508
The design of the machine is systematically improved—among others thanks to installed
monitoring systems and cooperation with users. An additional APC controller has been
introduced in the drivetrain system, which provides the following functions (Fig. 3):
• protects gearboxes against overloads,
• allows driving in automatic mode,
• controls the lockup function which has been implemented to increase the efficiency of
engine braking while driving on a slope.
Table 1. A list of monitored parameters for Haul Truck.
Variable name
Description
‘BREAKP’
breaking pressure
‘ENGCOOLT’
temperature of the cooling liquid of the internal combustion engine
‘ENGHOURS’
number of operating hours of the internal combustion engine cumulatively
‘ENGOILP’
oil pressure of the internal combustion engine
‘ENGRPM’
engine speed
‘ENGTPS’
deflection of the gas pedal
‘FUELUS’
instant fuel consumption
‘GROILP’
Transmission oil pressure
‘GROILT’
oil temperature of transmission and torque converter
‘HYDDRV’
attached additional hub drive
‘HYDOILP’
pressure in the hydraulic system
‘HYDOILT’
hydraulic oil temperature
‘INTAKEP’
engine boost pressure
‘INTAKET’
air temperature at the engine’s intake
‘SELGEAR’
direction and current gear
‘SPEED’
average speed every 1s
‘SWITCHMOVE’
switching the direction of travel under load
‘TRNBPS’
position of the brake pedal; 0–100%
‘TRNLUP’
lock up on/of
Figure 2. Powertrain components of Haul Truck CB4-20TB.