| Show PA 0 G R U. U r SI 5 ENGINE DESIGN ns NOTED I Early Turn Tutu to l s Predicted Overhead Yale Yal Valve Valve- e Fast East Becoming Standard 1 I I ISit Six Sit Leads eads All Competitors ors I Every ery automobile owner would like I Ito to know the progress that Is bein being made in automobile engine construction construe construe- I tion end And what th the future holds for tor tho the different types 1 both in this country and In Europe The Tho writer has made madea a complete analysis of ot the engine Ine situation situation situation sit sit- and finds find that the overhead val o is fast becoming becoming- the tho American standard and though the tho six cylinder is the tho leader with the tho four tour second tho the j eight third and the twelve last there ther will b be in a few years ears a sudden turn to multi mulU European critics seem to believe that also abroad will the multi cylinder en engine engine en- en gine gin gradually creep into first position It ma may be difficult for many to see how the Iho six cylinder can be displaced but the ra-mo ra me view few was held of ot the four tour not so man many years ago Ideas Tho The Ideas that the eight and the twelve o present mechanical complications lions and that the more cylinders c themore the themore more trouble have been shattered e There are two outstanding features o ot I Ithe the tho multi-cylinder multi engine which will wilt make maJe its appeal all the tho stronger One is its performance and the tho other its ita quietness Smoothness of or t torque great pulling ability on high when thoi tho I car Is running slowly quick slowly quick pickup reduction re reduction re- re of oC vibration are the results re-I re of or j multi-cylinder multi construction Speed and t power while they may be bo had In tho j 4 four or six BL cannot be bo had with the tho same smoothness of ot operation as In eight or twelve e It was believed that the u use e of or eight or twelve cylinders c entailed the tho use or of ofa off offa a n. long or wide wido hood because tho the engine j i took up more room room than a four tour or six I As a matter of or fact we wo now havoc eights with cylinders In a row that are aro- shorter than any six producing th the thOi i same power and speed In Europe tho the Lancia company I 1st IS building a a. twelve cylinder which is v larger than a six and looks exactly like one owing to the casting c. of oC all cyl cyl- cylInders cylinders inders in one ono block blod The two Iwo rows o oI oC ol cylinders are aro only two twenty-two de degrees 1 I apart and only ono one carburetor Is used used- As S Ume timo goes goes goeson on on Iho tho row all rv idea will take hold and wo we shall see many such models in construction In Europe In Europe the tho average car has ha four four- Lou tou cylinders and a speed four transmission transmission transmission sion while at present the American average av average average av- av Is Ig a a. six with a three-speed three trans trans- mission Europeans do not object in the Iho least to shifting gears and they are ara arBnot not so insistent upon obtaining tho high gear performance demanded by by- American buyers hence tho the four der engine with tho the speed four trans trans- mission Gradually though the Europeans European ar coming to American ideas for tho the Par ParL and London shows shows- recently held indicate indi indi- cate cato tho the following ideas that arc being Leins bail taken up practically by all nIl European builders Vacuum fuel feed teed block castInS' castInS castIng casting cast- cast Ing InS of or cylinders removable cylinder cylinder- heads battery batter Ignition electric starting starting and lighting During During- tho tiro war American had wonderful opportunity to work ou out details details- of or design to for the tho postwar engine en engine en- en gine using somo some of or tho the knowledge gained in the design of ot airplane j cn-j on en pines gines These builders ha have o not wo worked l e out their designs as quickly as the tho foreigners foreigners for for- eigners els who already have more moro than thana a dozen overhead valve e engines with overhead camshafts fi Wo 1 o shall see seo these designs ns on our cars a a. year or two hence Engine It I la is a fact that engine vibration and engine torque or pulling ability haa ha havo a bearing on tho lIfo life of ot the tho rest oC of the th car Tako Take a a. two cylinder engine as an art example Tho heavy explosions coming Infrequently Jolt every evory part of or the tho driving driving drivIng ing mechanism Instead of or a thunderous thunderous thunderous thun derous blow infrequently tho the tour four gives twice the Iho number of or explosions but of oC minor magnitude Tho six gives three times tho the number each explosion being slight Tho Thu el eight ht gives four tour tines times tho the number number number num num- ber and the twelve six times as many manyas as a cylinder two Tho The moro more tho number of cylinders the tho greater tho the number of ot smaller maUor explosions In tho the same time hence the less the tho Individual shocks to the Iho whole ting tillS mechanism This is why in in- Ina a L four cylinder car you OU am cm almost fool teel distinct vibrations every tIme tho the on- on Kino gino fires tires and what you OU can feel tho the car parts also o foci |
