| 摘要 |
PURPOSE:To ignite even a fuel with low conbustibility reliably and quickly by focusing a laser beam from a laser beam generating unit on a heat conducting plate in a combustion chamber by a focusing lens and igniting fuel with the heat energy. CONSTITUTION:Fuel is filled into a combustion chamber 9 by a fuel feeding unit 5. A laser beam from a laser beam generating unit 1 is focused on a heat conducting plate 4 (metal material with high heat conductivity such as steel iron) stuck to a light window 3 (heat-resistant glass) by a focusing lens 2. Since this laser beam has a high power density, the temperature of the heat conducting plate 4 rises very quickly to ignite the fuel. The temperature rise of the heat conducting plate 4 can be easily controlled in response to the combustibility (igniting temperature) of fuel by changing the radiation time of the laser beam. Accordingly, the nonignition of fuel can be prevented by the duration of the laser beam radiation time. In addition, the laser beam can be efficiently transmitted without being affected by the soot or the like in the combustion chamber until the laser beam reaches the heat conducting plate 4.
|
