| 摘要 |
<p>PURPOSE:To realize a low NOx by sucking exhaust gas by means of a preheating air of great momentum and burning a primary fuel in a mixture of the preheating air and the exhaust gas of low oxygen concentration which are mixed due to an agitating effect of an ejector. CONSTITUTION:A preheating air supply port 6 opened to an rear end surface of a primary combustion chamber 2 is provided and restricted at its outlet portion to form an ejector 7 which sucks exhaust gas from an opening provided over the entire circumference of a rear end portion of a peripheral wall of the primary combustion chamber 2. Thus, the exhaust gas is effectively sucked from an exhaust gas sucking passage by a preheating air of great momentum from the preheating air supply port 6, so that a primary fuel is made to burn in a mixture of the preheating air and the exhaust gas of low oxygen concentration which are mixed due to an agitating effect of the ejector 7. Accordingly, it is possible to suppress a primary combustion at a low temperature even if the mixture is high in temperature. Therefore, a low NOx can be realized.</p> |
