The above brief survey of the relevant literatures shows that,
though many studies have examined DMDF combustion on single-
cylinder naturally aspirated light-duty engines, few researchers
have reported DMDF combustion results from multi-cylinder
turbocharged heavy duty engines. Furthermore, hardly any
researchers have focused on the operating range and combustion
characteristics of DMDF combustion. Based on the authors’ previous
studies on DMDF engines, methanol substitution percent
(MSP) and brake thermal efficiency (BTE) of DMDF combustion
depended greatly on engine load. In order to further understand
the effect of MSP on a DMDF engine, this work concentrated on
establishing the operating range with regard to MSP and engine
load on a methanol fumigated six-cylinder turbocharged heavy
duty diesel engine and investigated the combustion characteristics
of conditions at each range bound.