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Thread: Electric Defender

  1. #1
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    Electric Defender

    Just wonder if during this years there have been any news about the All Terrain electric Defender.
    Looks impressive in the video

    Article
    OpenECU at the heart of the Jaguar Land Rover Electric All Terrain Vehicle

    Video

    [ame="https://www.youtube.com/watch?v=i3RehLT6QfU"]2013 Land Rover Defender Electric Tested 4x4 SUV Commercial Carjam TV HD Car TV Show 2013 [/ame]
    Last edited by V8Ian; 14th November 2017 at 09:05 PM.

  2. #2
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    It was a mule,not a production vehicle. Pat

  3. #3
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    Can you use a PTO as a PTI to convert to an electric vehicle Defender

    This posting is about the option of using the PTO (Power take OFF) on the rear of the transfer box as a possible PTI (Power Take IN) with an electric motor to make an electric-hybrid. (This post is not intended as a post to debate different fuels or climate change!)

    I have a 1995 Defender 130 with a LT230T transfer box & 300tdi engine. It's served me well for over 400,000km as my primary work vehicle.

    I'd like people's opinion with regard to using such an arrangement, with the following major mod's:
    - The diesel engine clutch would need to be modified to be able to run it disengaged for a long time, safely
    - A seperate electric vacuum pump would be needed - for brakes
    - A seperate electric hydraulic pump would be needed for power steering
    - interlocks would be needed to switch from diesel engine to electric with all associated controls

    I appreciate many might ask "why bother", but that would defeat a good mechanical debate (perhaps!) about the merits of using the PTO in reverse.

    Some thoughts:
    - on dual rear-axle Defenders, the rear (additional) axle is often flipped upside-down so that the centre of the (offset) axle differential aligns with the PTO. A seperate drive (carden) shaft goes up and over the original rear-axle into the PTO. Under this arrangement, when going down a hill and using engine braking, power is being transferred into the PTO.
    - The 130 has plenty of capacity for extra weight. So, for my daily drive to work, i would benefit greatly from a battery bank that can get me only 30km before re-charge. I reckon this would cover more than 75% of my annual driving
    - Pulling out the diesel and making all electric is an option, but there goes any Simpson trip unless i carried a big generator!
    - Considered getting a TD5 bonnet and grill, allowing the 300tdi to be shifted forward relative to the gearbox, and installing a 'pancake' electric motor in a bellhousing extension. In diesel mode, the system would work as a normal diesel. In electric mode, the clutch would disengage the engine from the electric motor. This option seems excessive, for now.

    Discussion welcome

    Thank you

  4. #4
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    An electric motor in the PTO position running directly into the drive giving power off idle and when required combined with the Tdi,switchgear to turn it into a generator on over run charging a battery. Pat

  5. #5
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    My first thoughts/questions are...

    1) Are the PTO/I gears helical ergo, will reverse thrust cause premature failure?
    2) Are the PTO/I gears able to withstand the power and torque required to drive the car?
    If you don't like trucks, stop buying stuff.
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  6. #6
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    Quote Originally Posted by V8Ian View Post
    My first thoughts/questions are...

    1) Are the PTO/I gears helical ergo, will reverse thrust cause premature failure?
    2) Are the PTO/I gears able to withstand the power and torque required to drive the car?
    Thank you very much for the comments.
    As I understand, the splined gearbox mainshaft engages directly with the Mainshaft Input Gear inside the transfer case.
    I understand any PTO connection mates directly to the Mainshaft Input Gear inside the transfer case. Either side of this gear are two taper roller bearings facing opposite directions. I believe they are identical.
    I assume under normal engine-powering, one of the taper roller bearings would be loaded, and under engine braking, the axial load would reverse, loading the other taper roller bearing.
    Therefore, as I understand, driving this Mainshaft Input Gear inside the transfer case by an electric motor would result in a 'normal' loading on this gear and all downstream gearing (diffs etc).
    The only change - i believe - is that the gearbox would be driven in reverse, but without the engine to load it. Backlash / slapping in the gears may be an issue, but i've been a fan of Angel Gear for 20 years without any known detrimental effects.
    Keep the questions and arguments coming please.
    With thanks.

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