Diesel Engines

Detroit Diesel Corporation is a subsidiary of Daimler Trucks North America LLC with its headquarters in Michigan. It is a leading manufacturer of diesel and alternative-fuel engines for commercial hauling purposes in trucks, coaches, buses, and commercial marine craft. Detroit diesel engines are distributed in more than 130 authorized dealers across 88 countries.

Early beginnings

The history of Detroit Diesel Corporation—which was re-branded as simply “Detroit” in 2012—can be traced to 1938, when General Motors (GM) established GM Diesel, the foundation of Detroit as it exists today. GM first experimented with the diesel engine in one of its assembly line reconstructions for the 1933 Chicago’s World Fair. When demonstration runs suggested the potential of diesel-powered locomotives in cutting down running times, GM set up a dedicated diesel engine division to research and develop diesel engines for industrial and marine use. Its first model—the lightweight, two-cycle Series 71—was used in landing craft, tanks, and road construction equipment for World War II.

The 50s and 60s

Despite the railroad’s dwindling importance after the war, GM Diesel picked up more momentum and explored opportunities in the highway truck market. The division developed heavy-duty engines, expanded its client base, and set up a worldwide distribution of authorized dealers and distributors. In 1957, the Series 53 was added to the product range. GM Diesel was renamed as the Detroit Engine Division in 1965. In 1970, GM consolidated its Detroit diesel engine and Allison transmission and gas turbine divisions to form the Detroit Allison Division.

70s – 90s

Detroit Allison continued to enjoy robust sales even through the auto industry recession in the 70s. By the time the 80s hit, it had commanded 30 per cent of the diesel engine market despite facing stiff competition from market leader Cummins. In 1987, the company introduced the four-cycle, heavy-duty Series 60 engine with integrated electronics as a standard feature. Its clean and fuel-efficient design quickly made it the best-selling diesel engine in the domestic Class 8 truck market.

In 1988, GM entered into a joint venture with Penske Corporation, owned by famous auto racer and business magnate Roger Penske to create the Detroit Diesel Corporation. Under Penske, who retained 80 per cent ownership in the venture, the company’s revenue and market share soared. However, heavy R&D investments combined with a depressed economy lowered profit margins significantly in 1990 and 1991. The company bounced back in 1993 with a net income of more than $20 million. In the same year, Detroit Diesel Corporation became a publicly traded company on NYSE under the ticker symbol “DDC.”

Achievements in the millennium

In 2000, Detroit Diesel Corporation was acquired by DaimlerChrysler and incorporated under a new business division known as DaimlerChrysler Powersystems with an employee count of over 34,000 and almost $7 billion in revenue. Five years later, Detroit Diesel Corporation invested $350 million to revamp its plant and in 2007, the company launched its DD engine platform, with the DD15 engine winning the Truck Writers of North America Technical Achievement Award.

The  year 2009 marked one million sales of the Series 60 engine, which is recognized the world over for its excellent performance and fuel efficiency advantages. The following year, Detroit Diesel Corporation launched its BlueTec® emissions technology with advanced NOx-reducing capabilities, as well as the DD13, DD15, and DD16 engine line-up. The company was named one of the two 2011 Michigan Green Leaders by the Detroit Free Press in recognition of its sustainable development, innovation, and conservation initiatives.

Detroit diesel engines continue serving long-haul, off-road, and general transportation needs impeccably through their technology-forward thinking. The company developed the first-of-its-kind Remote Diagnostic System—the Virtual Technician—offering real-time vehicle system analysis via remote telemetric vehicle tracking systems. Its more recent launch of Detroit™ genuine parts has also helped customers retain value over the life of their vehicles.

With a long and successful history in engine building, Detroit Diesel knows what works in designing powerful truck solutions. The Detroit Diesel DD13 packs a fuel-efficient punch. With muscle that extends to 470 horsepower, the DD13 is versatile enough for a range of applications while retaining the type of fuel economy that’s become more important than ever to the long, continuous hauls of the modern fleet.

By incorporating BlueTec emissions technology, trucks using this engine can run for longer and keep the air cleaner while doing so. Advanced cooling systems also reduce fan time, which is another factor that lowers fuel consumption.

