Compact dozer operators feel safe with electronic control system
Every job site has distractions. Construction vehicle drivers
need to cope with other vehicle traffic, time crunches, terrain,
pedestrians, the weather and possible fatigue.
An electronic control system on a compact dozer insures that the
machine will not start up unless the operator performs a series
of steps. This routine is in place to protect the machine from
getting underway if the operator is out of place. A controller
processes information and sends out commands to a number of
components within the dozer. The solid-state microprocessor-based
controller pulls in inputs from the safety belt, seat switch,
safety arm and the ignition switch.
The controller contributes to the well being of the driver as
well, by blocking off the signal to the starter unless all safety
functions are in place. The machine functions are all pilot
operated hydraulics, with the pilot pressure bypassed by a valve.
The controller controls that valve.
Should the operator like to get more comfortable by unhooking the
seat belt, the system in turn becomes uneasy and reacts by
signaling the valve to disable the hydraulic system. The engine
will continue to run until the driver either buckles up or shuts
off the ignition. The driver will find that disengaging any of
the safety interlocks renders all machine movement inoperable.
Tracks and the blade, in particular, come to a halt.
Any application in which safety functions are critical to the
operation of heavy equipment.
How Does This Application Make Hydraulics Even Better?
This application was developed by Hydro
Electronic Devices, Inc. To visit the HED web site, click