KW 20m III-E? ii lias heea innnii ihni ihe ininne cnn he iinpiuyed hy Ilnpmvulg ine hiaaiiung :Ipapil'y niihe individual plenuni ehninheis 45 end 45 as nnieil in copending applieannn Sci No 002,730 The yaeuuni exisliug in ilie plenuni eliainheis4s aiid4n has heen found in inciease undei inideiange running This is believed in exist due in iesuicaicns in ihe nii l'lnw min me plenuni ehanihea 45 and 4n and also because orievense ow whiehlias been found in occur in the plenum chainheis undeiihis Wndmun Thai is, iheie is some inieireience heiweenilie aw in me individual cylindnii sewed ny ine plenum chainhei passnges s7 undei ihis nin genuihunn in accumuc: wiih Sn No 002.730, an anangemem pin ed lni iucnipoiaaing an addinnual nii ninlseiuiu eneu omie plenum dinnineis 45 and 46 whlch has been found in signinnmly impmVe peirui-innnce undei ihis nnnnlng condiiinu wilhnul ndveisely effecling iheiunning undei nihen cnndiiinns Thai sysieni einplnys a puii crieiiiwaid niiinlei openings 74 :Im providcd wiih ml: sneh opening being (onned al each ieai end uiilie plenuin chambers 45 and 45.1he cpenmgs 74 pmyide an aildiaiunal snnice drain ow which ieducea i.he remicans of aii ow into ilie pleninn chaniheis 45 nnd 45 had, runheinioie, ieducei ihe ieyeme ow which my he inanipomied wnh ihe plenum chainheis. The openings 74 have nsninlleiuoseseeiioual aiea ihan ilie opening 47. An iniencnuneciing pmsngsway 75 is ionned williin a conneciing manifold 75 ihni is boiled so ihe ieai end of ihe plenum chninheis 4s nud 45, so iliai ihe plenum chainneis 45 and as may euinninnienie wiin eneli oiiieini iheend opposiie iheronwnid inlei openings 47. Because ni il-ie rning niilei at me cnglnee ilie connzmng passageway 75 Wm": ine plenum ehninheis 45 and 45 in serve each nihen when each one of than is serving an individual cylinden and hence iheie can be good nii now iuio each an dumbci 45 and 45. in iddiiinu, hecnuse iii ihis imercnnnucun. all nf thus: sepaiase annnsplieiic inleis pinyided by me openings 47 and 74 see served hy ilie shine unnule yalye 53 and an cleaner 54 an as w slmphfy lhe oyemll cnnsiiueiion. The inductloll sysieni of ihe iype ax ihus fat desenhed is suhsianlially she snnie as ihni in copending npplicniion 521 No 002,730 which disclosure is incni-pmnied lieiein hy ieienenee, FIG 5 isa giaphical view showing the mqll: nigiiie speedcnne fart-hm engine wiih the line in indieniing ihe inioiie curve ioiilie engine wlmm ihe inieiconnecling nianilold pmmgcwy 75. Curve r2 shows she qulle curve ionhe engine wlili ihe passageway 75 ll will he sccn ihai ahe ininue curves Pl and n have rink minne ai he iespeehve engine speeds N1 and NZ. However, because ni ihe superimposinnn quhA: innine cums on cach nihei, ilieie in ii valley v ai mid- iange perroinnniee which can he undesimblai In nccoidauce wiih die invenaiou, iheie is provided a ihiolile valve 77 in :he chininunicaiing passageway 75 ihni is page 15