WOOD DALE, Ill., June 10, 2013 (GLOBE NEWSWIRE) -- Cleantech engine supplier Power Solutions International, Inc. (PSI) (Nasdaq:PSIX) will present its newest fuel-flexible powertrain systems at the upcoming 2013 Alternative Clean Transportation (ACT) Expo. The Company will showcase its 4.8-liter, 6.0-liter, and 8.8-liter power systems as well as a new clean-fuel delivery truck. The truck is part of a pilot program on which PSI is collaborating with a national grocery-delivery fleet.

The ACT Expo is the largest gathering of clean-vehicle stakeholders in the US and will run from June 24^th to 27^th at the Walter E. Washington Convention Center in Washington, DC. PSI will be showcasing its new cleantech products at booth 331.

"Corporate, municipal and delivery fleets are moving toward alternative fuels, due to environmental regulations, high compliance costs and volatile fuel prices," said Jeremy Lessaris, Director of Marketing at PSI.  "ACT Expo is the perfect place for us to present the fuel-flexible powertrain solutions that fleets are seeking."

With the addition of the new 4.8-liter and 6.0-liter power systems, PSI is accelerating its entrance into the on-highway market, which began last year with the launch of its 8.8-liter engine.

In March, PSI announced a multi-year supply agreement with General Motors for the use of its 4.8-liter and 6.0-liter engines and associated transmissions for medium-duty truck and bus powertrain solutions.  With the addition of these GM products, PSI now offers one of the industry's most comprehensive product lines for certified alternative-fuel Class-4 through Class-8 on-highway powertrains.

For more information on PSI, visit http://www.psiengines.com.

About Power Solutions International, Inc.

Power Solutions International, Inc. (PSI) is a leader in the design, engineering and manufacture of emission-certified, alternative-fuel power systems. PSI provides integrated turnkey solutions to leading global original equipment manufacturers in the industrial and on-road markets. The company's unique in-house design, prototyping, engineering and testing capacities allows PSI to customize clean, high-performance engines that run on a wide variety of fuels including natural gas, propane, biogas and gasoline.

PSI develops and delivers complete power systems with engines ranging from .97-Liter to 22-Liters of displacement, including the 8.8-liter engine aimed at the industrial and on-highway markets including medium duty fleets, delivery trucks, school buses and garbage/refuse trucks. PSI power systems are currently used worldwide in power generators, forklifts, aerial lifts, and industrial sweepers, as well as in oil and gas, aircraft ground support, agricultural, and construction equipment.

CONTACT: Jeremy Lessaris

         Director of Marketing

         Power Solutions International

         Phone: +1 (630) 350-9400

         E-mail: jlessaris@psiengines.com

News Provided by Acquire Media