• May 21, 2007
click above image to view more high-res pics of Wal-Mart's green machine

Wal-Mart has embarked on a wide-ranging environmental campaign it calls "Sustainability 360," and one of the program goals is to increase overall fleet efficiency by 25% over the next several years. To that end, the retail giant has taken delivery of its first Peterbilt Model 386 Hybrid. The 386 Hybrid is the truckmaker's (and the industry's) first Class 8 hybrid rig, and if projections are correct, using one could help drive down owner/operators' fuel costs by $9,000 a year (based on a diesel fuel price of $2.50/gallon), which is some serious green.

The hybrid system was developed by Eaton, and it works as you'd expect it to. Braking energy is captured and stored in the system's batteries, which provide juice to the truck's main electrical system, accessory systems, and a generator/motor that gives the vehicle extra torque and helps extend its overall range. When conditions allow, the rig can even run on batteries alone. While it serves in Wal-Mart's fleet, the truck will continue to be tested, evaluated and tweaked by Peterbilt ahead of the model's full production debut in 2009.

[Source: AutoblogGreen]


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    • 1 Second Ago
  • 16 Comments
      • 7 Years Ago
      Hybrid technology for OTR trucks does allow one major fuel efficiency improvement, it allows sizing a smaller engine and still getting the same amount of torque when it is needed.

      Common car hybrid electric motors are pushing 200 ft-lbs of torque, just using one of those could allow a move from a 15L to a 13L engine with the same untracking, hillclimbing and acceleration with the smaller fuel consumption. It would also help offset the weight of batteries by removing a few hundred pounds of engine weight.
      • 7 Years Ago
      I guess Green is the fashion color this year.Creating a more green environment, saving some serious green and the green color for the truck.
      • 7 Years Ago
      They really do need to start making hybrids for rigs and medium to large box trucks. Our fuel costs alone for our truck were a little over $1K this past month. Thankfully diesel has remained constant the last few months.

      • 7 Years Ago
      Interesting to see how this turns out. Like most hybrids they are the least efficient on the highway.
      Which is where most of these trucks will be used.
      Some cities actual ban idling within city limits so
      this is where a webasto is the cat's meow. Basically a little diesel engine that warms the bunk and keeps the big engine warm enough to eliminate cold starts.
      Of course a hybrid might shine in mountainous/hilly terrain with regenerative braking.
      • 7 Years Ago
      Hopefully this can at least alleviate the ridiculous amount of idling I see all the time from diesel vehicles.

      Well, actually, I would like an explanation (if someone doesn't mind =) ). I'm not trying to be rude... just curious, why do you big diesel operators always leave the engine idling? Just to power accessories? How about times when you're not even in the vehicle?

