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 output: 34.8 bhp /
liter
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 output: 39.7 bhp /
liter
Cursor
8-350:
- Maximum power: 352 hp (259
kW), from 1930 to 2400 rev / min
- Maximum torque: 130 kgm
(1280 Nm) from 1080 to 1930 rev / min
- Specific output: 45.1 bhp /
liter
Cursor 13 engine: 6 cylinders in line - diameter: 135 mm - Stroke: 150 mm -
capacity: 12882 cm3
Cursor
13-380:
- Maximum power: 380 hp (280
kW) from 1500 to 1900 r / min
- Maximum torque: 184 kgm
(1800 Nm) from 900 to 1500 r / min
- Specific output: 29.5 bhp /
liter
Cursor 13-440:
- Maximum power: 440 hp (324
kW) from 1450 to 1900 r / min
- Maximum torque: 214 kgm
(2100 Nm) from 1000 to 1450 r / min
- Specific output: 34.1 bhp /
liter
Cursor
13-480:
- Maximum power: 480 hp (353
kW) from 1530 to 1900 rev / min
- Maximum torque: 224 kgm
(2200 Nm) from 1070 to 1530 rev / min
- Specific output: 37.3 bhp /
liter
Cursor engines have three common characteristics that make them particularly
suitable for the mining and construction vehicles.
The
ability to hill start. The variable geometry turbocharger greatly enhances
low-end torque. The Cursor 8 engine reaches its maximum torque of 130 kgm
already at 1080 rev / min, with a value of more than 101 kgm since 900 r / min.
Since this scheme the clutch pedal is fully released, the gear ratio of the
kinematic chain (ratio 1/77 of obtained with a ratio of 1a to 1/16, 47 and a
rear axle ratio of 1/4, 67) allows a low 32 t on a gradient of 39% and 40 t on
a 30% gradient.
Of
course, the Cursor 13 boasts superior performance. Its kinematic chain is
constituted by a change Ecosplit ZF Overdrive (1a: 1/13 8 - 16a: 1/0, 84 -
Opening: 16,47) and a ratio of the bridge standard 1 / 4.23, with a overall
transmission ratio of 1/58 4. The ability to hill start at 900 rev / min are 43%
to 40 t to 56 t 30% for the 380 hp, 46% to 40 t to 56 t 33% for the 440 hp, 50%
to 40 t 35 t to 56% for the 480 hp.
The area
of maximum torque spans a range of 700 to 850 rev / min on the Cursor 8 and
450 to 600 rev / min on the Cursor 13 engine, which allows for maximum
flexibility.
The
maximum power is available since the mid range. On a bumpy ride, the ability to
leverage the engine with maximum torque and power over a field of 1400 r / min
(Cursor 8) and 900 rev / min (Cursor 13), makes it unnecessary gear changes on
difficult slopes .
Summary
of performance of vehicles with Cursor 8-350:
Tires: 13
R 22.5 - Gearbox ZF 16S151DD - axle ratio: 1/4, 67
Theoretical
maximum speed: 105.6 km / h - Speed to 1000 rev / min in 1st: 2,67 km / h
Maximum
allowable slope to the maximum torque at 1080 r / min
a 32 t: 50 %
a 40 t: 40 %
Maximum slope of departure (900 r / min):
a 32 t: 39 %
a 40 t: 30 %
Summary of performance of vehicles with Cursor 13 engine:
- Tires: 13 R 22.5 - Gearbox
ZF 16S ... OD - axle ratio: 1/4, 23
- Theoretical maximum speed:
109 km / h - Speed at 1000 revs / min in 1st: 3,52 km / h
- Maximum allowable slope to
the maximum torque at 1000 rpm / min
- Cursor 13-380 a 40 t: 43 %
- a 56 t: 30 %
- Cursor 13-440 a 40 t: 50 %
- a 56 t: 35 %
- Cursor 13-480 a 40 t: 52 %
- a 56 t: 37 %
- Maximum grade of departure
(900 r / min):
- Cursor 13-380 a 40 t: 43 %
- a 56 t: 30 %
- Cursor 13-440 a 40 t: 46 %
- a 56 t: 33 %
- Cursor 13-480 a 40 t: 50 %
- a 56 t: 35 %
or PTO
continues
Characterized
by the distribution positioned to the side of the flywheel, the Cursor 8:13
offer a substantial advantage for the missions of public works: the
availability of a power take-off at the rear of the engine, independent from
the gearbox, which drives a hydraulic pump the vehicle is stationary and in
gear for cement mixers, or just stop by for pumps of cranes. Manufactured by
Hydrocar, this PTO has a capacity of 600 Nm on the Cursor 8 and 800 Nm on the
Cursor 13, with a ratio of 1.14 / 1.
Slow Motion series engine
The "decompression brake" was an integral part of the Cursor
engines from the early stages of development. The principle is simple: the
partial reopening of the exhaust valves at the end of the compression phase,
allows to increase the "engine brake" making the most of the
resistant strain. With the addition of a variable geometry turbocharger, which
fills with air cylinders, the braking power of the ITB (Iveco Turbo Brake)
reaches (Cursor 8) 229 kW (310 hp) at 2800 rev / min in continuous mode. On
Cursor 13-440 and 480 hp: 300 kW (408 hp) at 2400 rev / min in continuous mode
(kW à xxx xx rev / min on the Cursor 13-380 hp). 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 discharge door, since it does not determine the superheat of the
upper parts of the engine, since almost all the hot air is disposed with the
exhaust gases. The effectiveness of the retarder depends on the speed of
rotation of the engine, instead of the vehicle speed as in the case of a
transmission brake. This feature is particularly useful in building site, since
it is sufficient to increase the scalar scheme and obtain a high retarding
power, even if the vehicle is traveling at low speed
