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Caterpillar D7E: Move earth and save the Earth ( Hybrid Bulldozer...?
CNET ^ | June 12, 2009 2:28 PM PDT | Wayne Cunningham

Posted on 06/12/2009 7:19:45 PM PDT by Ernest_at_the_Beach

Caterpillar D7E

This big dozer, the Caterpillar D7E, is the first to use a hybrid power train.(Credit: CNET)

On the way to a demonstration of Caterpillar's first hybrid dozer, I was expecting it would be one of the little ones, the kind used to dig pools and landscape suburban back yards. But looming up in the middle of Holt of California, a Caterpillar dealer outside Sacramento, Calif., was a huge beast, a massive yellow earth mover, the metal tracks of which came up to my waist. The Caterpillar D7E was a lot bigger than the little hybrid I was expecting.

A Caterpillar representative jumped in the cab and, metal tracks scraping up the clean concrete floor, pivoted the big dozer around and drove it out to the demonstration area, a field of dirt with one big hill, and strategically placed holes and trenches--not to mention a slalom course marked by orange pylons. As a dramatic start to the demonstration, the driver took the 56,669 pound D7E over the steepest section of the hill, the dozer's blade pointing up toward the sky. At the top, it neatly balanced on the crest before making its descent, demonstrating how easily it maintained control on this loose ground.

The D7E differs from traditional earth-moving equipment in that it uses a locomotive-style series hybrid drivetrain.

(Excerpt) Read more at reviews.cnet.com ...


TOPICS: Business/Economy; Extended News
KEYWORDS: caterpillar; hybrid
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1 posted on 06/12/2009 7:19:45 PM PDT by Ernest_at_the_Beach
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To: Red Badger

fyi


2 posted on 06/12/2009 7:20:13 PM PDT by Ernest_at_the_Beach (Support Geert Wilders)
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To: Ernest_at_the_Beach

D7 is nice but the D9 is a sight to behold


3 posted on 06/12/2009 7:22:04 PM PDT by fso301
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To: Ernest_at_the_Beach

>The D7E differs from traditional earth-moving equipment in that it uses a locomotive-style series hybrid drivetrain.

Diesel Turbines! Nice.


4 posted on 06/12/2009 7:27:28 PM PDT by OneWingedShark (Q: Why am I here? A: To do Justly, to love mercy, and to walk humbly with my God.)
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To: Ernest_at_the_Beach

Hybrid my 0bambi, I want to see a carbon belch!


5 posted on 06/12/2009 7:31:22 PM PDT by Not now, Not ever! (The devil made me do it!,.......................................................( well, not really.)
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To: OneWingedShark

No, it is a conventional engine, but the dozer has electric drive motors. The diesel powers a train style generator.


6 posted on 06/12/2009 7:33:49 PM PDT by org.whodat ("Way past time for new commodities regulation")
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To: Ernest_at_the_Beach; Pete-R-Bilt; WSGilcrest; glock rocks; SouthTexas; B4Ranch
It sure ain't my Daddy's D6 from the 40s. Don't the really big earth movers in mine quarries already use this technology...
7 posted on 06/12/2009 7:35:33 PM PDT by tubebender (Whom stole my tag line. Why! I ask, Why?)
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To: Ernest_at_the_Beach
I thought the predecessors had hydraulic drivetrains: i.e. the engine basically drove an oil pump.

Maybe the electric drivetrain is more efficient, but wouldn't the hydraulic drivetrain be a "hybrid" too?

8 posted on 06/12/2009 7:42:06 PM PDT by justlurking (The only remedy for a bad guy with a gun is a good guy with a gun.)
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To: justlurking

http://www.mechanicshub.com/mechanics-hub-community/21-worlds-biggest/148-World-Largest-Truck-T-282-by-Liebherr.html


9 posted on 06/12/2009 7:48:41 PM PDT by org.whodat ("Way past time for new commodities regulation")
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To: org.whodat
No, it is a conventional engine, but the dozer has electric drive motors. The diesel powers a train style generator.

R.G. LeTourneau (LeTourneau, Inc.) built some of the largest earth moving machines in the world. The old man was fanitically opposed to the use of oil hydraulics and insisted that his machines use electric motor powered winches and cable for all the actuators. That extended to the propel drive train as well. He was so biased against oil that he swore that if there was a way to run an internal combustion engine without lube oil, he's do it. After the fonder retired they slowly integrated oil hydraulics into their machines. Many of the huge open pit dump trucks also use and electric drive as well.

