Cummins QSK50 dual-fuel engine Tier 4 certified

By Becky Schultz18 August 2022

The dual-fuel application delivers the same power density and transient response as diesel, while operating at an optimized substitution rate tailored to the oil and gas market. (Photo: Cummins)

UPDATED ON AUGUST 18, 2021: As an initial move in its promise in 2021 to expand its offerings to the oil and gas market, Cummins Inc. announced its dual-fuel capability additions to its QSK50 engine have met the U.S. Environmental Protection Agency’s (EPA) stringent Tier 4 emissions requirements.

According to Cummins’ specs, the QSK50 dual-fuel engine targeted to the oil and gas market is rated 2250 to 2500 hp at 1900 rpm (1678 to 1864 kw at 1900 rpm) and peak torque of 6300 to 7081 lb.-ft. at 1500 rpm (8542 to 9600 Nm at 1500 rpm). Dual-fuel capability is achieved via a kit containing dual fuel components integrated with the Tier 4 Final engine. The kit is available for both first fit applications and as a retrofittable solution. Integrated controls allow for a seamless transition from diesel fuel to dual-fuel operation, the company noted.

In dual-fuel mode, natural gas is introduced into the intake system, reducing diesel consumption while maintaining the same power density, torque and transient response. This ensures the reliability of a traditional diesel engine while operating at an optimized substitution rate tailored to the oil and gas market, Cummins explained.

“Entering production in Q3 this year, this expansion of the QSK50 product line will supply our customers with a future-forward solution that cuts their emissions while continuing to provide proven reliable high-performance operation,” said Patricio Escobar, general manager, Cummins Oil & Gas Segment. “At a time where our customers, and the oil and gas industry, are ever-focused on reducing their environmental footprint and improving their financial performance, our dual-fuel engine solution is a great addition to the ultra-low emission power portfolio.”

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