Heavy Equipment

Cummins Unveils New CS IV Engines for China Market

The new generation engines range from 48-674 hp (36-503 kW).

Updated on

January 17, 2023

Cummins CS IV engine — An advanced Cummins engine. (Photo: Courtesy)

Cummins Inc. has unveiled a new generation of off-road engines that meet the stringent China National Stage IV emissions (CS IV) standards that came into force on December 1, 2022.

Rated from 2.8 to 15 litres, the engines have displacements from 48-674 hp. The products will be formulated to deliver higher power output and torque than their predecessors.

As part of the advancement, Cummins has unveiled three CS IV PLUS engines: M15 Plus, L9 Plus, and F4.5 Plus, which are ideal for the toughest rounds of duty.

The new engines will deliver “market-leading CS IV power, with faster response and smarter system integration capability, helping operators reduce running costs and environmental impact,” the company said in a statement.

The M15 Plus offers advanced features and customised ratings for main applications including wheel loaders, air compressors, excavators, agricultural equipment, and milling machines with power ratings from 563 to 675 hp (420 to 503 kW) and peak torque up to a significant 3,000 Nm.

“This clean sheet design product points to the future of diesel, more capability with less environmental impact. Its high-power density sets the standards for heavy-duty performance in off-road applications,” Cummins said.

Engine durability

The engine’s creatively designed hardware provides lower weight with maximum engine durability, even when working under the most challenging environments.

On its part, the new CS IV-compliant Cummins L9 Plus engines offer a whole new level of power and versatility with a proven design derived from millions of L Series engines that are operational across the world.

“With ratings from 293-394 hp (219-294 kW) and a torque rise of up to 16% at 1800 N∙m, L9 Plus engines are perfectly matched to a wide range of machinery such as excavators, wheel loaders, drills, [and] air compressors.”

On the other hand, the new 4-cylinder F4.5 Plus at 173 hp (129 kW) is suitable for excavators, with a design that is based on the highly popular F Series engines.

Fuel consumption

Designed to deliver up to 20% more power compared to its CS III predecessor, the F4.5 Plus features a unique twin-turbocharging for lower fuel consumption, faster transient response, and strong performance especially at high altitudes.

In 2020, Beijing updated the China IV emission standards for non-road mobile machinery – setting new guidelines for particle number (PN) limits, the use of Global Positioning System (GPS) tracking systems, and portable emissions measurement system (PEMS) testing for improved real-world compliance.

The new standards, which took effect last month, are meant for all diesel non-road apparatus with engine sizes smaller than 560kW, diesel three-wheeler trucks, and waterway vessels with diesel engines smaller than 37 kW.