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Transonic Combustion

Founded Year



Series D | Alive

Total Raised


Last Raised

$32M | 10 yrs ago

About Transonic Combustion

Transonic Combustion is a high tech startup company commercializing a fuel injection technology and related components for vehicle manufacturers worldwide. The company has demonstrated a cost competitive solution providing increased engine efficiency of up to 25% through use of supercritical fuel injection.

Headquarters Location

461 Calle San Pablo San Pablo Business Park

Camarillo, California, 93012,

United States


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Transonic Combustion Patents

Transonic Combustion has filed 24 patents.

patents chart

Application Date

Grant Date


Related Topics




Engine technology, Engine components, Internal combustion piston engines, Engine fuel system technology, Engines


Application Date


Grant Date



Related Topics

Engine technology, Engine components, Internal combustion piston engines, Engine fuel system technology, Engines



Latest Transonic Combustion News

Green Car Congress: Transonic Combustion closes $32M Series D round

Nov 26, 2012

Transonic Combustion closes $32M Series D round 8 November 2012 Transonic Combustion Inc., a company focused on developing a supercritical fuel injection system for internal combustion engines ( earlier post ), closed a $32-million Series D Round of funding. This $32-million round of financing puts Transonic Combustion on strong footing to continue to execute, deliver and expand development of our product and meet customer commitments. Already achieving early customer successes, this funding will ensure we continue to accelerate advancement of our core product and capitalize on the growing demand for increased fuel efficiency and emission reductions. —Wolfgang Bullmer, CEO and President Earlier this year Transonic reported demonstrating its fuel efficient supercritical (SC) fuel injection and combustion system—Transonic Combustion, or TSCi—using gasoline fuel at low load without EGR, medium load with EGR, and high speed low load with EGR. Using engine test data, Transonic simulated vehicle fuel consumption for a vehicle over the NEDC drive cycle using a 4-cylinder, 1.6L engine. Predicted fuel economy for such a vehicle equipped with the TSCi system was 48.8 mpg US (4.8 L/100km): 4.7% better than a diesel engine (46.6 mpg US/5.05 L/100km) and 24.8% better than the vehicle equipped with 2.0L port fuel injected spark ignition engine (39.1 mpg US/6.0 L/100km). The company is backed by Venrock, Khosla Ventures, Rustic Canyon and Saints Capital.

Transonic Combustion Frequently Asked Questions (FAQ)

  • When was Transonic Combustion founded?

    Transonic Combustion was founded in 2006.

  • Where is Transonic Combustion's headquarters?

    Transonic Combustion's headquarters is located at 461 Calle San Pablo, Camarillo.

  • What is Transonic Combustion's latest funding round?

    Transonic Combustion's latest funding round is Series D.

  • How much did Transonic Combustion raise?

    Transonic Combustion raised a total of $44M.

  • Who are the investors of Transonic Combustion?

    Investors of Transonic Combustion include Khosla Ventures, Rustic Canyon Partners, Venrock and Saints Capital.

  • Who are Transonic Combustion's competitors?

    Competitors of Transonic Combustion include Achates Power and 1 more.

Compare Transonic Combustion to Competitors

Achates Power Logo
Achates Power

Achates Power has developed an internal combustion engine that the company says increases fuel efficiency, reduces greenhouse gas emissions and does so at lower cost. Specifically, the company is a developer of opposed-piston, two-stroke, compression ignition engines for use in commercial and passenger vehicles.


EcoMotors is commercializing the opoc (Opposed-Piston Opposed-Cylinder) engine for use in GenSets, commercial vehicles, cars, light trucks, aerospace, marine, agriculture, auxiliary power units, etc. This design creates an internal combustion engine family architecture that will run on a number of different fuels, including gasoline, diesel and ethanol. The opoc's opposed piston-opposed cylinder direct gas exchange operation provides the emissions benefit of 4-cycle engines, the simplicity benefits of 2-cycle engines, the power density of the less well known opposed piston engine, and the developments in computer and thermodynamics all tied together in a new engine architecture. It comprises two opposing cylinders per module, with a crankshaft between them, each cylinder has two pistons moving in opposite directions. This design configuration eliminates the cylinder-head and valve-train components of conventional engines, offering an efficient, compact and simple core engine structure. The result is an engine family that is lighter, more efficient and economical, with lower exhaust emissions.

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