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Discussion Starter #1
I have determined that the problem I was having with my regerative braking
may have had nothing to do with faulty circuiting, failed diodes or
snubbers, but everything to do with early SAAB's freewheeling transmissions.
The early SAAB's had transmissions that could be manually set to "freewheel"
or be engaged with the drivewheels. Freewheeling allowed the engine to
return to idle and coast if you took your foot off the accellerator. While
driving the 10 mile to Delhi, NY from my home in Bovia, I listend for the
whine of my Advaned DC motor while coasting and didn't hear it, looked down
at the position of the freewheel lever and wondered if it was engaged or
not. I had forgotten the correct possition the lever should be in for either
function. Before leaving the hardware store in Delhi, I pulled out the
freewheel lever and headed home. Decending the first hill in fourth gear, I
downshifted to third, engaged the regen circuit, depressed the accellerator
and was pleasantly relieved to feel the drag of the generator slow the car
and post a posative 20 amps on the DOE Argone Lab volt/amp meter. The regen
system will not function in freewheel, and I,m not sure about automatic
transmissions.

Thanks to the few on EVDL who offered to trouble shoot my problem, get into
Gary Jackson's regen braking system design and electronics and help find a
solution. In the end it was the unique (quirky) SAAB engineering and
forgetful 35 year SAAB enthusiast, not the electronics, that was the cause.
Gary Jackson's regen braking works fine for those of you who may be
interested.

Thanks, Christen


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View this message in context: http://www.nabble.com/Regen-Braking-tf4674905s25542.html#a13356624
Sent from the Electric Vehicle Discussion List mailing list archive at Nabble.com.

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Registered
Joined
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70 Posts
Discussion Starter #2
I live in delhi and would love a chance to see your car in person

> Date: Mon, 22 Oct 2007 19:59:41 -0700
> From: [email protected]
> To: [email protected]
> Subject: [EVDL] Re gen Braking
> =

> =

> I have determined that the problem I was having with my regerative braking
> may have had nothing to do with faulty circuiting, failed diodes or
> snubbers, but everything to do with early SAAB's freewheeling transmissio=
ns.
> The early SAAB's had transmissions that could be manually set to "freewhe=
el"
> or be engaged with the drivewheels. Freewheeling allowed the engine to
> return to idle and coast if you took your foot off the accellerator. While
> driving the 10 mile to Delhi, NY from my home in Bovia, I listend for the
> whine of my Advaned DC motor while coasting and didn't hear it, looked do=
wn
> at the position of the freewheel lever and wondered if it was engaged or
> not. I had forgotten the correct possition the lever should be in for eit=
her
> function. Before leaving the hardware store in Delhi, I pulled out the
> freewheel lever and headed home. Decending the first hill in fourth gear,=
I
> downshifted to third, engaged the regen circuit, depressed the accellerat=
or
> and was pleasantly relieved to feel the drag of the generator slow the car
> and post a posative 20 amps on the DOE Argone Lab volt/amp meter. The reg=
en
> system will not function in freewheel, and I,m not sure about automatic
> transmissions.
> =

> Thanks to the few on EVDL who offered to trouble shoot my problem, get in=
to
> Gary Jackson's regen braking system design and electronics and help find=
a
> solution. In the end it was the unique (quirky) SAAB engineering and
> forgetful 35 year SAAB enthusiast, not the electronics, that was the caus=
e. =

> Gary Jackson's regen braking works fine for those of you who may be
> interested.
> =

> Thanks, Christen
> =

> =

> -- =

> View this message in context: http://www.nabble.com/Regen-Braking-tf46749=
05s25542.html#a13356624
> Sent from the Electric Vehicle Discussion List mailing list archive at Na=
bble.com.
> =

> _______________________________________________
> For subscription options, see
> http://lists.sjsu.edu/mailman/listinfo/ev

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