Regards,
GtG

10 posted on 06/12/2009 7:51:43 PM PDT by Gandalf_The_Gray (I live in my own little world, I like it 'cuz they know me here.)
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To: Ernest_at_the_Beach

The Hi Track, up drive sprocket a thing of the past?


11 posted on 06/12/2009 7:54:17 PM PDT by reefdiver (So how's that HOPE & CHANGE working out for ya ?)
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To: Gandalf_The_Gray
I read a few years back of ford experiments with conventional style V8 engines made out of glass, using no oil, they turned 12 and 14,000 rpm. Don't know what became of the experiments.
12 posted on 06/12/2009 7:58:29 PM PDT by org.whodat ("Way past time for new commodities regulation")
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To: Gandalf_The_Gray
Are you from East Texas, to know about LeTourneau?
13 posted on 06/12/2009 8:05:59 PM PDT by texas booster (Join FreeRepublic's Folding@Home team (Team # 36120) Cure Alzheimer's!)
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To: Ernest_at_the_Beach



14 posted on 06/12/2009 8:08:27 PM PDT by Andy from Beaverton (I'm so anti-pc, I use a Mac)
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To: Ernest_at_the_Beach
Caterpillar Marketing has snowed this naiive reporter. Hybrid drive earthmovers are not new. For many decades, the R.G. Letourneau "Tournapull" has used electric-drive wheels, powered by a diesel-driven generator...
15 posted on 06/12/2009 8:09:33 PM PDT by TXnMA ("Allah": Satan's current alias...!!)
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To: Andy from Beaverton

(images source)

THAT TASTED GOOD!

16 posted on 06/12/2009 8:11:22 PM PDT by Andy from Beaverton (I'm so anti-pc, I use a Mac)
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To: Andy from Beaverton

BIG “oop-si-daisy”


17 posted on 06/12/2009 8:11:48 PM PDT by digger48
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To: Ernest_at_the_Beach
Every railroad locomotive is a "hybrid".

So is this thing.

I would love a diesel / electric hybrid 1-ton pickup.

Unfortunately, such a thing cannot be made (or can easliy be modified not) to abide by the speed limits.

Consequently, it will never happen.

18 posted on 06/12/2009 8:16:09 PM PDT by elkfersupper (Member of the Original Defiant Class)
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To: Andy from Beaverton

Those excavators are amazing. Plus, everything about them is politically incorrect. I mean, they’re STRIP MINING machines for gosh sakes. They mine for that nasty coal that iBama wants to ban.


19 posted on 06/12/2009 8:20:52 PM PDT by Disambiguator
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To: Gandalf_The_Gray

RG also built the tourna train consisting a string of trailers with an electric motor in each wheel for snow, mud etc. Mercedes also builds diesel electric tractors, bushhogs having electric motors instead of power shafts. RG also put every thing on Rubber. after he sold the company to Westinghouse Air Brake, he developed land clearing machines that mowed down trees. He also had a machine that carried a one BR house made of concrete and set it on a foundation. Amazing man RG, self made, uneducated, a welder by trade. The Earthworm tractor company is searching for Obamadollars convincing the pols that they invented Hybrid earthmoving. BTW I got a letter from Obama Motors saying the Pres was going to take care of mei and offering a $2500 discount on a new Sub. I dont think so unless I bought it from a screwed over dealer
barbra ann


20 posted on 06/12/2009 8:23:49 PM PDT by barb-tex (He will simply soak the filthy rich and help he common man.)
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To: elkfersupper
Diesel Electric Locomotives are NOT Hybrids... the electrical power is fed directly into the traction motors as the engine is engaged.

But General Electric and EMD have developed Hybrid's that have banks of batteries in them that Store the electrical power into them.. then are applied to the traction motors as the engineer directs.

But this is all new stuff.. and I only have heard of the BNSF Railway experimenting with one or two switchers with this technology.

21 posted on 06/12/2009 8:25:29 PM PDT by Kitanis
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To: Disambiguator

But, but Obma told the mining communities he loved coal and was committed to clean coal technologies...


22 posted on 06/12/2009 8:28:23 PM PDT by Voter62vb
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To: org.whodat

Glass Engines, Remember the Vega and teflon lining in the cylinders. HF also built with fiberglass.
barbra ann


23 posted on 06/12/2009 8:30:56 PM PDT by barb-tex (He will simply soak the filthy rich and help he common man.)
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To: Kitanis
Diesel driving the traction wheels would not be a hybrid.

Diesel driving a generator driving the traction would be.

