Page 8 of 9

Re: Regen and brake lights

Posted: Fri Jun 04, 2010 6:32 am
by EVDRIVER
LTLFTcomposite wrote:
EVDRIVER wrote:I would venture that Toyota has more expertise here, in many areas.
And perhaps a bunch of patents?

Yes, I wish they would use them to build so EVs soon.

Re: Regen and brake lights

Posted: Fri Jun 04, 2010 8:21 am
by evnow
LTLFTcomposite wrote:
EVDRIVER wrote:I would venture that Toyota has more expertise here, in many areas.
And perhaps a bunch of patents?
Do the auto majors have cross-patent agreements ? Players in many major industries do - so that they don't spend time fighting each other in courts. That also keeps new comers from ever competing effectively.

Re: Regen and brake lights

Posted: Fri Jun 04, 2010 8:39 am
by LEAFer
I'm pretty sure that Nissan has licensed Toyota's Prius Hybrid Synergy Drive system and is using it in the Nissan Altima Hybrid (you're kind of driving a Toyota Prius!). And Toyota has licensed Nissan's CVT (not sure if the Prius uses that one).

Re: Regen and brake lights

Posted: Fri Jun 04, 2010 9:31 am
by efusco
LEAFer wrote:And Toyota has licensed Nissan's CVT (not sure if the Prius uses that one).
The Prius does not have a CVT in any conventional sense of the term. It has a patent on the planetary gear system used in the transaxle (though not w/o dispute).

Re: Regen and brake lights

Posted: Sat Jun 05, 2010 10:39 pm
by evnow
Don't know whether this was quoted earlier.

http://www.easyecar.com/electric-vehicl ... rst-drive/
It has a 80 kW motor that gives a VERY powerful acceleration. The regeneration I only very little when you take the foot of the accelerator and it goes to maximum when you apply the brake.

Re: Regen and brake lights

Posted: Thu Jun 10, 2010 11:10 am
by johnr
I asked Nissan about this - and they're not talking, yet. So at this point it's just speculation.
John wrote:Does the regenerative braking increase proportionately depending on how much pressure is applied to the brake pedal?
Nissan wrote:Dear John,

Thank you for taking the time to personally contact us about your interest in the Nissan LEAF.

Details about regenerative braking are not released at this time. When more details are available we will update on the website http://www.NissanUSA.com.

We appreciate your time, and encourage you to share our contact details with friends and family. For your convenience, we can be reached:

By return email, through our website at http://www.nissanusa.com, or by phone at 877-664-2738.

We’re here to serve you from 7:00 a.m. to 7:00 p.m. (CST) Monday through Friday and 8:00 a.m. to 4:30 p.m. (CST) on Saturday

Sincerely,

Nissan Electric Vehicle Customer Support

***This email message is provided in response to your recent inquiry to Leaf Customer support so should not be considered unsolicited commercial email.

Re: Regen and brake lights

Posted: Fri Jun 11, 2010 12:01 am
by garygid
For me, no variable Regen on the brake pedal ... means "no sale".

Re: Regen and brake lights

Posted: Fri Jun 11, 2010 3:14 am
by LTLFTcomposite
garygid wrote:For me, no variable Regen on the brake pedal ... means "no sale".
In that case will you be replying back to Nissan with another "Dear John" letter? :lol:

Notice that in that letter only one substitution is required:

Details about what you asked about are not released at this time.

Re: Regen and brake lights

Posted: Fri Jul 09, 2010 1:52 pm
by bruceha2000
daniel wrote: The only thing the Prius does wrong is putting a small amount of regen on the accelerator pedal to mimick an automatic. This results in making it very difficult to coast when you want to, since you have to find exactly the right pedal position. Separating the functions means you can go faster when you want to, go slower when you want to, and coast when you want to. With hard braking (regen) on the accelerator pedal, coasting is very difficult.
Much as I respect you and your opinions Daniel, I have to disagree. I LIKE the 'dead band' glide in the Prius, I just wish it was easier to find and hold. I use it all the time as I'm sure many other Prius owners do as well. If someone ahead starts to slow, I don't want to have to take my foot off the accelerator and move it to the brake for light 'slow down'. When traffic allows me to leave reasonable gaps, I don't touch the brake pedal until I need to physically stop the car at a light or stop sign. So I *want* a '3 position' accelerator pedal
  • foot off = Light regen
  • light pressure = glide
  • more pressure = regular acceleration
Just make the 'glide' range about 1/2" 'deep'

Re: Regen and brake lights

Posted: Fri Jul 09, 2010 2:13 pm
by bruceha2000
planet4ever wrote:Using minus energy is a lot better than no energy.
Not necessarily. Using NO energy means you aren't losing kinetic energy that you have paid for. Using 'minus' regen means losses going into and out of the battery. The best possible is maintaining speed or slowing very gradually due to rolling resistance AND using NO energy. 'Glide' a quarter mile to the red light rather than using fuel to travel 1/8th mile then regen to slow the next 1/8th. You will never recover as much energy regening the last half as you used to travel the first half (presumig no significant downhill slope of course).