New X10 moves the bus game forward
Cummins shows the pathway to Euro 7
Visitors to Busworld in Brussels had the first glimpse of the new X10 Euro VI, a next-generation internal combustion engine built on Cummins’ 10-litre HELM platform.
The new engine is fully optimised for inter urban bus and coach applications, and tests have shown a 6% to 8% improvement in fuel economy compared to current engines in its class, said Felipe Rocha, general manager On Highway, Europe at Cummins.
With power ratings from 265 to 338 kW (355 - 454 hp) and peak torque at 2,200 Nm, the engine is designed to meet market demand for high power-to-weight ratio products at Euro VI.
The X10 Euro VI offers high power density to allow for improved climbing performance and down-speeding ability. The new single overhead camshaft design and lightweight, modular aftertreatment system enables Euro VI compliance without EGR, for simpler system architecture.
Wastegate turbocharging ducts and impeller blade profiles are optimised for efficiency, which supports the engine’s high fuel economy and torque response. Also featured is the Cummins XPI fuel system with 1,800 bar pressure.
“The X10 Euro VI has been dually designed to provide our inter-urban bus and coach customers with a power dense, high-performance engine as well as a straightforward step toward Euro 7,” said Felipe.
“As OEMs look to update their current vehicle designs, the integration of an X10 Euro VI now makes for a simpler step to X10 Euro 7 in the future. HELM platform commonality ensures the move from current to next-generation engine technology is straightforward, with like-for-like integration points and a similar aftertreatment system across both Euro VI and Euro 7.”
The X10 Euro VI shared the Busworld limelight with the B6.7H hydrogen combustion engine, rated 216 kW (290 hp) and with 1,200 Nm peak torque, and the L9N natural gas engine offering up to 239 kW (320 hp) and 1,356 Nm torque. The L9N can be powered by renewable natural gas (RNG) for further reduction in well-to-wheel carbon emissions.
Also seen at Busworld was the ProTec Independent Front Suspension (IFS) axle from Cummins Drivetrain & Braking Systems. Designed as a drop-in replacement for existing suspensions, it is specifically suited for demanding bus and coach applications.
The IFS improves ride quality, with each wheel moving independently, while refined steering geometry also provides more accurate response and stability, with a steering angle up to 60 degrees. Features such as the high-performance dampers, air springs and anti-roll bars have also been optimised for performance and efficiency in premium coaches and city buses.
“The new Independent Front Suspension can be offered as a complete driveline package with rear axle options – either the latest 17x mechanical or electric ultra-low floor (eULFA) axles,” said Stéphane Janiszewski, regional leader, Europe of Cummins Drivetrain & Braking Systems.
Meanwhile, Accelera by Cummins, the company’s zero-emissions business segment, showcased its eULFA axle, an ultra-low floor electric axle available for zero-emission buses.
X10: Star Performer
- Fuel-agnostic HELM platform
- High power-to-weight ratio
- Simplified EGR-free architecture
- Advanced thermal management
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