QSB4.5 Electronic Diesel Engine for Construction, Agriculture & Generator Sets
The QSB4.5 is a fully electronic, high-pressure common rail diesel engine developed from the proven B Series platform.
Compact, lightweight, and powerful, it is widely used in construction machinery, agricultural equipment, generator sets, and marine applications.
Technical Specifications
QSB4.5 Engine Models
| Model | Rated Power (kW@rpm) | Max Torque (N·m@rpm) |
|---|---|---|
| QSB4.5-C110-30 | 82 @ 2200 | 488 @ 1500 |
| QSB4.5-C110-31 | 82 @ 1800 | 488 @ 1300 |
| QSB4.5-C130-30 | 97 @ 2200 | 600 @ 1500 |
| QSB4.5-C160-30 | 119 @ 2200 | 624 @ 1500 |
The QSB4.5 diesel engine is the modern electronic replacement for the classic mechanical 4BT and 6BT engines, combining Cummins’ legendary B Series durability with advanced high-pressure common rail (HPCR) fuel injection technology.
With a displacement of 4.5 liters, an inline 4-cylinder configuration, and full electronic control, the QSB4.5 delivers excellent power density, low fuel consumption, reduced noise, and reliable performance under demanding operating conditions.
Designed to meet strict global emission standards, the QSB4.5 has become a mainstream power solution for construction machinery and agricultural equipment upgrades.
Key Technical Features
-
High Pressure Common Rail Fuel System
Higher injection pressure ensures better fuel atomization, improved combustion efficiency, and lower fuel consumption. -
Full Electronic Control Module (ECM)
Precisely controls injection timing and fuel quantity, with built-in diagnostics and engine protection functions. -
Compact & Lightweight Design
Ideal for equipment with limited installation space. -
Robust B Series Heritage
Cast iron cylinder block and cylinder head ensure high durability and long service life. -
Complete Accessory Package
Supplied with full accessories for easy installation and integration.
Key Advantages
-
Wide Power Output Range
Rated power typically ranges from 110 to 173 kW (approx. 150–235 HP). -
Strong Torque Performance
Maximum torque ranges from 580 to 820 N·m, ensuring excellent low-speed performance. -
Low Emissions & Low Noise
Designed to meet EPA Tier 3 / Tier 4i and EU Stage IIIA / IIIB standards. -
Easy Maintenance
Modular design with centralized service points simplifies maintenance. -
Excellent Application Flexibility
Suitable for both mobile and stationary equipment.
Core Applications
-
Construction Machinery
Small to medium excavators (e.g. Kobelco, Hyundai, Doosan), loaders, skid steer loaders, air compressors, forklifts -
Agricultural Machinery
Combine harvesters, large tractors -
Power Generation
Prime or standby diesel generator sets -
Marine Applications
Small workboats and yachts -
Special Vehicles
Airport ground support equipment
Emission Compliance
Designed to comply with US EPA Tier 3 / Tier 4i and EU Stage IIIA / IIIB emission standards, making it an ideal choice for emission upgrade projects.
Technical Specifications
QSB4.5 Engine Models
| Model | Rated Power (kW@rpm) | Max Torque (N·m@rpm) |
|---|---|---|
| QSB4.5-C110-30 | 82 @ 2200 | 488 @ 1500 |
| QSB4.5-C110-31 | 82 @ 1800 | 488 @ 1300 |
| QSB4.5-C130-30 | 97 @ 2200 | 600 @ 1500 |
| QSB4.5-C160-30 | 119 @ 2200 | 624 @ 1500 |
General Specifications
-
Engine Series: Cummins B Series (Electronic Version)
-
Engine Type: Inline 4-cylinder, 4-stroke
-
Displacement: 4.5 L (4,490 cc)
-
Bore × Stroke: 102 mm × 120 mm
-
Aspiration: Turbocharged & Aftercooled
-
Fuel System: High Pressure Common Rail (HPCR)
-
Control System: Full Electronic Control (ECM)
-
Cooling System: Water-cooled
-
Application: Construction, Agriculture, Generator, Marine
Different power ratings, emission configurations, and OEM solutions are available.
Contact us now for price, lead time, and technical support.
| Model |
QSB4.5-C110-30 ,QSB4.5-C110-31 ,QSB4.5-C130-30 ,QSB4.5-C160-30 |
|---|---|
| Rated Power (kW@rpm) |
119@2200 ,82@1800 ,82@2200 ,97@2200 |
| Max Torque (N·m@rpm) |
488@1300 ,488@1500 ,600@1500 ,624@1500 |
| Series |
ISD Series |
Quality Assurance & Compliance
Warehouse Storage
Faq
A: Our company's core businesses cover the entire process of diesel engine development, assembly, modification, maintenance, and testing; the production and R&D of explosion-proof engines; the supply of Cummins spare parts, as well as overhaul and testing services, etc
A: Neutral package with strong cartons normally , or according to your requirements.
A: T/T, L/C, MoneyGram, PayPal, Cash etc
A: EXW, FOB, CFR, CIF，DDU，DDP.
A:The specific delivery time depends on the items and the quantity of your order. We will confirm it with your detailed order.
A:Yes, the warranty period is 6 months. Coverage includes core engine components. Wear-and-tear parts and failures caused by improper operation are excluded.
A: We offer professional engine customization services and can fully tailor the products to your specific requirements, with a variety of options available for pricing, specifications and configurations. The minimum order quantity (MOQ) for customized engines is 1 unit.
A:Yes, all engines undergo rigorous appearance inspections and comprehensive performance tests prior to delivery to ensure compliance with quality standards. We will also provide customers with detailed factory test videos and real-time shipping photos for full traceability.
A:Should you have any quality inquiries after receiving the goods, please contact our professional after-sales team in a timely manner and provide relevant photos and videos for verification. We will first provide efficient remote technical support to resolve your issues promptly.
For confirmed quality problems within the warranty period, we offer free repair, replacement of faulty parts or even full machine replacement services, with all associated logistics costs borne by our company.
For issues not attributable to our side, we still provide free technical guidance and supply matching spare parts; the cost of spare parts and related logistics shall be borne by the customer.
