Turbocharger compressor diagnostic system
US6298718A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 8, 2000 |
| Grant date | Oct 9, 2001 |
| Priority date | — |
| Expiry date | Mar 8, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A system and method for detecting abnormal operation of a turbocharger compressor reads data from a plurality of sensors and first conducts a series of rationality tests on the sensor data. The tests determine whether the data generated by certain ones of the sensors is accurate or compromised. If a particular sensor fails its corresponding rationality test, an error signal is generated. On the other hand, if all sensor data passes the rationality tests, the compressor performance data is compared to a compressor operation map, and more particularly to surge and choke regions defined by boundary lines on the map. If certain compressor performance data falls into either the surge or choke region, an appropriate abnormal performance signal is generated. In certain embodiments of the invention, the sensor rationality tests are based on a predetermined second order polynomial relationship between two compressor operating parameter, such as mass air flow, boost pressure, turbo speed, etc. In another aspect, a third order polynomial relationship between mass air flow and compressor pressure ratio is used to diagnose an abnormal compressor condition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.