Volumetric Efficiency
Road Master
Joined: Mar 2007
Posts: 1,177
Likes: 23
RE: Volumetric Efficiency
I think we are now back to the basic math is
A constent developed from the injector size and engine displacement)
X
(AFV) ... this is a slowly moving +/- 10% correction that can't be seen or reset with old SERT software
X
(Adaptive Fuel Tables VE Lookup) ... a multi celled table (of unknown size of \\;X by Y and tied to either MAP or TPS and RPM) \\;developed on what the ECU learns from the O2 in closed loop and may cleared on reflash. \\;The ECU will all attempt to average these to 100 once the AFV homes in. These also can't be seen or with the old SERT software
X
(Main fuel tables VE Lookup) ... Based on the main VE table.
X
(MAP reading in KPA/100) ... Apparently is is there looking at the VE values and that the system is claimed to be a speed density system. The VE table is Alpha-N presentation. Note that \\;the AFR targets and the timing tables are MAP based.
X
(Warmup fuel correction)
X
(The desired AFR)... \\;This is verified when in closed loop.
X
 \\;
(Intake Air Temp \\;correction)
 \\;
 \\;
Remember that each and every term has to be understood before you start \\;messing with any other term. Is there anything else \\;you need to understand before taking on a \\;basic \\;bike tune?
AW
A constent developed from the injector size and engine displacement)
X
(AFV) ... this is a slowly moving +/- 10% correction that can't be seen or reset with old SERT software
X
(Adaptive Fuel Tables VE Lookup) ... a multi celled table (of unknown size of \\;X by Y and tied to either MAP or TPS and RPM) \\;developed on what the ECU learns from the O2 in closed loop and may cleared on reflash. \\;The ECU will all attempt to average these to 100 once the AFV homes in. These also can't be seen or with the old SERT software
X
(Main fuel tables VE Lookup) ... Based on the main VE table.
X
(MAP reading in KPA/100) ... Apparently is is there looking at the VE values and that the system is claimed to be a speed density system. The VE table is Alpha-N presentation. Note that \\;the AFR targets and the timing tables are MAP based.
X
(Warmup fuel correction)
X
(The desired AFR)... \\;This is verified when in closed loop.
X
 \\;
(Intake Air Temp \\;correction)
 \\;
 \\;
Remember that each and every term has to be understood before you start \\;messing with any other term. Is there anything else \\;you need to understand before taking on a \\;basic \\;bike tune?
AW
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