Virtual emissions monitor for automobile and associated control system
US5682317A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 23, 1996 |
| Grant date | Oct 28, 1997 |
| Priority date | — |
| Expiry date | Jul 23, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N33/0034
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An internal combustion engine (360) is provided with a plurality of sensors to monitor the operation thereof with respect to various temperature measurements, pressure measurements, etc. A predictive model processor (322) is provided that utilizes model parameters stored in the memory (324) to predict from the sensor inputs a predicted emissions output. The model is trained with inputs provided by the sensor and an actual emissions sensor output. During operation, this predicted output on line (326) can be utilized to provide an alarm or to be stored in a history database in a memory (328). Additionally, the internal combustion engine (260) can have the predicted emissions output thereof periodically checked to determine the accuracy of the model. This is effected by connecting the output of the engine to an external emissions sensor (310) and taking the difference between the actual output and the predicted output to provide an error. This is compared to a threshold and, if the error exceeds the threshold, the predictive model processor (322) can be placed in a training operation wherein new model parameters are generated. Additionally, retraining could take place external to the …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.