1 FUEL ECONOMY CREATING OPTIMAL PERFORMANCE DEMAND IT ALL
2 WHAT GOES UP DOESN T ALWAYS COME DOWN. WE KNOW A LITTLE SOMETHING ABOUT FUEL ECONOMY. Detroit has long been recognized as the fuel economy leader in the trucking industry. As emission regulations became tougher with EPA 2004, EPA 2007 and now EPA 2010, our engineers met these regulations while maintaining performance, reliability and most importantly, fuel economy standards. And with the addition of BlueTec emissions technology, Detroit is ensuring its place in the market as the fuel economy leader. LEARN WHERE TO FIND EFFICIENCIES: Controllable Factors Driver Gearing Aerodynamics Maintenance Powertrain Spec You know what we re talking about. Rising fuel prices are constantly in the news, and if you re running one truck or a thousand, those prices are on your mind as well. It might seem out of your control, but there are some things you can do about it. Quite a few, actually. That s because as much as 70% of fuel economy is affected by factors that you can address and correct. So, no matter where you stand today in regard to your fuel economy, you can almost always find areas of improvement. In fact, since fuel and fuel efficiency represent one of the highest operating costs that fleets and owner operators have, tracking fuel economy and taking action to optimize it is critical. As the price of diesel continues to go up, making the most out of every mile becomes even more important for the health of your business. But our commitment to fuel economy doesn t stop with engineering or manufacturing. It continues well past the initial sale to research and testing to help you operate more profitably and efficiently. Understanding the factors that affect fuel economy is critical in helping you achieve the best results. GOOD SPEC + GOOD DRIVING = GREAT FUEL ECONOMY FACTORS AFFECTING FUEL ECONOMY Controllable Semi-controllable Uncontrollable Route/Application, 15% Weather, 15% Semi-Controllable Factors Route/Application Engine Break-In Effect Uncontrollable Factors Weather Environment Driver, 30% Maintenance, 5% BlueTec emissions technology is designed to meet all EPA 2010 emissions standards, and also gives you up to 5% better fuel economy over similarly spec ed EPA 2007 engines. And when you spec a 2010 BlueTec-equipped engine in a truck with improved aerodynamics, the fuel savings are even greater. Find DEF near you. DISCOVERDEF.COM Aerodynamics, 20% Gearing, 15%
3 TOP TEN TIPS TO FUEL ECONOMY: Slow down Keep RPMs low Anticipate hills and traffic Reduce stops Avoid idling Minimize accessory loads Reduce trailer gap Use progressive shifting Stay in top gear Use cruise control USE THE CRUISE CONTROL. When it comes to maintaining speed and efficiency, nothing works better than cruise control. Even small variations in foot pressure on the accelerator pedal can have sizeable effects on efficiency, which is why cruise control can improve fuel economy as much as 6% over manual speed control. To ehance the benefits of using cruise control, the DDEC system on Detroit engines also has a Soft Cruise setting, which reduces the overall fueling required to operate a vehicle in cruise control by delaying full-load torque requests until the vehicle has slowed to a speed slightly less than the set cruise speed. Using Soft Cruise can deliver up to an additional 1% on top of normal cruise control fuel savings. GOOD DRIVERS ARE HARD TO FIND. SO WE LL ALL HAVE TO MAKE A FEW MORE.. We all know how hard it is to find a good driver. But when it comes to maximizing fuel economy, there s nothing more important. After all, optimizing driver habits alone can improve fuel economy by up to 30 percent. To make sure their performance is as good as it can be, take the time to educate drivers on the role reduced highway speeds, shorter idle times and proper gear selection play in improved fuel economy. Or see the top ten tips at left and show them all the ways you can operate more profitably. DON T FORGET THE IDLE. You can do all the right things on the road and still not see big effi ciency gains if you ignore idling. At idle, the engine can burn from one half to over a full gallon every hour depending on idle speed. Not to mention increased wear and tear on the engines. So, if you re going to be there more than fi ve minutes, shut it down. And since today s engines don t need idling time to warm up or cool down except in the most extreme conditions, once you build air pressure, it s time to go. Your bottom line will appreciate it. KEEP THE REVS DOWN. In the heart of every RPM speed band are what we like to call fuel economy sweet spots. By staying in this area, and using the engine s torque instead of its horsepower to do the work, you can easily boost fuel economy. In fact, taking your engine above 1500 RPM wastes fuel without providing any performance benefit, while every 100 RPM reduction in engine speed equals approximately a 2% gain in fuel efficiency. So, be patient when you re pulling a long grade, and always ease into the throttle so you use just enough RPMs to get into the next gear. This is especially true with automated transmissions, where the more the throttle is applied, the higher the engine speed will climb before the transmission will upshift. TOP GEAR. IT S VERY EFFICIENT. It seems like a given, but staying in top gear saves fuel. Because when using top gear, your engine operates at a lower RPM. That means there s less load on the engine, which results in less fuel being used. In other words, if your drivers can get over a hill without downshifting, they shouldn t downshift. That s why we design Detroit engines to pull strong down to 1000 RPM and provide the power to get