Driveline: engines and gearboxes

Cursor engines
The carts and tractors Stralis adopt the six- cylinder in-line Cursor 8 and 10. The Cursor 8 engine delivers three levels of power: 273 hp ( 200 kW), 310 hp (228 kW) and 350 hp ( 259 kW) . The Cursor 10 is available in two versions: 400 hp ( 294 kW ) and 430 hp ( 316 kW ) .

The technology of the two engines is the same and is tested on roads and construction sites since 1998 . The direct injection high pressure is ensured by single pump-injector driven by a camshaft inserted into the cylinder head . This shaft also drives the four valves of each cylinder and is driven by a cascade of gears located behind the engine. Turbocharging is provided by a variable-geometry turbocharger , optimized so that the engine develops the best performance at all engine speeds . The action of the brake is further enhanced by the turbocharger . All the engine functions are controlled electronically : flow injection , ignition timing advance , turbo geometry , decompression brake , speed controller. The control unit is connected to other electronic units that drive the gearbox , brakes and transmission braking . Exhaust emissions are compliant with Directive Euro 3 . Thanks to the excellent work done by the engine designers on the injection , combustion and electronic management , the reduction of the levels of pollutants reference - from 28% to 48 % compared to Euro 2 Directive - has been obtained without sacrificing engine performance , ie, without increasing the fuel consumption of vehicles.

The specific power of the Cursor 8-350 reaches the remarkable value of 45.1 bhp / liter at a speed that may seem high : 2400 r / min . However, the average piston speed does not exceed 10 m / s, which is perfectly reasonable . Used since 1998 on the tractor , and from 2000 on heavy vehicles , construction , intended for particularly difficult missions , the "small" Cursor 8 has shown , through its qualities of strength and durability, the conceptual validity of the new generation of engines Iveco .

On Stralis Active Time / Active Day , the surface of the radiator coolant and the heat exchanger air cooler ( intercooler ) were increased . The fan runs for shorter periods , thus absorbing a smaller amount of power . The charge air which reaches the engine is cooler , all to the advantage of the operating temperature of the engine and pollutant emissions . The drive of the fan is ensured by an electromagnetic coupling , controlled by a temperature sensor on the engine and through the on-board electronics . Contrary to the visco pairs , there are residual strength outside of the phases of operation.

Dimensions and Performance of the Cursor engines
Cursor 8 : 6 cylinders in line , diameter : 115 mm - Stroke: 125 mm - capacity : 7790 cm3

Cursor 8-270 :

Maximum power: 270 hp (200 kW ) from 1720 to 2400 rev / min
Maximum torque: 114 kgm ( 1115 Nm) from 1000 to 1720 rev / min
Specific power : 34.8 hp / liter
Approved for 5 Ecopoints

Cursor 8-310 :

Maximum power: 310 hp (228 kW) from 1950 to 2400 r / min
Maximum torque: 114 kgm ( 1115 Nm) from 1100 to 1950 rev / min
Specific power : 39.7 hp / liter
Approved for 5 Ecopoints

Cursor 8-350 :

Maximum power: 350 hp ( 259 kW) , from 1930 to 2400 rev / min
Maximum torque: 130 kgm (1280 Nm) from 1080 to 1930 rev / min
Specific power : 45.1 hp / liter
Approved for 5 Ecopoints

Cursor 10 : in-line cylinders , diameter : 125 mm - 140 mm stroke - Cubic Capacity: 10308 cm3

Cursor 10-400 :

Maximum power: 400 hp ( 294 kW ) from 1480 to 2100 rev / min
Maximum torque: 194 kgm (1900 Nm) from 1050 to 1480 rev / min
Specific power : 38.7 hp / liter
Approved for 5 Ecopoints

Cursor 10-430 :

Maximum power: 430 hp ( 316 kW ) from 1590 to 2100 rev / min
Maximum torque: 194 kgm (1900 Nm) from 1050 to 1590 rev / min
Specific power : 41.7 hp / liter
Approved for 5 Ecopoints

Also available certified engines for 4 Ecopoints
Cursor engines have three common characteristics that make them particularly suitable for economical driving :

The maximum torque is available from low revs ( from 1000 and 1100 rev / min) , which facilitates the full load starts and protects the clutch.

