Oxides of Nitrogen from Smaller Gasoline Engine 700145
The new California regulations governing emission of oxides of nitrogen from automobile exhausts present a special problem to small engine manufacturers, for little of the available data enable them to satisfy the requirements and still produce vehicles that have maximum power output and maximum fuel economy. This report provides essential information for designers and alerts them to the danger of adverse effects on engine and vehicle performance resulting from the usual corrective measures of rich mixture, retarded spark timing, and exhaust gas recyling. Engine modifications and an effective gas recyling method are suggested in this report to alleviate these undesirable side effects.
