1.classification & isdfntro 2010

8/10/2019 1.Classification & Isdfntro 2010

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SyllabusOfce Hours (F416) Phone ext 5712Object !e o" course

#$$ly en% neer n% theory to & esel en% ne &es %nan& o$erat on' Pre$are "or otor sect on o" S*+ , cense -xa.

6/11/2009 1

Internal Combustion Engines(ICE)


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/ou 0 ll be e!aluate& on -xa.s Ho.e0orass %n.ents (not all %ra&e&) ,abs an&class $art c $at on

-ach 0ee 0e 0 ll & scuss an en% neer n%scenar o relat n% to en% ne o$erat on or&es %n-ach 0ee 0e 0 ll re! e0 S*+ , cense

3uest ons relat n% to the course .ater al*ru s n% !s' Par n%

6/11/2009 2

Tests Evaluations Classparticipation


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s e!eryone able to lo% nto blac boarn -.a l 0 ll be sent out 0hen u$&ates arecarr e& out'

nterest n% art cles "or & scuss on 0 ll be$oste& n blac boar&'Stu&ents 0 ll be $ro.$te& on 0hat to rea&$r or to class "or & scuss on'

6/11/2009 3

Blackboard


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he en% nes n 0h ch co.bust on o" "uel ta es$lace ns &e the en% ne are calle& as nternalco.bust on en% nes or * en% nes ' he * en% nesco.$r ses o" the $ ston an& cyl n&er arran%e.ent

0 th suct on an& exhaust !al!es'" the heat s a&&e& to an en% ne "ro. an external

source then t 0oul& be an external co.bust onen% ne

+ !e an exa.$le o" each

6/11/2009 4

Internal CombustionEngine
http://www.brighthub.com/engineering/mechanical/articles/1459.aspxhttp://www.brighthub.com/engineering/mechanical/articles/1459.aspx


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*yclese8n t ons

-!ents

*on8%urat on o" en% neFuel ty$e#$$l cat onS$ee&S$ec alty en% nes

6/11/2009 5

Review of internal combustionengine components


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6/11/2009 6

Bore diameter of cylindertroke ! two times crank t"row


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#e$nitionsTop #ead Center (T#C)Bottom #ead Center (B#C


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s$lace.ent s not the total !olu.e o" thecyl n&er t s the !olu.e o" the area& s$lace& by the .o! n% $ ston' heclearance !olu.e at the to$ o" the cyl n&erta es u$ the re.a n n% !olu.e ns &e theco.bust on cha.ber'

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#isplacement or swept volume % piston area &stroke

piston area % (pi' ) bore s uared


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Ho0 0oul& you .easure clearance !olu.e9hat about $orte& en% nes Ho0 &o you

.easure & s$lace.ent

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Compression ratio (r c )% * + '* , % volume at B#C over volume atT#CClearance volume % volume at T#C


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1:; &e%ree rotat on o" cran sha"t "ro. * to < * or < * to * "or a % !encyl n&er (also e3ual to t0 ce cran thro0)

9hat s a =s3uare> en% ne9hy can lar%e slo0 s$ee& en% nes ha!esuch lon% stro es

6/11/2009 10

troke


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2 cycle one $o0er stro e $er re!olut on(one re!olut on ? t0o stro es) hence 2stro e en% ne4 cycle one $o0er stro e "or 2 re!olut ons

(2 re!olut ons ? 4 stro es) a a 4 stro een% ne9hat &oes the ca.sha"t &o n an en% ne

9hat s the ca.sha"t s$ee& o" a 2 stro een% ne 4 stro e en% ne

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Cycle for #iesel Engines


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nta e co.$ress on $o0er exhaust ( na 2 stro e cycle "our e!ents ta e $lace nt0o stro es)'

n a 4 stro e en% ne the e!ents ta e $lacen 4 stro es

@uest onA 0hat ee$s the en% ne rotat n%0hen not on a $o0er stro e

9hy are en% nes .a&e n a Bcon8%urat on

6/11/2009 12

Event


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S$ar or co.$ress on %n t on (Otto esel) 0o or "our stro e cycle*on8%urat on n l ne Bee O$$ose& P ston

S$ee& A DP A slo0 .e& u. h %h s$ee&

PS E ean P ston S$ee& ("t . n) ? 2 xstro e ("eet) x DP

S$ee& Factor ? DP x PS 1;; ;;; ? 2 x stro e x DP 2 1;; ;;;

6/11/2010 13

Classi$cation


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DPPS

("t . n)S$ee&Factor

Slo0 S$ee& G ;;12;;E16;; 1 to

e& u.S$ee&

;;E1;;;

16;;E2;;; to I

H %h S$ee& J1;;;2;;;E24;; I to 27

Su$er H %hS$ee& 27 to :1

Ho0 s $ ston s$ee& relate& to en% ne s$eell th n%s be n% e3ual 0oul& an en% ne 0 th alon%er or shorter stro e %enerate .ore tor3ue

6/11/2010 14


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P ston ty$e trun or crosshea&

Fuel nject on syste. (a r obsoletesol & .echan cal electron c (co..on ra l))*o.bust on # rA Katurally as$ rate&

turbochar%e& blo0n

2 stro e exhaust E loo$ or un Co0 sca!en%e&Fuel burne& HFO( :;) FO(1:;) O +OP ston act on E s n%le or &ouble act n%

s$lace.ent stro e bore rat o 2 stro e slo0 s$ee&s A short stro e a$$rox 2'5 2':lon% stro e L '2 '4su$er lon% stro e 4'; E 4'2

6/11/201015

Classi$cation


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9hy are slo0 s$ee& en% nes also crosshea& ty$e9hat en% ne syste. s .ost eMecte& by en% ne&es %n trun !s crosshea&'9h ch "uel has the .ost ener%yHFO FO O +O9h ch "uel s eas est to burn9hat a&& t onal cool n% syste. &o slo0 s$ee&en% nes usually ha!eHo0 s the lube o l syste. eMecte& by en% ne&es %n slo0 s$ee& crosshea& !s .e&' S$ee&trun ty$e

6/20/1016

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1.classification & isdfntro 2010

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