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Originally Posted by Mortis Awesome project and execution ! As a fellow Dzire owner I may just opt for your services down the line.
Also would you be able to make a 48V mild hybrid system ? Basically just some torque and efficiency boosting without any all electric range |
Youre most welcome to opt for the conversion kit. Drop in your details on my website and I'll send my car over to you for a drive.
Sorry no hybrids.
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Originally Posted by rdst_1 Got it. And as you have said above, you are willing to sell powertrain components to others as well. On that line of thought, do you plan on having kits/components for lower power as well. I will be very keen to making a small electric ATV for use at my farm. And good thing about that will be that it can be designed from the ground up as an electric vehicle and there won't be any requirements of certifications or approvals from the govt as it is only meant to be used for small farm chores. |
Yes you can buy our products from my website as per your need.
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Originally Posted by guptad42 By this logic, Nexon EV can become a great highway cruiser just by adding a second gear optimised for 80-100 kmph, in addition to the current single speed gearing for 50-60kmph?
If it is so easy to extend highway range from 150-160 km to 250-270km, is it not a relatively cheap thing for Tata Motors to do?
Keep the same battery pack, just add a 2nd gear with a simple electric valve/relay to change the gear position. Will probably be hardly 15,000 -20,000 rupees per car. |
You are 100% right. I have not only calculated this but also am currently experimenting on my own nexon ev with this, and IT WORKS. I should not be saying this on a public forum, but for reasons unknown, Tata has opted for a 'not so great' EV conversion Kit entirely from China which is at the moment retrofitted in the standard nexon chassis. Undoubtedly it is a FANTASTIC car, I love it, but the scope of improvement it has is tremendous. I have personally attempted changing the Final Drive ratios and have had huge differences in performance. Whether Tata brings it up or not, I will develop a 2 speed Autobox for the Nexon EV as I am connected with over 1000 users who have lots of issues, specially with range.
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Originally Posted by jasjotbains @stuntfreak - Noob question below
If you have been able to get such a great range with addition of a gearbox, what is stopping the EV manufacturers from plonking in a gearbox? Will it not help address the range anxiety to quite an extent? |
Lets answer this question in a reverse way.
How many speed Transmission does a Drag Race Car have?? Just a 2 speed box. Sometimes 3. And yet it's always the fastest one off the line, with the least timing for the quarter mile at the highest speed you can imagine.
Compare this to a mid performance vehicle. It needs like 6-8 speeds to get somewhere closer to being a fast car on the track.
Now let's apply that logic to EVs.
You've got tons of torque, you have a huge Rev Range, then all you need is a single speed transmission optimized for somewhere close to the first gear of the car, and instead of shifting, just rev it up.. and you have speed.. now western countries have a different mentality. Where they go LARGE on everything. Specially the USA. They just dump in a bigger battery pack, and given their fantastic charging and road network, high payout jobs, and variety of finance options, it all works out well. That's where EV technology was born. And it has been a benchmark ever since.
Now compare it to India.. we care about every penny we pay for. Bad charging and road infrastructure. And manufacturers work on low margins. Given in this scenario, the benchmark design is taken, downsized, and used without prior thoughts behind changes needed as per conditions.
This is my thought process. I have been trying out various transmissions on Electric motors for automotive propulsion for the past many years.. I have coupled, studied, tuned, tested all types of electric motors on CVT, torque converter AT, DCT, MT, Direct Drive, Sprocket based shifter, Nuvinci, and even my own patented CVRTS and another of my own patented 2 Speed Zero Shift box.
I may not be 100% right, but I do have results.. not just on paper, but on the field.
Good day mate.
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Originally Posted by falconion Tesla tried the 2 speed gearbox, but it was found to be unreliable and would be complicated with higher maintenance. They went through several gearbox designs and ended up saying single speed gearbox is better.
The less parts the better and more efficient. The idea being moving away from traditional car making and not making parts overly complicated. |
Relate to my previous post.
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Originally Posted by jasjotbains Thanks Falconion
Hope then Tata can bring out motors which are highly efficient upto the 80kmph mark. Driving above that will introduce avoidable high wind resistance and drag, overcoming which wastes previous battery juice. |
True.