Reliability is just as important, and the DD13 utilizes several cutting edge technologies to perform efficiently. This reduces wear over time and allows the engine to do its job with fewer maintenance stops. The Amplified Common Rail System (ACRS) optimizes the injection process for smooth acceleration and less vibration. The reduced friction and vibration mean less wear on parts over time as well as a quieter engine during operation.

The DD13’s Torque Response

The Detroit Diesel engineers designed the DD13 with a flat torque curve, meaning smoother acceleration so the driver needs to shift less often. It can be tedious as well as fatiguing to do that much shifting. Every aspect of the DD13 is built for ease of use and efficiency, as the engineers know that a smooth ride is just as important as power and efficiency.

The torque range of this engine is 1,250 lb-ft @ 1,100 RPM to 1650 lb-ft @ 1,100 RPM, with horsepower ranges from 370 to 470, respectively. From cruising out onto the highway to navigating a construction site, drivers will have what it takes to get the job done for the many hours of a long working day. One of the most versatile engines in the Detroit line-up, the DD13 can be found in more Freightliner trucks for sale today than any other Detroit engine. These include the following:

Easier Maintenance and Lower Operating Costs

Your fleet is only profitable when tires are on the road. Trucks using the DD13 can go 50,000 miles between oil draining and filter changes, which is the longest scheduled maintenance interval in its class. The savings from stopping less often for maintenance adds up over the life of each truck in your fleet and can go a long way toward improving your bottom line.

If your fleet contains a variety of trucks with different engines, you’ll be pleased to know that the DD13 shares 65% of the service procedures and parts with the DD15. This makes parts easier to find, and if your outfit keeps parts and maintenance items on hand, they will be useful for multiple trucks.

Contact us today for more information about Detroit Diesel engines and how they can improve the performance and efficiency of your fleet.

Detroit Diesel’s DD15 engine delivers a lot of power in a lighter weight package than ever before. This new evolution of efficient trucking is a labor of ongoing improvement, making for stronger fleets across America.

Modern innovations include the addition of the Jacobs engine brake, Exhaust Gas Recirculation systems (EGR), and BlueTec emissions technology for more fuel-efficient, lower-maintenance engines. Detroit’s long history of solid and powerful engines is something Freightliner is proud to showcase in several of our semi truck offerings.

The DD15 Delivers

Beyond the advancements present in all Detroit diesel engines, the DD15 features a few additional and notable items.

Fuel Filter Module – A two-tier system provides longer service life, even up to 50,000 miles.
Variable Speed Water Pump – Using a viscous clutch between pulley and impeller drive, greater efficiency is achieved throughout.
Detroit Virtual Technician – Onboard diagnostic systems can help alert you to issues as they arise and can notify you of the part needed to repair it, as well as how serious the fault is. Best yet, the software can help you find the next available service bay and even schedule the repair appointment.
• Proprietary Asymmetric Turbocharger – Reduces weight and utilizes a simpler design that is better matched to the EGR system for improved performance.

Power and Efficiency With the DD15

Freightliner Cascadia Evolution, Detroit diesel engineers have expertly crafted drive trains that blend power and efficiency into rock solid engines. Fuel economy is maximized at 65mph with an RPM of 1350. Perfect for long hauls, the engine settles in and allows for larger spans of continuous driving between stops. This can help improve delivery times and ensure deadlines are met.

Because these engine refinements are also created to reduce maintenance needs, your fleet can remain more active. More time on the road and out of a repair shop means more profits for your operation.

Contact us for more information about our Detroit Diesel DD15 engine!

The Detroit Diesel DD5 is a more efficient medium-duty engine than ever before. With a four cylinder engine that has held even with six cylinder models in its class, the DD5 aims to further decrease the cost of ownership for any truck it’s equipped within.

The new technology behind this engine allows for longer maintenance intervals. Trucks tested with the DD5 were able to safely drive 45,000 miles between oil changes, and the DD5 has a B10 lifespan of 400,000 miles.

“We are excited to unveil the DD5 here at the NTEA Work Truck Show and offer customers their first look at what is a proud new addition to the Detroit engines lineup,”  said Kary Schaefer, general manager marketing and strategy, Daimler Trucks North America. “We fully expect that as customers come to realize the total cost advantage of running these reliable and efficient DD5 engines in their fleets, they will Demand Detroit as the engine of choice as they have with the heavy duty DD13, DD15, and DD16 engines.”

