Dimethyl ether (DME) can be converted easily from methanol in a catalytic reactor, and it has very good compression ignition characteristics. This paper presents experimental results on a compression ignition methanol engine with DME as an ignition improver. The results show that engine operation is sufficiently smooth with high efficiency without spark or glow plugs. In the experiments, two methods for DME introduction were investigated: an aspiration and a torch ignition method. The aspiration method introduces DME into the intake manifold, and is structurally simple but suffers from poor emission charcteristics at partial loads, and a large amount of DME is required for ignition. With the torch ignition method, DME is introduced into a torch ignition chamber during the intake stroke, and significant reductions in both the necessary DME quantity and emissions were obtained. Engine operation was also attempted with DME-dissolved methanol fuel without ignition aids.
A study of a compression ignition methanol engine with converted dimethyl ether as an ignition improver
Untersuchung der Kompressionszündung des Methanolmotors mit veredelten Dimethyläther als Zündungsverbesserer
SAE Technical Papers ; 1-11
1992
11 Seiten, 24 Bilder, 3 Tabellen, 8 Quellen
Aufsatz (Konferenz)
Englisch
SAE Technical Papers | 1992
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