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Cummins unveiled the highly anticipated Cummins S29 mining engine at an event held at the Chongqing Cummins Engine Plant in Chongqing, China.
“Today, we’re not just introducing a new engine — we’re setting a new benchmark for mining power,” said Jenny Bush, Cummins vice president and president, Power Systems. “The Cummins S29 brings together innovations in fuel economy, reliability and power density to deliver exceptional performance, exceptional total cost of ownership and the flexibility to adapt as mining operations evolve.”
The S29 is designed for 90- to 120-ton haul trucks and 150- to 220-ton excavators, with additional applicability across a wider range of mining and industrial equipment, including surface miners, bulldozers, wheel loaders and dewatering pumps. It delivers a competitive power density, with output of up to 1,300 horsepower at 2,100 rpm. This enables maximum vehicle integration flexibility, delivering the power and performance of higher-displacement engines in a compact installation package.
Cummins said fuel efficiency was a key consideration in developing the S29. Based on current development targets, the S29 is expected to achieve best-point brake-specific fuel consumption (BSFC) of 180 grams per kilowatt-hour, representing industry-leading fuel economy for its power range and positively impacting the engine’s operational costs. Another standout feature is the engine’s fuel-agnostic capability, helping customers support evolving fuel strategies.
At launch, the S29 engine is planned to be compatible with diesel and unblended paraffinic fuels (EN15940), such as HVO and biodiesel blends up to B50. The platform is also being designed to support potential future natural gas, hydrogen or dual-fuel configurations.
The engine is planned to be available globally in regions that require China Stage III (EPA Tier 2 Equivalent) and non-certified emissions configurations, in late 2027.
Source: Cummins
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