Method and apparatus for measuring cetane number of diesel fuel
US6609413B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 2, 2000 |
| Grant date | Aug 26, 2003 |
| Priority date | — |
| Expiry date | Aug 2, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N33/2829
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method of continually measuring the cetane number of a diesel fuel, the method comprising the steps of:(a) providing a diesel engine having means for selectively supplying at least three diesel fuels to the engine, a first actuator for varying the injection timing of the engine, a second actuator for varying the fuel flow of the engine, and a third actuator for varying the compression ratio of the engine;(b) providing a first supply of a diesel fuel of known cetane number, a second supply of a diesel fuel of different known cetane number and a third supply of a diesel fuel of unknown cetane number to be measured, the third supply being connected to a diesel fuel blending system;(c) in a first cycle selectively and alternately supplying the first, second and third supplies to the diesel engine, and for each supply, controlling the first actuator to achieve an injection timing of a predetermined angle before top dead centre, controlling the second actuator to achieve a predetermined fuel flow and controlling the third actuator to achieve a predetermined diesel fuel ignition delay by varying the compression ratio of the engine;(d) determining the cetane number of the third supply by…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.