Truck tractor KAMAZ-54909-090-B5 (M1840) 4х4Н system of the hydraulic drive of the front wheels KAMAZ H-Drive.
The exposition of JSC “KAMAZ” at the bauma trade fair CTT RUSSIA 2018 was shown tractors with unusual wheel formula – 4х4Н. The last time the same KAMAZ premiere lit up at the exhibition Comtrans`2017. Today we find out some of the details of this interesting model received index KAMAZ-54909-090-B5 (M1840).
At first glance, is an ordinary KAMAZ – 5490 has already been known, even without the prefix NEO. However, if the KAMAZ-5490 is a leading only the rear axle and wheel formula 4×2, the subject of today’s analysis is the ability to connect to the movement and the front wheels.KAMAZ-54909-090-B5 (M1840) is focused primarily for the construction industry or should be used where it is expected to transport out of roads with improved surface, and the seasonal impassability of roads or in snowy conditions and slippery roads to work in the tipper road trains. This seemingly ordinary truck equipped with a unique hydrostatic drive system of the front wheels that makes the car all-wheel drive.Two-axle tractor unit to improve cross equipped with hydraulic drive front wheels KAMAZ H-Drive, was developed in PJSC “KAMAZ”.
Road off-road tasks traffic
In the construction industry employs a lot of road and transport technology away from public roads. But sometimes the way these machines overlap, for example, during unloading at the construction site tipper road train running on the longest shoulder. All operators of road trains construction purpose tipping semi-trailers or other add-ins faced with the necessity of having to truck the tractor at least a minimum off-road Arsenal, as in Congress, with asphalt work on the delivery of construction cargo does not end.Then all means are good: from “short” the main couples, and tires with “evil” tread pattern to many exotic locks and wheel formulas. However, the return transport on asphalt this Toolkit short-term use becomes a burden for high-speed traffic and is not conducive to fuel economy.
Hydrostatic wheel formula tractor
Here “KAMAZ” and offers his vision of solving this problem – KAMAZ-54909-090-B5 – tractor, built on the model 5490, but with connected front hydrostatic drive their own development. The principle of operation of KAMAZ H-Drive next. Pump-driven LUMP, activates a special clutch in the front wheel hubs, are exposed to the oil pressure begin to serve him torque. The system will signal electronic control unit, which receives information from the abs about the difference between the angular speeds of wheels of the rear axle, soE. the slip.
Pluggable front-wheel drive makes it easy to drive in the ice or leave dirt and is automatically deactivated at speeds over 25 km/h. Everything is simple. If necessary, you can move at all only through the front wheels, but only at the minimum speed. Another advantage of the hydraulic drive is downhill it can be used as an additional retarder or retarder, thereby reducing the load on the braking system.
In addition, the rear axle of the KAMAZ – Daimler HL6 mikolasko equipped with a lock. Thus, thanks to the 400-horsepower Cummins ISL engine, on the highway KAMAZ-54909-090-B5 dared a quick, relatively high-speed main couple, the relationship 3,909 and regional road tyres 315/80 R22,5. At the same time, he won’t pass and on the icy slope and the loose soil of the construction site, thanks to the KAMAZ H-Drive and “daymlerovskaya” differential lock axle.
In the workplace
Being in the cockpit KAMAZ-54909-090-B5, the driver does not get lost in the forest of levers wheel drive transmission. A front wheel connected and disconnected with a delicate panel, located on the front panel, and the differential lock is easily activated with a simple press of a button. As befits a modern tractor, it is equipped with air conditioning and auxiliary heater. That’s just the cab with low roof, one sleeper and a simple spring suspension.After all this testifies to the designers for use of their original solutions in the short arm, but with the ability to work the night shift and a long waiting loading/ unloading.
The drivetrain and suspension
Our unusual truck tractor KAMAZ-54909-090-B5, as already mentioned, the Cummins ISL 400 50 fifth environmental class power of 400 HP With it is aggregated mechanical 16 speed manual gearbox ZF 16S1820 TO. Rear axle Daimler HL6 with a hypoid main gear. Front suspension – few-leaf springs, rear – pneumatic, electronic control and load sensor on the rear axle. Front and rear wheel brake mechanisms – disk.
|Full weight, kg||18 600|
|The distribution of load on axles, kg||7020/ 11 580|
|Curb weight, kg||7685|
|Weight of towed trailer, kg||36 240|
|Full combination weight, kg||44 000|
|Maximum speed, km/h||90|
|Overcoming the bias, to train full weight of 44 000 kg, % (deg)||18 (10,2)|
||50 Cummins ISL 400 Turbo diesel, I-6, Euro 5
400 @ 2100 min-1
1682 at 1300 min-1
|Transmission||ZF 16S1820 TO, mechanical|
|Number of forward gears/ reverse||16/ 18|
|Grip||Single dry plate, diameter of the driven disc 430 mm|
|Brake mechanisms of all wheels||Disk|
|Gear ratio of a transmission||3,909|
|Suspension||Front – few-leaf springs, rear air|
|Fuel tank capacity, l||400|