Weichai Group

WP4.1N series truck engine

Product portfolio

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

WP4.1NQ190E50 4.088 4 140/2600 680/1300-1900 ≤200 CR+SCR
Cargo trucks
dump trucks
Sanitation trucks
mixer trucks
truck-mounted cranes

WP4.1NQ200E62 4.088 4 147/2300 750/1300-1700 ≤195 CR+DOC+DPF+Hi-SCR Cargo trucks
dump trucks
Sanitation trucks
mixer trucks
truck-mounted cranes

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: small in size, ensuring the easy assembling in OEM.

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.

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 and the domestic advanced anechoic chamber are used to reduce noise.

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
WP4.1NQ190E50	4.088	4	140/2600	680/1300-1900	≤200	CR+SCR	Cargo trucks dump trucks Sanitation trucks mixer trucks truck-mounted cranes
WP4.1NQ200E62	4.088	4	147/2300	750/1300-1700	≤195	CR+DOC+DPF+Hi-SCR	Cargo trucks dump trucks Sanitation trucks mixer trucks truck-mounted cranes