Thread: Hybrid series Landrover

just checked it....

not the setup the inspired my initial curiosity to the concept.

I have a somewhat different plan.

Remove gearbox and engine.
Fit a large electric motor to the TC - with ratios capable of a top speed of 90-110ish.

Rather than batteries, a couple of VERY large capacitors (or possible batteries instead), and a small, efficient diesel generator mounted somewhere.

So you have a vehicle capable of the same speed, acceleration and range as the original. But with Max torque from stationary.

Overall fuel consumption should be reduced, as no idling, smaller, more efficient diesel, etc etc...

google super capacitors

Originally Posted by isuzurover

I have a somewhat different plan.

Remove gearbox and engine.
Fit a large electric motor to the TC - with ratios capable of a top speed of 90-110ish.

Rather than batteries, a couple of VERY large capacitors (or possible batteries instead), and a small, efficient diesel generator mounted somewhere.

So you have a vehicle capable of the same speed, acceleration and range as the original. But with Max torque from stationary.

Overall fuel consumption should be reduced, as no idling, smaller, more efficient diesel, etc etc...

I think that is along the right lines. Advantage of supercapacitors is that they allow regenerative braking to be effective.

The whole problem though with this sort of setup, is that you have, in the generator to motor effectively an automatic transmission. With losses of probably 15-25%. This makes an automatic look efficient! To finish up ahead, you have save that 15-25% in increased efficiency of the small diesel and no idling before you start making any gains. I'm not saying it can't be done, but there are good reasons why diesel-electric transmissions have only caught on in general in railway locomotives where the advantages of a simple drive to all wheels and stepless drive outweighs the loss in efficiency.

I'm not saying it can't be done, but I suspect the advantages will be pretty illusory by the time you take into account the losses and the extra weight of generator, electric motor and batteries/capacitors. This is one of the reasons this sort of setup often has motors in the hubs - by scrapping the whole drive train you can get ahead of the game. But I am not sure that is a good idea in an offroad vehicle.

John

my back of the napkin maths had me believing that keeping the gearbox allowed you to use a significantly smaller motor with a smaller generation plant that operated at about peak fuel economy using the batteries as a capacitor setup you could come away with good economy when you had to run the charging plant and providing you kept your runs to within battery range almost no cost if you charged up on off peak power.

Dave, and others interested in this subject, you might find the article in the June 2009 Silicon Chip magazine of interest. In particular they discuss the type of motor to be used etc. This was for a pure electric car, but a lot of the information would apply to a hybrid.

John

maybe wait until these things are available s/h with dead batteries

http://www.vectrix.com/

20hp brushless motor and controller with integrated regenative braking system.

I'm sure you could work out a simple mod to kick the regen system in when the charge is low and you'd have a pretty much off the shelf system to hybrid your landy

Originally Posted by procrastination inc

maybe wait until these things are available s/h with dead batteries

Vectrix AU :: Homepage: Vectrix 100% Personal Electric Vehicle, Electric Scooter, Zero Emissions::Vectrix.com

20hp brushless motor and controller with integrated regenative braking system.

I'm sure you could work out a simple mod to kick the regen system in when the charge is low and you'd have a pretty much off the shelf system to hybrid your landy

I like your thinking.

That and a few Lithium Ion batteries (for shunting traffic type work) and a super capacitor to take advantage of the re-gen braking and it would be a pretty good KERS type system, imagine when over taking up hill how well 20hp extra would go down

I recon that I could probably get out of it for $10k or close to it...

Still, would be a nice gimmick