        Frank
        • 6 Years Ago
        I have driven class 8 trucks with sleepers over the road for 18 years now, so I may be best suited for answering this question. Many "old time truckers" just have the attitude that the truck runs from the time I leave the house to the time I get home. This is how it USED to be due to the older style engines and the relatively CHEAP diesel prices 80 cents or less a gallon. In colder climates or winter months it eliminates climbing into a freezing cab or perhaps not being able to restart the big diesel engine with 11 gallons of cold thick engine oil. Start ups are hard on engines and starting components, but with the price of diesel over $3.50 a gallon currently and engine idle consumption from 1 to 1.5 gallons per hour this is where a $7,000 to $10,000 Diesel APU (Auxilary Power Unit) generator makes sense. The small one to three cylinder motor runs about 8 hours on one gallon of diesel and while running can heat the truck engine oil or coolant to eliminate cold starts. They also charge the trucks batteries and use the trucks existing batteries to start the APU. They use the diesel right out of the rigs tanks which is typically between 200 and 300 gallons so there is never any hasle about fueling them. Most offer 110/120 household electrical 3000 to 6000 watts and 10,000 to 20,000 BTUs of heating and A/C for the cab. I have one on my truck and I love it. One last thing is it reduces the wear on the engine. Idleing an engine is the fastest way to reduce engine life. You MUST set the idle at 900 RPM minimum to keep the oil pressure up to lubricate the engine while idleing. A 600 RPM idle for more than a few minutes does the engine more harm than actually pulling a loaded trailer up a mountain. (some will argue about the RPM #'s I just mentioned, but you get the idea) Idleing is bad in every form. Diesels require start up and cool down times and one big reason is because all class 8 trucks are turbo charged. It is important for longtivity of the engine life. Turbos will remain spinning for over a minute after the engine is shut down when the engine has been working and is immediately shut down. The turbo will not be lubricated when immediately shut down and this is why you must idle 3 minutes for proper cool down and turbo lubrication/life. Some trucks are equipped with engine timers for this purpose. Excessive Idle when a driver is not in the truck and does not need to run the heat or A/C to keep himself comfortable is ridiculous. It is a bad habit. With no APU it may be necessary for a driver who is IN THE TRUCK to idle so he is comfortable and able to get proper rest so he/she may drive safely after their break. If you think trucks should never idle please go sit in your car for 10 hours in 90 degree heat or in 30 degree cold and try to sleep with the car not running. After 11 hours of driving we must take a 10 hour break per FMCSR (Federal Motor Carrier Safety Regulations) I have heard that states with anti idle laws allow a truck to idle if there is an animal such as a dog on board. I believe the law is the vehicle can not idle longer than 3 or 5 minutes while UNATTENDED. Drives want to make you believe that you can get a ticket for idleing PERIOD. If you are in the truck you can idle or If a pet is in the truck and you are not you can idle. There is no way they can enforce a law that may lead to injury or death (heat stroke/hypothermia) if a person sleeps in a vehicle that has a sleeper berth and has no way to keep warm or cool.
        Just like the Bible, the FMCSR is full of interpretation. It is hard to get things in black and white. Let me write a particular quote on speed and logging (log book) and miles. code 392.6 Schedules to conform with speed limits. NO motor carrier shall schedule a run nor permit nor require the operation of any commercial motor vehicle between points in such period of time as would necessitate the commercial motor vehicle being operated at speeds greater than those prescribed by the jurisdictions in or through which the commercial motor vehicle is being operated. END OF CODE
        NOW.... if you are in a 65 MPH state and drive all the way on the interstate and average 62 MPH for 10 hours straight driving (possible??? I say yes) can you log 620 miles in 10 hours if that is how you drove it and you did not exceed the posted 65 MPH speed limit??? here is 392.6 DOT interpretations in my FMCSR book. Question 1
        How many miles may a driver record on his/her daily record of duty status and still be presumed to be in compliance with the speed limits?
        Guidance: Drivers are required to conform to the posted speed limits prescribed by the jurisdictions in or through which the vehicle is being operated. Where the total trip is on highways with a speed limit of 65 mph, trips of 550 to 600 miles completed in 10 hours are considered questionable and the motor carrier may be asked to document that such trips can be made. Trips of 600 miles or more will be assumed to be in
      • 7 Years Ago
      That is one hot rig!!
      far jr
      • 7 Years Ago
      The electric assist portion only contributes about 7 percent to fuel savings while driving (Still quite a bit for class 8 trucks). The remainder, I presume, comes when the driver is in the sleeper and all of the accesories are powered by electricity rather than a diesel generator. Nice fuel savings and a quiet rest.
      • 7 Years Ago
      Hey Gator,
      Hino just unveiled a Hybrid box truck in Australia, too. I wrote it up over at ABG:

      http://www.autobloggreen.com/2007/05/19/australia-hino-hybrid-introduced-completes-24-hour-endurance-t/
      • 7 Years Ago
      Kudos for Peterbuilt real-world testing their hybrid rig. Kudos to Ford for finding a taxi company to test durability of the Escape Hybrid. Now as racy and compact as the Volt is, who's gona do durability testing for the General and Maximum Bob Lutz? If they'd like to build and farm out about 500 of them to real world customers, I'd sign up!
      • 4 Years Ago
      It were the trucks looks cool as though the color is green,Batteries are in good form no doubt which provide nice comfort into the trucks.Like electrical systems are nice.
      Most good job did by the peterbilt that the rig can even execute on batteries alone.though retro but good in the trucks.
      Ford trucks for sale
      • 7 Years Ago
      Cool Peterbilt Wallpaper :

      http://www.mycustomwebsearch.com/pete/

      More Free Wallpapers at:

      http://www.mycustomwebsearch.com/
      • 7 Years Ago
      Its a combination of factors actually.
      Some of the time idling is used to power on trailer refridgeration.
      The rest of the cases is to keep the engine warm and well lubricated for maintenence reasons.
      Its takes a suprising amount of time to warm up a big rig and its enormous cooling system.
      Most rigs pull down about 6 to 8 Mpg on a good day and you get from 3-5 Mpg on a cold start gradually improving as the engine warms up.
      Drivability as well as fuel economy suffer as well as engine life during any cold starts.
      Additionally there is considerablly less wear on the battery, alternator and starter not shutting down and firing up the engine at every stop.
      Idling consumes around 1-3 gallons of fuel an hour.
      Considering the cost of engines and related electrical its a method mostly used by long haul truck drivers to get the most operation hours out of the Rig.
      Afterall, time is money.
      Im sure Walmart will save massive coin longterm on these new Hybrids.
      Im sure others will follow and swallow the higher initial cost to save money longterm.
      A good example where driving a hybrid saves big money.

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