Product Description

The Cummins 4BTA3.9-G11 Generator Drive Engine is a 3.9L, 4-cylinder, turbocharged and aftercooled diesel engine manufactured by Dongfeng Cummins. Delivering 70–80 kW at 1500 rpm and 80–90 kW at 1800 rpm, it is a powerful and fuel-efficient solution for medium-sized generator sets used in residential, commercial, and light industrial power generation.

With its BYC PB direct injection fuel system, electronic governor, and robust Cummins build quality, the 4BTA3.9-G11 ensures low fuel consumption, reliable performance, and long-term durability.

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Specifications

• Engine Model: Cummins 4BTA3.9-G11
• Application: Generator Drive Engine
• Displacement: 3.9 L
• Configuration: 4-cylinder, in-line, 4-cycle
• Bore × Stroke: 102 × 120 mm
• Compression Ratio: 17.3:1
• Aspiration: Turbocharged & Aftercooled
• Fuel System: BYC PB Direct Injection with Electronic Governor

• Governor Regulation: ≤5%

Power Ratings:

• (50Hz): Standby: 80 kW/ 107 HP@1500 rpm; Prime: 70 kW/ 93 HP@1500 rpm

• (60Hz): Standby: 90 kW/ 120 HP@1800 rpm; Prime: 80 kW/ 107 HP@1800 rpm

Fuel Consumption :

• 1500 rpm: 100% Load (80/70 kW): 20.0 / 17.6 L/h

• 1800 rpm: 100% Load (90/80 kW): 22.5 / 20.1 L/h

Weight: ~350 kg (wet)

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Product Advantages

• Higher Output – Up to 90 kW at 1800 rpm, ideal for mid-sized gensets.
• Fuel Efficiency – Optimized consumption (5.3–22.5 L/h).
• Turbocharged & Aftercooled – Enhanced performance and thermal efficiency.
• Stable Operation – Electronic governor ensures frequency stability (≤5%).

• Reliable & Durable – Proven Cummins engineering and global service support.

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Key Features

• Turbocharged & aftercooled 3.9L engine for maximum efficiency.
• Dual-speed operation: 1500 rpm (50Hz) & 1800 rpm (60Hz).
• Compact and lightweight (350 kg wet).
• BYC PB direct injection system with electronic governor.

• Designed to meet GB/T18297 test standards.

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Applications

The Cummins 4BTA3.9-G11 Diesel Engine for Generator Sets is ideal for:

• Commercial Backup Generators – offices, telecom towers, retail.
• Light Industrial Power – workshops, farms, and rural electrification.
• Residential Power Generation – medium-sized home standby gensets.

• Rental & Portable Generators – mobile or temporary power supply.

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Product Availability

The Cummins 4BTA3.9-G11 Generator Drive Engine is available globally with genuine Cummins warranty, technical support, and spare parts, ensuring reliable long-term power generation.