Heavy-duty truck on the road
12K+
Heavy-duty trucks in use 
35+
Countries in operation
Aetherion Technologies · Formerly Westport Fuel Systems

Cleaner power for the engines that move the world.

12K+
Heavy-duty trucks in use 
35+
Countries in operation

For thirty years we have engineered clean fuel systems for heavy-duty transport. Today that work is focused where decarbonization is hardest and the impact is biggest.

AT SCALE

Thirty years. Three billion kilometres. Zero compromise.

HPDI™
Proven where performance matters
1
platform
LNG, CNG, RNG, bio-LNG, H2
12,000+
Trucks on the road
FULLY OEM INTEGRATED
BETTER ECONOMICS AND LOWER EMISSIONS
FULL POWER RETAINED
CESPIRA’S HPDI™ FUEL SYSTEMS

Diesel performance, on low-carbon fuels.

Power, torque and efficiency with near-zero GHG emissions—HPDI delivers diesel-cycle performance on LNG, bio-LNG and hydrogen through Cespira, our JV with Volvo Group.

Heavy-duty truck on the road
500 HP
1,850+ LB-FT OF TORQUE
UP TO 10 MPG DIESEL-GALLON EQUIVALENT
HIGH-PRESSURE CNG SOLUTION

Fuel flexibility without compromise for North America

Complete high-pressure CNG storage and delivery solution for heavy-duty fleets, engineered around the two factors that matter most: diesel-like performance and lower operating costs.

20+ Years H2 Expertise
250,000 Hydrogen components sold
Complete fuel system solution
Fuel Containment, Tank to Engine

High-Pressure Controls

Complete fuel system solutions — from high-pressure tank valves to low-pressure electronic fuel control — for industrial, off-highway, and on-road mobility sectors.

FUEL AGNOSTIC BY DESIGN

The fuel changes. The system doesn't. That's the point.

Fuel availability and policy vary by market and shift by year. A single-fuel bet locks you into one set of risks. Our platform moves with the market instead of against it.

WHICH SYSTEMS SUPPORT IT

HPDI™ Fuel Systems

A commercial product today, delivered through Cespira, our joint venture with Volvo Group.

WHAT IT DELIVERS VS DIESEL

Full diesel-cycle performance

Diesel-like torque, range, and payload. Full power retained — not a detuned compromise.

INFRASTRUCTURE STATUS

Mature and expanding

Building on Europe’s LNG corridors and North America’s CNG network—fuel infrastructure already moving at scale.

LNG
CNG
RNG
Hydrogen
FUEL AGNOSTIC BY DESIGN

The economics are tipping our way. Here's why.

Regulatory pressure, fuel costs, infrastructure, and policy are aligning at the same moment. We didn't wait for it.

Regulation

Fleet CO₂ mandates and renewable fuel targets in the EU recognize natural gas pathways as compliance routes, not exceptions.

Fuel economics

Natural gas holds a persistent price advantage over diesel in most markets.

Infrastructure

Unlike heavy-duty charging, the natural gas fuelling network already exists and continues to expand.

Market reset

The industry is refocusing from zero-tailpipe mandates onto what actually pencils out. That's the ground we've been standing on.

partnership

We think like integrators, not vendors.

Every strategic move we make happens with and through others. Joint ventures, OEM engineering teams, fuel providers, infrastructure partners. We solve problems together.

FUEL AGNOSTIC BY DESIGN

Focused by choice.
Positioned by timing.

A focused portfolio for a changing heavy-duty market. Aetherion is a reintroduction with purpose: a sharper portfolio, a clearer heavy-duty focus and a partner-led commercialization model designed for where the market is going

WHOLLY OWNED
100%
High-Pressure CNG Solutions

High-pressure CNG fuel storage solutions designed for North American heavy-duty transport. They store natural gas, RNG, and hydrogen blends and support diesel-level performance at a lower total cost of ownership.

JOINT VENTURE
55%

Designs, manufactures, and delivers HPDI™ fuel systems to heavy-duty OEMs and engine manufacturers. Non-exclusive mandate, built to serve the whole market.

WHOLLY OWNED
100%
High-Pressure Controls

High-pressure controls and components for industrial and off-highway integrators.

THE INVESTOR CASE

Diesel performance.
Without the diesel.

Technology ecosystem connector
Who we are

An ecosystem for hard-to-decarbonize transportation and industrial applications

Fuel system leader $1B-$10B revenue runway
Where we are going

Diesel-class performance, lower running costs, fewer emissions

Trucking's toughest emissions
What we fix

Opening up a ~280,000 truck/yr North American market, plus international HPDI market via Cespira

About Aetherion
About Aetherion

One fuel system. Multiple fuels. Diesel performance. Lower costs.

Let's talk about the engines you can't electrify.

Whether you run a fleet, build trucks, integrate components, or hold shares, there's a specialist here who can help.

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