The 4BTA3.9-M is a four-cylinder, inline engine with a displacement of 3.9 liters (238 cubic inches).
It is part of the Cummins B Series engine family, known for its efficiency and power. The engine features a bore of 102 mm (4.02 inches) and a stroke of 120 mm (4.72 inches), resulting in a total piston displacement of 3,900 cc (239 cubic inches).
The 4BTA3.9-M operates on the four-stroke combustion cycle, which includes intake, compression, combustion, and exhaust strokes. It uses a direct injection fuel system to deliver precise amounts of fuel into the combustion chamber, ensuring efficient combustion and power generation. The engine is also turbocharged, which means it utilizes a turbocharger to increase the intake air density, resulting in improved performance and responsiveness.
In terms of power output, the 4BTA3.9-M delivers up to 99 kW (132 horsepower) at 2,500 revolutions per minute (RPM). It also generates a maximum torque of 470 Newton-meters (347 pound-feet) at 1,500 RPM. This torque characteristic allows the engine to handle heavy workloads and maintain consistent performance across a wide range of operating conditions.
The engine features a water-cooling system, which uses a radiator and coolant to dissipate heat generated during operation. This ensures that the engine stays within optimal temperature limits, promoting longevity and reliability. Additionally, the 4BTA3.9-M incorporates a dry-type replaceable element air cleaner to prevent dust and debris from entering the engine and causing damage.
The 4BTA3.9-M is designed to meet various emission regulations, including Tier 2 and Stage II standards.
It achieves this through the use of advanced technologies such as an exhaust gas recirculation (EGR) system and an integrated wastegate turbocharger. These features help reduce emissions while maintaining engine performance.
The engine's compact size and weight make it suitable for a wide range of applications. It is commonly used in industrial machinery, such as generators, water pumps, and compressors. It is also found in agricultural equipment like tractors and harvesters, as well as in marine vessels and construction machinery.