you over that hill. It just makes financial sense. ANTICIPATE THE ROAD AHEAD. Steady momentum is good, and managing the road allows drivers to be easy on the brakes and the throttle. After all, every time you stop or even slow down it costs you. With a 70,000-pound load, accelerating from a complete stop burns at least one-quarter of a gallon of fuel. So try to make one stop for meals, refueling and breaks. SLOW AND STEADY WINS THE PROFITABILITY RACE. The greater the speed, the greater the aerodynamic forces exerted on a vehicle. This means your engine works harder and uses more fuel. It s also important to consider that fuel consumption increases exponentially as speed increases. For instance, a truck traveling 70 MPH uses much more than twice the fuel as a truck operating at 35 MPH. The chart at right demonstrates the relationship between speed and fuel consumption. For example, throttling back only 5 MPH can result in a fuel savings of up to 10%. To help this, some fleets will program engines to limit the top speed of the vehicle. Additionally, modern engines have several electronic engine parameters that can be programmed to help lower vehicle top speed. This can help the driver develop new driving habits, which ultimately result in better fuel economy. EFFECT OF LOWER SPEEDS ON FUEL ECONOMY Average Speed w/ Excellent Aero w/ Poor Aero 1 mph slower 1% 1.5% 2% 3% 5 mph slower 5% 8% 10% 15% Road Load, HP Air Resistance HP Rolling Resistance HP Vehicle Speed, MPH
4 A GREAT ENGINE IS ONLY PART OF GOOD EFFICIENCY. MEET A TRIO OF HIGH PERFORMERS. STATS 12.8L HP lb-ft STATS 14.8L HP lb-ft STATS 15.6L HP lb-ft Advances in powertrain engineering have led to engines that run quieter, cleaner and more efficiently than any that have come before. Best of all, they re doing it without a loss in power over earlier models. Though selecting a new engine is a great first step, to maximize efficiency, you need to look at your entire powertrain and how it s spec ed for the job you do. GEARING BEST PRACTICES Improvements in fuel economy can be achieved at the expense of performance. Similarly, improvements in performance can be achieved at the expense of fuel economy. Fleets usually favor better fuel economy while owner operators prefer better performance. The best practice, however, is to gear for balanced performance and achieve the greatest fuel economy while retaining the power to get the job done. Your Detroit representative can help you choose the right gearing and the right RPM for your application. PLAN UP FRONT FOR PERFORMANCE DOWN THE ROAD. Developing a good spec is the first step in building any new truck. Be sure to gear vehicles correctly and choose an engine rating that s best for your job at hand. An under-powered truck works harder than it has to, and an over-powered truck produces power it doesn t need. Either way, extra fuel is burned. Also ensure that your transmission and axle ratios are optimized for your application. If you re going to be hauling heavy loads up inclines for short distances, your needs are going to be quite different than those of a long haul tractor. Load factors should also be a primary consideration when spec ing to determine the best power ratings and ratios. For help with correctly spec ing your truck, contact your local Detroit dealer, distributor or representative. Designed specifically for LTL, vocational or regional trucking needs, driving the Detroit DD13 engine means you no longer have to choose between great fuel economy, serviceability and performance. The DD13 provides the longest service intervals in its class, along with easier serviceability, all in a fuel-efficient design that offers a B-50 life of one million miles and up to 5% better fuel-economy than the 2007 version by integrating groundbreaking technologies, such as the Amplified Common Rail Fuel System (ACRS) and an advanced cooling system. We designed the DD15 engine from the The biggest, toughest and most powerful block up with integrated features like an engine we ve ever created, the Detroit Exhaust Gas Recirculation (EGR) system DD16 engine drives like the heavyduty diesel you ve always wanted. A and BlueTec emissions technology to make it one of the most fuel-efficient vocational workhorse made for extreme engine available today. The innovative loads, the DD16 has the power to deliver, design of the Detroit DD15 offers with an amazing torque curve that pulls peak torque response, and the turbo down to 1000 RPM, letting you hang in compounding system that delivers up top gear longer. to 50 bonus horsepower, so you burn It offers a B-50 life of 1.2 million miles, less fuel and get more power, even and with advances like our exclusive fully loaded. Amplified Common Rail Fuel System Compared to the EPA 2007 model, the (ACRS ) and BlueTec emissions EPA 2010 DD15 runs up to 5% more technology, the DD16 produces a miles per gallon with extended service combination of power and efficiency intervals and a B-50 life of 1.2 million that until now has been unheard of. miles. The bottom line: From power to fuel economy, all your performance demands are being met. THE ENGINE BREAK-IN EFFECT As you know, many engines not to mention transmissions and axles require a break-in period of about 25,000 miles. Making fuel economy comparisons prior to the end of this break-in period won t give you accurate information on your effi ciency. Also, putting vehicles into service in colder months will show the poorest cumulative MPG characteristics as a result of seasonal and break-in impacts. If your engine requires break-in, continual evaluations after the proper break-in period will result in the best guide to your effi ciency performance.
