Investigating the effects in performance and fuel economy as a result of using exhaust turbocharged engine tractors
その他（別言語等）
のタイトル
排気タービン過給機関塔載トラクタの作業性能と燃 料消費に関する研究
著者（英） Makanga James, Taniguchi Tetsuji, Ohtomo Kohichi
journal or
publication title
Research bulletin of Obihiro Zootechnical University. Series I
volume 14
number 3
page range 267‑277
year 1985‑11‑20
URL http://id.nii.ac.jp/1588/00002116/
月郎．β㍑払〔姑iんiroU几iuリノ4りガ5）．・g67〜277・ 287
Investigating the Effects in Performance and Fuel Economy as aResult of Using Exhaust
Turbocharged Engine Tractors
James MAKANGA＊，TetsujiTANIGUCHI榊and
Koh−ichiOH「110MO＊＊
（Received：Mヰy3l，1985）
Summary
WhileeffortsarebBing madetoproducealtern且tivefuelsinplaceofpetroleum products．itis（｝f eq11alimportance that even more resear仁山iscarriedont aimed at better perform且nCeSinlinewithless fuelconsumption．This wot11d mean higherproduction且tlowprod11Ctionc亡，StS．
Theu＄eOfenglne＄inagrlCulturalmachineryandintheindustria】sectorgoes handin hand with developmentin many countrie5and hence operating them at
lowcostsandhigherperformancesareofvitalimpDrt且rlCe．T11rbochargedengln蔦S areincreaslnglybecoming verycomm（つTland the treTLdjn theiruseiTldicate邑that
theywillbeverym11Chinuseinthefut11re．Aimedattheireconomicsparticul且rly OnfuelconsurTIPtionandlevelofpE・rrOrmanCeaSCOmparedtothen（〕n−t11rbocharged
eng】neSi．e．theconvention81types．rotaryandPTOtestswerecarriedoutfrom Whichthefollowingwere deduccd：
1．ユn PTOtestsit was observed that：
（1）With the use of t11rbocharged engine maximum PTO power outputin−
crease〔＝〕y28％at2200rI〕m eng叩eSIほe（l．
（2〕Atthesameenginespeed maximumPTOtorqueincreasedby43彩wi蝕the useofturbochargedengine．
（3）With Lhe use r）［turb（）Charged eTlgiTLe SpeCific f11elconsumption decreased by between2，O to2．1％as eompared to the nonrturbocharged．Thisindicates energysaving．
2，Inl−OtaryteBtSitwaBObserved that：
（1）Power efficicncyis geTlerally higher with th8uSe Of the turbocharged
enどぅne and thatthetTaCtOris capableofperformingevenathighcrtillagcpitches as for e3（且mple at medilユm ran那往TrlaXimum of210mTn tillage pitch at24．5浴
POWCr（thcrmal）efficicncy were observed for the t11rboch8Z・卵d as compaTed to 150mm and18％化rthenonturbocharged．
＊ Jomo KenyattEiCollegeof＾gricultureandTechnoloR・y，Nair（，hi，Kenya，
＊＊ TJaboTatOry Of Farm Power＆Tractor，Obihiro University of Agriculture′and Veterinary Medicine，ObihiroO80．Japan．
73−
268 J．M▲K▲NGA、； r．でANIGUCだⅠ；K．Ot汀OMO
（之〉TheturbochargedenginetractorcanalBO giveit ES betterperformanqesat
eompar8tivelyhigllerSpeedsmeanlngth8titwDl】1d旭keshor毎rtim8iTICOmpletⅢg field operations，rhamplesin this c8Seinclude higher power efficie†1Cy aIld
