Hydraulic Hybrid
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From: Maine, Virginia
Hydraulic Hybrid
http://www.epa.gov/OMS/technology/420f04024.pdf
I was reading about this in an issue of car and driver and how the EPA and the UPS have partnered up to build 7 prototypes and use this system on a 23000 lb platform.
Though this isn't new or ground breaking, it's the first that I had read about it and I'm pretty impressed.
Tim
I was reading about this in an issue of car and driver and how the EPA and the UPS have partnered up to build 7 prototypes and use this system on a 23000 lb platform.
Though this isn't new or ground breaking, it's the first that I had read about it and I'm pretty impressed.
Tim
Cargo Master
Joined: Jan 2004
Posts: 2,512
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From: Cook Forest and Irwin PA
Wish there was some meat in there to gauge what they are doing. Fluids cannot compress so its not like you can store energy in them.
If I had to guess the accumulator system would let the braking pump fluid into a high pressure air bladder of sorts and it would expell outward on take off, easing the engine, but it would be short lived.
As always, I want a test drive first
If I had to guess the accumulator system would let the braking pump fluid into a high pressure air bladder of sorts and it would expell outward on take off, easing the engine, but it would be short lived.
As always, I want a test drive first
Hotshot
Joined: Oct 2002
Posts: 18,488
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From: The Big, Oregon
Hydraulics was never explored commercially due to the weight and expense of the storage vessels, as well as the noise. I have seen a true hydraulic hybrid, it was a VW Rabbit diesel, and it got about 85mpg. The engine drove a variable displacement pump, the wheels were driven by a variable hydraulic motor, and the cargo area was filled by a pair of accumulators set up for 10,000psi. It was slow and complex to drive since the variable motor was manually controlled, so you were constantly moving this lever around to set it right.
Cargo Master
Joined: Apr 2001
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Nitrogen-filled accumulators are ancient news in the aircraft world, and so are the sort of electronic control valves (think "flight controls" ) required to make use of them in an automotive application.
It would be neat to be able to tap such system to run hydraulic accessories like hydraulic motors and winches.
It would be neat to be able to tap such system to run hydraulic accessories like hydraulic motors and winches.
Cargo Master
Joined: Apr 2003
Posts: 3,476
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From: Frequently frozen MN
Video of the system here
http://reviews.cnet.com/8301-13746_7-10194134-48.html
Wonder if it worked out. UPS was supposed to start using them early this year, but the reports seem to stop around March -- apparently when they were to be delivered.
Might be a good option for the bigger vehicles. Seems simple enough ( as a concept).
Related news, electric hybrids are apparently chewing through the world's supply of some scarce element for their batts and motors. (whoops)
http://reviews.cnet.com/8301-13746_7-10194134-48.html
Wonder if it worked out. UPS was supposed to start using them early this year, but the reports seem to stop around March -- apparently when they were to be delivered.
Might be a good option for the bigger vehicles. Seems simple enough ( as a concept).
Related news, electric hybrids are apparently chewing through the world's supply of some scarce element for their batts and motors. (whoops)
Post Fiend
Joined: Jun 2001
Posts: 5,228
Likes: 5
From: Running Springs CA
Nitrogen-filled accumulators are ancient news in the aircraft world, and so are the sort of electronic control valves (think "flight controls" ) required to make use of them in an automotive application.
It would be neat to be able to tap such system to run hydraulic accessories like hydraulic motors and winches.
It would be neat to be able to tap such system to run hydraulic accessories like hydraulic motors and winches.
What happened to the flywheel powered bus I saw in Popular Science in the 1960's?
Jim
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Hotshot
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