A variety of 'alternative' fuels are being considered as potential future replacements for petroleum-based fuels. One of the leading contenders for replacing diesel fuel in some heavy duty applications is methanol, since methanol can be made from abundantly - available materials such as natural gas, coal, and biomass, and because neat methanol can result in reduced NOx and particulate exhaust emissions relative to diesel fuel. Because of various fuel property differences between methanol and diesel fuel, engine modifications must be made to the conventional diesel engine to allow it to utilize methanol fuel. A patented ignition-assist combustion system initially applied to a 2 valve, 4 stroke Caterpillar 3306 DIT engine (121 mm bore) demonstrated methanol combustion feasibility in a tractor application. This ignition-assist technology has since been transferred to a 4 valve, 4 stroke Caterpillar 3406 DITA engine (137 mm bore) and further evaluated in line-haul truck application in the Canadian Methanol - In-Large-Engines (MILE) Program. Modifications were made to several 3406 DITA diesel engine components. These components included fuel injection pump, fuel nozzles, cylinder head and pistons. Design calculations indicated that these modifications would allow methanol engine performance and major component durability to be approximately the same as those of the diesel.
Methanol-fueled caterpillar 3406 engine experience in on-highway trucks
Methanolbetriebener Motor 'Caterpillar 3406'. Erfahrungen mit LKW's auf Schnellstraßen
SAE-Papers ; Oct ; 1-13
1990
13 Seiten, 31 Bilder, 6 Quellen
Conference paper
English
Methanol-Fueled Caterpillar 3406 Engine Experience in On-Highway Trucks
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