abilitytoprovideenoughpowerforsoilpulverip＝ationathigherspeeds．
Combining 1 I且nd 2けthe concl118ion from the experimentis more p｛）Wer 8nd tor（1ue，heavy duty adaptability，ability to ptlrforrn at higher speeds and economicalin fueleonsumption for the turbocharged as comp且red to thやnOn turboch8rged．
used． By forcingitinto the ground some pileSSure r組dings werE）read 象nd re亡Orded．
This w且S repeatedly done for eYery Yad且ble．
A graphilldicatjng th｛）preSSurem叩nit11血自由t Varyingdepthsw且Slaterdrawn（Fig，1）．
A fifth wheelwas11E；edin order to glVe prop8r∈peed figures．the difference betweenit and the tractor wheelspeed easily glVlng8 Closer approximation of slippage．Unlike thc
Coneindex（k威／cが）
O 10 20 30
lntrodudi（In
Likeir】many meehanicalenglneerlng Ori−
ented jobs englneS areVerylmpOrtantin farm maめin釘・y andtheirwideusesho111dgoalong withtheirresearchparLicularlyinp￠rformance and operatingco白極．Thisiswhatmany即Igl−
neef＄，SeieTまtists andm且n11raCturerS且rehavlng iユI mind and hence m（）diric且tir）nS ge邑red towards betもer perrormances a！1d relatively lowoperatiTlgC0日tSaTealwaysrecommended・
Ttli占thenimplies that the orlglnalenglnei日 SOmehow differerlt 行om the present engines and willprobably beevenmoredifferentfrom theotherenglneStObeus甘dinthefut11re．
ExhallSt turもocharged englne traCtOrS haYe for qui地SOmetim郎beenusedandthechances 8r8 that they willin【＝r組Singly be usedin future．With thisin mindthis experimeTltWaS undertakenaimingatinvestigating抽eefLectin perrormance and fueleconomy as are5ult of
that changein design．As pointedabove the aimls bigller perlDr汀1anCe atlow Qperating co馬tSi．e．￠nergy SaVln官andatthesah−etime gettingbetterperfbmance，ith印Ceimpliesthat flほ1consumption，maXimum PTO power and otherrelatedarea8WeTf）Criticallyinvc＄tIgated．
Pr（）eedl汀e
It w如ne（：eSS8ry tO knowhowhardthesoil was as this wouldllaVe SOme efrectin per−
forfIlanCe．Pressure to be exeれed at different Lユepthsis one of the fa【加rs to be considered and うTlthis respecL a cone penetrometer waS
Fig，1一且 Con（〉irldexpr￠Sent且tion
（Centralp｛）Sitit〕n）
74
ThcEffectsinPerformanceofにⅩhaustTurbochargedEngineTractors 269 Rotaryti）］agetests atdifferenttravelspeeds and atlow．mediurn an（1high rangel】TO revol11tions using the below BPeCified rotary tiller 且nd PTO tests were carried out． T〔】
ensure a higher degree of acc11raCy the・teStS were repeatedly carried out and hence the results glVen mainlyln form ofgraphsin thjs paperare act11ally averages of quite an11mber ofreadings．AllnecessarylnformationleadiTlg toaimeddataasforexELmplefuelconsumptユOn an（1P7、o t（）rque Were fed to a data recorder cone−penetrOmeter readings the fifth wheel
readjロビS Were directly fedinto a d且t且 recorder．
Cr）ne jndex（k虞′／血）
0 10 20 30
