Features & Benefits

  • Designed and developed on ECI (Econtrols) technology platform to provide the flexible power solution for buses and coaches, they share main components and parts with diesels versions, while inheriting all the super advantages.
  • Quality imported electronic gas feed system, ignition system and engine management system kits.
  • Platinum electrode spark plug- Give the most efficient combustion and extend performance life.
  • Specifically built intake & exhaust system, fuel system are designed and configured for gas engine.
  • Oxygen sensor- Achieve precise control over the air/ fuel ratios, providing the best fuel economy while reducing emission dramatically.
  • Closed-loop control system-Achieve closed-loop performance across wide operating range and self-diagnostic function.
  • Intelligent electronic control system- Complete in functionality.
  • Smooth gentle combustion- Give you the best comfort ride with less noise and vibration.
  • Oxidation catalyst- Easily meeting Euro 3 levels of performance,
    and be able to move to Euro 4, Euro 5.
  • Highly human-oriented and easily interchangeable design, allowing for ease of maintenance.

Technical Specifications

Engine Model YC6MK290N-40 YC6MK320N-40 YC6MK340N-40 YC6MK375N-40
Number of Cylinders 6
Valves per Cylinder 4
Displacement (L) 10.34
Bore × Stroke (mm) 123×145
Aspiration Turbocharged, inter-cooled
System ECI
Fuel CNG (Compressed Natural Gas) / LNG (Liquefied Natural Gas)
Rated Power / Speed (kW/r/min) 214/2100 236/2100 250/2100 276/2100
Peak Torque / Speed (N.m/r/min) 1220/1200~1500 1300/1200~1500 1350/1200~1500 1500/1200~1500
Min. gas consumption with full load (g/kW.h) ≤192
Noise (ISO3744) dB(A) ≤93
Emissions Euro 4
Dry weight 880
Application 12-13.7m coaches, double-deck urban buses, BRT;


Two new EU Stage V engines from Yuchai now available!

7. August 2020

Target over 3.5 billion yuan over 5 years! Yuchai´s introduction of new energy products

26. August 2019

Opening of the Yuchai Machinery R&D Center in Europe

25. September 2017