Weichai Has EPA Certified Diesels For North America

14 October 2019

Life in the higher displacement diesel world just got a little more interesting with the announcement that Power Solutions International Inc. (PSI), is launching a line of 20-, 40- and 53-liter EPA certified diesel engines in partnership with Weichai.

Chinese-built, EPA-certified diesel engines have long been the elephant in the room for the North American engine business. And now here comes the first move in that direction.

PSI, which is based in Wood Dale, Illinois, USA, has long offered a range of natural gas-fueled engines across several power nodes, but these are the first certified diesel power generation units the company has offered.

As emissions certification is the defining factor for the North American engine markets, PSI said the three engines were U.S. Environmental Protection Agency (EPA) emergency standby certified on Sept. 3, 2019. The certifications cover stationary emission regulations for operation on diesel fuel for model year 2020.

The three engines are being targeted for stationary 60 Hz power generation applications supporting EPA certified standby distributed generation. These three initial PSI engines cover the 550 through 1600 kWe power nodes.

Power Ratings

PSI said the three diesels are now ready for production. The 20-liter diesel engine has a power range of 550 to 600 kWe, while the 40-liter engine offers output between 750 kWe to 1.25 MW. The power range of the 53-liter engine is between 1.5 and 1.6 MW.

“The three newly introduced diesels are primarily targeted for commercial, industrial and mission-critical emergency standby markets, specifically applications  including healthcare, water/wastewater treatment, data center, manufacturing, hotel/casino, and any other power critical emergency backup requirement, said PSI’s Mike Biltimier, vice president of the PSI Energy Division.

“We have been collaborating with Weichai on the requirements needed for diesel engines for the North American standby markets,” Biltimier said. “It is really exciting for PSI to be certified by the EPA and to now offer a full power generation solution including gas and diesel engines to the North American marketplace.”

The certifications were facilitated by Weichai, PSI’s strategic partner. In April 2019, Weichai exercised, under a previous warrant agreement, the purchase of additional shares of PSI resulting in Weichai owning 51% of PSI.

As such, PSI has access to Weichai’s manufacturing facilities and supply chain network, and both companies share best practices in engine research and development as well as manufacturing, procurement and distribution.

The three new diesel engines will be branded PSI within the North American market. “PSI is going to be the lead brand and if customers here have other applications outside of North America, the PSI brand will follow the customer,” Biltimier said.

“Our initiative is focused on North American EPA certified opportunities,” Biltimier said. “We are going to focus on distributing these engines through our current OEM family that we sell our natural gas engines to, as well as new OEMs. We are in prototype development programs with almost each and every one of those customers.”

Engine Platform

The engines are built off an established marine diesel platform from Weichai’s Baudouin operations. PSI receives the diesels from Weichai and modifies the engines as required for specific applications in the North American markets.

The 20-liter model is an inline six-cylinder design that produces 550 or 625 kWe for standby diesel uses. (PSI said kWe values are based on standard assumptions for mechanical and electrical losses. Ratings and performance are subject to site conditions and PSI application and ratings guidelines.)

The engine is a turbocharged and intercooled design with a high pressure common rail fuel system and electronic governor. The design of the engine includes a cast iron cylinder block with an inspection door per cylinder and includes cast iron cylinder liners, wet type and replaceable valves guides and seats and separate cast iron 4-valve cylinder heads.

The 40 liter model is a V-12 turbocharged and intercooled design also with a high pressure common rail and electronic governor. Outputs for standby uses are 750, 1000 and 1250 kWe

The engine also has a cast iron cylinder block with an inspection door per cylinder, cast iron cylinder liners, wet type and replaceable valves guides and seats and separate cast iron 4-valve cylinder heads.

Finally, the V-16 53-liter diesel has 60 Hz outputs of 1500 and 1650 kWe. Again it is a turbocharged and intercooled design with an electronic governor and a high pressure common rail fuel system. Most of the engine design features are the same as outlined above.


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