Which had been connected directly to Various functionalp且rtS． Later after
（）Xperiments the variollS readings in
h h h
recorderwerecomputerizedandgraph8plotted from which the comparison could easiユy be done．Thetesttractorand rotarytil】eTST）eCi fications are as givenin tableland 2 re−
SpeCtively．
AsaTneSizeTlOnpturhocharged englnetTaCtDr was al＄O teSted，the results from which苗7ere compared to those of theturbochargcd engine
tl、且CtOr．
Resultsand Dis（−uSSi（）n
上1rom the 且t）OVe mentjorlerl（：arrie（lout ex Periments the following points as regards
；ヱ一宮屠︻
Fig．トb Coneindex presentation
（Wheeledportion）
Tablel，Tractor specirications
1tem r（onJurbl】C一皿r餅【1 Turbocharged
Totallength mmm To†a】width mm Tot8】hpjg†1†mm Wheelh8SP Inm Front tread nl【ll Rear tr（3ad lnnl
〔71日Hr・an〔二e mm 上1rol止 血、e
Rear Lire
「1㌧＝H】∨・elgIlt kg
♪二IlgiIle
八U O ．U ハU n︶ m 87 49 10 39 っU 1 2 2 1
1440 365 9．5／9246l】R 16．9／H−3蠣PR
2FXIO 4sl王・（〉kp watfユr〔・001ed dieselcngl】1C．3421ce disp】acement．
75
J．MAKANG射で．でANIGUαlI；K．OmoMO
T盆b182・Rotary tiller畠peCiricati（〕nS
27（l
I馳m Speciric且tion
Wid仇 mm 1200
Bl且dediameter mm 213
Totalbladenumber mm 48
Rot8r apositionL・Mand艮runnlng
alhalftractorPTOspeed．
＊でractor PTO：
3po岳itio旭L，M孜mdH．At2200rpm色nglneSpeed，叩号ed5forL．M aT−dfIaTe6衰2，桝田andl、108revQlutinnsperminuteres匹比i鴫1y．
pedor血色nce of turbocha喝ed and nqn−
tl汀boekargせdenginew離dedlユCed．
】．pTOpefform8n∝
（1）M8Ⅹim11m PでOpovero山p11t（tbepoweで delivered by atractt〕rthrp昭hitsPTOsh8．ft）
rromthedyn且皿Om郎ert田tS血ow8anincrea8e わr abbut 2＄％ wi七山 th虐 u馳 Of turboeh温rg由
en由ne at ′2200rpm en如β 雲peed げig．2）．
WithiT】eXP訂imentalconditionst鮎s、fi監ureis
￠loBert8afi即reOr25弼iれCre86e2）．Itisalぎ0
noted that th主s m且Ⅹ1mlまm PTO pow8r Ⅵ7且S 乱Cbi糾ed 8t a relativelyl￠W即e咽iile Speed，
Res111ts from the field experiment写WIlere昏Oil conditions val・ied from time 地 毛ime 且l軸 shQWeくi触tter performan（Ie8 for the t11rb｛）−
Char酢den田口8tra甘t（〕L
（2）With aTlincナe舶e d er喀血e speed tQ t狩yOnd rated，turbocharged ￠ngine tr＆CtO摺 Shて）Wed quitむ anincre温Sein maximum PTO torque．Aも召200rpm￠ngi叩Sp恍￠the tlユrbo−
4
︵SL︶ トU麦己○↑h
PTO s師d（rpm）
Fig．琶 R8laticゝn且bipt・etW印nPTOpDWerandpTOsp腑d 76
TheEffectsinPerforman（7＝〉fExhaustTurhochargedトニngincTractors 271
⁚u︼加︸ 賀b−○︸○↑d
PTO speed（rt）汀1：
Fig．3 RelELtionshipbetwpenPTOtorqueandPTOspeed
︹上Sd＼ヤーー○苫EnSu宍︶芯コーU宅じ邑s
1J「1、O speed けP一丁＝
Fig．4 nelatj（，nSrliphetwccnsT）er：ifi〔‥1uelLてOrLSumPtionandP rO叩eed
77
釘2 J・MARA封GAこT．T蛸IG17加Ⅰ；広．0￡TOMO Ch8rged englneimdicated a m乱裏m也n PT8
tor胆e of43労high町th扱n］1￠n−t11rbocharg由 げig，3）．Thi6fac七al蛸正叩1ie＄thatthetnrbo．
血arged englneis capable Qi■ aGeept一喝 且n OVerloadbyredueingspeedwhileret飢nirlgits 匝rqu8qptbeenglneCrank与hart．
