Method and apparatus for controlling combustion in generator gas engine
US7801668B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 29, 2007 |
| Grant date | Sep 21, 2010 |
| Priority date | — |
| Expiry date | Jan 6, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY04S10/50
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A method and apparatus are provided for controlling combustion in a pilot ignition gas engine connected to an electric generator of a power generator unit installed near a coal mine. The engine utilizes recovered methane gas and ventilation air methane gas from the coal mine by adjusting methane concentration to produce a lean air-methane gas mixture. Gas engine output torque is controlled to maintain |ΔTd|−|ΔTs|>0, where |ΔTd| is the absolute value of change rate of load torque Td required to drive the generator in relation to engine rotation speed, and |ΔTs| is the absolute value of change rate of output torque Ts in relation to engine rotation speed at an intersection of torque curves. Excess air ratio is controlled to be 2 or larger so that lean mixture burning is performed while avoiding misfiring and knocking by controlling the mixing ratio of recovered methane gas with ventilation air methane.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.