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Ricardo to support Clean Air Power’s first production-intent MicroPilot natural gas engine project

Following the successful conclusion of the concept study with a global truck manufacturer announced in February 2014, the collaboration between Clean Air Power and Ricardo will now move on to commence the first phase of a production development of a diesel-natural gas engine based on Clean Air Power’s MicroPilot technology (earlier post), targeted at South East Asian and other markets.

MicroPilot is based on the use of smaller diesel pilot injections representing 1-2% of the total fuel to reduce NOx emissions by more than 80%, while also reducing CO2 emissions.

This first phase of the program is targeted to commence in September 2014 and will last six months. If successful, the program will then enter a second phase with the objective to bring a MicroPilot diesel-natural gas engine for the South East Asian and other markets to the start of production in 2017.

Clean Air Power will continue to be supported by Ricardo as part of the co-operation agreement signed in September 2013.

Our client is a progressive, global truck manufacturer with a bold ambition for the future application of compression-ignited natural gas engines. Its commitment to move ahead with this next phase demonstrates the quality of our technology and the value that our relationship with Ricardo can bring to OEM partners. Our ambition is to become a global design, development and delivery partner of compression-ignited natural gas engines and we are excited about the potential of this latest success to open the door to other OEMs partnerships.

—Clean Air Power CEO John Pettitt


  • Azimov, U., Tomita, E., and Kawahara, N. (2011) "Ignition, Combustion and Exhaust Emission Characteristics of Micro-pilot Ignited Dual-fuel Engine Operated under PREMIER Combustion Mode,” SAE Technical Paper 2011-01-1764, 2011, doi: 10.4271/2011-01-1764


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