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Thread: How to make electric vehicles audible?

  1. #61
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    Quote Originally Posted by austastar View Post
    Hi,
    Thanks, you reminded me of a point I forgot. There was a hydraulic pump that only ran when the vehicle was a low speed.

    Found the video


    It is all interesting tech to me, not that I understand it all.
    If the electric pushbikes had been around 30 years ago I would have bought one. The 10km commute on the push bike took a bit longer after age 40.
    Cheers
    Neato , not a bad thing when you remove the torque converter , Old video 2013 , they are using DC Motors , almost everyone has moved onto AC motors now , indication of how fast the tech is moving. DC Motors had their benefits though, they are torque monsters but don't have regen braking and cant be sealed against dust / water.

  2. #62
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    Hi,
    In the 70s a friend was doing a project electric car for his engineering degree. It was a Fiat (Bambino?) with the clipped canvas roof. His project was focussed on the circuitry involved in controlling the DC current.
    At the time I was doing a lot of drawing with Rotring pens and stencils, so I redrew his circuits to publication standard for his thesis.
    It was a nippy little beast. I took some photos of him driving, using a slow shutter speed and panning to get a really good speed blur for the background.
    They came out well, and as he was tall, his blond hair flew in the wind out the sun roof, adding to the speeding effect.
    It may have been one of the first electric cars in the State, but I have no idea what has happened to it or Graham either.
    Cheers

  3. #63
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    Quote Originally Posted by goingbush View Post
    Reverse does not need additional circuitry , just a toggle switch, the wiring is already there.

    The problem with auto trans is the motor needs to keep running when the vehicle is stopped for the hydraulics, Going back a few years a Manual planetary 2 speed gearbox like the Ford T Model would be perfectly suited.


    gears are useful

    When a stall situation occurs, what does the motor and controls do? Eg. What if any logic is there?
    Cheers
    Tombie

    D4 MY11
    - Just about the way I want it.
    D90 MY15 - Just about the way Mrs Tombie wants it.

  4. #64
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    Quote Originally Posted by Tombie View Post
    When a stall situation occurs, what does the motor and controls do? Eg. What if any logic is there?
    If it stalls going up hill the vehicle stops & starts going backwards, even with throttle pedal fully on .
    The factory programing senses full power at zero RPM & cuts power to the motor so as to not overload anything, Definitely not an ideal situation, but at least the regen will kick in an d slow you down.

    The same programme makes it hard to do a burnout, or otherwise break traction .

    I do have a dealer level programmer but have been warned not to alter parameters I don't understand, and thats most of it. Ive played with the throttle map and altered the power in Eco mode but for the most part the factory default is pretty good.

    Heres another video comparing Kw power usage with different gears , and the vehicle stalls at 1.54 and at 2.33 just starts rolling back in gear , I'm still holding full throttle as it rolls back and purposely don't touch the brake as I needed to go back anyway, you can see regen kick in as it rolls back (power goes negative = charging the battery)

    The motor is only 150Nm, I doubt a factory built EV would have the problem . I'd hope they will have sufficient torque to begin with and perhaps might interact with ABS to grab the brake if such a situation arose. I understand the logic behind it as keeping pumping power into a stalled motor is not an ideal situation, but some warning or modulation would be good .


  5. #65
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    Homestar is offline Super Moderator & CA manager Gold Subscriber
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    Your dog appears to be quite confused about why you drove up and down the same hill so many times. 😁


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  6. #66
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    Quote Originally Posted by Homestar View Post
    Your dog appears to be quite confused about why you drove up and down the same hill so many times. 😁
    I noticed he was getting aggro, all he wanted to do was go to where he last spotted a rabbit a bit further along.

  7. #67
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    Getting back on topic, Fellow Iveco 4x4 owner doing a world tour spotted this "Horseless carriage" in Mexico ,

    note the rear axle . Hope it has an audible 'Clippity Clop" sound generator




    or a gringo at the front with a set of Monty Python coconuts.


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