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  • Perkins 402D-05; A Small and Versatile I-2 Diesel Engine

Perkins 402D-05; A Small and Versatile I-2 Diesel Engine

“Diminutive but Dependable” Best Describes this Generator-Focused, 0.5L, I-2 Diesel

John Lehenbauer
Sep 1, 2016
Photographers: Manufacturer
Perkins Engines has been building high-speed diesel engines for more than 80 years. F. Perkins Limited’s (the firm’s original corporate name) first high-speed engine was a four-cylinder unit called the Vixen. Prior to the Vixen’s debut in 1932, diesels were known to be heavy, slow-revving, under-performing workhorses. This new oil-burner was initially developed to be on par with gas engines and used as a primary automotive powerplant. The next few years saw the evolution of larger-displacement, more powerful engines that were designed to fit customers’ needs. In 1935, Perkins used these advancements to become the first company to hold six automotive-diesel world speed records.
Early innovations in high-speed diesel technology were the foundation for the company’s continued success through the years. Now, as a part of Caterpillar Incorporated, Perkins is one of the world’s leading off-highway engine suppliers, building a variety of powerplants that range in displacement from 0.5L to 18.1L.
Photo 2/4   |   Rear Side Starter Intake
At the lower end of Perkins’ diesel spectrum is the 402D-05. This industrial I-2 engine displaces 0.5L and makes a whopping 14 hp and 22 lb-ft of torque. Innovations in the tiny diesel’s cylinder and intake design have enhanced its reliability and durability, while making it smooth-running with minimum noise levels. These advancements also help extend service intervals by up to 500 hours. Weighing only 126 pounds (dry) and just 16 inches in length, the small size and light weight make the 402D-05 a very versatile powerplant that’s ideally suited for such machines as RigMaster Power’s standalone and truck-mounted auxiliary power units.
Like many smaller-displacement diesels, the Perkins 402D-05 is naturally aspirated. The engine utilizes a higher compression ratio of 23.5:1 to help offset the lack of forced induction. To maximize the efficiency of the higher compression, the fuel system uses an indirect injection process, in which fuel is initially injected into a pre-combustion chamber. By using this method, fuel is ignited at a slower rate, creating a more even and complete burn at a lower temperature, which reduces noise, emissions, and fuel consumption while increasing power output. The dynamic combustion of the 402D allows it to meet EPA Tier 4 Interim and EU Stage IIIA emissions standards.
Photo 3/4   |   Rear Side Filters Oil Fuel
SPECIFICATIONS
Engine: Perkins 402D-05
Displacement: 0.51L (31 ci)
Engine Layout: I-2
Valvetrain: DOHC
Bore x Stroke: 2.6 x 2.8 inches (67 x 72mm)
Compression Ratio: 23.5:1
Head material: Iron
Block material: Cast-iron
Piston material: Cast-aluminum
Power: 13.7 hp at 3,600 rpm
Torque: 21.9 lb-ft at 2,400 rpm
Induction: Naturally aspirated
Exhaust: Cast-iron manifolds
Intercooler: N/A
Cooling System: Liquid cooled
Coolant Capacity: 0.3 gallons
Fuel System: Indirect injection
Lubrication System: Wet sump
Lubrication Capacity: 4 quarts
Dry Weight: 126 pounds
Length: 16 inches
Width: 14.6 inches
Height: 20.6 inches
Photo 4/4   |   Front Fan Pulleys

Sources

Perkins Engines
www.perkins.com

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