WP2.5N series bus engine
weichai bus engines, with the displacement ranging from 2.3L to 12L and the power ranging from 88kW to 338kW, meet Euro V, Euro VI and other emission standards, and are applicable to various buses with a length greater than 5m such as school buses, passenger buses, private buses, touring buses, public buses, hybrid electric buses, and special buses. These new-generation products (WP2.3N/WP2.5N/WP3N/WP4.1N/WP4.6N) are applicable to rural public buses, minibuses, long-nose school buses, high-end MPVs, European light buses, and characterized by high reliability, strong power, fuel saving and environmental protection.
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Product portfolio A
| 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 |
| WP2.5NQ155E62A | 2.49 | 4 | 114/2900 | 380/1400-2200 | ≤195 | CR+DOC+DPF+Hi-SCR | 6-6.7m city bus |
| WP2.5NQ155E62 | 2.49 | 4 | 114/2900 | 400/1400-2200 | ≤195 | CR+DOC+DPF+Hi-SCR | 6-6.7m city bus |
| WP2.5NQ170E62A | 2.49 | 4 | 125/2900 | 450/1200-2200 | ≤195 | CR+DOC+DPF+Hi-SCR | 6-6.7m city bus |
| WP2.5NQ170E62 | 2.49 | 4 | 125/2900 | 500/1400-2800 | ≤195 | CR+DOC+DPF+Hi-SCR | 6-6.7m city bus |
Product spectrum B
| model | Displacement ( L ) | Number of valves per cylinder | Rated power/speed (kW/rpm) |
Maximum torque/speed (N · m/rpm) |
External minimum fuel consumption (g/kW·h) |
Technical route | Suitable models |
| WP2.5NQ155E62 | 2.5 | 4 | 110/3200 | 400/1400～2200 | 195 | CR+DOC+DPF+Hi-SCR | 6-8m school bus 6-7m light passenger car |
| WP2.5NQ160E61 | 2.5 | 4 | 118/3200 | 450/1400～2200 | 195 | CR+DOC+DPF+Hi-SCR | 6-8m school bus 6-7m light passenger car |
| WP2.5NQ165E62 | 2.5 | 4 | 114/2900 | 380/1400-2200 | 195 | CR+DOC+DPF+Hi-SCR | 6-8m school bus 6-7m light passenger car |
| WP2.5NQ170E62 | 2.5 | 4 | 114/2900 | 400/1400-2200 | 195 | CR+DOC+DPF+Hi-SCR | 6-8m school bus 6-7m light passenger car |
| WP2.5NQ180E62 | 2.5 | 4 | 120/2900 | 450/1400-2200 | 195 | CR+DOC+DPF+Hi-SCR | 6-8m school bus 6-7m light passenger car |
Product advantages
- Emission standards: Euro V/VI.
- Powerful: High torque: 380N•m, output torque at low speed: 245N•m.
- Economy: Minimum fuel consumption: 200g/(kW·h).
- Comfort: The customized development of NVH ensures low noise and vibration.
- Universality: The BOSCH system is used in the fuel system, which guarantees the maximum universality of parts.
- Light weight: Its applies a large number of cast aluminum parts and weighs 230kg, which is the lightest one among those products of same power.
- Small size: The engine is 810mm long, ensuring the easy assembling in OEM.
More safe and reliable
- The movement speed of moving parts is reduced, and the movement time is prolonged.
- The wear of friction pairs per unit time is reduced.
- The service life of the crankshaft flywheel system and gear system is prolonged.
- The engine block, piston, bearing shell, etc. are improved comprehensively, and B10 life is 800,000 km.
Better economy
- The speed ratio of drivetrain is reduced, improving transmission efficiency.
- The driver‘s shift schedule is improved, reducing fuel consumption.
More comfortable
- The high frequency torsional vibration zone of the engine is avoided.
- The noise reduction flywheel housing is used and its noise level is 92d(B) under common operating conditions.
WP2.5N series bus engine
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