（3）As pointed cLlltin theintroductiOn，CLne Ofthem已J、Ort且rg曽七日inop訂組1n冨m包ehiIl鴎in tlle乳ぎrlCultura18eCtOrS且ndoth息r8reaもislow Operatin官仁0飢S aI通hiか併PerformanceleYels．
R如ucti8ninfbelconsumpti8ni6anOtke卜Way がrgdlユeingoperatingcos七色IT鵬re畠ult昏rrOm 紬8field and those obtainedlhlring PTOte如 indicatea加er組Seinspe￠ificfuel印nSumptユ8n
（amotlntO∫fuelu雪ed perunitpowerperhour）
rorallT8ngeSOfsp￠eddriv8niTluSiTlgatl汀bo−
6h′ar評dengine．hthecageorthePTOtestsit W8gOb8erVedthatthe：SPeCifie、fuelcDn8umptio dec柑舶ed bytetween2．Pto2．1．楚且S COmpared to仇enon−turbo亡harg紀del鳩ine（mg．4）．
2．Field p8rfl）rma†tee
R融和1ts froTⅥthe rolary tests also rev鴨1ed 日Ome b励ter per∫orm且n￠e O∫ turt〉OCharged en酢nea8d舶CTibedbelow．
（1）Power（therTn邑＝effid居hcyWhichw＆Sin
thi日CaSe eXpreSSed as the r8tio ofpowerob−
もai∫ledfr佃門10Bhaftfor七山喝eOperationto fuelp−）Wer Which＼Ⅴ且S Ct）nVモカed valpや Of amo11nt（〕f fuelus￠d by engine td power w8S Ol）SerVed as beinggerl訂山1y highなffQrtlユrbの−
Charged englIle且mleven more吼dYdnt魚geOl】8 thaも′the帥如ei8Capaも1eorp肝rOr餌喝e始n at higher tillage pitches． Tillage pitchi＄
d錦ermindbyther（〉rmular
∴
Where p＝t恒＝i】1agepitch（mm）
〃‥r口taryaXis5peed（rp町）
几：the nlユmb（汀 qr t〉1ad出 わf tiu台T、且も Samel柁rtica】planeintbise8日8B
†ノ：tTaCtC・rtr愚Velsp￠ed（mm／加iTl）
With tbis test￠d tractor figⅥreSiJ】Cluded色 maximurn or280mm pitch汲tヨ昆野叩Weref−
ficiencylow r邑爪ge With七urb如ヒ且rged．M且Ⅹi−
mum or190nlm Pitehatla％powereffiei餌Cy atthesamerangewith∫10n−もurb ｝C柏r酢d，Aも medium range nl且鼠im11m Of■210mm pitcb at 24．5％p8Wer白rficieTICy Were Ob＄en・転d f8ナthe t11rbocharged．Npn−turboeh息rgedgave靴adi咽S Of150mm pitch and18鯖 power effiCiency
釦
忘 残虐義篭h聖賢￡
n 40 80 ユ20 16n 200 240 280
Tillage pitch〔m）
Fig．5 Presや机ation of percent喝e pOWer ef土■iciency8t Vari【）uS Liユ1漁ge pit（）h絡（PTO rpmlく）W rang伊）
−78−
TheEffcctsinPerforl11anCeOfll二ⅩhEluStTurbocharど⇔dEngineTract（一rS 273
∴言主ここ：・⁝エ
ユ20 16（） 200 2411
Til】age pitch（佃）
Fig．6 Pres8ntationofpercenta即pOWererficiencyatvarious ti11agepitches（PTOrpmmediumrange）
〟r：pOWerlossintransmission
〟，：pOWert（−rO】1tllemaChirle
Re5ults for the effect of forwaT（1speed at a constant r〔）tt）r Speed and1800rpm engine speed for the teste（j tractorindicated the followⅢg・
（3）The turbochargeしieロビineis capable of outputing more PT〔）power at higher叩ee（1s as compared tothenf−れ一tuT・br）Charged．Atlow T且nge Speeds could reach even he）「ぐ）Tld2・8m／′s and Pllopoweroでbeyond31PSweTeTeC（〕rded withturbochaTged．Non−turbocharged figuT一台S were且maXiInum Of2．2m／s and15PS（Fig．
7）．Athiか1r即嗜eforwardspeedsol■ov打2上n／s andpowerofover44PSwiththeturbocharged
were p〔1SSible．Non−turbocharge−igavefi首ureS of2，4TTl／s and27PS（Fig．8〕．h4edium T8nge 且1soraYOuredtheturtlf）Uh且rged．Thisindicates abj】jty rnl・mOre pOWer at relative】yト1ig上1er speedsfortheturbocharged．