The DD5 also has these features:

• An advanced, high-pressure common rail fuel system
• An optional high-performance integrated engine brake
• A variable-speed fan and advanced cooling system providing shorter fan-on times for increased fuel efficiency
• A B10 life of 400,000 miles
• Simple, fixed-geometry, dual-stage turbo for performance, efficiency, and reliability
• A robust rear gear train
• Variable cam-phasing technology for efficient after-treatment system performance
• The Detroit™ Connect Virtual Technicianâ„  remote diagnostic system to maximize uptime
• 2017 Greenhouse Gas (GHG17) and 2016 OBD (OBD16) compliance

The DD5 is available primarily in the M2 106 model of Freightliner truck. This blend of power and efficiency is ideal for municipal uses, from fire and emergency service to government work and construction tasks.

Cummins designs and manufactures all components found within their engines. Built for all applications with models ranging up to 600 horsepower, the Cummins series diesel engines feature the following technologies:

•  Cooled EGR (Exhaust Gas Recirculation) technology helps regulate temperatures to reduce emissions and improve fuel economy for all-day performance.
•  Cummins Aftertreatment System minimizes tiny particles that build up during engine use, increasing performance and reliability while continuing to meet emissions requirements.
•  Near-Zero Emissions results from the aftertreatment system working alongside the EGR and Selective Catalytic Reduction (SCR) technology for the cleanest operation to date.

Our Cummins engines offered include the following:

Visit the Cummins website to learn more about Cummins Diesel Engines.

The Cummins ISB6.7 is the most flexible option in the lineup. With a horsepower range of 200-325, the ISB6.7 is the perfect all-arounder for typical jobs.

Best in class for reliable uptime, this engine balances performance with high fuel economy for a clear improvement in any fleet’s bottom line. For jobs ranging from deliveries to dump trucks, the ISB6.7 packs big results.

But how does all that reliable power work in such a flexible design? Much of that lies in the first-rate engine technology Cummins engines are manufactured with.

Engine Technology in the Cummins ISB6.7

VGT™ Turbocharger –The Cummins VGT Turbocharger is both simple and precise. Electric actuation allows infinite adjustment, providing the exact amount of boost necessary for superior response. The proven sliding-nozzle design has best-in-class reliability and durability.

Lowest Cost of Operation – You can rely on the Cummins ISB6.7 to keep operating budgets in line with reduced maintenance, long service intervals, and the best fuel efficiency of any engine in its class.

HPCR Fuel System – The HPCR fuel system delivers a precise mixture of fuel and air at a constant pressure, regardless of engine rpm. This flexibility in injection timing allows multiple injection events per cycle, which maximizes fuel economy and performance while decreasing noise and exhaust emissions.

Cooled EGR – This next-generation system lowers combustion temperatures for reduced emissions and optimized fuel economy.

Fully Integrated Electronic Controls – A single higher-capacity Electronic Control Module (ECM) controls everything from air intake to exhaust aftertreatment for peak performance and near-zero emissions.

aftertreatment systemCummins Aftertreatment System – The proven Cummins Particulate Filter reduces particulate matter by over 90%. In 2010, it is combined with Cummins SCR to meet emissions standards while maintaining best-in-class performance, reliability, and durability. Cummins SCR technology has been proven in over 200,000 European vehicles and uses Diesel Exhaust Fluid (DEF) to achieve NOx emissions at near-zero levels.

Cummins ISB6.7 Engine Availability

The ISB6.7 is available for the Freightliner M2 106108SD, and M2 106 Hybrid semi truck models.

Visit the Cummins website to learn more about Cummins Diesel Engines.

The Cummins ISL9 is the bigger brother of the ISB6.7. When a range of options is still desirable but you need a bit more power to get the job done, this engine delivers with a range of 345-380 horsepower.

Found in medium and heavy duty semi trucks, the ISL9 is a solid contender for heavier delivery jobs, dump trucks, and municipal uses. Several models of our Freightliner trucks can be equipped with this engine.

Engine Technology Within the Cummins ISL9

XPI Fuel System – The proven technology of the XPI common-rail fuel system delivers a precise quantity of fuel at ultra-high pressures. This, together with more robust electronic engine controls, enables multiple injection events per cycle. Flexibility in injection timing maximizes fuel economy and performance while decreasing exhaust emissions.

