Our unique patent pending design solves the inherent challenges of pre-ignition, poor cold starting, unbalanced combustion, uneven temperatures, limited RPMs and loads with Homogeneous Charge Compression Ignition or Homogeneous Compression Ignition (HCCI/HCI).

Welcome to Nautilus Engineering


With this new technology, we've achieved full control over the HCI/HCCI cycle in all conventional RPM ranges, loads and temperatures. This may be rapidly implemented into existing platforms and will meet and even exceed 2025 EPA Regs.

-Flameless Combustion
-No Spark plugs 
-No Direct-Injection

Using a Snap-On Exhaust 5 Gas Analyzer
87 Octane Pump Gasoline

Partnering Organizations

ANSYS Startup Program partners with Nautilus Engineering
Enerpulse partners with Nautilus Engineering
Autobon Power partners with Nautilus Engineering

Latest News

Piston Design - Primary and Secondary

Being able to run the engine so lean means that substantial fuel savings are projected for the Nautilus HCCI engine compared with both petrol and diesel. "On a per litre basis we're going to be 20-30% more efficient, diesel would be about 20-25%, and petrol will go even higher," says Riley.

7th International Diesel Summit, Beijing 2017

Nautilus Engineering LLC attended the Diesel Summit along with Presidents, Managing Directors, VPs, Directors from Chinese, European and American regulatory agencies (EPA, EU Commission, Beijing, India, Korea, Japan) and OEMs, engine manufacturers. The majority of speaker topics centered on reduced Emissions solutions.

M. Riley-CEO, Nautilus Engineering, addressed the audience with the Nautilus HCCI/HCI Cycle technology and benefits, with all attendees expressing great interest and requests for immediate follow-up.