5 SMART ENGINES KNOW WHAT IT TAKES TO BE EFFICIENT. When you have a Detroit engine under the hood, you get more than just an engine. Our DDEC electronics system monitors and manages all engine functions for peak performance and efficiency. We ve been building electronically controlled engines since 1985, so we know a thing or two about making them perform their best. With DDEC, there are several options and features available to fleet managers that will help their drivers improve fuel economy. These features will better control engine idling, shifting techniques and aftertreatment management. If you need help to correctly set these engine features, contact your local Detroit dealer, distributor or representative. IDLE SHUTDOWN As we discussed earlier, unnecessary idling wastes fuel and money. It also results in excessive engine wear, additional pollution and can pose a health risk to drivers. All DDEC engines have an option to automatically shut down after a specified period of idle time. Several shutdown modes and overrides can be selected based on your specific needs. AMBIENT AIR TEMPERATURE OVERRIDE This DDEC option allows the shutdown override to be disabled based on the ambient air temperature. By setting upper and lower temperature limits, your fleet manager can control when the driver may override the idle shutdown, allowing continuous idle to maintain comfort in periods of extreme temperatures. OPTIMIZED IDLE The DDEC Optimized Idle feature reduces engine idle time by running the engine only when required. Optimized Idle automatically stops and restarts the engine to accomplish the following: Keep the engine oil temperature between factory set limits F (16 40 C) Keep the battery charged >12.2 V (12 V system) Keep the cab/sleeper of an on-highway truck at the desired temperature (using the optional thermostat) Other benefits include overall reduction in exhaust emissions and noise, and improved starter and engine life by starting a warm engine and eliminating starting aids. Idle Time and Reduction in Fuel Economy Zero Idle Time vs. 10% = 2-3% (with Air Conditioning 1,000 RPM) Zero Idle Time vs. 25% = 3-6% (with Air Conditioning 1,000 RPM) PROGRESSIVE SHIFTING Keeping engine speeds low improves fuel economy. This is also true when accelerating through the gears. This technique is called progressive shifting. All drivers should practice progressive shifting, but with DDEC, fleet management can ensure they do. We created the DDEC Progressive Shifting feature to limit the vehicle s rate of acceleration above the set engine RPM to encourage the driver to upshift into the next gear. And once the vehicle speed has reached the high range, the set engine RPM limit will prevent the driver from making any early downshifts, maximizing the use of top gear. Engine Speed, RPM PROGRESSIVE SHIFT SCHEDULE AUTO-ELEVATE The Diesel Particulate Filter (DPF) is an integral component of the BlueTec aftertreatment system. That s why we ve put measures in place that will protect the DPF for those customers who need to idle for extended periods. With the Auto-Elevate feature enabled, the DDEC monitors the amount of unburned fuel collecting in the DPF and automatically increases engine speed to safely remove it. The result is increased efficiency and maximum system uptime. For all fleets not using Power Take-Offs, we recommend enabling the auto-elevate feature and educating drivers on its operation. Vehicle Speed Limit / Cruising Speed: 65 MPH Peak Torque RPM Zero Idle Time vs. 50% = 7-10% (with Air Conditioning 1,000 RPM) Zero Idle Time vs. 10% = 2-3% (with Engine 700 RPM) Zero Idle Time vs. 25% = 3-6% (with Engine 700 RPM) 400 Zero Idle Time vs. 50% = 7-10% (with Engine 700 RPM) Vehicle Speed, MPH
6 EVERY GOOD RELATIONSHIP NEEDS A LITTLE GIVE AND TAKE. Knowing all the demands placed on today s drivers, it s good to give a little something back to get the best performance. DDEC-controlled engines can help with several features designed to reward drivers with extra road speed for fuel-efficient behavior. These features can be used alone or in combination to design a driver s rewards program that is right for them. Just remember that when you give back some speed to the driver, you ll also be giving back some fuel economy gains. FUEL ECONOMY INCENTIVE The Fuel Economy Incentive (FEI) feature allows fleet managers to establish fuel economy targets, and rewards drivers who exceed the goal with incremental increases in maximum road speed. The more the driver exceeds the target, the more road speed he can earn, up to the chosen maximum MPH. COMMON DRIVER REWARDS The Common Driver Rewards (CDR) feature is similar to the FEI, but uses cruise control usage and/or top gear time as the performance targets for incremental increases in maximum road speed. PASSMART The PasSmart feature gives fleet managers the ability to provide drivers the additional road speed they need to pass other vehicles while still maintaining a fuel-efficient, safe road speed limit. The additional road speed is only available for a limited amount of time and it s up to the driver to use it effectively. THE HIGH COST OF SPEED Nothing has a larger effect on your operational cost than speed. Every 5 MPH costs you about 0.5 MPG and speeding, rapid acceleration and braking can lower your fuel economy by as much as 33% at highway speeds and 5% around town. With 150,000 miles driven, reducing speed 10 MPH can save 2,857 gallons a year. At $4.00 a gallon, that s a savings of $11,428.
