Cummins X12 Engine Review

An examination of the Cummins X12 engine
The argument has been under discussion for ages. Does size matter? Well, if you like great performance, power, and a ton of torque, the answer is a resounding no. at least in the area of diesel engines.
The X12 was developed exclusively for cars where the X15 has more power than is needed for the job and applications where weight is a concern. It is now undergoing testing on North American roads and is a staggering 600LBS lighter than other medium bore engines.
You may enhance your payload capacity without compromising even a little performance with the X12 because it is incredibly light, yet it still has a power to weight ratio of 1,700 lbs./ft and can output up to 500 HP.
According to Cummins, and with good reason, the X12 is ideal for expanding markets, regional haul, intermodal, and vocational applications. that it is the "Productivity champion" due to its "industry-leading power-to-weight in performance and transient responsiveness." It is "fuel efficient from idling to interstate" thanks to a low-friction design.
You can anticipate maintenance intervals that are comparable to those of its larger sibling, the X15, because it is a Cummins engine. It can also be utilized in fully automatic, AMT, or manual modes and is compatible with a variety of transmissions.
What inspired the development of the X12? A joint venture between Cummins and the Eaton Corporation, famous for its Powertrain system among other things, was established. Eaton's joint venture with Cummins will "leverage the technical strengths and experience of two industry leaders with long histories and deep industry expertise to provide superior automated transmission technology for our global customers," according to Craig Arnold, chairman and chief executive officer of Eaton.
They have named the company Eaton Cummins, which is owned equally by both parties. Its primary goals are to design, produce, and market medium- and heavy-duty automated transmissions for the commercial market. The end result is the X12.
Mike Taylor, the company's worldwide powertrain manager, has this to say. We believe the X15 will continue to be a significant player in the line haul industry and that huge bore items, which are excellent for coast-to-coast shipping, are not going anywhere. However, we also note that in and around urban areas, there are prospects for regional haul applications. We purposefully pointed the X12 in that direction. We do not regard it as a cannibalization of our X15 product, but rather as the inclusion of a new, improved package that will truly, truly serve this local haul market.
Taylor offered the example of downspeeding to demonstrate why the collaboration between Eaton and Cummins would be successful. Downspeeding occurs when faster axle ratios allow the engine to run at a lower RPM without losing any power to the axle. This is also good for fuel usage.
According to Mike, when you slow down the engine, you have fewer frictional losses and are able to keep it operating at a more fuel-efficient range, needing less fuel. The cooperation of the engine and transmission enables that. However, performance could decrease if you recklessly lower speed. The performance of the vehicles in terms of gradeability, launch, and maneuverability is our responsibility as an engine manufacturer. The interaction between the engine and the transmission is crucial whether you're traveling at 2 mph or 65 mph. Perfect transparency between the two systems results in the engine system and transmission system functioning as one system.
One of Cummins' outstanding traits is that they guarantee that their engines have such a lengthy lifespan that they keep their resale value.
Getting back to Mike
"A second owner may view a truck operation in terms of total cost of ownership from a different angle. All of those elements have an impact on the method we employ to build powertrains. Having this joint venture gives us the chance to develop core technologies while still having control over the controls interface, such as adaptive cruise control and progressive gear changing. All of those things are made possible because of the numerous systems' total openness and transparency because they are tightly connected.
The future of transportation is all about electric, hybrid, and hydrogen vehicles, thus powertrain development is essential in the truck global media. But despite its unfavorable reputation, diesel continues to lead. Mike asked, "Will that change, though?
"Many of the things we've discussed today in relation to automated transmission technology for diesel engines also apply to all-electric and natural gas engines. Simply put, we want to be able to provide the necessary technologies. Some customers who may have applications that fit a pure electric powertrain will undoubtedly be interested in the pure electric alternative, even though it may not be the best choice for other uses. Hey, we're not here to push fully electric; we're here to push diesel, we want to be able to say. We are here to provide you with the most cutting-edge technologies.
These are undoubtedly inspiring words in our constantly evolving planet. He continues...
The business claims that Cummins is uniquely positioned to be able to provide the right solution with the right technology and that it is "really, very thrilled" about where that is leading. "Our understanding of various applications and the connections we have with hundreds or thousands of OEMs."
We share the same ideas, Mike.
Let's examine the specifics:
|
Peak Torque |
1250-1700 lb-ft |
1695-2305 N•m |
|
Governed Speed |
2000 rpm |
|
|
Clutch Engagement Torque |
800 lb-ft |
1085 N•m |
|
Number of Cylinders |
6 |
|
|
System Weight |
2,241 lb |
1,017 kg |
|
Engine (Dry) |
2,050 lb |
930 kg |
|
Aftertreatment System |
191 lb |
87 kg |