The area of maximum torque spans a range of 700 to 850 rev / min on the Cursor 8 and 400 to 500 rev / min on the Cursor 10 , ensuring a guide very elastic.

The maximum power is already at medium revs , which avoids the need to systematically push the engine at high engine speeds , at the expense of consumption. The Cursor 10-430 already delivers its maximum power at 1600 rev / min. The constant power zone extends over a field of 500 ÷ 600 rpm / min and must be used , for example, on the slopes difficult to avoid a further gear change

Iveco Turbo Brake : a continuous braking power of 380 hp
All Cursor engines are equipped as standard with a decompression brake " supercharged " : the partial reopening of the exhaust valves at the end of the compression phase will increase the " engine braking " , taking advantage of the resistant force . With the enhancement of the variable geometry turbocharger , which fills with air cylinders, the braking power of continuous ITB (Iveco Turbo Brake) was 229 kW (310 hp ) at 2800 rev / min on the Cursor 8 and 280 kW ( 380 hp ) at 2400 rev / min on the Cursor 10 . The performance of the ITB are comparable to those of transmission brake . The decompression brake , modulated by the action on the turbo geometry , allows you to adjust the speed downhill. The technique of decompression brake is superior to that of the brakes on the exhaust baffle , as it determines the heating of the upper parts of the engine. Another advantage : the heat resulting from absorption of energy by the ITB is largely dispersed with the exhaust gases , without overloading the cooling system of the engine, which thus remains available for a transmission brake .

The speed changes
Wagons with Cursor 8-270 and 8-310 are equipped with the gearbox ZF 9S Ecomid 109 9-speed synchronized. The other engines are mated to a ZF 16 speed synchronized Ecosplit : 151 for the 16S and 16S 8-350 Cursor Cursor 181 for 10-400 and 10-430 . To facilitate insertion of the 8 main reports , the command has ServoShift assistance . The interim reports are pre-selected using a button located under the knob of the gear lever and are entered by simply pressing the clutch pedal. The grid of the 8 reports the main is of the type with double "H" . This simple configuration can be immediately acquired by a driver who also uses for the first time an Iveco Stralis .

An automated gearbox
All Stralis Active Time and Active Day can take a gearbox automated EuroTronic II 12AS 2301 12-speed . This concept , developed by Iveco and ZF , is used since 1997 and since 2000 I sull'EuroTronic sull'EuroTronic II. The change of speed synchronizers is devoid of friction . Balancing the speed of the gears is obtained by adjusting the electronic engine speed . The function of the clutch , also with electronic control ensures optimal progressivity , even when starting uphill at full load. Consequently , the clutch pedal has been deleted. With the EuroTronic II , the driver can choose between a manual and an automatic mode . In manual mode , he decides gear changes via a pulse on the lever. In automatic software determines when the gear change according to the position of the accelerator pedal, the torque on the drive shaft , engine speed and engine torque .

The EuroTronic II in automatic mode turns all drivers in economical driving experts . Very easy to use, only a short time of learning and its operating logic - that exploits the characteristics of power and torque of the Cursor engines - proved to be ideal for all kinds of riding : highways of plain, national roads or rough areas congested urban . The EuroTronic II also contributes to safety, to the extent that it reduces driver fatigue and helps to maintain its reaction capacity intact until the end of her working hours . Experience has shown that the electronic control clutch start protects the components , to the benefit of their duration . Finally, an additional advantage for carriers looking to increase the payload : the EuroTronic II saves 65 kg compared to 16 S 181 gearbox with the same capacity , and 49 kg compared with the exchange 16 S 151 , to which should be still add the absence of mechanical linkages