Weifang 490 Series Engine

This series is a straight-four cylinder, water-cooled, four-stroke, naturally aspirated diesel engine with a cylinder diameter - stroke of 90mm x 115mm, an engine displacement of 3.26L. It uniformly adopts an electric starting method, rotating counterclockwise (towards the flywheel end as viewed), suitable for different working conditions and speed requirements. The following is an introduction to the details of 4 configurations:
1. 490C General Basic Diesel Engine
Core parameters
Type: Straight, water-cooled, four-stroke, naturally aspirated
Number of cylinders: Four
Cylinder diameter x stroke: 90 x 115mm
Displacement: 3.26L
Compression ratio: 19:1
Rated power / speed: 38kW / 2400r/min
Maximum torque / speed: 186Nm / 1680r/min
Fuel consumption rate: ≤ 258.4g/kw.h
Oil volume: 12L
Net weight: 340kg
Overall dimensions: 980 x 690 x 930mm Product features
General basic model, with a mature and reliable structure, suitable for general light-load scenarios such as small construction machinery, agricultural machinery, and fixed power equipment. The 2400r/min high-speed standard is set, featuring fast power response, convenient maintenance, and is a cost-effective choice for multi-scenario general power.
2. 490D generator set dedicated diesel engine
Core parameters
Type: Inline, water-cooled, four-stroke, naturally aspirated
Number of cylinders: Four
Cylinder diameter × stroke: 90 × 115mm
Displacement: 3.26L
Compression ratio: 19:1
Rated power / speed: 21kW / 1500r/min
Maximum torque / speed: 186Nm / 1680r/min
Fuel consumption rate: ≤ 258.4g/kw.h
Oil volume: 12L
Net weight: 340kg
Overall dimensions: 980 × 690 × 930mm Product features
A low-speed calibrated model specifically optimized for generator sets, featuring a constant 1500r/min design, suitable for small backup / regular generator sets. It operates stably, has strong load adaptability, and exhibits excellent fuel consumption control under low-speed conditions, making it suitable as a backup power source for households, construction sites, and small commercial scenarios.
3. 490P Enhanced Performance Diesel Engine
Key Parameters
Type: Inline, water-cooled, four-stroke, naturally aspirated
Number of cylinders: Four
Cylinder diameter × Stroke: 90 × 115mm
Displacement: 3.26L
Compression ratio: 19:1
Rated power / Speed: 38kW / 2400r/min
Maximum torque / Speed: 186Nm / 1680r/min
Fuel consumption rate: ≤ 258.4g/kw.h
Oil capacity: 12L
Net weight: 450kg
Overall dimensions: 1280 × 690 × 930mm Product features
Strengthen the specialized models for specific working conditions, upgrading the structural strength based on the general models, to adapt to long-term continuous operation and heavy-load fluctuating conditions, such as engineering equipment and agricultural machinery. With a higher net weight and a longer body size, it offers stronger stability and heat dissipation capacity, enabling it to cope with harsh working environments, and has more prominent reliability and durability.
4. 490G General Power Diesel Engine
Core Parameters
Type: Inline, water-cooled, four-stroke, naturally aspirated
Number of cylinders: 4
Cylinder diameter × stroke: 90 × 115 mm
Displacement: 3.26 L
Compression ratio: 19:1
Rated power / speed: 38 kW / 2400 r/min
Maximum torque / speed: 186 Nm / 1680 r/min
Fuel consumption rate: ≤ 258.4 g/kw.h
Oil volume: 12 L
Net weight: 340 kg
Overall dimensions: 980 × 690 × 930 mm Product features
The General Dynamics model has the same performance parameters as the 490C, and is suitable for various general power needs, such as small vessels, fixed power equipment, agricultural machinery, etc. The lightweight design combined with a mature structure ensures both power output and installation compatibility, making it a universal solution for small power scenarios.
Additional explanation
All models in the series uniformly adopt water-cooling cooling and electric starting methods, which are convenient for maintenance and have strong adaptability.
The core differences among different configurations lie in: speed calibration (1500/2400 r/min), structural strength and working condition adaptation. They can be flexibly selected according to the specific requirements of power generators / construction machinery / general power.