Cespira, a joint venture between Westport Fuel Systems and Volvo Group, recently released new technical details for HPDI 3.0, the next generation of its High-Pressure Direct Injection fuel system.

Designed for heavy-duty applications, the updated architecture introduces enhanced rail-pressure control, improved hardware durability, and greater engine packaging flexibility for original equipment manufacturers (OEMs).

“Cespira’s revenue increased 125% year-over-year from Q2 2025 to Q2 2026, underscoring strong market validation for HPDI technology,” Westport CEO Dan Sceli said in a news release. “With continued gains in efficiency, attractive total cost of ownership, and improved fuel price stability, we believe HPDI is well positioned to grow adoption momentum with OEMs and fleets.”

Key features and enhancements

According to Westport, the HPDI 3.0 fuel system introduces several core technical upgrades aimed at improving engine performance, hardware durability, and integration flexibility for OEMs, including:

• Fuel rail-pressure control: Includes a new architecture that improves fuel economy, enhances engine performance, simplifies OEM calibration, and supports compliance with upcoming global emissions regulations.
• Higher injection pressures: Delivers higher injection pressure capabilities to unlock increased power and efficiency from modern high-performance compression-ignition engines.
• Extended hardware durability: Incorporates proven HPDI injector dynamic sealing technology to extend component service life under heavy-duty operations.
Multi-bank modular integration: Allows separate fuel pressure control across distinct cylinder banks, enabling integration into larger engines, including V12 and other multi-bank configurations across on-road and off-road sectors.

Fuel flexibility and commercial timeline

HPDI 3.0 is built to run on liquefied natural gas (LNG) and renewable bio-based LNG (bioLNG) while maintaining diesel-like combustion performance, Westport explained. The architecture is designed to be adaptable for future zero- and low-carbon fuels, including hydrogen, as market demand and infrastructure mature.

The current generation of HPDI technology has accumulated more than 3 billion kilometers of real-world operation across over 12,000 trucks in 35-plus countries. Production of HPDI 3.0 is scheduled to begin in the fourth quarter, with the first vehicles equipped with the new system expected on the road in early 2027.