The B/FL413F series air-cooled diesel engine is a high-speed four stroke, V-shaped, 90 ° cylinder bank angle, direct injection type ω - type (or inclined cylinder type) combustion chamber, and two-stage combustion system. Adopting a gantry style crankcase and a one cover structure for each cylinder. The crank connecting rod structure is a multi support three-layer alloy sliding bearing with a middle thrust crankshaft. Parallel connecting rod and oil cooled piston with three sealing rings. The B/FL513 series air-cooled diesel engine inherits the advantages of the B/FL413 series air-cooled diesel engine, and makes targeted improvements to the problems found in the use of the B/FL413 series air-cooled diesel engine, and timely adds the application of new technologies according to technological progress.
Model | Bore/Stroke (mm) | Capacity(L) | Compression Ratio | Rotational Speed (rpm) | Rated Power/Speed (KW) | Max.Torque (N.m/rpm) | Idling Speed (rpm) | Specific Fuel Consumption (g/kw·h) | Dimensio (L×W×Hmm) | Net Weight(kg) |
F4L413FR | 125/130 | 6.381 | 18:1 | 1500~2500 | 51~94 | 408 | 600 | 223 | 1150*731*1036 | 550 |
F6L413FR | 125/130 | 9.572 | 18:1 | 1500~2500 | 77~141 | 613 | 600 | 223 | 1452*752*1012 | 740 |



