Radiator Fan - Pre 2014

[Jeriatric]

Wondering out loud.

How is the blade attached to the shaft? Press fit, or removable?

Is the motor design such that it would run either way based on polarity?

 

[MidLifeCrisis]

I like where you're going with this. opcorn:


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[Questions]

My bet is that you could make it run in either direction
It would take dpdt relay, but doesn't it push air out when running anyway?

like your car rad fan !!!! or better like the goldwing 1800cc fan 2 fan blowing air in front,,,only work when you top the bike or very slow speed,,,,like your car,,, or mine hi hi hi

 

[Chupaca]

Switched..!!

may be a problem..if you have the sensor that would reverse it at stops automatically and back when moving, that would be great. Otherwise if you forget you will be heating up your radiator..but where there is a will there has to be a way...!! :thumbup:

 

[Jeriatric]

My bet is that you could make it run in either direction
It would take dpdt relay, but doesn't it push air out when running anyway?

In its current configuration its a puller fan. Honestly have no idea if it runs often, or at all at speed (spyder above 20 or so MPH). If it does not, then making it a pusher would not require a relay change. Just flip the blade, and reverse motor polarity.

Am not saying anyone should do this.

Just mulling the pros and cons. For now?

Like the little tin man said......more input

 

[Bob Denman]

What we need; is a radiator fan motor, and a curious person with a 12 volt power source...
:bbq:opcorn::bbq:

 

[reverendg]

Flip the blade?

Why would you want to flip the blade? It could make a small efficiency difference IF the blade has camber or an airfoil to it, but that isn't likely. Even if it does, the difference would be minor. Just reverse the polarity and see how things go. Contrary to popular belief, putting the propeller on backwards does not change the direction of airflow.

 

[Jeriatric]

Why would you want to flip the blade? It could make a small efficiency difference IF the blade has camber or an airfoil to it, but that isn't likely. Even if it does, the difference would be minor. Just reverse the polarity and see how things go. Contrary to popular belief, putting the propeller on backwards does not change the direction of airflow.

Whatever works. :thumbup:
That's the fun part of 'thinking out loud' :chat: Ya get more input :doorag:

 

[Bob Denman]

I like where you're going with this. opcorn:

:agree: :thumbup: BRP is doing this with the 2014 system at very low speeds; perhaps if some information about how they're doing it can be found??? :dontknow:

It would be doubtful that all of the functionality can be duplicated... Manually reversing the flow would probably suffice.

 

[Jeriatric]

It's a dc motor so it will go backwards with the application of reverse current, but getting a reliable system that accomplishes that and is transparent to the ecm would take some wiring, another relay or someother electronica that both insulates the ecm from the scheme and provides the necessary backward electron flow.

Roger, If the fan motor will run bacwards, how would the ecm know the difference. What am I missing here?

Ok...think I get what you're saying. Wonder if a polarity reversing relay could be installed downstream from the existing relay, so as to trick the ecm?

 

[Jeriatric]

:agree: :thumbup: BRP is doing this with the 2014 system at very low speeds; perhaps if some information about how they're doing it can be found??? :dontknow:

It would be doubtful that all of the functionality can be duplicated... Manually reversing the flow would probably suffice.

Perhaps BRPCare Steve will mosey by this thread and ask someone in engineering. :bowdown:

 

[Jeriatric]

I'm not by my Paper Schematic and have to rely on the **** PDF one but I think the ecm supplies a ground to the relay, it closes and the fan kicks on.
The ecm doesn't care which way the motor is running but rather than fiddle with the signals on the ecm I would, if I were crazy enough to do this, intercept the signal at the motor and flip the polarity using a relay or some other device that would then flip the fed voltage to motor depending on the whim of the driver.

My gut feeling is that I doubt it would really accomplish much.
As a preliminary you might want to hang an LED on the leads across the motor and see if the fan actually runs much while driving around your beautiful desert.

Primary consideration here would be to reverse the fans air flow at slow speeds. Thus not cooking the right foot when crusing in town or while tortosing in stop and go traffic. Air flow at speed is'nt so much a concern.

 

[Dan McNally]

Primary consideration here would be to reverse the fans air flow at slow speeds. Thus not cooking the right foot when crusing in town or while tortosing in stop and go traffic. Air flow at speed is'nt so much a concern.

Exactly what is needed . . . and BRP is already doing just that with the 2014 . . . so, BRP . . . put an engineer (or a backyard mechanic) on this and sell us an upgrade for our 2013s that does this . . . moving down the road, the fan runs normally . . . slow or stopped, it reverses and pushes the hot air away from the rider's foot!

 

[Jeriatric]

The ecm would not be any the wiser with this

I don't have a specif relay in mind and this drawing isn't meant to be an actual wiring diagram for any one relay, a DPDT break before make would work.

Roger, is this an alternate relay or a proposed work around of the exsistng relay. If I were as smart as you....I would know :bowdown::roflblack:nojoke

Thanks for your INPUT!!

 

[Jeriatric]

Jer
ailment feeling particularly smart right now, I just popped something in my back while pulling out a tub surround in our bath ...

anyway, it is another relay mounted right by the fan.
The wiring harness is the existing wiring to the fan


excuse me while I lay back on the Barcalounger, turn on the heat & massage ......

OUCH!!!

Knew you had been nursing a back ailment...sorry buddynojoke

 

[Bob Denman]

Do have any of those wondrous pain meds left over from the last incident? :shocked:

 

[jerpinoy]

I need the fan to warm my rt foot while riding in the NW:roflblack::roflblack::roflblack:

 

[finless]

I think a retrofit kit from BRP could be easily made to do what the 2014's do with the fan.
My bet is they added another relay to reverse the fan. The computer then reads the wheel sensor and if your moving under X speed or stopped and the fan needs to come on, they simple turn on the proper relay.

So a retrofit would be a code update and the addition of another relay to run in reverse.
I doubt it's rocket since to do this except getting BRP to make the code update and a kit for adding the relay.

My .00002 cents.

Bob

 

[Jeriatric]

I think a retro fit kit from BRP could be easily made to do what the 2014's do with the fan.
My bet is they added another relay to reverse the fan. The computer then reads the wheel sensor and if your moving under X speed or stopped and the fan needs to come on, they simple turn on the proper relay.

So a retrofit would be a code update and the addition of another relay to run in reverse.
I doubt it's rocket since to do this except getting BRP to make the code update and a kit for adding the relay.

My .00002 cents.

Bob

Bob, your two cents are appreciated.nojoke

Now, If only, BRP would toss a nickle in :doorag:

 

[finless]

Your code writing experience and maybe a PAL development board

Seriosuly think about this. I bet we could tap into the rear wheel motion/speed sensor. Then we make a simple logic program in a PAL chip (with supporting electronics to control the relays). We double up on the relays and when the PAL chip gets the signal to turn on the relay from the spyder CPU, we look at the speed sensor and decide which relay to actually turn on!

Come'on guys.... I know we could do this ourselves and not mess with the spyders brains! It's a bypass

Bob