（4）Higher PTO torque at h癌hprspeeds且re possiblewlththet11rbochar押王ascolnparedto thenonpturbocharged．Atl【）WrangeSpeedsof beyond 2．8m／s and bey（−n（150kgrl−− tOrque could be reached． rllhe Tlしm−tllrhc）Charged
（Fig．5aIld6）．
（21I」ikein many otheT 堀ric111turalma chinery，揮Tfnrmanccandp（プWeTrだquirements for various aetivitjes are affected by the rorw鋸▼d specd of the tra・：tOr．For the rotarY
tillers the velocjty parameter most rT−equently l】Sedbothasadesighnan（1useparal−1eter3）is the diTn抑SioIlless ratio r、■ of the rotりr per ripheralvelocity to the TlltlChinc forward ve−
locitygiven bvtheformu】ar＝
尺・以
T＝￣￣
wher￠ 月：rOt仁）r radius（mm）
a）：rOtatiDnalrotorvelocity（rd（1／f，）
Ⅴ：maChineforwardvel⊂〉City（mm／s）
月1srarelyvariedwherpas山and Vcaneasily t）e Varied．】n tllis case Vw8S made the vari−
able．
The p亡珊er Ⅳ reqⅥire（11く）l−且rOtarさr tiller isexpressed by：
〟＝〟。＋〟†±〃♪＋〃γ＋〟．
Where 〃ぐ：T）OWPrt〔〉Cutthesoil 机：POWerhthrowthesoil
Ⅳ汐：！）【）Wer tO Pullor hold back the ther雨arytiller
274 J・MAⅨÅNGÅ；で．TAⅣ1GUCR【；K．0IJTOM8
︵盟二 L璧萱チpE
Fig・7 Rel如ionshipbetweenPTOpoweroutp、utand他ryl堀
travelspe豆d（PTOrpm】owrange）
完ご・声名色芦こ
Travels弼d（m／′s）
Fig・8 R￠1atio王1岳hipb鍔tWeerlPTOpoweroutputandvarying trave18peedげでOrpmhiき錘r汁ngP）
recorded a maximum 口r 2．2m／s sptゝed8刀d 25kgfmtorq11e（Fig．9ト m4edlumrangefigures also茅aVe better reちults for the turbocヒ姐r郎d 稔nginざ．1n high range．speedwasobserved as b扇ng 且1imt血g ractor tho】増h turboeharg由 still上ndicated b飢ter performance．
一 80
（5）RやIa雨ely higher poむ8r efricieney at higher sppedR are pOSSil）1e with the t11rbo一 班arge｛1engines・L口W ran酢gaVe better per・
‡ ￠rm8nCeS With the 七Ⅵrbochar晋d 由Vin賢 慮 maximtlm〔）f23％power erficiency at2．8rnノs SPeed anく1the¶Pロtl】rbocharged8ma滋imllm
TheEffectsinPerformanceofExha11StTurbochargedEngineTractors 275
＝Turbu O一−−−O N（〕n−turbo
︹邑空 ︼uき邑○↑d
／一1／
ノ． ￣ ． ー0一・9ぜ
？レーー 0 0
● 0 0
2．6 3．い 3．d
1．4 1．8 2．2
Travelspeed（軋／s）
0．6 】．0
20
忘こ訂昂茸琶hむ声OL
1．4 1．8 2．Z
′1▼ravels【妃ed（血ノ■s）
Fig．10 Relation屈hipbetweeT】印〕Wererfi（†iencyandvarying travel月Peed（PTO
of15落powererficiencyat2．2m／皐（下ig．10）．
（6）Soilpulv打izationi日anOtberimp（汀tant r8CtOrintill且geOpel・且tiく）nS．Perforユれan￠ClevcIs as referlled to speQds revealed that the turbfト charged ellglne prOVides汀10re pOWer for the tiller to pulveri凱コ8lot m〔）re SOils tn引町ほ11er diametersinthis case underll）mmiTlて1jameter
rpm】owrange）
and that thisisp（）SSibkevemaLhighersp￠eds．
This f■aet together wjth hw ruelcqnsumpti（）n
as prevjously poiT止ed p11t meanS higherb8tter
performance atlowoperatingcostsan aimiTl 即1yb11SlnノeSSandfarmingactivities．
In the experimer】t beヨt performance＄ Were Obtaiれe（latlow range．Witllthe use（〕r the 81
J．MAIくANGA；T．TAⅣIGUCⅢ；K．OHTOMO
︹㌔＝壱三應膏苧居宅眉も古瓦号就農首
0．G l．0 1．4 1．8 2．2 2．6 3 ハ
