2011 Ford F-Series Super Duty Power Stroke Diesel is Cleanest Ever; Fuel Economy Greatly Improved


PHOTO (select to view enlarged photo)

ST. LOUIS, March 9, 2010; The all-new 2011 Ford F-Series Super Duty delivers best-in-class torque, horsepower, towing and payload capability - and does it all more efficiently, resulting in less fuel usage and extended maintenance intervals that can translate directly into bottom-line savings for customers.

"The 2011 Super Duty is not only the most powerful, most capable and fuel-efficient heavy-duty pickup truck on the road, it performs the tough jobs with even more efficiency than ever before," said Doug Scott, truck group marketing manager. "Customers can be confident that Super Duty's class-leading capability comes with Ford's 'and solution' of best-in-class fuel economy."

All-new diesel and gas engine powertrains are the backbone of the 2011 Super Duty's best-in-class towing (26,400 pounds for F-550 chassis cab with fifth-wheel hitch) and payload capability (6,520 pounds for F-350 dual rear-wheel pickup). The Ford-designed, Ford-engineered and Ford-built 6.7-liter Power Stroke V-8 turbocharged diesel engine produces best-in-class 735 ft.-lb. of torque at 1,600 rpm and best-in-class 390 horsepower at 2,800 rpm. The new engine is compatible up to B20 biodiesel fuel as well.

The new 6.2-liter V-8 gasoline engine also boasts best-in-class numbers of 405 ft.-lb. of torque at 4,500 rpm and 385 horsepower at 5,500 rpm. The new engine is E85 compatible.

Mated to each engine is the all-new 6R140 heavy-duty TorqShift six-speed automatic transmission. The added feature content and overall efficiency of the transmission are the main reasons for the improved fuel economy. The all-new 2011 Ford F-Series Super Duty equipped with the 6.7-liter Power Stroke diesel averages an 18 percent improvement for pickup models and up to 25 percent improvement for chassis cabs versus 2010 models. Trucks equipped with new base 6.2-liter V-8 gas engine average a 15 percent improvement versus 2010 models.

"The new transmission is a 'clean-sheet' design, developed specifically to handle the significantly increased torque produced by the new diesel engine and the higher rotational speeds produced by the new gas engine, and to deliver the power to the wheels seamlessly and efficiently for heavy-duty truck customers," said Al Bruck, transmission engineering manager. "Each system and component was scrutinized to deliver optimum performance."

Here's a closer look at what was achieved and the benefits to the customer:

  --  New torque converter that locks at a far lower rpm than the
      competition: The new, stronger torque converter is core to the
      improved transmission performance. One key component is the
      long-travel turbine damper that allows the transmission to lock
      earlier, at a lower rpm, which translates to less slip and more fuel
      efficiency. The new transmission locks down to 900 rpm, which is about
      200 rpm less than the outgoing product and more than 100 rpm less than
      competitors. The second key component of the torque converter is the
      closed-piston design. This design allows for better control of the
      lock-up clutch, which enables controlled converter clutch slip during
      lock-to-lock upshifts that are seamless to the customer.

- Customer fuel economy benefit: Locked converter operation at lower speeds means less wasted heat energy and better fuel economy.

  --  Optimized shift and converter lock-up schedule: After analyzing the
      entire shift schedule, Ford calibration engineers fine-tuned it by
      measuring and optimizing the fuel flow. The system recognizes light or
      heavy throttle use, and puts the transmission in the right gear for
      best performance and efficiency. The entire operating range has been
      optimized to get the best fuel economy by locking up the converter as
      soon as possible and as much as possible.

- Customer fuel economy benefit: Optimizing the shift schedule and lock schedule ensures customers automatically operate in the most efficient gears and save fuel.

  --  Gearing and double-overdrive: The 6R140 transmission has a ratio span
      of about 5.9, which is quite a bit wider than competitors. This wider
      span means the transmission has a deeper first gear that allows
      customers to get the load moving quicker, and a tall overdrive ratio
      for good highway efficiency. While the gearing itself is important,
      the key to overall efficiency is matching that gearing to the correct
      axle. With the diesel engine, up to four axle ratios are available on
      the pickups - 3.31, 3.55, 3.73 and 4.30. Matching up the gearing with
      the right axles means better overall efficiency.

- Customer fuel economy benefit: The double-overdrive gear means even if a customer gets a downshift on the highway, the transmission remains in overdrive. Also, the F-450 pickup went from a 4.88 axle to a 4.30 axle at launch for the 2011 model mated to the wide ratio span of the transmission. This and other optimizations mean the F-450 now has about a 30 percent improvement in fuel economy.

  --  Optimized pumping pressure: A certain amount of pressure is required
      to hold the clutches together so they don't slip. The trick is to have
      the right amount of pressure to do the job. Too much pressure wastes
      fuel. The solution is to optimize the size of the pump and precisely
      control the pressure for all operating conditions.

- Customer fuel economy benefit: At highway speeds, for example, the line pressure is reduced, which helps save fuel. The system maintains the right amount of pressure for any given speed range. The less energy needed for internal pump pressure means less fuel used.

  --  Optimized drainback to reduce spin losses: A main objective is to get
      the fluid through the main barrel to lubricate and cool components,
      and get it back to the sump as quickly as possible. This reduces
      windage and parasitic loss. The clutch friction plates were designed
      to allow fluid to flow through them efficiently for cooling and
      reduced drag. Clutch housings, connecting shells and the main case
      housing were optimized to quickly drain the fluid out of rotating
      components and back into the sump.

