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by Skullbearer
Thu Apr 10, 2014 8:15 am
Forum: General / Main Owners Forum
Topic: Possible Regen Brake Issue
Replies: 19
Views: 10496

Re: Possible Regen Brake Issue

If the next dealer is unreceptive, message me the contact info of the service writer. You can let them know an Engineer was consulted and will call. Let's avoid it though if they will handle it appropriately. You can also use OnStar to get to Chevy Spark EV support, which can escalate it to Chevy En...
by Skullbearer
Thu Apr 10, 2014 8:12 am
Forum: General / Main Owners Forum
Topic: Possible Regen Brake Issue
Replies: 19
Views: 10496

Re: Possible Regen Brake Issue

I listened to the videos and compared to my own Spark. The clicking sounds like the system opening and closing the proportional valve or solenoid that allows direct pedal braking. The electrical noise may be the pump repressurizing the hydraulic accumulator, buy it doesn't sound like an arc to me (b...
by Skullbearer
Tue Apr 08, 2014 3:00 pm
Forum: General / Main Owners Forum
Topic: Possible Regen Brake Issue
Replies: 19
Views: 10496

Re: Possible Regen Brake Issue

Quick question to all. Could accelerating rapidly and then decelerating rapidly cause any of these modules/systems to overload and fail? Essentially the problems started when I had to accelerate very hard and then lift off quickly and apply considerable brake force. I was in L when all this happene...
by Skullbearer
Tue Apr 08, 2014 8:10 am
Forum: General / Main Owners Forum
Topic: Possible Regen Brake Issue
Replies: 19
Views: 10496

Re: Possible Regen Brake Issue

Definitely not a normal sound or feel, but it probably is related to the blended braking system. You can replicate the 'correct' sound of this change by using moderate regen braking at speed (say 45mph) and then shifting to N. The vehicle makes a very slightly clunky transition to 100% hydraulic bra...
by Skullbearer
Mon Apr 07, 2014 4:01 pm
Forum: Engineering and Features
Topic: Propane EV Heaters
Replies: 15
Views: 10622

Re: Propane EV Heaters

This technology doesn't need to be engineered from scratch, its existed for a long time. Off the shelf diesel-air heater: http://www.espar.com/fileadmin/data/countrysites/EB_Kanada/pdf/Airtronic_D2-D4-D5_Spec_sheet.pdf Including 100% biodiesel: http://www.eberspaecher.com/en/fuel-operated-heaters/pr...
by Skullbearer
Mon Apr 07, 2014 3:53 pm
Forum: Modifications & Accessories
Topic: Fast Charge Option Aftermarket Add-on
Replies: 6
Views: 6805

Re: Fast Charge Option Aftermarket Add-on

Why don't I put you to work on our JdeMO for the Toyota Rav4 EV. The hardware is easy. Cracking all the CAN bus messages is the challenge. If you can tap the CAN and log the raw messages during the charging sequence to see how many there are, we could build a strategy for experimental decoding. Unl...
by Skullbearer
Thu Apr 03, 2014 8:03 am
Forum: Engineering and Features
Topic: GM's next major EV investment
Replies: 11
Views: 9088

Re: GM's next major EV investment

For doing the "absolute" minimum, the Spark EV is damned good minimum. Much better than either what Toyota or Honda have to offer. I don't see why anyone should go with Tesla....it's not as if Tesla is handing things out. Not sure I'd agree about Toyota... The Rav4 EV is the "poor man's Tesla"s w/W...
by Skullbearer
Wed Apr 02, 2014 2:29 pm
Forum: Modifications & Accessories
Topic: Performance Boost!?
Replies: 40
Views: 27873

Re: Performance Boost!?

We have to be careful with speculation on the A123 cells, they don't publish all their options and have both 'energy' and 'power' cells. The cells that are commonly in this form factor pack are 'energy' cells and have a spec 10s peak discharge rate of only 10C, and a 30s of 5C. Given that the 105kW...
by Skullbearer
Wed Apr 02, 2014 2:00 pm
Forum: Modifications & Accessories
Topic: Fast Charge Option Aftermarket Add-on
Replies: 6
Views: 6805

Fast Charge Option Aftermarket Add-on

So a few of you may have noticed in the 6.6kW Effective Charging thread that I have been toying with building a 'cheap' home DC combo charger for somewhere between 6.6kw-12.2kW of 208/240V charging. The key issue that I need to address before I can do so, however, is adding the DC fast charge compon...
by Skullbearer
Tue Apr 01, 2014 8:07 am
Forum: Modifications & Accessories
Topic: Performance Boost!?
Replies: 40
Views: 27873

Re: Performance Boost!?

We have to be careful with speculation on the A123 cells, they don't publish all their options and have both 'energy' and 'power' cells. The cells that are commonly in this form factor pack are 'energy' cells and have a spec 10s peak discharge rate of only 10C, and a 30s of 5C. Saturation will defin...

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