24 posted on 06/12/2009 8:34:08 PM PDT by elkfersupper (Member of the Original Defiant Class)
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To: Ernest_at_the_Beach

The dirty little secret is “hybrid drivetrain’s” are hundred year old technologies


25 posted on 06/12/2009 8:38:45 PM PDT by tophat9000 ( We are "O" so f---ed)
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To: Ernest_at_the_Beach

Oh GMAFB


26 posted on 06/12/2009 8:39:14 PM PDT by Dr.Deth
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To: Ernest_at_the_Beach

Cooool.


27 posted on 06/12/2009 8:40:33 PM PDT by El Sordo
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To: Andy from Beaverton

Now that's my idea of a roto-tiller.

28 posted on 06/12/2009 8:40:44 PM PDT by Dr.Deth
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To: elkfersupper
How do you figure? My father was a machinist working both on steam locomotives and 1st and 2nd generation Diesel Electric locomotives. Both on the Chicago, Burlington, and Qunicy Railway and the Union Pacific Railroad, for which he retired from after 30 years.

The Diesel drives a Alternator producing electrical power to the traction motors in a regular Diesel Electric Locomotive. When the Engineer operates the throttle.. the Diesel engine engages..produces power that goes to the traction motor on the wheels.

A Hybrid version would be.. the Engineer engages the throttle.. which produces power which goes to the traction motors initially.. but also charges the banks of batteries. When the engineers needs the power he can apply to the engine such as in the GE Evolution Locomotive.. Or in a present switcher.. the batteries is what is charged and the engineer engages the throttle to run the traction motors from that bank of batteries..

Links below: http://ge.ecomagination.com/products/evolution-hybrid-locomotive.html

http://www.tc.gc.ca/programs/environment/ecofreight/casestudies/images/idc2-eng.gif

29 posted on 06/12/2009 8:46:49 PM PDT by Kitanis
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To: Voter62vb
But, but Obma told the mining communities he loved coal and was committed to clean coal technologies...

Clean coal = no coal.

30 posted on 06/12/2009 8:50:50 PM PDT by Disambiguator
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To: Ernest_at_the_Beach
Little did I know that the ship I was on, built in the 1940's, was a hybrid. Had two diesel engines driving generators which powered one very large electric motor.

I anyone had said we were riding a hybrid there would probably have been a fight.

31 posted on 06/12/2009 8:54:18 PM PDT by FreePaul
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To: FreePaul

R.G. LeTourneau, industrialist and inventor powered his mighty earth moving scrapers “Tournapulls” with electric motors on each wheel. The unit was steered by a central electric motor between tractor and scraper. Incredible engineering from an incredible man.

As a talented engineer/physicist I invented a perpetual motion machine, just like ALgore invented the internet. Now .. if I can only figure out how to get it started .......


32 posted on 06/12/2009 9:00:50 PM PDT by HiramQuick (work harder ... welfare recipients depend on you!)
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To: justlurking
The answer to your question, yes. By the way, I'm gonna say goodbye to my D-10. Won't pass smog...hmmmph! But, alas! I'm getting one of these...

Komatsu 375A

33 posted on 06/12/2009 9:17:23 PM PDT by WSGilcrest (Hey. I can quote myself.)
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To: justlurking; tubebender

Sorry about that, post #33 was intended for tube.


34 posted on 06/12/2009 9:19:34 PM PDT by WSGilcrest (Hey. I can quote myself.)
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To: texas booster
Are you from East Texas, to know about LeTourneau?

I know about KeTourneau and I'm in central Illinois....Caterpillar country.

35 posted on 06/12/2009 9:22:11 PM PDT by Graybeard58 ( Selah.)
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To: texas booster; Gandalf_The_Gray

I have a LeTourneau Westinghouse road grader :)


36 posted on 06/12/2009 9:41:23 PM PDT by Colorado Doug (Now I know how the Indians felt to be sold out for a few beads and trinkets)
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To: Ernest_at_the_Beach

This isn’t a “hybrid” it is a diesel-electric, the same drive they use in Locomotives. The diesel engine runs all the time, not just when the batteries run down as happens in a hybrid car, the diesel runs a generator which is used to power the electric drive motors. Old technology.


37 posted on 06/12/2009 10:06:36 PM PDT by calex59
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To: Graybeard58

LeTourneaus are used every where. When the lumber mill in my area used to operate(from 1945 until 1998, when the greenies caused it to be shut down and 650 jobs lost), we used LeTourneaus to haul logs from the log decks to the mills and to off load the tucks and stack the logs. Huge puppies and fun to drive.


