Salty9 Hybrid

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Salty9
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Post by Salty9 » Tue, 11 Aug 2009, 20:20

I don't know if this is the proper protocol as I do not have a vehicle started yet but have been sporadically planning to build a hybrid trike for a number of years. My plans are:

Rear wheel and motor from Honda 450
Front sub frame from small Asian car
Steerable front wheels driven by converted alternators
Tubular frame construction
Energy absorbing nose (designed by Rutan - made of foam and beer cans)
Side by side seats with five point harness
Total mass less than 500 kg

I would appreciate any feedback or suggestions. Thank you.








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Richo
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Post by Richo » Fri, 14 Aug 2009, 08:44

Why a hybrid?
What range do you need on this vehicle?

Also how are the alternators connected to the front wheels?
Alternators aren't really that great a choice for a motor.
Small series DC motors would be better.
or a Mars brushless if you want regen.
I know alternators seems attractive because they are initally cheap.
But performance wise, efficiency and control they are not that great.
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Post by Taffy » Fri, 14 Aug 2009, 14:23

Welcome, i think you will find the 500kg mark a little hard.
A Lotus 7 replica comes in at around 650-750 and they are seriously stripped down cars. A trike might be doable, but it will be touch and go thanks to the battery weight.

Beer cans as energy abosrbing... i have seen tests we did with SAE cars using soft drink cans just for fun... I would not use them.

There is a new book by Seth DIY Hybrid book. Though this seems to focus on converting a prius and talks about what conversion companies do more then it being a DIY guide. Seths other book on build your own electric vehicle is a better read as it has all the same and more design info.Build your own Electric Car

I would recommend having a read of Zero Carbon Car. The last 3rd of the book is a very very good guide of how to do the installation of an electric/hybrid system.
Last edited by Taffy on Fri, 14 Aug 2009, 04:27, edited 1 time in total.

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Post by EV2Go » Fri, 14 Aug 2009, 17:27

A single seater you might be able to do 500kgs with a lot of expensive parts, but highly doubt it as a duel seater due to the extra metal in the chassis. I have been looking at the idea of a trike on and off for ages and I was figuring on around 600-650kgs using lithiums.

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Post by Salty9 » Sat, 15 Aug 2009, 18:45

Thanks for the feedback. It made me think about what I really wanted to do.

I got my initial inspiration from the TRex trike which is way more than I want or need.

I decided to go with a hybrid as my usual trip is 100km of highway driving dodging logging trucks and 20km of urban driving.
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Richo
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Post by Richo » Sat, 15 Aug 2009, 21:47

Sounds ok.
But I would probably choose the Mars brushless over the alternators.
Would make for an interesting arrangement.

Take off the petrol and electric could power it.
Braking the electric could regen the small battery pack.
Cruising the elec could regen slow until the pack is full.
Quiet mode just electric with reduced performance.

Maybe around 5kWh of batteries in lithium.
This gives decent range for a quiet urban run.

Control of 2 independant elelctric motors and 1 petrol motor could be a trick to control.
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Simon
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Post by Simon » Sat, 15 Aug 2009, 22:51

The EMIS - engine motor interface system could be a neat solution to controlling a hybrid.
I found a thread somewhere the other day about a hybrid fiero using a s10 electric drivetrain powering the front wheels and ice driving the rear wheels. It had 2 accelerator pedals.

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