| 摘要 |
Hot exhaust gas is introduced in front of the outlet of the fuel injector, which may be a port injector 20 as shown or a direct injection injector (fig.4), so that the exhaust gas surrounds the injected fuel to promote the fine particle formation and vaporization of fuel thereby enhancing efficiency of combustion. The exhaust gas can be circulated into the combustion chamber, via an EGR line 30 with an EGR valve 40, to restrict the production of NOx. Also, exhaust gas re-introduced into the combustion chamber though the EGR line 30 is cooled by heat of vaporization of fuel injected from the fuel injector 20 thereby advantageously relieving the installation of an additional cooling system for cooling exhaust gas which is re-circulated into the combustion chamber. |
