Method for estimating and correcting bias errors in a software air meter
US5070846A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 12, 1991 |
| Grant date | Dec 10, 1991 |
| Priority date | — |
| Expiry date | Feb 12, 2011 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D2200/0402
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A method for estimating and correcting bias errors in a vehicle system which implements iterative prediction and estimation to determine a measure of at least one determinable vehicle engine parameter determines if the vehicle engine is in a substantially steady state condition, determines a measure of error between the predicted and measured values of a control parameter while the vehicle is in the steady state condition, estimates a system bias in response to the determined error, and offsets the system bias in subsequent predictions, thereby reducing the error between the predicted and measured values of the control parameter and increasing the accuracy of the estimations of the determinable vehicle parameter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.