38 posted on 06/12/2009 10:09:39 PM PDT by calex59
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To: Ernest_at_the_Beach

Where are the solar panels to power that bulldozer ? ( Sarcasm ) ...


39 posted on 06/12/2009 10:22:37 PM PDT by Prophet in the wilderness (PSALM .53 : 1 The FOOL hath said in his heart, there is no GOD.)
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To: OneWingedShark
Diesel Turbines! Nice.

Turbines?????


40 posted on 06/12/2009 10:26:28 PM PDT by ColdWater
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To: Ernest_at_the_Beach
Hybrid shmybrid, can it flatten a pro terrorist “protester” into a pancake? that's what I want to know.
41 posted on 06/12/2009 11:27:05 PM PDT by CzarNicky (The problem with bad ideas is that they seemed like good ideas at the time.)
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To: CzarNicky

LOL!


42 posted on 06/13/2009 8:23:35 AM PDT by Ernest_at_the_Beach (Support Geert Wilders)
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To: texas booster
Are you from East Texas, to know about LeTourneau?

Actually no, I'm an ex-logger from northern Wisconsin who went off to college and got two engineering degrees. We had our own R.B. in Baraga UP Michigan. Pettibone was cut from the same cloth.

Regards,
GtG

43 posted on 06/13/2009 8:56:11 AM PDT by Gandalf_The_Gray (I live in my own little world, I like it 'cuz they know me here.)
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To: tubebender
Don't the really big earth movers in mine quarries already use this technology...

The dozers are conventional, but I know the large dumptrucks are electric wheels with diesel/electric generators under the "hood".

The largest cable shovels and draglines are all electric connected directly to the grid with a big flexible cable drug along by a dozer.

44 posted on 06/13/2009 8:59:17 AM PDT by SteamShovel (When hope trumps reality, there is no hope at all.)
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To: org.whodat
Ford experiments with conventional style V8 engines made out of glass, using no oil, they turned 12 and 14,000 rpm. Don't know what became of the experiments.

I don't know how glass would work out as it is actually a "super cooled" liquid which gets softer as the temperature increases, it doesn't actually melt (go thru a phase change) at any particular temperature.

I had heard about GM working with high strength ceramics which have very good high temperature characteristics and can take compressive loading in stride. The down side is they are very brittle and are lousy in tension. I know they got some demomstration "proof of concept" prototypes running but what happened after that I lost track of.

I worked for a hydraulics firm that built vane pumps. We also tried ceramics for pumps that ran fireproof fluids as they generally have low lubricity. We found that it could work if a ceramic ring was shrunk fit inside a steel ring. That left the ceramic under a large compressive loading much like tempered glass. The problem was the vanes that slid along the inner surface of the ring. We tried just about every tool steel and heat treat we could think of up to titanium carbide but the wear rates were uniformly unacceptable. When you really think about what we had invented was an "inside out" grinding wheel which ate up the mating parts as fast as we could shove them into the pump!

Some things just aren't meant to be...

Regards,
GtG

45 posted on 06/13/2009 9:21:34 AM PDT by Gandalf_The_Gray (I live in my own little world, I like it 'cuz they know me here.)
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To: Ernest_at_the_Beach

Why don’t they just run it on used french fry oil?


46 posted on 06/13/2009 10:15:28 AM PDT by ozzymandus
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To: org.whodat

Ferdinand Porsche invented that type of drive train for his version of the Tiger tank. It was a bust, but he was pals with Hitler, so they built 100 of them anyway.


47 posted on 06/13/2009 10:17:06 AM PDT by ozzymandus
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To: fso301

What a laugh...a D7 huge????

Try an 11.


48 posted on 06/13/2009 10:18:43 AM PDT by Cuttnhorse (Obama...the convergence of Affirmative Action and the Peter Principle)
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To: WSGilcrest
I'll take this bad boy any day:


Caterpillar D11

49 posted on 06/13/2009 10:22:32 AM PDT by Cuttnhorse (Obama...the convergence of Affirmative Action and the Peter Principle)
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To: Cuttnhorse
What a laugh...a D7 huge???? Try an 11.

D7 always impresses me as being in the upper range of medium duty. The D9 is what turns my head.

I've never seen a D10 or D11, I can only imagine the tingling sensation that would run up my legs at the sight of one of those behemoths.

50 posted on 06/13/2009 10:29:58 AM PDT by fso301
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