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Products & ServiceBus engines

WP4.1N series bus engine

 

Product parameters

Mode

Displacement
(L)

Number of valves per cylinder

Rated power/speed
(kW/rpm)

Maximum torque/speed
(N.m/rpm

Min. fuel consumption on external characteristic curve
(g/kW·h)

Technical route

 

Applicable model

WP4.1NQ170E50

4.1

4

125/2600

600/1300-1900

195

Common rail + SCR

7.5–8M passenger buses、8–9M public buses、school buses

WP4.1NQ190E50

4.1

4

140/2600

680/1300-1900

195

Common rail + SCR

7.5–8M passenger buses、8–9M public buses、school buses

WP4.1NQ170E61

4.1

4

125/2600

600/1300-1900

195

EGR + DOC + DPF + SCR

7.5–8M passenger buses、8–9M public buses、school buses

WP4.1NQ190E61

4.1

4

140/2600

680/1300-1900

195

EGR + DOC + DPF + SCR

7.5–8M passenger buses、8–9M public buses、school buses

Product advantages

Power performance

  • For WP4.1N engine, its power per liter is 34kW/L and its torque per liter is 166N.m/L; for WP4.6N engine, its power per liter is 35kW/L and its torque per liter is 174N.m/L.
  • Reliability

  • B10 life is 800,000km.
  • Safety

  • The standard Weichai brake system — WCBS has a braking power up to 70kW, ensuring higher power, shorter braking distance, and better safety. Intelligent electronic control: Weichai ECU is used.
  • Adaptability

  • The heights of rear PTO and fan are adjustable, and the structure for equipping multiple alternators and A/C is optional; WP4.1N and WP4.6N parts are highly universal. 
  • Good comfort

  • The vibration damping web and the secondary balance mechanism guarantee low vibration and noise.
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    R & D

    20000 +
    Global R & D personnel
    5+10 
    R & D institutions in five countries, ten regions

    Engines

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