Mastermind
Work Saw Specialist
Wes........did you read the post I was replying to?
The MS661 is for sale in the US again
- Thread starter Mastermind
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Read?! Ain't got no time fo dat!
Ron660
Addicted to ArboristSite
That's the other part I'd agree with how the Mtronics works (finding the leanest mix). I still think there's a temperature sensor to adjust for change in outside temperatures.....just like we'd have to adjust a manual carb for those changes.
Mastermind
Work Saw Specialist
Huskys AT system has a throttle position, and a temp sensor. These are both things I can check with their software.
I would like to think the MT system has the same.
I would like to think the MT system has the same.
Chris-PA
Where the Wild Things Are
It doesn't need to know the temperature, pressure or any of those things to compensate for them, just like you don't. It does pretty much exactly what you'd do when tuning - turn the screw a little to the lean side and "listen" to what the rpm does. And then set it back just to the rich side. Only it does that test over and over while the saw is running.
Chris-PA
Where the Wild Things Are
I'm betting it uses the temp sensor to adjust various control loop settings - it doesn't need it for the basic mixture feedback. I also wonder if it is air temp or engine temp - since I don't have one to look at!
What is this I put the arrow on? Non gasoline mixed air?
big t double
Addicted to ArboristSite
Compensator snorkel.
Mastermind
Work Saw Specialist
That connects the back of the metering diaphragm to the air filter. The idea is that as the air filter becomes more plugged, the air fuel mixture will be automatically adjusted to suit conditions.
Chris-PA
Where the Wild Things Are
My old McCinderblock achieves the same thing by placing the entire carb in a sealed box behind the air filter. I am kinda surprised that they still do that with AT/MT, although I guess it's one less thing the system has to compensate for.
one.man.band
ArboristSite Guru
magnet on/near the diaphragm?
Mastermind
Work Saw Specialist
No sir.
one.man.band
ArboristSite Guru
Mastermind
Work Saw Specialist
Niko, and a few others in the UK keep saying that Husky owns the AT tech. Have you found that to be true?
Chris-PA
Where the Wild Things Are
No idea first hand, although I have read the same. I thought I remembered some article about Husky being told they had to share something with Stihl, but I don't remember the details nor if it was strato or AT.
one.man.band
ArboristSite Guru
tps feedback system (by magnet or hall sensor) to coil.....been around in autos for a while. mid '80's - '90's can't remember?
those patents are expired/freegame by all now.
newest zama patents control actual fuel flow using the diaphragm, nothing like what seems to be happening here.
those patents are expired/freegame by all now.
newest zama patents control actual fuel flow using the diaphragm, nothing like what seems to be happening here.
That's been on Stihl saws for years. It's called Intellicarb.
one.man.band
ArboristSite Guru
checking into some auto sites, reveals that a tps system in an '83 toyota was run by a potentiometer, which adjusted the electrical resistance as the throttle butterfly moves. (simple 'volume' control on a stereo).
intermittent failure of tps symptoms include: poor idle; stumble.....
...in a toyota.......haha
intermittent failure of tps symptoms include: poor idle; stumble.....
...in a toyota.......haha
CR500
Diesel, Snowmobile, & Chainsaw Technician
I own a Yota T100 if that helps haha
Sent from my non internal combustion device.
Sent from my non internal combustion device.
Ron660
Addicted to ArboristSite
I wouldn't dispute that also. When you calibrate, for 90 seconds, it's adjusting the engines rpms for ambient conditions and/or fuel mix. So it's adjusting the "idle and L" settings during the calibration. The "H" setting is probably limited.
