Fleet owners looking for a low emission, high efficiency, and affordable engine solution will soon have new technology to turn to thanks to a partnership between Stanadyne, Katech, and the Propane Education & Research Council. The innovation combines Stanadyne’s direct injection fuel pump and injector system with Katech’s vapor lock technology to create the industry’s first medium-duty engine system that can deliver propane autogas at a constant 350-bar pressure directly into the engine. It’s all part of the three company’s combined decarbonization mission.
The breakthrough engine technology overcomes vapor lock, a common technical issue when liquified gases vaporize, which can interrupt fuel pump operation. By finding a solution, the new technology improves engine performance and efficiency. The combined system fueled a standard 6.6L GDI engine during a 250-hour performance and durability test. The tests successfully demonstrated that the technology works with existing engines and that propane autogas can be a low-carbon, high-performance replacement for gasoline and diesel engines.
The new technology will help fleet owners exceed the ultra-low emissions mandates going into place in 2027. Compared to diesel, propane autogas reduces harmful nitrogen oxide emissions by 96 percent and provides a five to 10 percent reduction in carbon dioxide emissions. The engine technology can also utilize renewable propane, which has a carbon intensity four times lower than conventional diesel.