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The Third Pedal

Discussion in 'Australia & New Zealand' started by RIPPERTON, Jan 1, 2017.

  1. RIPPERTON

    RIPPERTON Member

    Joined:
    Aug 27, 2016
    Messages:
    38
    Location:
    Sydney
    How would you Tesla drivers like to have total dedicated control over your regen braking.
    ie a third pedal next to the brake pedal in the same place a clutch pedal would be.
    As impossible as this would be to actually install in a Model S we are only hypothesising about having the ability to control regen on command from zero to about 150kW. So the existing regen up to 50kW when the throttle is released is decommissioned and the car basically coasts or angel gears when the throttle is released.
    Then when the third or regen pedal is pushed, you can modulate it up to max as far as the traction control will allow.
    The regen pedal will feel exactly like a brake pedal with a short firm stroke. The dedicated regen system could also be built into the existing brake system leaving still only 2 pedals.
    Below is a shot of a dedicated regen pedal I built for my Barina conversion, was actually a 4th pedal as It had a 5 speed manual transmission with the clutch still in use. Its a motorcycle front brake lever with a pressure transducer screwed into it. The transducer converts hydraulic pressure (0-200psi) into an electrical signal (0-5v).
    My previous EV conversion, a Daihatsu Mira also had this system and it was used all the time and accounted for 27% of the cars range making it the worlds most efficient passenger electric vehicle conversion regularly clocking consumtion figures as low as 80Wh/km. A Mitsubishi I-Miev can do 116Wh/km and the SunSwift carbon fibre Solar racer could do 35Wh/km. So let us know what you think not that its going to change anything.

    [​IMG]
     
  2. RichardMcN

    RichardMcN Member

    Joined:
    Mar 12, 2016
    Messages:
    574
    Location:
    Sydney
    That would be great, or even a control that suppresses regen.

    When you are going all out for range, you will want to suppress regen (1) when stopping, and let the car coast to a stop, and (2) in hilly country to let the car pick up speed for the next hill. Kinetic energy, if used quickly is much more efficient storage than regen/battery/motor.

    The 2 current ways of doing this, neutral and controlling to 0kW are both tricky and annoying !
     
  3. eclectricdave

    eclectricdave Member

    Joined:
    Feb 24, 2016
    Messages:
    193
    Location:
    Malbourne Australia
    No one will risk their warranty by mods. In any case you can control regen by backing off go pedal to suit.
     
  4. joninmelbourne

    joninmelbourne Solid Black S60 new face

    Joined:
    Jun 29, 2016
    Messages:
    145
    Location:
    Melbourne
    The Outlander plug in hybrid has paddles under steering wheel to control regen. But most people just want to drive as normally as possible.
     
  5. woof

    woof Model X 75D Blue, 6 seats

    Joined:
    Apr 30, 2009
    Messages:
    1,228
    I've wanted this from day one with the first EV I ever drove, through today with the X. I'd accept a simple paddle "on/off" switch for regen so I can hold it "off" while canceling cruise control, or for coasting on the highway down hills. But a "clutch" for regen strength would be awesome. I made a thread about that somewhere...EV's need a "Trim Tab"
     
  6. Murbs

    Murbs Member

    Joined:
    Oct 6, 2016
    Messages:
    148
    Location:
    Perth Western Australia
    A simpler system would be one that feels like an automatic ice car.
    Ideally the car would coast on no throttle and then apply up to 50kW of regen braking when the brake pedal is applied relatively lightly. When the brake is applied harder, the 50kW of regen would then be augmented with the car's brake pads.
    In most cases the majority of braking would be regen with the brake pads only used for hard braking.
     
  7. Mark E

    Mark E Member

    Joined:
    Jun 27, 2012
    Messages:
    704
    Location:
    Sydney NSW
    That would be horrible. I really don't like driving automatics and the Tesla feels much more like driving a manual that has infinite torque and revs. The only thing I'd like is an option to set the regen to be stronger.
     
  8. BenT

    BenT Member

    Joined:
    Nov 16, 2015
    Messages:
    308
    Location:
    Adelaide, SA, Australia
    I love the regen. I can drive down those hills without having my foot on the brake the whole time wearing my pads. You can limit the regen by feathering the accelerator pedal.
     

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