The new STRALIS has adopted Cursor FPT Industrial engines with in-line 6 cylinder architecture, in three variants (8, 10 and 13 litres for the Euro V range; 9, 11 and 13 litres for the Euro VI range) and eight power variants for the Diesel versions (from 310 to 560 hp) and three CNG versions (from 270 to 330 hp). They are engines offering low fuel consumption and excellent performance, with maximum torque available at very low speeds (starting from 1,000 rev /min). Thanks to the reduced number of gear changes, this flexibility results in high efficiency and driving comfort.
The exceptional vehicle operating range is guaranteed by fuel tanks with capacities of up to 1,400 litres. All the powertrains are equipped with a decompression engine brake, which provides additional security and helps to reduce the wear and maintenance costs of the braking system.
Furthermore, on all the Euro VI engines, there is an exhaust throttle valve that improves the performance of the new engine by up to 30% compared to current Euro V engines, called Super Engine Brake (SEB). The engine brake is integrated with the service braking system and with the auxiliary retarder INTARDER.
Fundamental for the optimisation of combustion efficiency are the effective high average cylinder pressure and the high injector pressure. In order to achieve these results, significant changes have been made to the architecture of the crankcase and cylinder head, which have led to greater structural rigidity, increased coolant circulation and greater nominal capacity.
The Euro VI engine range features a latest generation common rail injection system, with maximum injection pressure of up to 2,200 bar. A new electronic control unit has been introduced for the management of engine parameters and the accurate control of the after-treatment system of exhaust gases. The new control unit has been designed to optimise the compactness and to integrate the functionality of the engine, the SCR system and DPF.
The Cursor Euro VI series engines, equipped with the highest torque in a variable geometry turbocharger, are characterised by the introduction of an electronic control unit, which helps to optimise the response times of the load at low engine speeds and to increase the efficiency of the engine brake.
In order to ensure reduced environmental impact, the Euro V series engines have been provided with a closed circuit suction system - a characteristic maintained even for the Euro VI series. Furthermore, to prevent the dispersion of oil vapours into the blow-by gases of the engine, high-performance oil separation systems have been introduced, in order to minimise the risk of contaminating the DPF.
Thanks to the combustion optimisation program, particulate emissions from the engine are already reduced and the forced regeneration of the DPF is therefore not necessary, which is important in terms of fuel consumption and periodic maintenance.
Furthermore, since only clean filtered air enters the engine instead of recirculated exhaust gases, wear is maintained at very low levels and oil change intervals are longer, with corresponding maintenance intervals of up to 150,000 km.
These aspects are also particularly advantageous in terms of operating costs and vehicle downtime due to scheduled maintenance. The advantages can be summarised in the following points:
• increased reliability;
• higher power without necessarily having a sophisticated system of air management;
• low operating costs due to lower engine wear and long service intervals (up to 150,000 km);
• simple and compact design, both of the engine and of the High Efficiency after-treatment system, with reduced weight and obstructions.
