. Automotive industries . of the liquid itselfat that temperature and this is apparently the averagecondition in an engine manifold. Norman calls attention to the fact that heating theair, or the whole charge, will unquestionably give re-duced maximum power with the engine on the test-stand. On the other hand it will also make it possibleto operate the engine satisfactorily over a greater rangeof mixture ratio. It is a question whether this smoothergeneral operation is not worth more on the road thanan increase of power on the test-stand amounting toperhaps 5 to 10 per cent. In any case, withi
. Automotive industries . of the liquid itselfat that temperature and this is apparently the averagecondition in an engine manifold. Norman calls attention to the fact that heating theair, or the whole charge, will unquestionably give re-duced maximum power with the engine on the test-stand. On the other hand it will also make it possibleto operate the engine satisfactorily over a greater rangeof mixture ratio. It is a question whether this smoothergeneral operation is not worth more on the road thanan increase of power on the test-stand amounting toperhaps 5 to 10 per cent. In any case, within certainlimits, the leanest mixture means the greatest economyand air heating, even up to 250 deg. Fahr., is found togive improved economy by enabling the engine to runon leaner mixtures. Dickinson points out that not only good operating con-ditions but good acceleration can be obtained with aneconomy mixture if the temperature is maintained aiabout the right point. 1246 AUTOMOTIVE INDUSTRIES THE AUTOMOBILE June 16, 1921. Fig. 8—Ensign fuel convertor. EXHAUST, GAS INI ET Fig. 11—Section ofexhaust heated in-take pipe designedby Nelson. The most general means of maintaining the desiredtemperature of charge is to apply exhaust heat to theinlet manifold. This subject will be considered underthe next heading, manifolding and distribution. Oneother method of supplying the heat necessary will bementioned here, namely, that of burning a small portionof the charge for the purpose of heating and vaporizingthe remaining portion. Two devices operating on thisprinciple which have seen quite extensive use are theEnsign fuel converter illustrated in Fig. 8, and the Pack-ard fuelizer, so-called, illustrated in Fig. 9. The En-sign device is so arranged that heavy ends of the fuelnot carried out of the carbureter in the air stream arecollected below a gauze in the base chamber, togetherwith some air. The rich mixture thus formed in thebase chamber is ignited by the spark plug and theproduct
Size: 1901px × 1315px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, booksubjectaeronautics, bookyear
