Delphi Fuel Injector Promises 50% Drop in Soot Emissions

Delphi Technologies Inc. says its new 500-bar (7,250-psi) gasoline-direct-injection (GDI) system can cut particulate emissions in half compared with current 350-bar (5,100-psi) units.

The technology will be ready for use in production vehicles by 2022, according to the supplier. Delphi announced the system at this week’s Vienna Motor Symposium.

Delphi launched its industry-first 350-bar GDI system in late 2016. The system lowers particulate emissions by as much as 70% over 200-bar (2,900-psi) units.

As with its 350-bar system, the 500-bar unit (pictured) requires little if any modifications to current engine architectures, according to Delphi.

The supplier notes that previous attempts to increase pressure to this level would have required a costly redesign to strengthen the camshaft mechanism that powers the GDI pump. Delphi says it overcame those hurdles with a new sealing system and smaller plunger diameter, which reduces loads on the drive mechanism. All components—injectors, pumps, forged rail and engine control system—were developed internally.

The new system reduces the number of tailpipe particulates, including those smaller than 23 nm. The technology also helps reduce carbon dioxide emissions, according to Delphi.