- Customer fuel economy benefit: Fewer parasitic losses due to reduced churning of fluid increases fuel economy.

  --  Warmer operating temperature: Tied in with spin losses, the 6R140
      cooling system has been optimized to allow for the proper amount of
      cooling when towing heavy loads in high ambient temperatures, while
      running at an overall higher stabilized temperature. This higher
      stabilized temperature lowers the viscosity and helps the fluid flow
      more easily, which reduces parasitic losses and saves fuel. The fluid
      also warms up faster because it does not flow to the cooling circuit
      until properly warmed up. Faster warm-up also reduces overall
      parasitic losses.

- Customer fuel economy benefit: Fewer parasitic losses due to reduced fluid viscosity translates to less internal drag on the system and increases fuel economy.

Lighter, more efficient than competition

The 6R140 transmission is about 25 pounds lighter than those of competitors. The new engines are lighter than the outgoing products as well, which altogether means much more efficient power flow on a pound-for-pound basis. The 6R140 also has a 150,000-mile fluid change interval, which is 2-1/2 times greater than the outgoing product. A patent-pending high-efficiency dual-media filter is the main reason for the extended maintenance interval, which is another savings for customers.

Cleanest Power Stroke ever

The new 6.7-liter Power Stroke V-8 turbocharged diesel employs an aftertreatment system to help comply with 2010 federal regulations to reduce NOx levels in diesel emissions by more than 80 percent compared with the previous standard. The Ford aftertreatment system is a three-stage process; a key component is the use of Diesel Exhaust Fluid (DEF).

Injection of DEF to reduce NOx is a proven technology that's been used throughout the automotive industry. Unlike other strategies used to control NOx, the DEF system allows the diesel engine to run at its optimum range in terms of fuel mixture. Some systems require the engine to run richer - which can be harmful to diesel engines - in order to control the NOx.

The aftertreatment system works like this:

Step One: Cleaning and Heating - The first step in cleaning the diesel exhaust occurs when the exhaust stream enters the Diesel Oxidation Catalyst (DOC). The role of the DOC is twofold. First, it converts and oxidizes hydrocarbons into water and carbon dioxide. This conversion happens at about 250 degrees Celsius.

Second, the DOC is used to provide and promote heat, using specific engine management strategies, into the exhaust system. Through appropriate thermal management, this heat increases the conversion efficiency of the downstream subsystems in reducing emissions.

Step Two: Knocking Out the NOx - The next step in the process is what's known as Selective Catalytic Reduction (SCR). In this process, the NOx in the exhaust stream is converted into water and inert nitrogen, which is present in the atmosphere and harmless. Before the exhaust gas enters the SCR chamber, it is dosed with DEF, an aqueous solution that is approximately 67.5 percent water and 32.5 percent pure urea.

When heated, the DEF splits into ammonia and carbon dioxide. These molecules are atomized and vaporized, then enter a mixer that resembles a corkscrew. This twist mixer evenly distributes the ammonia within the exhaust flow. The ammonia enters the SCR module, which contains a catalyzed substrate, and through chemical reactions combines and converts the NOx and ammonia into the harmless inert nitrogen and water. Dosing occurs between 200 and 500 degrees Celsius.

Step Three: Scrubbing Away the Soot - The final part of the cleansing system for the diesel exhaust gas involves the Diesel Particulate Filter (DPF). The DPF traps any remaining soot, which is then periodically burned away, known as regenerating, when sensors detect the trap is full. The regeneration process sees temperatures in excess of 600 degrees Celsius to burn away soot.

This industry-proven technology ensures that the new 6.7-liter diesel is the cleanest Power Stroke ever, as well as the most fuel-efficient.

"Having this diesel designed in-house at Ford meant we were able to work on optimizations and refinements right from the start," said Tim Ogilvie, vehicle energy supervisor. "We're able to deliver to customers a more refined, more fuel-efficient Super Duty, with class-leading torque and horsepower and the class-leading capability they demand."

About Ford Motor Company

Ford Motor Company , a global automotive industry leader based in Dearborn, Mich., manufactures or distributes automobiles across six continents. With about 198,000 employees and about 90 plants worldwide, the company's automotive brands include Ford, Lincoln, Mercury and Volvo. The company provides financial services through Ford Motor Credit Company. For more information regarding Ford's products, please visit www.ford.com.

Get complete specifications on these vehicles:

Complete specifications on these and other vehicles are available at the New Car Buyers Guide!

Home | Buyers Guides By Make | New Car Buyers Guide | Used Car Super Search | Total New Car Costs | New Car and Truck Reviews
Automotive News | TACH-TV | Media Library | Discount Auto Parts

Copyright © 1996-2014 The Auto Channel. Contact Information, Credits, and Terms of Use. These following titles and media identification are Trademarks owned by The Auto Channel, LLC and have been in continuous use since 1987 : The Auto Channel, Auto Channel and TACH all have been in continuous use world wide since 1987, in Print, TV, Radio, Home Video, Newsletters, On-line, and other interactive media; all rights are reserved and infringement will be acted upon with force.

Privacy Statement | Size Does Matter | Media Kit | Affiliates

Send your questions, comments, and suggestions to Editor-in-Chief@theautochannel.com.

Submit Company releases or Product News stories to submit@theautochannel.com.
Place copy in body of email, NO attachments please.

To report errors and other problems with this page, please use this form.

Link to this page: http://www.theautochannel.com/

*