AEM Infinity Quick Start Guide NA

							Tunin g G uid e
48
© 2 015 A EM  P erfo rm ance E le ctr o nic s
N ote  th at 1 4.6 4:1  is  c alle d th e s to ic hio m etric  A FR  fo r g asolin e. It  is  th e ra tio  w here  a ll  a va ila ble  fu el  is  b urn ed
c om ple te ly . F or m ost p erfo rm ance a pplic atio ns, it  is  n ot th e id eal  A FR  to  o pera te  th e e ngin e a t a ll  th e tim e n or is  it
t h e A FR  th at c re ate s th e m ost p ow er o r e ve n e conom y u nder a ll  c ondit io ns.
W hen th e fu el  s yste m  is  o pen lo op, th e O 2 s ensor is  ig nore d a nd th e in je cto r p uls e w id th  re lie s o n th e V E T able
a nd fu el  c om pensato rs  to  a dju st in je ctio n d ura tio n. O pen lo op is  n ecessary  d urin g e ngin e s ta rts , w hen th e O 2
s ensor h as c oole d b elo w  it s  o pera tin g te m pera tu re . It  m ay a ls o b e n ecessary  w hen c oola nt te m pera tu re s a re  lo w .
I n  th is  s ta te , th e fu el  v a poriz atio n is  p oor a nd th e e ngin e w ill  re quir e  a  ric her m ix tu re  to  p ro perly  o pera te . W hen
u nder h eavy  lo ad, th e e ngin e ty pic ally  re quir e s a n a ir  fu el  ra tio  th at is  o ut o f  a  n arro w  b and o xygen s ensors
s ta ndard  ra nge a nd o pen lo op w ill  b e n ecessary . W hen th e a ccela ir flo w  fu nctio n is  trig gere d d urin g h ard
a ccele ra tio ns, o pen lo op m ay b e n ecessary  to  h elp  s ta biliz e th e T arg et L am bda. A ls o, w hen th e d ecele ra tio n
f u nctio n c uts  fu el  c om ple te ly , ta rg et la m bda w ill  n ot b e n ecessary .
 
L am baTarg etT able
U nits : E ngin e L oad v s  E ngin e S peed v s  L am bda
D esc rip tio n: T his  ta ble  s ets  th e ta rg et la m bda fo r v a rio us e ngin e c ondit io ns.
T unin g T arg et L am bda 
T he fir s t s te p b efo re  tu nin g:
1 . Open In fin ity  T uner a nd c onnect to  th e E CU.
2 . Open th e L am bda T ab a nd c onfir m  th e L am bda1C al T able  is  s et u p fo r th e o xygen s ensor u sed.
3 . Open th e L am bda C ontr o l W iz a rd  a nd c heck th e L am bda 1  F eedback E nable  a nd/o r L am bda 
F eedback E nable  b oxes.
4 . Set th e L am bda F eedback M ax S peed. W id eband O 2 s ensors  a re  a ccura te  in  m ost s it u atio ns s o th is  c an
b e a ctiv a te d a ll  th e tim e, if  n eed b e.
5 . Set th e L am bda F eedback A fte r S ta rt D ela y (ty pic al  – 10 s econds).
T he In fin it y  T uner fu nctio ns a re  lo cate d in  th e T arg etL am bda ta b. 
1 . Use th e L am bda C ontr o l P ro portio nal G ain  b y it s elf  a nd s et th e L am bda C ontr o l In te gra l G ain  a nd
L am bda C ontr o l D eriv a tiv e  G ain  to  z ero . 
2 . Log th e c hannels  L am bda1 (o r 2 ) a nd E rro rL am bda1 (o r 2 ).  
						

