supplier Power Solutions International, Inc. (PSI) has earned US Environmental Protection
Agency (EPA) and California Air Resources Board (CARB)
certification for two of its spark-ignited industrial engines,
the 2.0-Liter and 2.4-Liter. Both engines meet the
CARB/EPA standards for off-road, large spark-ignited (LSI)
engines for mobile applications running on propane and
certified models will in turn help end-users reduce their
impact on the environment, provide cleaner working
environments for employees, and meet sustainability
"PSI is committed to producing engines that meet our customers’ highest performance demands, while
also protecting the environment,” said Gary Winemaster, CEO of PSI. “Our goal was to provide a cost-effective four cylinder on a robust automotive platform, ruggedized for industrial applications with a long
term product plan. What we have produced is a high-tech, four cylinder 2.0-Liter and 2.4-Liter engine
with cast iron blocks, industrial leading valve insert technology and product plan that leads into the
2020’s. These certified engines will support industrial OEMs in the process of compliance and help their
customers meet and exceed emission regulations for the future.”
PSI developed the 2.0L and 2.4L engines as low-emission forklift engines filling a much needed
gap in the industry. These new displacements operate at lower speeds for better fuel efficiency.
Starting with a proven base engine, PSI has upgraded select components to further improve the
durability of the valvetrain. Premium valve seat inserts extend the valvetrain life to well beyond 10,000
hours when operating on gaseous fuels, while the premium camshaft and balance shaft belts extend the
service interval to 5,000 hours on these components.
The company has leveraged advanced fuel
systems and controls to further enhance the engines’ overall operation and durability. State of the art
fuel controls enable seamless operation on gaseous fuels or gasoline while minimizing emission levels.
The 58X crank / 1X cam position sensing for the ignition system optimizes engine performance and startability, while the inlet side thermostat enables faster warm-up and reduced thermal cycling after a
cold start. Both engines incorporate a balance shaft and structural bearing ladder
for reduced noise and vibration compared to the predecessor engines.