eec egr scheme

[Peter Jaramaz]

Hi All,

I was under the impression that a lean mixture burns quicker (and hotter) 
than a relatively richer mixture.

Doesn't the the EGR value release exhaust gases into the combustion process 
hence relatively richening the mixture i.e exhaust gases displace clean 
air?

Rgs,

Peter

----------
From: 	James Weiler
Sent: 	Monday, June 08, 1998 3:14 PM
To: 	diy_efi at efi332.eng.ohio-state.edu
Cc: 	diy_efi at esl.eng.ohio-state.edu
Subject: 	Re: eec egr scheme

Uhmmmm john.  I don't know about fuel delivery but the main difference is
ignition timing.  When the ECU opens the EGR valve (and the EGR valve
position sensor confirms this) then ECU also advances the timing.  This
is to make up for the leaner mixture because lean mixtures burn slower
thus the advance timing.  The ECU does not lean things out at all.


begin 600 WINMAIL.DAT
M>)\^(A %`0:0" `$```````!``$``0>0!@`(````Y 0```````#H``$(@ <`
M& ```$E032Y-:6-R;W-O9G0 at 36%I;"Y.;W1E`#$(`0V ! `"`````@`"``$$
MD 8`8 $```$````,`````P``, (````+``\.``````(!_P\!````80``````
M``"!*Q^DOJ,0&9UN`-T!#U0"`````&1I>5]E9FE 969I,S,R+F5N9RYO:&EO
M+7-T871E+F5D=0!33510`&1I>5]E9FE 969I,S,R+F5N9RYO:&EO+7-T871E
M+F5D=0`````>``(P`0````4```!33510`````!X``S !````(@```&1I>5]E
M9FE 969I,S,R+F5N9RYO:&EO+7-T871E+F5D=0````,`%0P!`````P#^#P8`
M```>``$P`0```"0````G9&EY7V5F:4!E9FDS,S(N96YG+F]H:6\M<W1A=&4N
M961U)P`"`0LP`0```"<```!33510.D1)65]%1DE 149),S,R+D5.1RY/2$E/
M+5-4051%+D5$50```P``.0`````+`$ Z`0````(!]@\!````! ````````*<
M2 $$@ $`$P```%)%.B!E96, at 96=R('-C:&5M90`1!@$%@ ,`#@```,X'!@`)
M``\`-@`.``(`.0$!(( #``X```#.!P8`"0`/`#,`+P`"`%<!`0F `0`A````
M,35"-#@T,T)!149&1#$Q,4)%0D,P,#0P,#4U1C)!-D8`10<!`Y &`, $```4
M````"P`C```````#`"8```````L`*0```````P`N```````#`#8``````$ `
M.0!@\T (:Y.]`1X`< `!````$P```%)%.B!E96, at 96=R('-C:&5M90```@%Q
M``$````6`````;V3:P at W.X2T%O^N$=&^O ! !5\J;P``'@`># $````%````
M4TU44 `````>`!\,`0```!D```!P:F%R86UA>D!I;F=E;FEC;RYC;VTN874`
M`````P`&$.4S`Q<#``<0C (``!X`"! !````90```$A)04Q,+$E705-53D1%
M4E1(14E-4%)%4U-)3TY42$%404Q%04Y-25A455)%0E523E-154E#2T52*$%.
M1$A/5%1%4BE42$%.05)%3$%4259%3%E224-(15)-25A455)%1$]%4TX`````
M`@$)$ $````S`P``+P,``!0&``!,6D9U)\GN,?\`"@$/`A4"I /D!>L"@P!0
M$P-4`@!C: K <V5T[C(&``;#`H,R`\8'$P*#QC,#Q0(`<')Q$B 3B/HT$PU]
M"H (SPG9`H *@8,-L0M@;F<Q,#,4($<+"A0B`= @2&D3<&P,;"P*A0J%22!W
M80D$('5N!($@=&AE?B '<!3 !Y `D (@'.%A(05 82!L90.1;6EL>'0(<!T0
M8 at AP!C%Q4'5I8VL<P2@`<&38(&AO`D $D"D=T at .@1QXP%Y +8'1I=B%0>5\A
M,!^@'0`%P!ZE+AM<1')O!Y!N)P5 '/(<\D7P1U(@=@= "E A,AY at D1'P(&5X
M$<!U<P5 SF<EH00@"X!T;QSC!:#/!M F(1VB%,!O8QUQ($!_"? H,"$_`P`9
M0!SC'J9INBXESF0$``M1*+%C'E.)"W!R/QM<4F=S&TT>4!(`',$;7 KT;&DQ
MY#0T`M%I+3$##- Q`[D+63$V"J #8"" 8P5 OBTSIPJ',EL,,#,F1 at -ACCHT
MKC,F#((@2F$'@OQ790,0!) T3S5=!F ", LVCS>;30(@9&%Y+"<X4!R0'1 P
M.#V@,3E at .3@@,SHQ`"\P37,Y+S5=5&\[;S>;+!!YLE\-P&E 0U$9@#(K`-$9
M0"YO:!V at +28P'@";(L )@'4_'S5=0V-!/W-"3T-3<VQ#_T4/1A]3.'5B:C-A
M1T\WFU)EVTUP">!C)= )P" $\!T`/P> +Z\+*!6R# $S)E5H$FU3,2!J2B!N
M+B"-'"%D`B D$6MN;P?@]P&@"& %0&8*4 ,@#; PX/TAH'(AT!\@)"0`P N 
M+ &?#= $D"B3! `;MFEG`P#?)[,A@!Z at 2?%3T%<H at 21TX$-5(&]P"? $("2)
MSR&@'_1:?%#E<&\`D">S+Q'P`( %L06@;C%0<FW_6E($`""R66%9T@= 7; >
M(-YD)0`HH5I46+=47I%7I]]:42;P`, ?P!R <%40!;'_'/(>4B(X'Q %D"81
M8R0>EN\$(!\B4 `7('<O>!SP)B#_'.-?Q6"*6;14$ >15( %0/\>4UZ!&4 $
M(%3B'@(;("+=+QFO4FEK51:Q`&XP``,`$! ``````P`1$ $```! ``<PP._7
ML&J3O0% ``@PP._7L&J3O0$>`#T``0````4```!213H@``````,`#33]-P``
"I$Z3
`
end