Heavy-Duty Design – Rugged features include replaceable wet liners, roller followers, by-pass oil filtration, and targeted piston cooling for longer service in the toughest work environments.

VGT™ Turbocharger – The Cummins VGT Turbocharger is both simple and precise. Electric actuation allows infinite adjustment, providing the exact amount of boost necessary for superior response. The proven sliding-nozzle design has best-in-class reliability and durability.

Cooled EGR – This next-generation system lowers combustion temperatures for reduced emissions and optimized fuel economy.

Fully Integrated Electronic Controls – A single higher-capacity ECM controls everything from air intake to exhaust aftertreatment for peak performance and near-zero emissions.

Cummins Aftertreatment System – The proven Cummins Particulate Filter reduces particulate matter by over 90%. In 2010, it is combined with Cummins SCR to meet emissions standards while maintaining best-in-class performance, reliability, and durability. Cummins SCR technology has been proven in over 200,000 European vehicles and uses Diesel Exhaust Fluid (DEF) to achieve NOx emissions at near-zero levels.

The ISL9 Availability

The Cummins ISL9 Engine is available in the following Freightliner semi truck models:

Visit the Cummins website to learn more about Cummins Diesel Engines.

The Cummins ISX12 diesel engine is a powerhouse, boasting up to 425 horsepower. This significant amount of power makes this an ideal engine for all heavy-duty trucking jobs from dump trucks to municipal uses.

To build on the success of the ISX12, Cummins refined the engine’s technology to deliver better fuel economy while meeting 2014 U.S. Environmental Protection Agency (EPA) greenhouse gas (GHG) emissions standards and U.S. Department of Transportation (DOT) fuel efficiency standards a full year ahead of schedule.


A reduction in parasitic losses with a higher efficiency water pump and fuel pump, optimized combustion, and fewer active after-treatment regenerations add up to better fuel economy. Lowering fuel use results in less carbon dioxide (CO2) emissions (the main GHG being regulated), so achieving better fuel economy actually meets both standards.

Cummins’ proven On-Board Diagnostics system has been used in thousands of on-road vehicles since 2007. This system continuously monitors performance of the emissions system providing alerts via a Malfunction Indicator Lamp (MIL) on the instrument panel. The MIL illuminates when it detects a malfunction related to the emissions control system, alerting the operator that the engine needs troubleshooting and possible repair.

Built to last longer maintenance cycles, the ISX12 saves on costs of ownership with oil change cycles up to 15,000 to 35,000 miles.

The Cummins ISX12 is available in the flagship semi truck, the Freightliner Cascadia.

Visit the Cummins website to learn more about Cummins Diesel Engines.

Loaded in the traditional Cascadia models as an available engine option, the Cummins ISX15 packs the 6-cylinder power and features for the toughest jobs. So much so, in fact, that it’s been the only heavy-duty engine offered by every class 8 semi truck in the country.

In demanding, heavy-haul environments, Cummins ISX15 engine pulls heavy loads (over 70,000 lb GVW) more efficiently than medium-bore (11- to 13-liter) engines, which work harder and shift gears more often.

This beefy engine sports a horsepower range of 400-600, as well as a massive 2050 lb-ft. of torque. The engine also features Smart Shift technology, which allows up to an additional 200 lb-ft of torque in top gears to help trucks make it up steep inclines. For the types of loads class 8 trucks carry, this is a particularly useful feature for fewer downshifts. The Cummins PowerSpec also allows operators to customize the shift patterns for optimal highway driving.

ISX15 high-output engine ratings have been designed to provide the driver with prolonged peak torque for a broad power band. This provides an ample rpm operating range to climb mountains or haul heavy loads with ease and less gear shifting. Only Cummins ISX15 delivers performance that the driver can depend on.

Low-end performance is exceptionally strong, as it runs from 1150 rpm to 1500 rpm at the full 1850 lb-ft of peak torque. This increased performance provides the driver with improved driveability over a wider operating range and superior performance at high altitudes.

Fewer repairs mean less time in the shop; less frequent dash light warnings mean fewer stops for troubleshooting; faster diagnostics speed up repairs.