7 THE UNSURPASSED STYLE OF MAXIMUM EFFICIENCY. Remove Sun Visor, 1% Driver Training, 10% Aerodynamic Mirrors, 1% Spoiler, 1% Trailer Bull Nose, 3-10% Match Cab and Trailer Height and Width, 10% Trailer Gap, 4% Underhood Air Cleaner, 1-2% Rounded Trailer Corners, 2% Remove Auxiliary Mirrors, 1% Remove Bug Defl ector, 1% Cab Side Extenders, 3% Engine Lubricants, 1% Aero Bumper and Air Dam, 2% Fifth Wheel Height, 2% Tire Alignment and Inflation, 2% Fuel Effi cient Tires and Wheels, 5% Chassis Side Fairings, 3% Axle Lube, 1% Savings are measured individually and are not cumulative. Actual percentages may vary due to external factors and methods of measurement. As your vehicle moves down the road, gravity and wind resistance work in opposition. This is known as drag. While you can t do much about gravity, you can make sure your truck is aerodynamically optimized to reduce drag and increase fuel economy. It s important to note that aerodynamic drag grows exponentially with increased vehicle speed. And while aerodynamics is a factor in every application, it has a greater effect on long-haul applications where trucks are traveling at higher speeds over a longer period of time. That s why the reduction of aerodynamic drag for on-highway vehicles is even more important, as it greatly decreases the energy output required of the engine, resulting in improved fuel economy. MIRRORS Choosing aerodynamically styled mirrors can offer a significant reduction in resistance compared to more traditional mirrors. AIR CLEANERS While external air cleaners look great as a chrome accessory, they don t do much for aerodynamics. Underhood air cleaners offer no wind resistance and generally save time when they need replacement. ROOF FAIRINGS A full roof fairing directs wind up and over the cab and trailer, reducing drag and improving fuel economy performance. TRAILERS By reducing trailer gap and matching the trailer to the cab height and weight, you minimize the areas where wind can cause drag. The results can be very profitable.
