jray3
Posts: 1658
Joined: Tue Dec 06, 2011 1:05 am
Location: Tacoma area, WA
Contact: Website

Re: Towing the "i"

Wed Mar 23, 2016 9:16 am

thank you iWatson for posting your RV dinghy experience. I've long thought that the i-MiEV would be perfect for this job with one addition- an interface allowing the car to do both full regen and full pushing for improving RV mpg and performance.
Of course that could be hacked by just putting the car in B mode and an actuator on the go pedal, and now that used i-MiEV are so cheap, the risk is minimized. I'd favor a spring-return pneumatic actuator for failsafe and fast operation with a simple single-tube setup. Since the i-MiEV has a vacuum pump, it could be a vacuum actuator for minimum added parts. I haven't found an appropriate air cylinder yet...

For a tow bar to pull the car on four wheels, the attachment brackets needn't be conspicuous, but if they don't stick through holes in the bumper and instead hang below, front clearance will be compromised. My 92 Civic with a Blue Ox towbar base plate often scraped on driveway transitions even at stock height.

With our tiny front overhang and relatively high clearance, a baseplate/front tow bar brackets shouldn't be too hard to fab up, but no major mfr would want to due to our tiny market.
2012 i-SE "MR BEAN" 105,400 miles
2000 Mazda Miata EV, 78 kW, 17 kWh
1983 Grumman Kurbwatt EV,170 kW, 32 kWh
1983 Mazda RX-7 EV 43 kW 10 kWh
1971 "Karmann Eclectric" EV 240 kW 19 kWh
1965 Karmann Ghia Cabriolet

mckemie
Posts: 17
Joined: Tue Jan 13, 2015 5:56 am

Re: Towing the "i"

Mon Apr 25, 2016 5:07 am

I just towed my second imiev home from a distant dealer. The first, mentioned above in the thread, was towed in about 30 mile segments for about 200 miles using a rope. For the second, I configured a tow bar of sorts. Some photos and commentary here:
https://plus.google.com/102434734002949 ... fc5j5XVFri
The tow bar was pin connected to the tow loop on the car with a 1" bolt. That is, a towed car driver is required since the geometry is not stable under tow car braking.

Briefly: about 30 miles of towing at about 45mph in "D" regens in about 50 miles worth of battery energy. 45mph and "D" were chosen to keep the regen power in the middle of the range.
2014 white imiev, bought December 2014
2014 black imiev, bought May 2016
2013 Tesla, delivered April 2013
early Leaf, sold after battery failed
various old conversions

iwatson
Posts: 119
Joined: Sat Jun 07, 2014 11:12 am
Location: Bartlett (Memphis), Tennessee

Re: Towing the "i"

Mon Apr 25, 2016 6:38 am

Nice looking car! Oh, BTW, The Tesla looks nice too :D
2012 Raspberry imiev SE Premium
2017 Cajun Red Chevrolet Bolt EV
2011 Viridian Joule Chevrolet Volt
2008 Cadillac SRX
2002 Forest River Sunseeker 3100
2001 Buick LeSabre
1997 Chrysler Town & Country

jray3
Posts: 1658
Joined: Tue Dec 06, 2011 1:05 am
Location: Tacoma area, WA
Contact: Website

Re: Towing the "i"

Mon Apr 25, 2016 4:13 pm

Willie, you're a wild one- I like that! Did you happen to run Canion and/or notice if the battery received or needed any air conditioning during that forced fast-charge? (Though D doesn't put near the load on the tow vehicle that B would.)
2012 i-SE "MR BEAN" 105,400 miles
2000 Mazda Miata EV, 78 kW, 17 kWh
1983 Grumman Kurbwatt EV,170 kW, 32 kWh
1983 Mazda RX-7 EV 43 kW 10 kWh
1971 "Karmann Eclectric" EV 240 kW 19 kWh
1965 Karmann Ghia Cabriolet

mckemie
Posts: 17
Joined: Tue Jan 13, 2015 5:56 am

Re: Towing the "i"

Mon Apr 25, 2016 4:30 pm

I wasn't "together" enough to attempt the bluetooth app thing. I haven't used it in quite a while, it's always seemed flaky. I do "somewhere" have an adapter that seemed to work.
2014 white imiev, bought December 2014
2014 black imiev, bought May 2016
2013 Tesla, delivered April 2013
early Leaf, sold after battery failed
various old conversions

mckemie
Posts: 17
Joined: Tue Jan 13, 2015 5:56 am

Re: Towing the "i"

Mon Apr 25, 2016 5:52 pm

jray3 wrote:Willie, you're a wild one- I like that!


