Forums

A hybrid Tesla?

A hybrid Tesla?

I wonder whether Tesla would launch a hybrid vehicle in the future. Not a fossil fuel powered setup. Wait. A hydraulic hybrid electric one. I′m thinking the current Tesla platform seems to be ideal for that. Unfortunately, the “frunk” would have to go. In its place, a hydraulic pump-motor assembly, together with pressure cylinders might be used to make the car move from standstill and afterwards the electric motor in the rear would take over. All seamlessly. It might be advantageous from the battery bank use optimization point of view. A smaller battery bank might be possible and, last but not least, one that gets discharged much more gently when moving the car from zero to any speed. Braking would improve as well because both the batteries and one of the pressure cylinders would be simultaneously charged. There might be additional benefits as to charging, range and reliability issues concerning the propulsion battery pack as well. Like many others, I also dream of making oil irrelevant even if ever it eventually runs out.

Brian H | August 18, 2013

Silly stuff. What drives the hydraulics? Pressure doesn't come from nowhere.

Mmv3 | August 18, 2013

Why change what already works perfectly, Tesla would waist millions to perfect this idea and not gain much from it, the money, effort and time would be better spent researching better energy storage and transfer, such as better batteries, chargers, and other energy storage technologies ( condensers, coils, etc.)

Timo | August 19, 2013

[Brian H -mode] "Waist" is something you have in your body. "Waste" is something you throw away.

olanmills | August 20, 2013

You're talking about a device which would store energy in the form of pressurized air? There are specialized vehicles which do this.

The only reason you would do this is if you could make either the regeneratve braking or the propulsion more efficient by either only compressing or decompressing the air or using it in combination with the battery and dynamo. You would have to be able to include a compressor that could run off of the electricity generated from regenerative braking and compress the air, and then also a turbine which could then use the compressed air to generate electricity more efficiently than it's already being done.

That sounds complicated. I don't think it would have practical use in passenger vehicle like the Model S.

Guys, his idea isn't totally ridiculous, it's just another form of battery. The question is whether you really gain anything.

ENGINEER | August 20, 2013

@Jose if you read the Model S Wiki page, it states that Tesla considered designing an extended-range hybrid vehicle choice along with the 60kW, 85kW, and 40kW (which was dropped), but later decided against it, wanting to be an all-electric car company in the long run.

Brian H | August 20, 2013

Compressed air vehicles exist, but are loud, using air pistons. Useful in factory lift trucks, etc.

vadik | August 21, 2013

There is a rational reason to think about a pressure air aid and it is regen.

Whenever a car recuperates energy when braking, batteries cannot take it up fast enough so it goes lost. Either pressurized air or a supercapacitor could solve this, or an improved battery for that matter which I see as preferred way.

I think Renault is trying it, and they are not loud anymore btw.

Timo | August 21, 2013

I don't think batteries is the limiting factor there, I think traction and just plain convenience of driving is. Regen could probably be quite a lot more powerful, but car just isn't designed that way. Also RWD regen can't be as powerful as AWD or FWD because of traction problems. Strain to drive axle is also something to consider.

Vawlkus | August 21, 2013

Timo: batteries aren't the limit or supercharging wouldn't be a thing.