8 A WELL-MAINTAINED TRUCK IS A WELL-PERFORMING TRUCK. Maintenance is critical to the long-term performance of your investment. But what many don t realize is this maintenance is also important to the fuel economy performance of your vehicles. Most maintenance pays for itself just in the money saved through better efficiency because by properly maintaining your equipment, you can improve fuel economy and reduce costs. Here you ll find a few of the most important maintenance services you ll need to stay on top of to optimize efficiency. TIRE INFLATION AND WEAR Driving with improperly inflated tires increases rolling resistance and has a significant impact on fuel economy. Every 10psi of under-inflation reduces fuel economy by approximately 1%. Check manufacturer guidelines for tire inflation recommendations to ensure that tires are properly inflated. It s also important that your tire type is matched to your application. Remember that aggressive treads reduce your miles per gallon average, and low profile tires reduce rolling resistance and demand for power from the engine. Additionally, worn tires can have a positive impact on fuel economy. Though be sure to check that tires are not significantly worn, as they could pose dangers for both your drivers and highway travelers in general. AXLE ALIGNMENT Axle alignment is key to optimizing fuel economy. And this holds true whether considering single or tandem axles, steer axles or trailer axles. The importance of axle alignment is not only reflected in miles per gallon, but also in tire wear. For instance, even a ¼-degree misalignment of the front axle, versus a properly aligned axle, will cause a condition known as tire scrub, a lateral force that pushes the tires sideways. Not only does this lead to safety concerns, it also has a negative impact on fuel economy and general vehicle operation. So be sure to monitor axle alignment and adjust when necessary to maximize the fuel economy and safety of your vehicle. AIR CONDITIONING COMPRESSOR OPERATION AND FAN-ON TIME About 50% of total fan-on time can be attributed to the air conditioning compressor. The more time you operate your vehicle with the fan on and the air conditioning compressor running, the more power you ll need from the engine, and the less power the engine has to move the load. This means that the engine has to work harder to move the load, consuming more fuel in the process. LUBRICANTS Maintaining lubricants is extremely important for the functionality and efficiency of an engine. And using synthetic lubricants takes this functionality and efficiency to another level. That s because synthetic lubricants are specifically manufactured for superior temperature stability and improved viscosity at low temperatures, reducing pumping and spin power losses. Which, you guessed it, improves fuel economy. OTHER MAINTENANCE REQUIREMENTS Be sure to check your manufacturer guidelines for general maintenance recommendations. The following is a partial list of other important items to look out for during your maintenance procedure: Air Leaks Fluid Leaks EGR Leaks Brake Wear Belt Condition Coolant Filter Life Coolant Level Fuel Filter Life Oil Filter Life Oil Level Overhead Adjustment Percentage of Tire Wear Increase in Fuel Economy 30% 2% 50% 6% 80% 6.6% With the Detroit Amplifi ed Common Rail Fuel System (ACRS), we ve cut emissions without the drain on fuel mileage or power. The amplifi ed in ACRS means that full injection pressure capability is achieved by amplifying PMS 2915 C63 M7 Y0 K0 engine fuel rail pressure internally in the injector. With ACRS, the engine s electronically optimized fuel delivery actually perfects the pressure, the timing and the spray for every injection, to every cylinder, every second the engine is performing. This not only increases effi ciency, it also reduces deposits like soot and carbon, resulting in fewer aftertreatment device (ATD) regenerations.
9 DEMANDDETROIT.COM DETROIT SUPPORT. ANYWHERE. Unmatched parts availability Factory-certified technicians Live technical support More than 800 authorized service outlets in North America DDC-EMC-BRO Specifications are subject to change without notice. Detroit Diesel Corporation is registered to ISO 9001:2008. Copyright Detroit Diesel Corporation. All rights reserved. Detroit Diesel Corporation is a Daimler company. FPO
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Contents Introduction...2 Using Your Jacobs Engine Brake... 3 The Controls... 3 Jacobs Engine Brake Operation... 4 Driving with Your Jacobs Engine Brake... 7 Flat, Dry Pavement... 7 Descending a Grade...
The Truck You Always Wanted Which one is the Glider? IT S HARD TO TELL Rolling down the road, it s difficult to spot any differences between a Freightliner Glider and a new Freightliner truck. A Glider
BUYING A USED CAR VOCABULARY and DEFINITIONS Anti-lock brakes: Brakes that won t lock up, a computer in the car pumps the brakes on and off so the car will not skid. As Is: Buyer beware, the car is sold
core values values values that drive success Welcome to the very core of our company. What is most important to us? What do we stand for as a company? Are we good stewards of the environment? Do we put
3 basic driving skills This chapter includes information on basic skills, driving in traffic and vehicle and personal safety. What you ll learn After studying this chapter you ll be able to: describe various
UDOT RPMS VEHICLE RECORDS, PREVENTIVE MAINTENANCE & SURVEILLANCE VEHICLE RECORDS AND PREVENTIVE MAINTENANCE Prepared by: UTAH DEPARTMENT OF TRANSPORTATION OFFICE OF PLANNING AND PROGRAMMING IN COOPERATION
Submitted by United States of America Informal document WP.29-155-11 (155 th WP.29, 15-18 November 2011, agenda item 14) United States of America Environmental Protection Agency and National Highway Traffic
Nissan Figaro - Fuel Consumption First of all what sort of fuel consumption should you achieve in a Figaro?... A realistic overall figure is 32 35 MPG but there are, of course, many factors that will influence
Wynn s Extended Care Every car deserves to receive the very best care... especially yours. How Do You Keep Your Reliable Transportation Reliable? Count on Wynn s Because Wynn s has been caring for cars
GREENHOUSE GAS MANAGEMENT FOR MEDIUM-DUTY TRUCK FLEETS A Framework for Improving Efficiency and Reducing Emissions automotive fleet & leasing association white paper series volume 25 Greenhouse Gas Management