AWD Magnetic Coupler Operation
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- Опубліковано 25 сер 2024
- Please read the entire description...A look at the heart of an AWD system! Apologies for using both terms “pilot” and “control”, for the purposes of this video they are interchangeable. Relative rotation of the control (pilot) cam acting on the main through the balls provides main clutch pack clamping. Rotation is initiated when the coil is energized producing a magnetic field drawing in the armature, clamping the control (pilot) disks...Greater the magnetic field strength (a function to the duty cycle of the control signal applied) the greater the pull on the armature. Translating into more or less drive coupling as a function of clutch pack compression force.
It's almost simple and complex both at the same time, clever stuff though. Thanks Ian
Well put Matt. Just a couple of wedges being put to good use! Cheers Pal
😁😁 Ian mate you are an sx4 encyclopedia.... 😃
Johnny's Speed Shop Haha...far too kind. Too bad they are going extinct! Cheers Pal
Very Good Info And Explanation
Thank you very much indeed. You have been one of the very few to think so 🤣...Cheers
I have a problem with rear wheel traction in my 2007 sx4 2.0, the auto and lock light work correctly on the instrument panel, the AWD module sends a signal to the coupling and the resistance of said coupling marks 3ohm just as the manual says. Raise the tires of the vehicle and when you release the clutch pedal in the lock position, you can hear the coupling part thunder, but the sound immediately disappears. The tires all rotate when suspended, in any position of the AWD switch. Only when on the road only the front ones work. Could it be a malfunction of the magnetic coupling?
I doubt it. That sounds like normal operation. In AWD some drive is always sent to the rears on initial movement, then the drive is only coupled to the rear if front wheel slip is sensed. Lock mode will split drive 50/50 front rear, but will drop out (around 40kph). Read the owner handbook.
@@TheGibby3340I appreciate your prompt response
See initial response edit. Thx for watching 🍻
Interesting as always, enjoy your diction
Hi Dave. I am not all together happy with this piece. Think the grinding detail may well be too much for most. Difficult to make this stuff entertaining. Think I will go out and scope the control signal O/P at the controller under different modes and surfaces. Might be fun...Cheers Pal
Awesome - I had the exact same question - how can that tiny cable switch a chunky clutch pack.
It’s a very clever design. Thx for watching 🍻
Nice video
Thank you Sir 👍
Do you have any info about electricity specs? volts and amperage etc. I have a toyota with a viscous coupler but that's not that good. AWD is not engaged on demand, in wintertime it's always engaged because of freezing (one of the coldest cities on earth). After the big bearing was dead, i swapped the differential with an electromagnetic one. My idea was just to engage the coupler 100% when i need. Simple hardwiring to the battery with relay and button. Will it work? At the moment the propeller shaft is removed. in next weekend i will wire it and test. Before that i wanna gather as much info as possible. googling but nothing about such mod.
This is the extent of my knowledge of the system…ua-cam.com/video/zuxnsJDni34/v-deo.html
I have a 2011 AWD Toyota Sienna, and there is a bearing in the electro mag coupler that is failing. My question is can I just take off my rear propellor shaft basically deleting the drive to the rear diff and coupler and just drive in front wheel drive like normal siennas? The rear only engages when it needs to, so I’m guessing the front differential is built strong enough to handle the weight alone? I’m not sure and all my research has been mixed answers and obviously Toyota won’t tell me anything. I really can’t afford the 1200$ coupler to fix it the right way.
I am sorry, to be honest I don’t know. I have pondered the same question myself. 2WD gearboxes are minus the transfer assembly of course. If that is left completely unloaded I am uncertain of any unintended consequences. If any…Perhaps a low mileage used assembly might be reasonable money?Thx for watching. Good luck.
My temp sensor on my 2012 does not stick out of the top like the diagram. Its buried in the diff. Is that normal for the later years?
Sorry IDK…My experience is limited to pre 2010 models. Thx for watching 🍻