View source for Cummins X12 and X15

The '''[[Cummins]] X12 and X15''' is a heavy-duty truck and bus engine. The inline six cylinder diesel engine has a displacement of either 11.9 litres (X12) or 14.9 litres (X15). Cummins launched the new line of engines at a press conference at the Transportation Research Center in July 2016. Cummins began limited production of the X15 at the end of 2016, with full production beginning in January 2017. The X12 will enter production in 2018.<ref>Crissey, Jeff. [http://www.equipmentworld.com/cummins-unveils-x12-x15-engines-for-2017-rebrands-heavy-duty-lineup/ "Cummins unveils X12, X15 engines for 2017, rebrands heavy-duty lineup"]. Equipment World. 25 July 2016.</ref> The X12 and X15 are the successor to the [[Cummins ISX|ISX12]] and [[Cummins ISX|ISX15]].

The X12 and X15 share many heavy-duty components, Cummins Holset VGT® Turbo, XPI fuel system, Electronic Control Module (ECM), and the new Single Module aftertreatment system and ADEPT™ advanced electronic features. The Single Module aftertreatment system combines the Diesel Oxidation Catalyst (DOC), Diesel Particulate Filter (DPF) and Selective Catalytic Reduction (SCR) systems into a single canister. The more compact, lighter emissions control systems, according to Cummins, also boast greater thermal efficiency for improved engine operation.<ref name=brochure>[https://cumminsengines.com/brochure-download.aspx?brochureid=1269 2017 Cummins B6.7 brochure]. 2016. Cummins. Retrieved on 21 December 2016.</ref> 

The engines meet EPA 2016 and GHG 2017 regulations.

Cummins is scheduled to discontinue the X12 engine (as well as the [[Cummins L9|L9]]) with a new engine offering, the [[Cummins X10|X10]], in 2026. The X15 will continue to be available. The new engine will meet the EPA 2027 engine standards.


==Models for Motorcoach==
{| border="1" cellspacing="0" cellpadding="2" class=sortable
!Model
!Max. power
!Max. revs
!Max. torque
!Emmissions certifications
|- align="center"
|X12 410
|410 hp
|2000 rpm
|1450 lb-ft @ 1000 rpm
| EPA 2017
|- align="center"
|X12 455
|455 hp
|2000 rpm
|1550 lb-ft @ 1000 rpm
|EPA 2017
|- align="center"
|X12 455
|455 hp
|2000 rpm
|1700 lb-ft @ 1000 rpm
|EPA 2017
|}


==References==
<references/>

{{Cummins}}
[[Category:Cummins|X]]
[[Category:Diesel engines]]