Have I found an audience for my towing projects?
https://plus.google.com/102434734002949 ... DF23Eyrhpu
2014 white imiev, bought December 2014
2014 black imiev, bought May 2016
2013 Tesla, delivered April 2013
early Leaf, sold after battery failed
various old conversions

kiev
Posts: 996
Joined: Sun May 03, 2015 7:15 am
Location: The Heart o' Dixie
Contact: Website

Re: Towing the "i"

Mon Apr 25, 2016 7:16 pm

You have indeed--very impressive towing feats of strength, thanks for sharing
kiev = kenny's innovative electric vehicle

JoeS
Site Moderator
Posts: 3762
Joined: Thu Dec 15, 2011 5:47 am
Location: Silicon Valley, California

Re: Towing the "i"

Tue Apr 26, 2016 7:44 am

mckemie wrote:Have I found an audience for my towing projects?
https://plus.google.com/102434734002949 ... DF23Eyrhpu
Willie, you have indeed - from both an i-MiEV as well as Tesla workhorse perspective! Thank you for sharing.

You had attached your single towbar to the eye in the center of that forward crossmember. Two questions:

1) Had you considered adding a couple of eyes - one on each side - to allow a "V" towbar which might obviate the need for someone to be in the towed i-MiEV?

2) Did you have any issues with ground clearance or the bar coming up too high when the towing vehicle went over a bump?

I like what jray3 suggested and I just tried it with two cars in tandem: my bluetooth has sufficient range for CaniOn to stay connected while viewing the tablet from the towing vehicle (at 292fps - I had disabled a few CaniOn features).
EVs: 2 Wht/Blu SE Prem., '13 Tesla MS85, 3 156v CorbinSparrows (2 Li-ion), 24v EcoScoot(LiFePO4)
EV Conv: 156v '86 Ram PU, 144v '65 Saab 96
Hybrids: 48v1kW bike
ICE: '88 Isuzu Trooper. Mothballed: '67 Saab (orig.owner), '76 MBZ L206D RHD RV

mckemie
Posts: 17
Joined: Tue Jan 13, 2015 5:56 am

Re: Towing the "i"

Tue Apr 26, 2016 9:28 am

JoeS wrote:
1) Had you considered adding a couple of eyes - one on each side - to allow a "V" towbar which might obviate the need for someone to be in the towed i-MiEV?


Recall that I configured the tow bar to pick up a new car at a dealer about 150 miles from me. I didn't want anything that would require ANY car modification.

Yes, if I wanted to tow regularly, with one driver, a car in my possession, I would have developed some other solution.
2) Did you have any issues with ground clearance or the bar coming up too high when the towing vehicle went over a bump?


Not at all. I was somewhat surprised. One of the photos is of the hooked up pair of cars at a convenience store; to exit, we had a little dip from the parking lot on to the highway. No problem there. Incidentally, that was more than a "convenience store". It is a Kolache Mecca:
http://www.hruskas-bakery.com/
An intended and anticipated stop on the route.
Other than that kolache stop, the entire towing route was a major highway, SH71.

[/quote]
2014 white imiev, bought December 2014
2014 black imiev, bought May 2016
2013 Tesla, delivered April 2013
early Leaf, sold after battery failed
various old conversions

Palm35
Posts: 19
Joined: Fri Jun 20, 2014 5:49 am
Location: Rennes, France

Re: Towing the "i"

Wed Apr 27, 2016 2:50 am

In this topic Post subject: Re: Single LEV50-cell wanted for our Citroen C-Zero PostPosted: 25 Aug 2015, 20:06, Martin, (me68) wrote :
My wife towed me at home with the Golf - C-Zero was on at this Trip in gear selection D, right foot standby at the breakpedal. At a speed of round 50km/h this results in 11kW recuperation power - it was easy to handle.
My findings: a towline should stay in each EV - it's the universal charging equipment!
Martin

Return to “General Technical Discussions”