01 / Heavy transport
Keep high-utilisation vehicles moving.
Compact onboard power and rapid fuel replenishment can support long duty cycles where payload, uptime and charging access remain critical.
E2 Power Systems · Delft, The Netherlands
A new architecture for heavy-duty power.
E2 is developing a pressure-pulse impulse turbine for applications where sustained power, energy density, uptime and infrastructure still matter.
01 / Mission
Make heavy mobility sustainable without sacrificing power.
Different machines live different lives. E2 is being developed for applications where sustained power, fast energy replenishment and compact packaging remain difficult to reconcile.
There will not be one universal powertrain. E2 is being built for the part of the market that still needs a lot of power for a long time.
The energy transition should expand the set of viable machines — not force every duty cycle into the same architecture.
02 / Architecture
Pressure first. Rotation second.
Instead of using combustion pressure to drive pistons, E2 separates pressure generation from rotary power extraction.
01Fuel + airprepare energy
02Pressure pulserelease energy
03Momentum flowdirect energy
04Shaft rotationextract work
Prototype conceptPressure-pulse rotor architecture
E2 is not intended to replace every powertrain. It is being developed for duty cycles where sustained power, compact onboard energy, rapid response and fuel adaptability remain valuable.
03 / Why E2
Built to do more with less.
01 / POWER
+24%
Power potential
vs. H₂ ICE benchmark
02 / RESPONSE
<200 ms
Rapid spin-up
to ~3,000 rpm
03 / PACKAGING
−41%
Package volume
vs. H₂ ICE benchmark
04 / FUEL
Multi-fuel
Fuel-adaptable architecture
developed with propane today, with hydrogen as the long-term objective
E2 combines rapid response, compact packaging, high power potential and fuel adaptability in one rotary architecture.
Based on current E2 engineering results and benchmark analysis.
The case for E2
The world is electrifying. That does not mean every machine will store all of its energy in batteries.
Our manifesto sets out the duty-cycle, infrastructure, energy-carrier and power-conversion thesis behind E2.
Read the manifesto →
02 / Off-highway
Power where the grid is not.
Construction and industrial machines need sustained mechanical power in demanding environments, often far from high-power electrical infrastructure.
03 / Marine
Carry energy for long operating windows.
Fuel-based rotary power can preserve range and endurance where vessels must carry their energy supply for extended periods.
04 / Distributed power
Dispatchable power when it is needed.
A compact fuel-flexible architecture can serve remote, backup and distributed generation where dependable power matters more than grid proximity.