Dongfeng Cummins Engine Co., Ltd. was originally established in June 1996 by Dongfeng Motor Corporation and Cummins Inc. with a 50:50 equity ratio.
Dongfeng is one of the largest truck manufacturers in China. Cummins is the world's largest company in the design, manufacture and sale of diesel and CNG engines. Dongfeng Cummins will receive strong support from Cummins global production system in the fields of product development, manufacturing, quality and management, and will continuously improve the competitiveness of enterprises and products. At the same time, the joint venture's export products will also be supported by Cummins' global after-sales service system.
In this article, you will learn Dongfeng Cummins 4B3.9-G2 engine ( used in diesel generator) technical datasheet & standard parts supplied.
DCEC 4B3.9-G2 Engine Technical Datasheet
In-line, 4 Cylinder, 4 Cycle, Aspirate Diesel Engine
Bore x stroke
102 x 120 mm
Genset matching power
Fuel injection pump
AD injection pump
RSV mechanical governor
Steady speed droop
≤1% Electrical Governor
≤6% Mechanical Governor
8 litres (Engine only)
Overall dimension (L x W x H)
765 x 582 x 908 mm
Coolant intake size
Coolant outlet size
Forced water cooling cycle
Standard air intake temperature
Air intake pressure
Standard light diesel
0# or -10# light diesel
Fuel intake temperature
Air intake restriction
Exhaust back pressure
Cummins 4B3.9-G2 Engine Design Characteristic:
Belt drive system: Belt drive system with tensioner offering automatic belt tension.
Maintenance: Both cylinder bore and cylinder head valve guide tube can be repaired by resisting.
Connecting rod: Alloy steel with high strength and inclined cutting.
Crankshaft: Alloy steel with whole bearing supporting and bearing and round corner harden.
Cylinder block: Dragon door style cylinder block without liner and with water pump turbo house resisted.
Fuel system: AD fuel injection pump with electrical governor.
Garret turbocharger: Bypass high efficient turbocharger.
Piston: Silicon- aluminium alloy piston with dual Ni-resist and oil cooling.
Starting function: Be started at -12℃ without assistant installation; Be started at -35℃ with assistant installation.
Fuel consumption: Excellent fuel consumption with B.S.F.C 215g/kw.h.
Construction characteristic: Simple and compact construction, fewer components and light weight.
Note: We are authorized as Dongfeng Cummins diesel generator set OEM (B/C /LSeries engines on power generators are mainly produced by Dongfeng). Power range is from 24KW to 200KW. For alternator selection, we supply original Stamford, Siemens, Leroy-Somer, Shanghai KEPU, Marathon, etc. Genset electronic control module between Deep Sea 7320 (UK) and SmartGen 6110 (China) can be available.
Dongfeng Standard Parts Supplied
Alternator and Starter with 24 V D.C.
Fuel Filter, Oil Filter, Coolant Filter
Oil Pressure Sensor
Coolant Temperature Sensor
Flywheel and Flywheel House
Electrical Governor Actuator
Air Filter Assembly, Air Intake Resistance Indicator, Support and Air Intake Tube.
Muffler and Flexible Tube
Fuel Pre-Filter and Support
Radiator, Fan, Fan Flange and Coolant Tube
Electrical Governor Controller Panel
Cold Starting Equipment: PTC and Air Intake Heater
Heat Exchanger and Sea Water Pump
Instrument Control Panel: Tachometer, Oil Pressure Meter, Coolant Temperature Meter, Oil Temperature Meter, Voltage Gauge, Working Indicator, Warning Indicator, Beeper, Power Switch, Start Switch, Circuit Breaker and Terminal Connection.
Literatures for Engine
Engine Operation and Maintenance Manual, Engine Warranty Handbook, Engine Certificate.
Spare Parts Ordered by Customer
Note: Oil, Diesel Fuel, Coolant Available Recommended by DCEC.