							49
© 2 015 A EM  P erfo rm ance E le ctr o nic s
I
n fin ity  Q uic k S ta rt G uid e
3 . In cre ase th e L am bda C ontr o l P ro portio nal G ain  u ntil  th e p oin t o f  in sta bilit y  o r a  s usta in ed o scilla tio n is
r e ached. 
4 . Fro m  h ere , th e u lt im ate  p ro portio nal  (K u) is  fo und. 
5 . Fro m  th e lo g, m easure  th e p erio d o f  o scilla tio n fr o m  p eak to  p eak, in  s econds, to  o bta in  th e c rit ic al  tim e
c onsta nt o r u lt im ate  p erio d (P u). 
6 . Once th e v a lu es fo r K u a nd P u a re  o bta in ed, th e P ID  p ara m ete rs  c an b e c alc ula te d fr o m  th e fo llo w in g
e quatio ns. 
P ro portio nal,  In te gra l,  a nd D eriv a tiv e  F eedback 
L am bda C ontr o l P ro portio nal G ain  =  0 .6 0 (K u) 
L am bda C ontr o l In te gra l G ain  =  2  (K p) / P u
L am bda C ontr o l D eriv a tiv e  G ain  =  (K p)(P u) / 8
N ote  th at th ese v a lu es a re  n ot o ptim al  v a lu es a nd a ddit io nal  fin e tu nin g m ay b e re quir e d to  o bta in  th e b est ta rg et
l a m bda p erfo rm ance.  
						

							Tunin g G uid e
50
© 2 015 A EM  P erfo rm ance E le ctr o nic s
Wir in g H arn ess
Wir in g
T ools
A EM  re com mends u sin g th e fo llo w in g p ro per c rim p to ol  fo r a ll  In fin it y  E CU te rm in atio ns, M ole x P art N o: 6 3811-
4 200. T his  to ol  is  a va ila ble  in  m any p la ces. O ne is  s how n b elo w . W eb a ddre ss: h ttp ://w ww.n ew ark .c om
   
						

							51
© 2 015 A EM  P erfo rm ance E le ctr o nic s
I
n fin ity  Q uic k S ta rt G uid e
A  c heaper, b ut lo w er q ualit y , a lt e rn ativ e  is  th e fo llo w in g c rim p to ol,  M ole x P art N o: 6 3811-1 000. T his  to ol  is
a va ila ble  in  m any p la ces. O ne is  s how n b elo w . W eb a ddre ss: h ttp ://w ww.n ew ark .c om
  
Id le  A ir  C ontr o l V alv e  R equir e m ents
M any T oyota , M it s ubis hi,  a nd o th er v e hic le s u se a n Id le  A ir  C ontro l  V alv e  w it h  a  U nip ola r S te pper M oto r (6 -p in
c onnecto r) a nd M UST b e m odifie d. S ee p ic tu re  b elo w . A  B ip ola r S te pper M oto r (e .g ., G M ) w ill  h ave  a  4 -p in
c onnecto r a nd D O ES N O T n eed to  b e m odifie d. * T his  in fo  d oes n ot a pply  to  v e hic le s th at u tiliz e IA CV s ole noid s. 
						

							Wir in g H arn ess
52
© 2 015 A EM  P erfo rm ance E le ctr o nic s
  
T he 2  c ente r p in s (B la ck-R ed w ir e s) s upply  1 2V  p ow er to  th e s te pper m oto r in  th e fa cto ry  s etu p, h ow eve r th ese
p in s M UST B E D IS CO NNECTE D b efo re  p ow erin g o n th e A EM  In fin it y  E CU.
    
S te p 1 : D is connect c onnecto r fr o m  IA CV h ousin g a nd g ently  re m ove  th e re ta in er fr o m  th e c onnecto r.  
						

							53
© 2 015 A EM  P erfo rm ance E le ctr o nic s
I
n fin ity  Q uic k S ta rt G uid e
    
S te p 2 : U se a  s m all  fla t-b la de s cre w driv e r/p ic k to  m ove  th e te rm in al  lo cks w hile  p ullin g th e B la ck-R ed w ir e s o ut
f r o m  th e b acksid e o f  th e c onnecto r.
    
S te p 3 : U se h eat s hrin k to  in sula te  b oth  1 2V  w ir e s a nd th en z ip -tie  th e in sula te d w ir e s to  a  n earb y lo om . 
						

							Wir in g H arn ess
54
© 2 015 A EM  P erfo rm ance E le ctr o nic s
S te p 4 : R ein sta ll  th e re ta in er, a nd th en p lu g th e c onnecto r b ack in to  th e IA CV.