A powerful combination of performance, superior total cost of ownership, and future-readiness
The S29’s clean-sheet architecture allowed engineers to develop the platform around the requirements of its intended equipment class rather than adapting an existing engine platform. The team focused on balancing high output and fuel efficiency with the packaging flexibility, durability, and serviceability required in demanding mining environments.
Those priorities are reflected in key features of the all-new S29, including:
High power density: A 29 l engine designed to deliver up to 1300 hp at 2100 rpm, targeting best-in-class power density among competitors.
Fuel efficiency: Best point BSFC targeting 180 g/kWh, with performance projections indicating at least 4% improvement versus the most competitive mining engines in its class.
Fuel‑agnostic capability: Compatible with diesel, unblended paraffinic fuels (EN15940), and biodiesel blends up to B50 today, with design protection to support future operation on gas, hydrogen, or dual-fuel configurations.
Extreme environment ready: ~3000 m altitude capability without derate and cold starts at -25°C without auxiliary preheating.
Advanced reliability and control features: Including the trusted Cummins High-Flow XPI (Extreme Pressure Injection) fuel system and PrevenTech® remote monitoring system to support reliability and lifecycle management.
Regulatory suitability: Designed for unregulated applications and compliant with China Stage III (CSIII) and EPA Tier 2 – equivalent emissions requirements.
An evolved approach to high-horsepower engine development
The innovation behind the S29 extends beyond its architecture and technology. The S29 programme built on Cummins’ established engineering and validation practices while applying them in a more integrated and agile way. Teams connected historical learning, global expertise, physical prototyping, validation, and manufacturing insight earlier in the development process. Highlights of the programme include:
Learning from experience without limiting new thinking: The team reviewed nearly 1000 historical engineering cases, identifying approximately 400 lessons and improvement actions to combine with customer feedback and evolving mining requirements.
Globally connected engineering: A China-based engineering core worked with specialised teams and test facilities across Cummins’ global network, bringing together expertise from different technologies, applications, and regions.
Early physical prototyping: Engineers used representative hardware and additive-manufactured sand cores to test elements of the architecture and produce prototype components before complete V12 hardware and production tooling were available.
Smarter, application-focused validation: Simulation, analytical models, and real mining duty-cycle data were combined with dynamometer and field testing to focus validation on the stresses and durability risks most relevant to mining.
Development connected to manufacturing: Prototype findings were shared with manufacturing teams early, allowing lessons involving machining, foundry processes, and temperature control to inform production planning and ramp-up.
Validation backed by a century of mining experience
Just as important as the engine’s features and the innovation behind its development is the confidence being built through validation. Field testing is already under way in real-world mining operations, with additional engines expected to enter field trials as the programme progresses. For customers, that validation work is central to understanding what the S29 is intended to deliver: reliable performance, superior total cost of ownership, and future-ready flexibility developed around the operating profile of modern mines.
For Cummins, the S29 also extends a broader mining story. Across 100 years of mining experience, the company has continued to evolve alongside the industry, advancing technologies as customer needs and operating expectations have changed. The S29 carries that legacy forward – not simply by introducing a new engine, but by demonstrating how engineering teams can integrate global expertise, local leadership, and rigorous validation to develop future-ready solutions.
Learn more about the all-new S29 at, and read the full feature in the print edition of Global Mining Review for a closer look at the engineering decisions, prototyping methods, and validation work behind Cummins’ newest high-horsepower mining engine.
