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List of KIMM TechnologiesEco-friendly Energy & Environment Research Division

Technology for Duel Fuel (Diesel–Natural Gas) Engine with 425 PS

Division Eco-friendly Energy & Environment Research Division > Department of Mobility Power Research
Name Dr. Changup Kim
Department Department of Engine Research
Tel +82 - 42 - 868 - 7376
E-mail cukim@kimm.re.kr
Attachment Download 121_Technology_for_Duel_Fuel_(Diesel_Natural_Gas)_Engine_with_425_PS.pdf (0.6 KB)

Dual-fuel engine technology that uses diesel and compressed natural gas (CNG) fuel at modified conventional diesel engine for various purposes.



Client / Market

  • Diesel-CNG duel-fuel car, diesel-CNG duel-fuel engine generator, special purpose machinery such as heavy equipment


Necessity of this Technology

  • To overcome drawbacks of diesel engine, many studies on using clean low-carbon fuels has been done in diesel engines. In particular, for various environmental issues, the application of the diesel-gas fuel engine that combines the diesel fuel with low-carbon gas is being expanded.
  • However, consumers may experience inconvenience due to the lack in number of CNG filling stations when fueling the engine through the natural gas fuel system,


Technical Differentiation

  • The technology adds the CNG fuel supply and control apparatus to conventional fuel supply system in diesel engine to realize the dual fuel combustion. Due to high replacement ratio of CNG fuel to diesel fuel, approximately 10 million won can be saved in fuel cost after 1-year operation. Even when all CNG fuel has been exhausted, the system automatically switches to use diesel fuel only that engine can be operated in normal even in the shortage of CNG fuel,
  • The reduction in fuel cost can be obtained when realizing high gas fuel replacement ratio, which is achieved with the multi point injection (MPI) and the precise fuel injection control technology that supplies and distributes gas fuel to each combustion chamber of the engine.
  • Dual fuel engine that realizing simultaneous combustion of diesel fuel and CNG fuel can reduce exhaust gas emission, while maintaining engine performance. Over 20% of CO2 emissions, a greenhouse gas, can be reduced.
  • We already obtained modifying technology for up-to-date diesel-CNG dual fuel vehicle, that is, localized technology for CNG fuel supply system, engine remodeling and ECU production technology for various vehicles. Also, the development period for a new vehicle is very short by using the mapping data and precision control algorithm that is already obtained from the dual fuel engine experiment



Excellence of Technology

  • An electronic control system and CNG fuel supply system considers the characteristics of CNG fuel are developed for same time combustion of diesel and CNG fuel.
  • Fuel replacement ratio: Over 70%
  • Fuel cost reduction rate: Over 30% (compared to diesel fuel consumption)
  • Maximum engine output: 425/1800 (ps/rpm) (same as for a diesel engine) Satisfies EURO-5, 6 for gas emission standard



Current Intellectual Property Right Status

  • Temperature Control System for Natural Gas Which is Applied to Heterogeneous Fuel Engine (KR2014-0111307)
  • Fuel Supply Apparatus for Diesel Gas Dual Fuel Engine (KR1471167)
  • Fuel Supply Apparatus for Dual Fuel Diesel Engine with Mechanical Fuel Pump (KR1398096)