Oil & Fuel Diesel Tractor HP vs. ATV or Car

[john_bud]

John.. big difference in CO and CO2

As for the poster who mentioned hybred cars.. those will be great when fuel cells are as common as lead acid batteries are today..

soundguy

What's your point?

Modern engines are computer controlled and burn very completely leaving CO2, water and oxides of nitrogen (NOx) and nearly zero carbon monoxide. That's one reason that football player from Texas didn't off himself after 4 HOURS in a closed garage with the engine running.

Also, plants utilize CO2 directly, not CO. CO is not a plentiful compound as it is not very stable and not a normal byproduct of the life cycle.


And don't forget that if you have fuel cells you get the hydrogen by electrical separation of water into H2 and O2. That water is extra super caustic. Very hazardous. The efficiency of the conversion from water to hydrogen gas, taking into consideration the generation of the electricity is around 30-35%. The rest of the transport, storage at the refueling station, dispensing, chemical reaction for storing in the car, conversion for use and then conversion into forward power drops it down to 10%. {Popping sound, waving wet finger in the air} Big whoop! There is very little gain from that horrifically expensive conversion either in efficiency or environmental. Money would be better spent on small diesel powered cars constructed of monolithic snap together carbon fiber assemblies. 1/4 the weight and 2x the strength of a normal car yielding an honest 100 mpg in a Taurus sized vehicle.


jb

 

[Soundguy]

The data in the first part of your message assumes extremely efficient cars .. all over... when in reality.. only a very small fraction of them are that effecient.. and there are far more older 'poluters' on the road than not.

The last part is, while true.. only a pipe dream at this point. No one that is capable of wide scale production in putting out super efficient ultra-light vehicles even though the technology to undertake it is here. Consumer demand isn't high enough yet.

There used to be an outfit locally where I live that had these economy 3-wheeled commuter cars.. 2 versions a 50mpg and a 65 mpg.. both 2 seater.. 65mpg unit went 40-45mph... the 50mpg version could do 60.

A couple sold here, and then the company tanked... I actually almost got one.. just for the fuel savings. I think they cost int he neighborhood of 6800$ or so for the 'large' one. When i got serious about buying one and went to find the co.. it had newspaper up all over the windows... Hope the other 3 people that bought one are finding service ok?!?

soundguy

 

[Egon]

I surely would like to see that new car John. It's totally feasible with the technologies at hand. Small, lite and powered by well designed small engine.

Maybe add a sterling engine to the mix to utilize the the exhaust heat and run the ancillary equipment.

There is one vehicle out called the Smart car that almost meets your definition. The Volkswagen TDI's do get very good fuel mileage.

Emissions testing, which will be coming and is already here in some places, will eliminate most of the older vehicles as they will not pass tests and can not be certified.

One thing many of us miss is cold weather operation. The interior of the vehicle does require heat for occupant comfort and windshield clarity!

 

[Iplayfarmer]

Along the same lines as the Sterling engine to take advantage of the exhaust heat...

I saw a news blurb on a guy somewhere here out west that has developed a 6 cycle engine. Cycles 1 through 4 are standard 4 cycle engine stuff. Cycles 5 and 6 are intake of water, subsequent steam generation creating a second power stroke.

The engine runs cool enough you can put your hand on the block while it's running. He had addressed all the concerns about using water by re-capturing the steam to re-cycle it through the engine, treating the water, and including a system to shut off the steam portion of the cycles until the engine is up to temp and also to allow the engine to run for a few minutes without steam to dry it out before it shuts down.

It would seem to me one could get more horsepower per gallon out of the fuel by using some system like this.
(^vain attempt to stay on topic^)

 

[Egon]

I too have read that article and it does make sense. However, in the frozen north the water would prove a liability were as a Stirling could use a much different working fluid.

 

[Iplayfarmer]

...in the frozen north the water would prove a liability...

Would it prove any more of a liability vs. antifreeze in your radiator?

 

[Egon]

Yes as steam is being produced.

How the engine works.

Six stroke engine - Wikipedia, the free encyclopedia

 

[Iplayfarmer]

Yes as steam is being produced.

How the engine works.

Six stroke engine - Wikipedia, the free encyclopedia

Understood. I would think there's some additive that would keep the water from freezing that would not keep it from boiling. Maybe I'm wrong.

Thanks for the link. It sounds like there are a number of ways to work a six stroke engine.

Some of these have been around for almost 30 years. Why are they not main stream? What are the obstacles?

 

[Sheetanshu]

This is an important point. A car engine can crank loads of HP, but only runs at about 20% of its peak load capacity at most times. If you ran it at 100% for too long, it would blow up. A tractor runs at 90% of its peak capacity, so its de-tuned to withstand more rigorous use. Someone could probably crank 50Hp out of a BX.. but the engine would not last long.

Sorry to bring up this post again but Ive been searching for something like this for really long and just found it.
I have a Jeep Common Rail Diesel engine which produces 250 Nm at around 2000 RPM and 105 HP at 3800 RPM. will this engine face similar problems with respect to peak capacity ? I wanted ti use this to build my own tractor and can't figure out whether its okay to do that. I researched a lot of car engines and found this to be quite similar. Any insight will be great.

 

[Egon]

The cam, cooling system, fuel delivery system may not be compatible to tractor type use. Probably the service rating for tractor type duties may not be very high.