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Products & ServiceBus engines

WP2.3N series bus engine


Product parameters

Mode Displacement
Number of valves per cylinder Rated power/speed
Maximum torque/speed
Min. fuel consumption on external characteristic curve
Technical route Applicable model
WP2.3NQ130E50 2.3 4 96/3200 380/1600-2400 199 Common rail + SCR 5–6M buses、HIACE、light buses、VANs
WP2.3NQ120E61 2.3 4 88/3200 320/1500-2400 199 EGR + DOC + DPF + SCR 5–6M buses、HIACE、light buses、VANs
WP2.3NQ130E61 2.3 4 96/3200 380/1600-2400 199 EGR + DOC + DPF + SCR 5–6M buses、HIACE、light buses、VANs

Product advantages


  • Minimum fuel consumption is 199g/kW•h. The low speed-fuel consumption curve shifts to the middle/low speed zone, and the low fuel consumption zone is wider. 
  • Power performance

  • High torque (output power at medium/low speed range increased), strong power, and excellent starting acceleration performance. 
  • Reliability

  • The brand-new design is adopted, and B10 life is 500,000 km; Weichai premium suppliers develop the relevant products according to the high reliability requirements of the large-displacement engine. The rigorous and thorough bench test, high temperature test, plateau test, low temperature test, and vehicle drum test guarantee the reliability of key parts such as turbocharger, crankshaft, fan, starter, wire harness and air compressor.  
  • Comfort

  • The optimized NVH ensures low noise; the electronically controlled multiple injection technology reduces vibration and noise significantly. 
  • Adaptability

  • The engine can be equipped with various accessories such as alternator, power steering pump, A/C compressor, and air compressor. It features comprehensive configuration and small size and is applicable to light buses, school buses and VANs with a length of 5-6m, and can meet the requirements of different customers for structure and performance.
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    R & D

    20000 +
    Global R & D personnel
    R & D institutions in five countries, ten regions


    • 5,000,000 units
    • 22-10000Ps
    • 200 million kilowatts
    • Application for all markets