WP4.6N 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 parameters 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 |
| WP4.6NQ220E50 | 4.58 | 4 | 162/2300 | 800/1200-1800 | ≤200 | CR+SCR | 8-9m city bus 8-8.5m coach 10-12m school bus |
| WP4.6NQ240E62 | 4.58 | 4 | 177/2300 | 850/1300-1600 | ≤188 | CR+DOC+DPF+Hi-SCR | 8-9m city bus 8-8.5m coach 10-12m school 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 |
| WP4.6NQ200E62 | 4.6 | 4 | 147/2300 | 750/1200-1800 | 188 | Common Rail + Hi-SCR | 8.0-8.5m passenger transport, 10-12m school transfer, 9.0-10.5m bus |
| WP4.6NQ220E62 | 4.6 | 4 | 162/2300 | 850/1300-1600 | 188 | Common Rail + Hi-SCR | 8.0-8.5m passenger transport, 10-12m school transfer, 9.0-10.5m bus |
Product advantages
- Emission standards: Euro V and Euro VI.
- Technical route: The electronically controlled high-pressure common rail system is used to ensure precise control.
- Comfort: The customized development of NVH ensures low noise and vibration.
- Light weight: Its applies a large number of cast aluminum parts and is the lightest one among those products of same power.
- Small size: The engine is smaller than competing products in size, ensuring the easy assembling in OEM.
- Electronic control system: The independent ECU control system with functions developed for light-duty trucks ensures good adaptability.
- Low-pressure circuit: It ensures electronically controlled fuel pumping, good low temperature starting performance, and strong fuel adaptability.
- Intake system: The four-valve structure guarantees high intake efficiency and more efficient combustion.
- Cooling system: The WEICHAI electromagnetic clutch fan and silicone oil clutch fan are optional, which ensure good cooling effect.
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.
Better economy
- The speed ratio of drivetrain is reduced, improving transmission efficiency.
- Fuel system: The fresh air system guarantees good reliability and excellent economy.
- The driver‘s shift schedule is improved, reducing fuel consumption.
- The rear PTO is optional.
More comfortable
- The high frequency torsional vibration zone of the engine is avoided.
- The noise reduction flywheel housing and the domestic advanced anechoic chamber are used to reduce noise.
WP4.6N series bus engine
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