Hardware Enhancements:

• NOx sensor with improved moisture protection.
• Effective lubrication and protection with enhanced oil bypass valve.
• Turbo actuator improvements increase responsiveness.
• EGR cooler has improved thermal fatigue resistance.
• More robust SCR catalyst.
• Ammonia sensor eliminated.
• Power cylinder and piston ring design modifications substantially reduce oil consumption.
• Thermal recirculation valve to combat fuel gelling (optional)
• Streamlined Diagnostics and Software
• Engine dash light notifications reduced by 65%
• Simplified logic for DEF level notifications
• Updated software performs more accurate diagnostics
• Connected Diagnostics employ telematics for quick diagnosis

Cummins Engine Warranty

Base engine warranty coverage for the ISX15 includes parts and labor on warrantable failures for both the engine and after-treatment system with no deductible. Extended Coverage Plans are available for the base engine with options for up to 7 years or 500,000 miles (804,672 km). Extended coverage plans are also available for the after-treatment system and major components. Check with your Cummins distributor or dealer for details.

Visit the Cummins website to learn more about Cummins Diesel Engines.

The Cummins X15 is the most efficient engine in its class ever created. Using the biggest, toughest parts in the industry, the X15 is ready for any job and can still keep costs low for fleets. The new 2017 Freightliner Cascadia makes use of this powerhouse, and it delivers.

It began as a innovative platform, complete with dual overhead cams, exceptionally strong engine braking, and an even tougher head and block for unrivaled dependability. Customers took notice, quickly making the Cummins ISX15 the best-selling engine in its category, by far.

The X15 is optimized to deliver more power than alternative after-treatment systems, with 400 hp to 500 hp and 1450-1850 lb-ft of peak torque. But what’s really impressive is what happens when you crest the hill and take your foot off the accelerator. That’s when the most powerful engine brake in the industry kicks in, and you just ease on down the road. You get over 400 braking horsepower (bhp) at just 1300 rpm.

When the X15 pulls on the reins, you can go light on the brake pedal—saving wear and tear on your service brakes while staying in total control.

The X15’s Innovative, Efficient Parts Technology

Virtually every critical component has been scrutinized, modified, upgraded, and improved. All that makes the 2017 X15 a completely reinvented platform that delivers the best performance and dependability in the industry. Dynamic electronic features, the high-efficiency VGT® Turbo, and an optimized combustion formula have resulted in a significant increase in fuel efficiency and throttle response.

The integrated Single Module after-treatment system dramatically increases cleaning intervals while saving weight and space. We’ve combined the best available components with our advanced engine controls into one fully integrated powertrain package that is so efficient that it is redefining the heavy-duty trucking industry.

Taking advantage of the big-bore architecture, the X15 manages the combustion cycle to achieve the highest compression ratio in the industry, and improve thermal efficiency. The X15 is able to leverage the technology through the application of our proprietary VGT Turbo and XPI fuel system. The integration of these technologies provides superior efficiency and crisp response to driver command. In essence, the X15 breathes like a medium-bore engine, but delivers big-bore performance. Cummins continues its legacy of innovation by becoming the first to introduce this combustion technology to the commercial truck market.

SmartCoast Technology

SmartCoast improves efficiency while coasting. On moderate downhill grades, the transmission will keep the clutch engaged while shifting out of gear, allowing the engine to return to idle and reducing drag on the vehicle. That conserves vehicle momentum and improves fuel economy.

The transmission automatically shifts into the correct gear at the exact moment that power is needed to maintain road speed whether you need acceleration or engine braking. SmartCoast alone improves a truck’s fuel economy by 2 percent. An additional feature that works with SmartCoast is Predictive Cruise Control (PCC). Using Global Positioning System (GPS) technology, it previews the road ahead and modifies both the fueling rate and road speed limit to take advantage of vehicle momentum with such precision that you’ll gain an extra 1 percent in fuel efficiency.

Every X15 Efficiency Series engine will leave the Cummins factory with PCC installed and enabled. Advanced technology such as SmartTorque2, SmartCoast, and PCC make the X15 the most fuel-efficient engine in the industry.

Shop our new trucks inventory to find class 8 semi trucks equipped with Cummins engines!

Visit the Cummins website to learn more about Cummins Diesel Engines.

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