Performance and Combustion Characteristics of a Glow-Ignition Two-Stroke Engine 2004-01-1407
The performance and combustion characteristics of a miniature two-stroke, glow ignition engine are investigated. The objective of the work is to determine the effects of three independent variables, namely: the proportion of nitromethane in the fuel, glow plug rating (‘cold’, ‘medium’ and ‘hot’), and air/fuel ratio, in order to improve understanding of the engine performance and combustion processes.
Analysis of the data has shown that all of the parameters varied have an important effect on the performance and combustion characteristics of the engine. These effects include:
the ‘medium’ glow plug shows a clear trend of increased power output with increase in nitromethane content of the fuel
the ‘hot’ plug does not appear to initiate combustion earlier than the other plugs
use of the ‘cold’ plug caused rapid pressure rise and high maximum combustion pressure in some cases, probably due to auto-ignition of the mixture
the glow ignition engine shows greater cycle-by-cycle variability than a two-stroke spark ignition engine.
These results may allow further investigation of the use of this type of engine for low power applications.