SAE
Technical Paper 2012-01-0382, 2012, doi:10.4271/2012-01-0382
High
Efficiency and Low Pollutants Combustion: Gasoline Multiple Premixed
Compression Ignition (MPCI)
Hong-Qiang Yang - Tsinghua Univ; Shi-Jin Shuai - Tsinghua Univ; Zhi
Wang - Tsinghua Univ; Jian-Xin Wang - Tsinghua Univ
Abstract:
Authors
propose a novel combustion mode known as multiple premixed compression ignition
(MPCI) for gasoline engines. The MPCI mode can be realized by two or more times
gasoline injections into cylinder with a high pressure around the compression
TDC and featured with a premixed combustion after each injection in the
cylinder. This differs from conventional
gasoline direct injection compression ignition (GDICI) modes such as
homogeneous charge compression ignition (HCCI) mode with gasoline injection occurred
in intake stroke, and partially premixed compression ignition (PPCI) mode with
multiple gasoline injections in intake and compression strokes before the start
of combustion (SOC).
The spray and combustion of the MPCI mode alternate as
“spray-combustion-spray-combustion” near the TDC, rather than the
“spray-spray-combustion” sequence of conventional PPCI gasoline engines. Since
the combustion process of the MPCI mode is controlled by the multiple gasoline
injections, the SOC and pressure rise rate (PRR) can be controlled easily and
effectively through injection timing, injection split ratio and number of the
injections.
Full Text Source (Subscription or Fee): http://papers.sae.org/2012-01-0382/
No comments:
Post a Comment