FAWDE 4DW engine series diesel engine for genset

4DW Generating Set Engine

The FAWDE 4DW engine series is a proven, high-performance diesel power solution for small and medium generator sets worldwide. Designed and manufactured by FAWDE, the 4DW engine delivers outstanding fuel economy, long service life, and reliable operation in demanding environments. It is widely applied in residential standby generators, mobile gensets, and light industrial power systems.

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SPECIFICATION TECHNICAL CHARACTERISTICS

Technical Overview of the 4DW Engine

The 4DW series features a four-cylinder, four-stroke, inline diesel engine with water cooling and natural or turbocharged air intake options. Each model provides stable power output for 17 kW to 31 kW generator sets, making it ideal for small commercial or emergency applications.

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4DW Engine Specifications

Rated speed: 1500rpm

Engine model	4DW81-23D	4DW91-29D	4DW92-35D	4DW93-42D
Type	4-cylinder 4-stroke
Air intake type	Natural	Natural	Turbocharged	Turbo& intercool
Cooling mode	Water cooling
Governor mode	Mechanical& electronic
Bore×Stroke(mm）	85×100	90×100
Compression ratio	18.5:1
Rated speed(rpm)	1500
Displacement(L)	2.27	2.54
Rated power(without fan)(kW)	17	21	26	31
Standby power(without fan)(kW)	19	23	29	34
Fuel consumption(g/kWh)	240	240	230	216
Oil consumption(L/h)	0.05	0.05	0.04	0.04
Steady state speed regulation(%)	≤5	≤5	≤5	≤5
Oil capacity including filter(L)	7.8	8	8	8
Emission compliant	StageⅡ
The flywheel shell interface	SAE4
The flywheel shell interface	Flywheel for 7.5″& 10″flexible coupling
Dry weight of base(kg)	220	220	240	240
Dry weight of Gen Pac(kg)	240	240	260	280
Overall dimension(base)(mm)	750×555×680	750×555×680	750×600×735
Overall dimension(G.P)(mm)	920×610×760		1120×810×760
Fan consumption（kW）	1.2	1.6	1.8	2
27℃ air consumption（m3/min）	1.4	1.7	2.1	2.4
Heat rejection of exhaust（kW）	17.2	17.4	20.6	23.1
Exhaust gas temperature after turbine（℃）	550	450	450	450
Exhaust gas flow（m3/min）	4.2	4.6	5.9	6.7
Heat rejection from engine（kW）	1.1	1.3	1.6	1.9
Heat rejection of coolant（kW）	11	13.7	16.9	17.1
Base configuration	Standard configuration(add on the base)
Engine with fan	Intake and exhaust sysytem: Air filter and connecting pipes; Connecting flang of exhaust pipe
Alternator 500W 14V Starter motor 3.5kW 12V	Cooling system: Radiator with connecting pipes; Fan guard; Belt guard

Rated speed: 1800rpm

Engine model	4DW81-28D	4DW91-38D	4DW92-42D	4DW93-50D
Type	4-cylinder 4-stroke
Air intake type	Natural	Natural	Turbocharged	Turbo& intercool
Cooling mode	Water cooling
Governor mode	Mechanical or electronic
Bore×Stroke(mm）	85×100	90×100
Compression ratio	18.5:1
Rated speed(rpm)	1800
Displacement(L)	2.27	2.54
Rated power(without fan)(kW)	20	28	31	37
Standby power(without fan)(kW)	22	31	34	41
Fuel consumption(g/kWh)	240	240	230	216
Oil consumption(L/h)	0.05	0.05	0.04	0.04
Steady state speed regulation(%)	≤5 or ≤3
Oil capacity including filter(L)	7.8	8	8	8
Emission compliant	StageⅡ
The flywheel shell interface	SAE4
The flywheel shell interface	Flywheel for 7.5″flexible coupling
Dry weight of base(kg)	220	220	240	240
Dry weight of Gen Pac(kg)	240	240	260	280
Fan consumption（kW）	2	2	2	2.2
Base configuration	Standard configuration(add on the base)
Engine with fan	Intake and exhaust sysytem: Air filter and connecting pipes; Connecting flang of exhaust pipe
Alternator 500W 14V Starter motor 3.5kW 12V	Cooling system: Radiator with connecting pipes; Fan guard; Belt guard

Performance and Fuel Efficiency

Thanks to FAWDE’s optimized combustion and fuel injection design, the 4DW diesel engine achieves a perfect combination of performance and economy. With fuel consumption rates as low as 235–240 g/kWh, operators can expect reduced operating costs over the engine’s lifetime.

In addition, high torque output across the speed range ensures reliable power generation even under heavy electrical load conditions.

Key Technical Features

● High Efficiency: The 4DW engine is designed with a focus on efficiency, ensuring optimal fuel consumption and power output. This feature makes it a cost-effective solution for various power generation needs.

● Robust Construction: The engine boasts a robust and durable construction, capable of withstanding challenging operating conditions. This durability contributes to the engine's long lifespan and reduced maintenance requirements.

● Low Emissions: In compliance with environmental standards, the 4DW engine is equipped with advanced emission control technologies, resulting in lower emissions of pollutants. This makes it an environmentally friendly choice, aligning with modern sustainability goals.

● Adaptability: The 4DW engine is engineered for versatility, allowing seamless integration into diverse power generation setups. Its adaptability makes it suitable for a wide range of applications, from industrial to residential use.

● Advanced Control Systems: Equipped with cutting-edge control systems, the 4DW engine offers precise monitoring and management of key parameters. This ensures optimal performance, efficiency, and safety during operation.

● Reliable Power Output: The engine is designed to deliver a consistent and reliable power output, making it a dependable source of energy for critical applications. This reliability is essential for sectors where uninterrupted power is paramount.

● Ease of Maintenance: The 4DW engine is engineered with user-friendly maintenance features, simplifying routine checks and service procedures. This contributes to reduced downtime and overall operational efficiency.

Why Choose FAWDE 4DW Engine

→ Proven performance across more than 100 countries

→ Excellent balance between power output and fuel efficiency

→ Compact design suitable for small generator enclosures

→ Competitive total cost of ownership

→ Supported by FAW’s global after-sales and parts network

FAWDE continues to invest in R&D for diesel engine innovation, ensuring every 4DW engine meets international standards for emissions, performance, and reliability.