1. AutoTuneTM

2. AutoTuneTM customer benefits
Maximum power
Always a top performing machine with minimum effort.
Ease of use
No time spent on manually setting the carburettor.

3. AutoTuneTM
AutoTuneTM provide maximum power throughout automatic engine setting. No time spent on manual carburettor adjustment. AutoTuneTM compensates for different fuels, altitude, humidity and ambient temperature.

4. AutoTuneTM
AutoTuneTM is an integrated microprocessor that governs and manages engine power.
AutoTuneTM compensates for:
+ Different fuel types
+ Altitude
+ Humidity
+ Ambient temperature
AutoTuneTM is activated when you
pull the starter handle.
AutoTuneTM is pre-programmed with default settings and need about 3-5 minutes in use to reach maximum engine power for the current conditions.
AutoTuneTM tunes the engine to start fast with stable idling and to perform at maximum power.

5. AutoTuneTM
All software updates is communicated through the support site:
PC-software available for dealers
Diagnostic tool manages:
engine error codes,
number of working hours
engine rpm history
temperature history
fuel setting history

6. AutoTuneTM , how does it work?
There are five active components in the AutoTune concept.
AutoTune module
AutoTune module:
A microprocessor that governs and manages engine performance.
Magnetic valve
Magnetic valve (integrated in the AutoTune module)
The amount of fuel provided to the carburettor is adjusted by the magnetic valve.
Temp sensor (integrated in the AutoTune module)
Provides info to the AutoTune module about ambient temperature
Temp sensor
Throttle sensor
Throttle sensor:
Provides info to the AutoTune module about throttle position.
Ignition module
Ignition module:
Controls ignition timing. Provides info to the AutoTune module about rpm. Provides electrical power to the AutoTune module.

7. AutoTuneTM , how does it work?
There are three main modes with specific targets in the AutoTune concept.
Starting mode
Quick and easy start
Target
Correct idling speed
Target
Idling mode
Maximum power
Target
Tuning mode

8. AutoTuneTM , how does it work?
Temp sensor
Ignition module
Throttle sensor
Magnetic valve
AutoTune module
Starting mode
Idling mode
Tuning mode
Condition: WOT, rpm
Condition: Throttle position idling
Condition: Start pull

9. AutoTuneTM , how does it work?
AutoTune module
Magnetic valve
Starting mode
Idling mode
Tuning mode 1 !
By pulling the starter handle, the AutoTune module is activated / powered. The AutoTune module instructs the magnetic valve to open. 1

10. AutoTuneTM , how does it work?
AutoTune module
Starting mode
Idling mode
Tuning mode 1
Idle !
The AutoTune instructs the ignition module about idling mode by the position of the throttle sensor.
Ignition module adjusts ignition timing for correct idling speed and instructs the AutoTune module about current rpm. The AutoTune module adjusts fuel supply. 2 1
Ignition module
AutoTune module
Ignition module ! 2
Magnetic valve !

11. AutoTuneTM , how does it work?
AutoTune module
Magnetic valve
Starting mode
Idling mode
Tuning mode ! 1
The AutoTune module instructs the magnetic valve to momentarily limit the fuel supply (minor lean out test).
Depending on rpm response from lean out test (step 1 + 2), the AutoTune module instructs the magnetic valve to gradually adjust fuel setting to reach maximum power.
This way the AutoTune module indirectly adjusts for fuel type, altitude, ambient temperature and humidity to reach maximum engine power. 3
After each lean out test the AutoTune module uses the rpm info from the ignition module. 1 2
AutoTune module 2
! rpm
Ignition module
AutoTune module
Magnetic valve ! 3

12. AutoTuneTM Q & A
Q1. Compared to a traditional machine, what are the benefits with AutoTune? Ease of use and that the engine always performs at maximum power.
Q2. Can I just start up my new AutoTune chainsaw and start working or does it require some time to tune in? Automatic 3-5 min under load
Q3. Are there no possibilities for manual adjustments at all? No there is no need for manual setting
Q4. What about fuel consumption, is it higher or lower compared to a traditional machines? Same fuel consumption.
Q5. How fast does AutoTune adjust to different fuels? In About 3-5 minutes under load.
Q7. What about idling – can I adjust that myself? No, this is automatically adjusted by AutoTune.
Q8. Will the AutoTune unit give recommendations on repair work that needs to be done? The diagnostic tool can show the technician which parts that needs to be exchanged in case of malfunction of the electronic parts.
Q9. Does my AutoTune chainsaw require specific service and maintenance? No, not more than what is mentioned in the OM.
Q10. Is it still an ordinary carburetor? Yes, but no carburettor needles.
Q11. Are there any restrictions on fuel ? No, there are no specific restrictions for AutoTune more than “normal” restrictions described in OM.
Q12. Is there any work situation where AutoTune is not recommended? No.
Q13. How often is a lean out test performed? Once / second.
Q14 Can I get more power out of my 550XP if I download AutoTune software for 560XP? No, the power is related to the engine size.

13. Footer: Document subject