Diesel engine 404A-22G

4-cylinderin-linefor generator sets

Overview The Perkins 404A-22G is a compact 4-cylinder, 2.2 L diesel engine designed for generator set applications. It delivers low noise and vibration (NVH) with reliable cold-start capability and fuel-optimised emissions performance, making it suitable for unregulated and EU Stage IIIA / U.S. EPA Tier 4 interim territories.

Key Specs

• Gross Mechanical Output: 18–20 kWm
• Typical Electrical Output: 20–22 kVA (16–18 kWe)
• Rated Speed: 1500 rpm
• Emissions: Fuel optimised

Features At A Glance

• Low ownership cost: reliable components, good fuel economy and straightforward installation; optional aftertreatment available.
• Quiet, refined operation: 4‑cylinder refinement reduces noise for urban or noise-sensitive installations while providing 20–40 kVA generator capability across the 404 range.

50 Hz Typical Electrical Output

• Prime: 20 kVA
• Standby: 22.1 kVA

General

• Number of Cylinders: 4 inline
• Bore x Stroke: 84 mm x 100 mm
• Displacement: 2.2 L
• Compression Ratio: 23.3:1
• Aspiration: Naturally aspirated
• Combustion System: Indirect injection
• Rotation from Flywheel End: Anti-clockwise
• Cooling System: Liquid
• Typical Alternator Efficiency: 87%
• Switchable: No

ElectropaK Dimensions

• Length: 948 mm
• Width: 498 mm
• Height: 841 mm
• Dry Weight: 242 kg

Standard Equipment

• Air inlet system: Mounted air filter
• Control system: 12 V Electronic Shut Off Solenoid (ESOS) energised to run; 12 V starter motor; 12 V 15 A alternator with DC output; glow plug cold start aid and heater/starter switch; oil pressure and coolant temperature switches
• Cooling system: Thermostatically controlled with belt-driven coolant pump and pusher fan; mounted radiator, piping and guards
• Flywheel & housing: SAE 4 long flywheel housing; high inertia flywheel to SAE J620 Size 190.5 mm (7½ in)
• Fuel system: Mechanically governed cassette-type fuel injection pump; split element fuel filter
• General: Front and rear engine mounting brackets
• Oil system: Spin-on full flow lubrication oil filter; wet steel sump with filler and dipstick

Technical specifications

• Model: 404A-22G
• Brand: Perkins
• Gross Mechanical Output: 18–20 kWm
• Typical Electrical Output: 20–22 kVA (16–18 kWe)
• Rated Speed: 1500 rpm
• Emission Standard: Fuel optimised
• Prime Power (50 Hz): 20 kVA
• Standby Power (50 Hz): 22.1 kVA
• Number of Cylinders: 4 inline
• Bore x Stroke: 84 mm x 100 mm
• Displacement: 2.2 L
• Compression Ratio: 23.3:1
• Aspiration: Naturally aspirated
• Combustion System: Indirect injection
• Rotation from Flywheel End: Anti-clockwise
• Cooling System: Liquid
• Typical Alternator Efficiency: 87%
• Switchable: No
• ElectropaK Dimensions (L x W x H): 948 mm x 498 mm x 841 mm
• ElectropaK Dry Weight: 242 kg