ACT Expo 2018


APG Plans Low-NOx Dual Fuel for Trucks

April 7, 2017 in NGVs, trucking by Rich Piellisch  |  No Comments

Emphasis Is on 13- to 16-Liter Engines for Heavy Vehicles
With SCR Gear That Have Come on the Market Since 2010

The American Power Group board has approved funding to develop a “first-of-its-kind” low-NOx dual fuel natural gas-diesel engine system. The new upfit would couple APG’s existing dual fuel equipment with a new exhaust thermal management system.

APG wants to slash the NOx emissions of its V5000 dual fuel system by adding ETMS – its new exhaust thermal management system.



APG’s ETMS “is designed to create a quicker warm-up and maintain an optimum temperature performance of an OEM’s diesel engine’s selective catalyst reduction [SCR] system … in order to significantly reduce remaining areas of high smog-forming NOx production.

NOx reductions of 50% or even 75% below current U.S. EPA and California Air Resources Board standards “are projected,” APG says, “which would qualify diesel engines upgraded with APG’s Dual Fuel/ETMS system to meet California’s Optional Low NOx diesel engine emission standards.

‘APG V6000 with ETMS’

“There are millions of 13-liter to 16-liter high- horsepower diesel engines on the road that cumulatively rank as the number one source in NOx emissions,” APG CEO Lyle Jesnen said in a release.

“Currently,” he said, “no alternative low NOx solution exists for this class of engines without compromising their critical heavy-haul power and torque capabilities. The existing APG V5000 and the new APG V6000 with ETMS have the opportunity to fill this void with no loss of power on legacy diesel engines and present options for a new dual fuel natural gas low NOx high-horsepower diesel/SCR engine for the heavy-haul OEM market.

‘A Multi-Billion Dollar Addressable Market’

“Diesel/SCR engines came to market in 2010 and we now have around one million legacy Diesel/SCR engines on the road with another 150,000 to 200,000 new diesel/SCR powered Class 8 trucks being purchased every year,” Jensen added. “For APG, this becomes a multi-billion dollar addressable market with a perpetual annual supply of additional diesel/SCR engines coming into the market.” (emphasis added)

“California continues to face the worst air quality problems in the U.S. and is looking to support technologies that can have an immediate and practical impact on diesel related emissions reduction,” said APG strategic director Matthew Van Steenwyk. “Diesel engines with SCR systems will be in commercial use for the foreseeable future with few known emission reduction improvements.

Better Than Electric?

“High-horsepower dedicated natural gas engine development above 11.9 liters has been mothballed or suspended due to loss of comparable horsepower and torque of a diesel engine,” Van Steenwyk said.

“Various SCR thermal management systems have been proposed as a component in low NOx after-treatment systems with limited success to date,” he continued. “APG’s dual fuel natural gas-based design may have significant performance and economic advantages when compared to electric- and diesel burner-based systems.

Good for the NGV Business Too

“If this technology performs as expected and proves to be the best economically deployable solution,” Van Steenwyk said, “it could significantly reduce diesel emissions in California’s non-attainment regions and create hundreds of thousands of new jobs to support the increased demand utilization of American produced natural gas.”

Initial phase emissions testing will be performed this spring at CAFEE. the Center For Alternative Fuels, Engines, and Emissions at West Virginia University, APG says.


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Source: APG with Fleets & Fuels follow-up

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