Abstract
The pilot injection pattern was optimized, and some effects of pilot injection on combustion and exhaust emissions were investigated using a single-cylinder DI diesel engine. The results are as follows. (1) In order to avoid the increase of smoke, both a small-hole-diameter nozzle and very accurate control of pilot injection quanTITY and pilot-main interval are essential. These improve the atomization of the pilot fuel and the air entrainment into the main spray. (2) With pilot injection, NOx is not reduced at the injection timing of TDC but is gradually reduced at more retarded injection timing. This is because the main combustion is accelerated at early injection timing but is decelerated at retarded injection timing, due to the promotion of ignition. (3) The effect of pilot injection on NOx reduction is generally small ; however, pilot injection well prevents HC increase under light-load, injection-timing-retard conditions.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
