Abstract
The 1500-cm/sup 3/ engine was tested on AI-93 gasoline and on water/gasoline emulsions (WGEs) with the following compositions: a) 10% water, 1% nonionic surfactants, remainder AI-93 gasoline; b) 20% water, 2% surfactants, remainder AI093 gasoline; c) 40% water, 3% surfactants, remainder A-76 gasoline. Attempts to determine the optimal content of water in the WGE, and to evaluate the feasibility of increasing the engine efficiency (e.g., improving the fuel economy by the use of the WGE). Finds that it is desirable to adjust the engine according to the quantity of added water, depending on the operating conditions, so as to utilize the effect of the water on the gasoline knock resistance and thus avoid a drop in the economy indices and an increase in the unburned hydrocarbon concentration obtained during idling, warmup, and operation at low loads, which are unavoidable when burning a WGE of constant composition.
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