Temperature compensation system for minimizing sensor offset variations
US6658345B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 18, 2001 |
| Grant date | Dec 2, 2003 |
| Priority date | — |
| Expiry date | May 7, 2022 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M26/33
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A temperature compensation system for minimizing sensor offset variations includes an engine controller having stored therein a model of sensor operating behavior over temperature. In one embodiment, the sensor is a &Dgr;P sensor for sensing a differential pressure across a flow restriction mechanism disposed between an exhaust manifold and an intake manifold of an internal combustion engine. In this embodiment, the &Dgr;P sensor is preferably thermally coupled to a structural component of the engine whose operating temperature is readily discernable; e.g., the engine cooling system. Alternatively, the &Dgr;P sensor may include a temperature sensor coupled thereto. In either case, the engine controller is preferably responsive to transitions of the key switch to gather “hot” and “cold” temperature data under zero &Dgr;P conditions. This information is then used to constantly update the &Dgr;P sensor model.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.