Iveco Cursor Engines

IVECO-aifo is a manufacturer of engines used to drive cars, construction and agricultural machinery, compressor and electric units, Pumps, as well as railway locomotives and fishing boats. In the design of such power units, reliability is important, ease of maintenance and repair, adaptation to long-term operation with maximum torque revolutions, low fuel consumption and reduction of toxins in exhaust gases.
A family of engines called CURSOR 8 and CURSOR 10, whose production was launched in 1997 year. Modular layout of the structure adopted, which allows the construction of motors, meeting a very wide range of requirements. The basic unit was considered to be a module consisting of one cylinder with a diameter of approx.. 102 mm and piston stroke of 120 mm. The displacement of one module is 980 cm3. The design of the combustion chamber and the crank-piston system was developed jointly by specialists from lveco, New Holland and Cummins. The module head, depending on the purpose and requirements, may include a system with two or four valves. The type of fuel supply solution also depends on the purpose of the engine and the market, on which it will be operated. The manufacturer allows you to choose between a rotary lobe pump controlled by an electronic system, mechanical system, separate for each cylinder, unit injectors, or a common source solution controlled by a specialized computer. Each engine is also equipped with a turbocharger. In 6-cylinder units, the boost pressure is determined by changing the position of the turbine steering wheel blades on the delivery side, in others, an exhaust gas discharge valve is used in front of the turbine. The common source control system is enclosed in a special housing and mounted directly on the engine. The control module housing is mounted via rubber-oil sleeves, protecting the electronic device against vibrations, it is also cooled by fuel to power the engine, which limits the heating of the controller. The engine control system with the common rail system also remembers the "history" of its work. When there are irregularities, emergency operation mode is activated, limiting the maximum speed and torque rendered and the signaled need for service intervention. Connecting a specialized service computer allows you to read the operating parameters of the engine, at which there was a failure and quick diagnosis of damage.
The operation of motors with electronic control is facilitated by the speed control system (accelerator pedal) electrically connected to the controller, instead of mechanical cables changing the position of the throttle. Thanks to this, mounting the regulator is easy and does not complicate the construction of the machine, in which the engine is mounted.
Special executions are also possible – with a self-supporting hull adapted for installation in agricultural and construction tractors. During the development of NEF engines, various mounting options for attachments and drive torque reception devices were envisaged.. Engines operating at low temperatures are equipped with air heaters, installed in the intake manifold. Their task is preliminary, quick heating of the air sucked into the combustion chambers to facilitate start-up. All versions of the proposed power units meet the current and future, not yet in force, exhaust and particulate emission standards.
Noise reduction was also taken into account in the development of the NEF family. For this purpose, flexible vibration dampening seals were used in the hull connection – Sump. A similar function is performed by gaskets between the head and the engine block, but their design and material, from which they are made are different. Noise of gears used to drive injection pumps, oil or timing system significantly reduced, using meshing with a high degree of coverage (Hight Contact Ratio), significantly reducing the slack in the mesh and eliminating its impact work. The tolerance of crankshaft bearings has also been tightened, which further extended by 25% oil change interval.