Hydraulic Hybrid Trucks
Created February 15, 2006, at 10:31 am by Anonymous
I just read a brief article suggesting that Ford is nearing the completion of an F-150 Hydraulic Hybrid that will supposedly achieve 60mpg. Has anyone heard of this or know any more information?
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5 years ago
Here's a link: http://www.greencar.com/index.cfm?content=features23
5 years ago
Essentially, this just uses compressed air to store a small amoung of energy. They hydraulic drive is quite common among heavy lift equipment. I don't see anything about 60 mpg. Hydraulic drive is generally used in huge, strong construction equipment. I'd believe something closer to 60 gallons per mile than 60 miles per gallon.
5 years ago
You wrote:
Essentially, this just uses compressed air to store a small amoung of energy.
--------
No, it uses compressed hydraulic fluid to store a LARGE amount of energy. There is far less energy loss with hydraulic storage and TONS of torque. The main disadvantage is weight. Dont knock this technology too fast. Also its easier to properly dispose of hyraulic fluid then a NMih battery.
5 years ago
Unfortunatly, compressing Hydraulic fluid (or any other fluid) is physically impossible as fluids are non-compressible. That is one of the main differences between a gas and a liquid.
If you look at the details of the hydraulic hybrid, there appears to be a 'reservoir' that I assume is filled with air or some other gas. This appears to be how energy is actually stored.
5 years ago
me thinks they are confusing compression with storage. An accumulator stores the power of the oil under pressure.
5 years ago
We now have our first hydraulic hybrid up and running, in a class 3 truck. It only weighs 300lbs more than the original truck power train. So far the system is running very efficiently. We will start to provide some data as it becomes available and verified.
4 years ago
The accumulator is filled with Nitrogen gas and energy is stored by pumping hydraulic fluid in and compressing the gas. The hydraulic fluid doesn't compress because, as ex EV1 driver stated, liquids are not compressible.
What are the specs of your system in the Class 3 truck? I've seen an article on the hydraulic hybrid UPS trucks that stated they use 4 accumulators of 22 gallons each capable of 5,000 psi. They stated the storage capacity of the total system was 2,000 hp-seconds, i.e. starting from full-capacity, it can deliver 100 hp for a duration of 20 seconds.
300 pounds seems small enough to be integrated into larger cars and most trucks and SUVs.
3 years ago
Hey, thanks for the 6th grade science lesson about the differences between liquids and gases. I don't understand why people write stuff here when they have absolutely no idea how the system works
3 years ago
Looks like UPS is driving around now using hydraulic hybrids
http://www.pressroom.ups.com/mediakits/factsheet/0,2305,1315,00.html
Someone has even managed to put one into a BMW 5 series
http://www.artemisip.com/appli_auto_transm.htm
3 years ago
This technology has some very promising results for sure. I'd love to try and combine water hybrid technology and hydraulics into one system. I think increases in efficiency would be tremendous based on what I've seen so far.
3 years ago
Video of the Artemis BMW driving
http://www.youtube.com/watch?v=CJw5AvvxBqg
3 years ago
GM built a hydraulic drive Blazer in 1972.
Never released to the public, but we drove it around our plant site,
until it was broken. Two dudes came down with suits and took every part back with them. Very hush hush.
3 years ago
Hydraulic drive trains are different than the hydrolic hybrids described here that really use compressed gas to store energy. Hydraulic drive trains are generally a means of allowing an ICE to operate at constant RPM for high efficiency while allowing the wheels or other PTO to operate at the speed that it needs to. It benefits from the ability to adjust to fast speed changes. They seem to work great in slow machines such as tractors or skip loaders but I've never heard of them working well in automobiles. I don't know why though.
3 years ago
They aren't great in automobiles because their efficiency under part load is shockingly bad despite their high power density. Hopefully some of these new technologies will improve on that or else they will be back to the farm.
1 year ago
Hybrid tech and effeciency has left out the truck and work vehicle market completely. It is time at least one manufacturer addressed the needs of work vehicles. I cannot have a hybrid vehicle as a work truck yet because I need to pull heavy loads into challenging terrain. At a minimum, I need a 3/4 ton 4x4 for true work purposes. I do not need leather seats or a 6 CD changer. The hybrid revolution has completely ignored the needs of work vehicles.
http://www.usedmonstertruck.com/
1 year ago
In these trucks, have a lots of potential for fuel savings, i think in the future hydraulic trucks have the potential to bet the electric hybrids
http://www.usedbikesmarket.com
34 weeks ago
I didn´t hear anything about Ford´s initiative, but if this is true I hope they will finish it soon. I once asked at a Dodge Ft Lauderdale agency if people are willing to buy hybrid trucks. It seems that a lot of truck drivers want a hybrid alternative.
24 weeks ago
I think if can tow 4000lb 20 times a year and still look and drive straight and smooth after 10 years then and only then it's a truck. A uniibody, FWD Hybrid will have lots of proving to do and it's not the market.
That said, I do think we will some form of kinetic Energy Brake recovery hybrid truck in 2013 or 2014. Maybe hydraulic hybrid, maybe flywheel. It will likely be FWD and Unibody. If it can tow 4000lb and do 25mpg city it will be revolutionary and will break all sorts of sales records.
http://www.cyberpine.com/new-compact-pickup-trucks-of-the-future-2013-an...
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