Cummins used its ConExpo to showcase a new fuel-agnostic 15l engine platform which can be adapted for hydrogen, natural gas and advanced diesel engines “offering low-to-zero carbon fuel capability.”
The next generation engine is designed to accelerate the decarbonization of heavy-duty off-highway applications, added the firm.
“Cummins’ all-new platform takes internal combustion to a new level, capable of meeting future ultra-low emission standards, such as EPA Tier 5 and EU Stage 6, together with a low-to-zero carbon fuel capability to help put construction and quarrying sites on a lower cost path to decarbonisation,” explained Antonio Leitao, VP Global Off-highway Engine Business.
According to Cummins, the new engine is a clean sheet design that points to the future of diesel: more capability with less environmental impact: “Its high power density sets the standards for heavy-duty performance in key off-road applications including excavators, wheel loaders, drilling rigs, road planning, milling machines, haul trucks and air compressors. Innovatively designed hardware provides lower weight with maximum engine durability, even when working on the most challenging jobs.”
The fuel-agnostic architecture of the 15-litre platform takes a common base engine with cylinder heads and fuel systems specifically tailored for it to use carbon-free hydrogen or biogas with up to a 90 percent carbon reduction.
Using hydrogen the engine outputs at 530 hp (395 kW) and natural gas up to 510 hp (380 kW).
As you would expect the advanced diesel version takes the ratings up a notch to 650 hp (485 kW) and can use either sustainable HVO fuel or biodiesel in off-highway duty-cycles.
“The 15l has a significant increase in power density with a more compact installation envelope providing equipment manufacturers with the capability to do more with their machines,” added Leitao.
A key design feature of the new platform is a Double-Overhead-Camshaft (DOHC) realizing significant advances in combustion and thermal efficiency. Friction losses across the engine design have also been reduced and a sculpted block contributes to weight saving. The DOHC design also enables a more efficient integral engine brake to be accommodated.
The 15-liter hydrogen engine with direct-injection, lean-burn combustion will be available with ratings from 400-to-530 hp (298-395 kW) and a peak torque of 2600 Nm. Running on zero-carbon green hydrogen, it can use a 700-bar pressure high-capacity fuel storage system for maximum operating hours between refueling.
The 15-liter advanced diesel features Cummins latest XPI ultra-high pressure fuel injection system and will offer a broad power range of 450-to-675 hp (335-503 kW) with an impressive 3000 Nm peak torque. Using B100 biodiesel enables up to a 70 percent reduction in carbon and using HVO renewable fuel achieves up to a 90 percent reduction.
For applications powered by renewable biogas, the 15-liter natural gas will offer ratings extending from 400-to-510 hp (298-380 kW) with a peak torque of 2500 Nm available. Very low noise is a further benefit of this engine, particularly for when operating in urban areas.
“Moving forward, our aim is to offer the same agnostic capability across the next-generation of our current 6.7 liter and 9 liter engine platforms,” concluded Leitao.