Journal
FUEL
Volume 85, Issue 5-6, Pages 695-704Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.fuel.2005.08.041
Keywords
partial homogeneous charge compression ignition; exhaust gas recirculation; emission characteristics
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This work investigates partial HCCI (homogeneous charge compression ignition) combustion as a control mechanism for HCCI combustion. The premixed fuel is supplied via a port fuel injection system located in the intake port of DI diesel engine. Cooled EGR is introduced for the suppression of advanced autoignition of the premixed fuel. The premixed fuels used in this experiment are gasoline, diesel, and n-heptane. The results show that with diesel premixed fuel, a simultaneous decrease of NOx and soot can be obtained by increasing the premixed ratio. However, when the inlet charge is heated for the improved vaporization of diesel fuel, higher inlet temperature limits the operational range of HCCI combustion due to severe knocking and high NOx emission at high premixed ratios. Gasoline premixing shows the most significant effects in the reductions of NOx and soot emissions, compared to other kinds of premixed fuels. (C) 2005 Elsevier Ltd. All rights reserved.
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