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EMD 12V1010J

To meet EPA Tier 4 emission standards for nitrogen oxides (NOx), manufacturers rely on one of two methods: exhaust gas recirculation (EGR), where exhaust gases are cooled and recirculated back through the combustion cycle, or selective catalytic reduction (SCR) using urea-based diesel exhaust fluid, which converts NOx in the catalytic converter to elemental nitrogen and water. Although EGR requires a diesel particulate filter, it is the preferred solution for Class I operators, as SCR adds another consumable with handling and storage issues by maintenance personnel.

The four-stroke engine design was re-introduced in the mid 2010s to meet Tier 4 without using SCR. Although EMD had experimented with modifying the 710 to meet Tier 4, the prototype proved to be too heavy and inefficient to be practical. The first (pre-production) locomotive using the 1010J engine, the SD70ACe-T4, using a 4,600 horsepower (3,400 kW) (4,400 traction hp) 12 cylinder engine was unveiled in late 2015. Testing of the new locomotives began in the Spring of 2016. The first two units of a 65 unit order for the new locomotive were delivered to Union Pacific in December 2016.

The block designation was changed to J to reflect the changes to the new engine, which included power assembly and block redesigns, as well as the addition of a two-stage turbocharging system consisting of three turbochargers. Other new features are an EGR system to reduce exhaust emissions and double-walled fuel injection to increase safety.



Installation is simple, remove the temporary red fuel tank and exhaust ports, and send fuel to the pipe on the lower rear of the engine, then reroute your throttle logic and pump controls in the same way the temporary controls on the left side do. And as this has no cooling built in, you will have to add that yourself.



Being a large engine, this has some power. Its operating range is 200-1000 RPM.
(but of course, overloading the engine can make it not be able to hit that target or start)



Enzokatz for the thumbnail
Olli for the ECU

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