Cummins QSL 6.7 engine
The Tier 3/Stage IIIA QSB6.7 engine is one of the Quantum Series of rail engines from Cummins with innovative technology that delivers more for less.
The QSB6.7 has more power, more torque and higher durability – all while achieving lower fuel consumption, lower emissions and less servicing. Using the Cummins PowerMatch tool set, it is possible to custom-tailor the engine torque curves and calibration features tothe specific operation of the equipment. This means higher productivity and fuel efficiency benefits for the rail operator.
The QSB6.7 has been designed with features which include:
• Tier 3/Stage IIIA emissions capability
• increased durability and reliability
• lower total life costs of ownership
• high power and torque
The QSB6.7 is designed to provide the operator superior value and reliability, while meeting stringent worldwide emissions standards.
Cummins engines have many advantages such as strong power, high reliability, and good fuel economy, the following is a detailed introduction:
Strong power performance: with advanced combustion technology and turbocharging technology, the fuel injection pressure is high and the combustion is more sufficient. Its engine torque point speed range is wide, such as some models can produce maximum torque at 1000-1400 rpm, with obvious characteristics of large torque at low speed, fast starting, acceleration, and strong climbing. The transient response of some engines has been significantly improved, and it can quickly respond to the throttle and have strong power output to meet the power needs under various working conditions.
High reliability: Key components such as the cylinder block and cylinder head of Cummins engines are made of high-strength materials and reinforced design, such as integral cylinder heads, which are rigid and not easy to deform. Its number of parts is smaller than that of similar products, reducing failure points and reducing failure rates. At the same time, after a large number of road test tests, such as road tests of more than 3 million kilometers at high temperature, high cold, and high altitude for different application conditions, B10 has a long life, and some models can reach 2 million kilometers, ensuring the reliability of the product.
Good fuel economy: Using Smart Brain 2.0 closed-loop control technology, XPI ultra-high pressure fuel injection system, etc., the fuel injection pressure is high, which can make the fuel atomization more uniform and the combustion more complete. In addition, it is also equipped with an intelligent fuel consumption management system, EBP intelligent energy-saving system, etc., which can guide the driver to choose the best gear according to different road conditions and loads, so that the engine can maintain the best state with the lowest fuel consumption and reduce the cost of use.
Advanced emission control: The use of advanced emission control technology can meet strict emission standards, such as National V and National VI emission standards, effectively reducing the impact on the environment.
Easy maintenance: The structure design is compact, and the integral cylinder design reduces the number of parts and makes maintenance more convenient. At the same time, its parts are versatile and interchangeable, and it has a wide service network around the world, which is convenient for users to repair and maintain.
Superior braking performance: standard Jacobs engine braking, the braking effect is obvious, the braking power can reach 327 horsepower, the switch is simple to operate in the cab, the brake gear is selectable, and the driving brake works at the same time, which can make the vehicle obtain greater braking power, and no fuel consumption, lifetime maintenance-free, which can effectively save costs.
Strong adaptability: The oil pan has high ground clearance, strong waterproof and anti-vibration ability, and can be customized for different working conditions such as dumping, mixing, and port pulling. In addition, its fuel adaptability is strong, and the unique Celect electronically controlled fuel system can adapt to different fuel qualities without emptying the fuel system.
Type Inline/ 4-cylinder/ water-cooled/4-stroke/ electronically controlled high-pressure direct injection
Cylinder diameter x stroke 107 × 124 mm
The working volume is 6.7 liters.
Aspiration With supercharger and intercooling
Maximum power 260/194 (hp / kW)
Maximum torque 990(Nm)
Electronic control system ECU
Fuel system high pressure fuel distribution ramp system
Stage IIIA emissions for China and the EU
Dry weight 520 kg
L × W × H 1150 × 810 × 910 (mm)