Work Truck Logo
MenuMENU
SearchSEARCH

Cummins Westport Medium-Duty CNG Engines Gain Certification

A pair of Cummins Westport, Inc. natural gas engines have gained approval from the U.S. Environmental Protection Agency and California Air Resources Board for medium-duty vehicles, the engine maker announced.

by Staff
December 13, 2017
Cummins Westport Medium-Duty CNG Engines Gain Certification

Photo of L9N engine courtesy of Cummins Westport.

1 min to read


Photo of L9N engine courtesy of Cummins Westport.

A pair of Cummins Westport, Inc. natural gas engines have gained approval from the U.S. Environmental Protection Agency and California Air Resources Board for medium-duty vehicles, the engine maker announced.

The 2018 L9N and B6.7N engines meet California's Low NOx standards and the 2017 EPA greenhouse gas emissions requirements for the engines, which are used in medium-duty trucks, including refuse haulers, school buses, and transit shuttles.

Ad Loading...

The L9N has been certified to Californial's optional Low NOx standard of 0.02 g/bhp-hr, which is a 90% reduction from engines operating at the current EPA NOx limit of 0.2 g/bhp-hr. The L9N offers ratings from 250 hp to 320 hp and 1,000 lb.-ft. peak torque.   

The B6.7N has been certified to California's optional Low NOx standard of 0.1 g/bhp-hr, which is a 50% reduction from current EPA levels. The engine is available with ratings from 200 hp to 240 hp and 560 lb.-ft. peak torque.

The company plans to introduce a third natural gas engine — the ISX12N — that's expected to meet the optional Low NOx emissions level of 0.02 g/bhp-hr. Production of the three engines will begin by April 1.

More Green Fleet

Artist rendering of an ev charging facility from an overhead view.
Green Fleetby News/Media ReleaseApril 16, 2026

EV Realty Opens Major Truck Charging Hub in California’s Inland Empire

EV Realty’s San Bernardino Powered Properties’ truck charging hub, which has now opened, can serve over 200 medium- and heavy-duty trucks per day.

Read More →
Closeup photo of an EV charger plugged into an EV, with white logo for WEX.
Green Fleetby News/Media ReleaseApril 13, 2026

WEX Launches Solution to Close the EV At-Home Charging Visibility Gap for Fleets

WEX unveiled its EV At-Home with Vehicle Fraud Protection, which ensures accurate and secure reimbursement for at-home charging.

Read More →
Woman and two men standing holding paperwork agreements they have signed with logos for Daimler Truck, Toyota, and Volvo over their heads.
Green Fleetby News/Media ReleaseApril 6, 2026

Toyota Motor Corporation to Join Daimler Truck & Volvo Group in Fuel Cell Joint Venture Cellcentric

Toyota intends to join Daimler Truck and Volvo Group as an equal shareholder in Cellcentric. All three shareholders intend to further strengthen Cellcentric as a leading manufacturer of fuel cell systems for heavy-duty commercial applications.

Read More →
Ad Loading...
Terminal truck hauling a container trailer with a cargo ship and windmill in the background.
Green Fleetby News/Media ReleaseApril 3, 2026

Volvo Penta Electric Drivetrain Powering Terminal Tractors

Volvo Penta and Volvo Financial Services (VFS) have partnered to support one of Northern Europe's largest shipping and logistics companies in its ambition to transition to electric terminal tractors.

Read More →
Two men stand together holding a certificate award with large commercial trucks in the background.
Green Fleetby News/Media ReleaseApril 1, 2026

PacLease in Dallas Awarded Dallas-Fort Worth Clean Cities Award

PacLease in Dallas, Texas, received a Clean Cities Award from the Dallas-Fort Worth Clean Cities Coalition. PacLease invested in two fast-charging pedestals, one located in Dallas and the other at its sister location in Grand Prairie.

Read More →
Step van driving down road with large orange headline +20,00,000 miles.
Green Fleetby News/Media ReleaseApril 1, 2026

Workhorse Electric Vehicles Surpass 20 Million Miles

More than 1,100 Workhorse trucks, buses, and shuttles have displaced the use of 2.3 million gallons of gas and prevented the emissions of 45 million pounds of CO2. Those vehicles have amassed more than 20 million miles combined.

Read More →
Ad Loading...
Image of a row of EV charging stations and an inset image of a screenshot from a computer and from a smartphone showing charging data.
Green Fleetby News/Media ReleaseMarch 31, 2026

Independent Review Validates Greenlane’s Data Security & Compliance

Greenlane's security controls were independently verified as operating effectively across a nearly year-long audit period. Achieving both SOC 1 and SOC 2 Type 2 compliance demonstrates that Greenlane meets the data security standards enterprise fleet operators require from a charging partner.

Read More →
Man standing in front of an image of a blue-tinted box truck with logos for Work Truck and Truck Chat, and a yellow headline, Meet Harbinger's HC Series Cab.
Green Fleetby Wayne ParhamMarch 30, 2026

Harbinger CEO Explains New Low-Cab-Forward Truck

Join Work Truck as we tour Harbinger Motors’ new HC Series cab, a medium-duty low-cab-forward work truck available in electric and hybrid configurations, with CEO John Harris.

Read More →
Computer screen with software and numbers displayed.
Green Fleetby Wayne ParhamMarch 27, 2026

ChargePoint Launches Tools to Improve EV Charger Management

ChargePoint’s new Premier Care supports large or complex charging networks by providing concierge services to streamline operations, and the new Support Portal transforms the customer support experience into a transparent self-managed hub.

Read More →
Ad Loading...
Work Truck Week 2026 Work Truck from the Show Floor FCCC
Green Fleetby News/Media ReleaseMarch 16, 2026

FCCC Collaborates with Roush On Next-Gen Engine

FCCC will work with Roush Power Systems, a recently formed division of Roush, to integrate the new GM 6.6L gas engine into its chassis products across a range of applications and markets.

Read More →