PSI recently shipped a prototype 8.8-liter closed power unit (CPU) to Vac-Con, a Florida-based manufacturer of custom-built, truck-mounted environmental cleaning equipment.

PSI’s efforts to expand our products into new industrial markets are paying off. Recently, we shipped a prototype 8.8-liter closed power unit (CPU) to Vac-Con, a Florida-based manufacturer of custom-built, truck-mounted environmental cleaning equipment. Vac-Con’s Titan truck is the first industrial machine using the CPU, which includes an 8.8-liter gasoline engine as well as a control panel, fuel and exhaust systems, a cooling package and enclosures.

The Titan is used for water/sewer line cleaning and hydro-excavating applications. The CPU powers a large water pump and hydraulics for the truck, allowing the machine to perform its work in a greener manner since its primary diesel engine does not need to run while the pump and hydraulics are used. The truck’s water pump can flow 80 gallons of water per minute at 3,000 PSI; a typical pressure washer flows three to five gallons per minute.

PSI will soon ship a second prototype 8.8-liter CPU to Vac-Con. Eventually, the OEM is anticipated to build between 100 to 150 trucks using PSI’s 8.8-liter CPUs annually. PSI’s engine offers Vac-Con a cost-competitive, reliable product that is easy to service.

Additional opportunities in the water/sewer cleaning and hydro-excavating markets include selling CPUs with smaller gas engines – such as our 2.4-, 3.0-, 4.3- and 5.7-liter engines – to manufacturers of trailer-mounted hydraulic pumps.

PSI began adapting the 8.8-liter engine for industrial applications in February 2017. Previously, the engine was used only in the stationary genset and on-road markets and the only options for industrial OEMs in the 245 hp power range were expensive Tier 4 diesel engines. PSI leadership saw the potential of the engine in the new market and approved the program.

The 8.8-liter engine’s enclosure, cooling system and dress components were designed and prototyped by September 2017. However, during dyno testing of the first engine prototype that month, PSI engineering realized there were technical hurdles regarding engine performance and exhaust temperatures that still needed to be overcome.

Between late 2017 and the end of 2018, the PSI engineering team conducted extensive analysis and experimentation on the prototype. This included using different pistons to lower the engine’s compression ratio and running simulations in the GT Power software to optimize the camshaft for the engine’s likely operating conditions. This work enabled the team to lower engine exhaust temperatures and achieve target power numbers.

Testing is now underway on the first wood chipper with an 8.8-liter engine. PSI has long sold smaller engines for this application; the 8.8-liter engine would allow us to expand our offerings to existing customers as well as sell to OEMs of large wood chipper machines.

Employees involved in the 8.8-liter CPU project included Abdel Abdallah, James Abrahamson, Darrin Anderson, Mike Boscardin, Jerardo Campos, Rudy Castellanos, Keith Curran, Mark Damico, Scott DeMatteis, Anthony Farberger, Dave Franzen, Brian Grant, Seth Holdeman, Dan Kasper, Kevin Kendzierski, Mike King, Carlos Lara, Chad Lela, Maurilio Marquez, Andreas Mastoracos, Doug Medynskyj, Chad Meeks, Nick Nokovic, James Powell, Dona Punnose, Michael Riley, John Sager, Jessie Sanchez, Brian Schirmulis, Cameron Smith, Pat Tarpey and Aaron White.