T下卑Velslだd（Ⅲノs：
Fig．11Effectofspeedchan官eSind曙rRやOfsoilpu）verizaもion
抽rbo￠harged en離ne a印）eed Lげ2．射領海8L弛％
pnlv声riz乱tion was reach8d． Hi如er sp七eds W即・e且1誌O pOSSibl烏but atl￠W PereentageSかr pⅥ1verizati仰．Th㌣Tは潤一tu再）灯Chargeてipngin肯く1 traetoreould pr耶ideenou紳POⅥ痩rt8pulYer ize 且 SOllqⅧntitv of ab（】ut the′S且me p即
￠印tage bl北at alow倉r gr〔）und卸商（1r）ー泳hゎut 2．1m／s（Fig．11）．
Sinlilar test笥 With anotherlractor were ca汁i￠d 血七 色nd rnore（汀】pss 昌a汀Ie reSUlts
Qbtained．
A（！knolVl（！d酢m色nt
ⅣⅠりChi日iTlVOIve【i油 川rrylnぎ nut an eX一 匹山郎郁Or this Lype BuCh that eo叩er如ion 且¶d r粗dinessin availlng hcilities fclr the e耶桝im）ヨntare（げvit且】importa¶Ce．I¶t最6
respe￡t then anlOl嗜 Other or卵nizatipns ar】d iildiYidlは1已，5illC〔 re th8nks are かホ tげ 甑e
】shil（aⅥ・aJlm8．Shlb肌r8Machinery Co，．Ltdり 払r the．loan of tr良CtOTS，theIl￠kkaiFortl Tractor CoりIJtd‥for痛el（旭n Of mea糾】rin首 ぬcilities如1d alllabぐ〉ratf〉ry Stal■土■／Btudents巳nd
any other鼠1Ⅳhr）tlaVe eittier physically orin f8rmOf包dvicep且rbcip且kdi】1thecolIrSePfthe
一息2
色XperimentaTlddatacomIJiliIlg．
Referen13eS
l）（ブh札止es（i．1モwING；Al】al〕、Out turゎか
（1harglTlg．Tmpl白me11t良nd Tractt）r．No．4．
198U．
2′）〜1色rk ZrMMRRMAN：TurtlOCh且rgerS ♪ぬg−
ress rep〔汀t．1mplement and Tra℃ねr．No．
9，19臥）．
3）lJ且IneS〔；．HENDRIC監and＼l7illia爪立．GILL；
比）t札ry LiIl打desigr】p且rameterヨ，p且r8 3．
‡iati〔川r押rう！】hef81aⅢ1f（汁War（1vel（）d損料 Trans．ofthp ASAlこ1971．
4）Cl肌d CtJLPJN；F8rnl maehinery nin軌 郎1itioTl，〔二Ⅰ・oSby山ckwo（1d＆S亡叫197軋
5＝．M．BEENY andI〕．．J，（；REIG；Effibiency of a rotary cultivat飢∴J．0ぎAgric．軌g′り
VOl．川．19f；5．
6さti．比口ATlミMAN et aいEnergy required to
下）lJhpTi∠ぐSOil且t dirferellt de官陀eS Of com−
pat：LiorいJ．01八gric．加g‥VOl，1P，1965．
TheI∃ffectsinPerformanceofExhaustT11rbochargedEngirLeTractors 271 1．PTO試験
（1）過給機関を使用することによりPTO抽出力は 機関回転数22㈲rpmに新一て封欝増した。
（2）同⊥回転数においてPTO軸最大トルクは詑％
過給機関が勝一）た。
（3）燃料消費率は2．ロー2．1鬼；無過給機関より減った。
2．ロータリ耕実験
（1）出力（熱）効率は．週給横関を硬うことにより よりよくなった。更に過給機朗塔載トラクタは，例え ば過給機関搭載トラクタの耕うんピッチ 22侶mn燈 大出力効率25％に対して無過給トラクタのそれぞれ l梢m∫nおよぴ17％の如く．無追給トラクタより大
きい耕うんピッチと高い出力効率で作業することが可
能である。
（2）過給機関塔載トラクタは比較的高速作葉状態に
おいて高性能を発揮する。このことはまたほ場作業を 完了するのにより短かい時間ですむことになる。この
場合過給機塔戦トラクタは出力効率がより高いことと 高速作業における十壌の破砕に十分な山力を供給でき
る能力をもっていることをノJけ。
以上．のことから過給機関塔載トラクタは撫過給トラ
クタに較べるとより大きい出力およびトルク∴高負荷
を受け入れる能力，高速作業を遂行する能力それに燃 料消費長の経済性に優れている。
排気タービン過給機関塔載トラクタの 作業性能と燃料消費に関する研究
ジェームス・マカンガ
〔ジョモケニヤッタ農コニ大学）
谷口哲司・大友功→
（帯広畜産大学農業動力学教室）
摘 要
化石燃料に代わる代替燃料の研究が各所において行
われているが，燃料消費率のより少なくなおかつより rよい性能を月指し′た研究もまた重要である。このこと
は低い生産費で高収益を⊥げることにつながる。
農業機械と産業部門への各種エンジンの適用は各国
で徐々に行われてきており．したが一ってそれらの機械
を低コストでかつ高性能で運転することは非常に重要
なことである。過給機閏は徐々に増えてきており，こ
の傾向は将来過給機関が非常に普及することを示して
いる。，本研究は，過給機関塔戟トラクタの燃料〜門当の
経済性を無過給機関のそれと較べた場合の性能の差を
みたものである。すなわら，ほ場におけるロータr」桝 実験と室内におけるPTO試験を子テい比較検討したb 結果を以下tこ′Jけ。
帯大研報，14r1985）ニ267〜277．
83
