Twin Tuner Instruction
Inviato: 01/12/2009, 20:30
In attesa che arrivi la suddetta centralina ordinata dal Web Master ho iniziato a dare un occhiata alle istruzioni.
Tutto chiaro, tranne i 5 punti che riguardano i motori che montano gli 02 oxygen sensor (quelli di serie).
Non è che la mia conoscenza dell' inglese sia eccellente, ma nemmeno scarsa, semplicemente la mia incomprenzione, penso sia dovuta più alle lacune che ho riguardo al sistema EFI, per me questo quasi sconosciuto.
Riporto fedelmente quanto scritto a pag. 9 delle istruzioni, in attesa che qualcuno di buona volontà, e non solo mi chiarisca il tutto. Grazie in anticipo.
Page 9:
MODELS WITH ORIGINAL
EQUIPMENT OXYGEN SENSORS
2006 fuel injected Dyna and all 2007-2010
models are equipped with dual narrow-band oxygen
sensors and a Delphi® ECM that supports closed loop
AFR control based on feedback from the sensors. A
similar system is used on Buell models. After the
engine has warmed up, the ECM attempts to maintain
the AFR at 14.6 during idle and part throttle cruise.
Several factors must be considered when modifying
engines equipped with this system:
1. The engine components are designed to operate
properly at idle and part throttle cruise with this
relatively lean 14.6 AFR. Some camshaft profiles
and aftermarket heads or head modifications may
result in excessive lean surge or stalling at idle.
2. If installation of an aftermarket exhaust is planned,
it must have provision for the oxygen sensors.
3. At idle and part throttle, the ECM can automatically
correct for modifications by changing the baseline
fuel up to ±25%. You can use a scan tool such as
our Twin Scan II to check what correction the ECM
is making under closed loop conditions (original
equipment narrow-band sensors must be
installed). The correction is referred to as the error
integrator value and will range from 75-125%. If the
ECM is running out of adjustment range, you may
be able to use the Twin Tuner to trim the baseline
fuel delivery in order to bring the error integrator
value back to near 100%. However, you will not be
able to change the target AFR value. This will
always remain at 14.6.
4. You can use the Twin Tuner to make corrections at
wide open throttle (parameters 4-8). If you have
the Twin Scan II+, you can use it (with WEGO
sensors temporarily installed) to calculate required
corrections above 40% TPS on the fuel trim tables.
5. When using the Twin Scan II+, temporarily
installing the WEGO sensors in place of the
original equipment narrow-band sensors
(disconnect sensors) will cause the Delphi® ECM
to remain in open loop without any fuel corrections
that would affect the tuning process. After tuning is
completed, reinstall the original equipment sensors
and clear any trouble codes.
Tutto chiaro, tranne i 5 punti che riguardano i motori che montano gli 02 oxygen sensor (quelli di serie).
Non è che la mia conoscenza dell' inglese sia eccellente, ma nemmeno scarsa, semplicemente la mia incomprenzione, penso sia dovuta più alle lacune che ho riguardo al sistema EFI, per me questo quasi sconosciuto.
Riporto fedelmente quanto scritto a pag. 9 delle istruzioni, in attesa che qualcuno di buona volontà, e non solo mi chiarisca il tutto. Grazie in anticipo.
Page 9:
MODELS WITH ORIGINAL
EQUIPMENT OXYGEN SENSORS
2006 fuel injected Dyna and all 2007-2010
models are equipped with dual narrow-band oxygen
sensors and a Delphi® ECM that supports closed loop
AFR control based on feedback from the sensors. A
similar system is used on Buell models. After the
engine has warmed up, the ECM attempts to maintain
the AFR at 14.6 during idle and part throttle cruise.
Several factors must be considered when modifying
engines equipped with this system:
1. The engine components are designed to operate
properly at idle and part throttle cruise with this
relatively lean 14.6 AFR. Some camshaft profiles
and aftermarket heads or head modifications may
result in excessive lean surge or stalling at idle.
2. If installation of an aftermarket exhaust is planned,
it must have provision for the oxygen sensors.
3. At idle and part throttle, the ECM can automatically
correct for modifications by changing the baseline
fuel up to ±25%. You can use a scan tool such as
our Twin Scan II to check what correction the ECM
is making under closed loop conditions (original
equipment narrow-band sensors must be
installed). The correction is referred to as the error
integrator value and will range from 75-125%. If the
ECM is running out of adjustment range, you may
be able to use the Twin Tuner to trim the baseline
fuel delivery in order to bring the error integrator
value back to near 100%. However, you will not be
able to change the target AFR value. This will
always remain at 14.6.
4. You can use the Twin Tuner to make corrections at
wide open throttle (parameters 4-8). If you have
the Twin Scan II+, you can use it (with WEGO
sensors temporarily installed) to calculate required
corrections above 40% TPS on the fuel trim tables.
5. When using the Twin Scan II+, temporarily
installing the WEGO sensors in place of the
original equipment narrow-band sensors
(disconnect sensors) will cause the Delphi® ECM
to remain in open loop without any fuel corrections
that would affect the tuning process. After tuning is
completed, reinstall the original equipment sensors
and clear any trouble codes.