loaded into an engine control unit in order to predict inferred variables. ## Claims ### Claim 1 A system comprising: one or more of a computer processor and a computer storage device configured to: store an engine simulation model; incorporate an inferential sensor module into the engine simulation model; and calibrate one or more parameters for the inferential sensor module using one or more of engine measurement data and the engine simulation model, such that a difference between an inferred signal predicted by the inferential sensor module and a signal measured on an engine is minimized. ### Claim 2 (depends on 1) The system of claim 1, comprising an engine control unit comprising the inferential sensor module and the one or more calibrated parameters. ### Claim 3 (depends on 1) The system of claim 1, wherein the engine simulation model is configured to predict a plurality of engine properties. ### Claim 4 (depends on 1) The system of claim 1, wherein the engine simulation model is calibrated using measured on-engine data, the on-engine data comprising model input signals and measurements of a plurality of engine properties. ### Claim 5 (depends on 1) The system of claim 1, wherein the engine measurement data comprises one or more of a pressure, a flow, a temperature, a speed, a gas composition, and a function of a pressure, a flow, a temperature, a speed, or a gas composition. ### Claim 6 (depends on 1) The system of claim 1, wherein the computer processor is configured to calibrate the inferential sensor module when all inputs to the inferential sensor module are available via the engine measurement data but a subset of these inputs are replaced by signals predicted by the engine simulation model. ### Claim 7 (depends on 1) The system of claim 1, wherein the computer processor is configured to calibrate the inferential sensor module when one or more inputs to the inferential sensor module are unavailable in the engine measurement data that is used for calibration of the inferential sensor module, and to receive signals predicted by the engine simulation model and to substitute the engine simulation model signals for the unavailable engine measurement data. ### Claim 8 A process comprising: storing an engine simulation model into one or more of a computer processor and a computer storage device; incorporating an inferential sensor module into the engine simulation model; and calibrating one or more parameters for the inferential sensor module using one or more of engine measurement data and the engine simulation model, such that a difference between an inferred signal predicted by the inferential sensor module and a signal measured on an engine is minimized. ### Claim 9 (depends on 8) The process of claim 8, comprising transmitting to an engine control unit the inferential sensor module and the one or more calibrated parameters. ### Claim 10 (depends on 8) The process of claim 8, wherein the engine simulation model comprises a control oriented model. ### Claim 11 (depends on 8) The process of claim 8, wherein the engine simulation model predicts a plurality of engine properties. ### Claim 12 (depends on 8) The process of claim 8, comprising calibrating the engine simulation model using measured on-engine data, the on-engine data comprising model input signals and measurements of a plurality of engine properties. ### Claim 13 (depends on 8) The process of claim 8, wherein the engine measurement data comprises one or more of a pressure, a flow, a temperature, a speed, a gas composition, and a function of a pressure, a flow, a temperature, a speed, or a gas composition. ### Claim 14 (depends on 8) The process of claim 8, comprising calibrating the inferential sensor module when all inputs to the inferential sensor module are available via the engine measurement data but a subset of these inputs are replaced by signals predicted by the engine simulation model. ### Claim 15 (depends on 8) The process of claim 8, comprising calibrating the inferential sensor module when one or more inputs to the inferential sensor module are unavailable in the engine measurement data that is used for calibration of the inferential sensor module, and receiving signals predicted by the engine simulation model and substituting the engine simulation model signals for the unavailable engine measurement data. ### Claim 16 A computer readable storage device comprising instructions that when executed by a processor execute a process comprising: storing an engine simulation model into one or more of a computer processor and a computer storage device; incorporating an inferential sensor module into the engine simulation model; and calibrating one or more parameters for the inferential sensor module using one or more of engine measurement data and the engine simulation model, such that a difference between an inferred signal predicted by the inferential sensor module and a signal measured on an engine is minimized. ### Claim 17 (depends on 16) The computer readable storage device of claim 16, comprising instructions for transmitting to an engine control unit the inferential sensor module and the one or more calibrated parameters. ### Claim 18 (depends on 16) The computer readable storage device of claim 16, wherein the engine simulation model comprises a control oriented model; and the engine simulation model predicts a plurality of engine properties. ### Claim 19 (depends on 16) The computer readable storage device of claim 16, comprising instructions for calibrating the engine simulation model using measured on-engine data, the on-engine data comprising model input signals and measurements of a plurality of engine properties. ### Claim 20 (depends on 16) The computer readable storage medium of claim 16, wherein the engine control unit uses the inferential sensor module and the one or more calibrated parameters to predict an inferred variable.