PSI 8.8-LUltra-Low NOx Propane Engine Receives EPA Certification

The engine is certified to a NOx emission standard of 0.02 grams per brake horsepower and has a 10% better carbon dioxide emission rate.

8 8 L Lpg Render 2
Power Solutions International

Power Solutions International, Inc. (PSI) announces the U.S. Environmental Protection Agency (EPA) and California Air Resources Board (CARB) have certified the company’s new 8.8-L ultra-low nitrogen oxide (NOx) emission propane engine for the transportation market. 

Produced in collaboration with Navistar’s IC Bus brand, the engine is certified to a NOx emission standard of 0.02 grams per brake horsepower (g/bhp-hr), making it one of the cleanest propane engines available on the market. The 8.8-L engine is certified beyond the EPA’s strictest emission standards and also exceeds CARB’s optional low NOx standard for heavy-duty engines.

In addition to having an industry-leading NOx emission standard, the engine’s carbon dioxide (CO2) emission rate is 10% better than that of current competitive propane engines. School bus fleets making the switch from diesel to propane engines are eligible to receive federal, state and private grants.

PSI is proud to support the growth of our customer IC Bus, which first introduced the 8.8-liter propane engine in 2015,” says PSI CEO John Miller. “We continue to make advancements to our 8.8-L engine, which is clean burning and unmatched in power and performance in the transportation industry.”

The new engine offers 270 hp with 565 lb.-ft. of torque, comparable to PSI’s existing propane engines. The company will continue to offer its conventional 8.8-L propane engine as well as the new ultra-low NOx version. The ultra-low NOx engine will power IC school buses. Production is anticipated early next year.

The ultra-low NOx 8.8-L engine reaffirms PSI’s commitment to producing clean-running high performance power systems for the transportation industry. For the past few years, PSI and IC Bus have worked together on propane and gasoline-powered alternatives to diesel school buses in an effort to reduce NOx emissions. NOx emissions are known to be harmful to humans and the environment and contribute to ozone, smog and other air quality issues.

“IC Bus is proud to once again collaborate with PSI to bring a clean, powerful, high quality alternative fuel engine to the school bus industry,” says Trish Reed, Vice President and General Mmanager, IC Bus.