Reduction of Smoke and NOx from Diesel Engines Using a Diesel/Methanol Compound Combustion System

Abstract

This paper presents the concept of a diesel methanol compound combustion (DMCC) system and some experimental results on the application of the system to two diesel engines. In the DMCC system, diesel fuel is used for engine starting and for low load operation. At medium to high load, a fixed amount of diesel fuel is maintained while extra energy is acquired by injecting methanol into the intake manifold to form a homogeneous methanol/air mixture. The system was tested on two 4-cylinder diesel engines: one naturally aspirated and the other turbocharged. In both cases, the DMCC is found to reduce brake specific equivalent fuel consumption, reduce smoke emission, and reduce NOx emission but increase CO and HC emissions.

Feasibility of using less viscous and lower cetane (LVLC) fuels in a diesel engine: A review

“…Yao et al [185] conceived a DMCC system for both naturally aspired and turbocharged diesel engine, wherein, the engine was made to be operated in diesel mode at lower loads and dual fuel mode at higher loads. To accomplish the dual fuel operation, an electronically controlled fuel injection system with low injection pressure of 0.3 MPa was invoked to inject methanol in the inlet manifold.…”

A parametric study on the emissions from an HCCI alternative combustion engine resulting from the auto-ignition of primary reference fuels

“…Therefore no use can be found in displaying the effects of CO The interaction between NO and hydrocarbons has been subject to some study [19][20][21].…”

Optimization of methanol powered diesel engine: A CFD approach

“…A separate fuel injector used to fumigate methanol with the inlet air in fumigation mode and in emulsion mode, an additive should be used to maintain stability of the mixture because of the poor miscibility of diesel -methanol blend [6,7]. Alternatively, a fuel injector can be utilized to introduce methanol in the combustion chamber [8,9]. Out of the above mentioned modes, emulsion mode is seems to be more effective than the fumigation mode in terms of emission parameters, whereas 10% diesel -methanol emulsion is acceptable [10].…”