PSI supplies Hyundai with propane engines for its LPG forklifts.

Clean technology engine supplier Power Solutions International Inc (PSI) says its Tier IV diesel engine replacement program with Hyundai Heavy Industries Co Ltd is a success.

PSI supplies Hyundai with 4.3 litre liquid propane engines for its 7A series 60/70L LPG forklifts, supporting production at PSI's plant in Ulsan, South Korea.

Gary Winemaster, CEO of PSI, says his company is delighted to work with Hyundai. "The project is helping us build a stronger supply partnership with Hyundai, and serves as an excellent demonstration of how well our propane industrial engines outperform other options in terms of power and torque."

The PSI 4.3 litre LP engine delivers 118 hp and 240 ft-lbs of torque at 2,600 rpm when running on liquid propane fuel. PSI claims the engine offers end-users greater acceleration, better gradability, and fast travel speeds on tough terrains and slopes.

PSI's fuel and emission control system meets all EPA and CARB emission regulations for large spark-ignited engines.

Jeremy Lessaris, PSI's director of marketing, says the forklift market has been one of the company's fastest growing segments in recent years "as OEMs continue to shift to cost-competitive, emission-compliant liquid propane engines".

Lessaris says PSI's forklift engine sales nearly tripled in the last two years.

According to the Propane Education & Research Council, propane engines are now 80% to 90%of the internal combustion forklift market, or more than 670,000 engines, in the US.

Illinois, US-based PSI provides integrated turnkey solutions to global original equipment manufacturers in the industrial, off and on-road markets. PSI power systems are used in power generators, forklifts, aerial lifts, industrial sweepers, and in oil and gas, aircraft ground support, agricultural and construction equipment.