The control system of an internal combustion forklift is the central nervous system that
manages the power from the engine and translates the operator's commands into precise,
powerful, and safe movements. Its primary function is to ensure optimal performance,
efficiency, and safety of the material handling equipment.
1. Traditional, Mechanical/Hydraulic Control System
It uses a direct mechanical linkage (levers, cables, rods) connected to hydraulic control valves.
The operator's physical force on the control lever directly moves a spool inside a hydraulic valve.
2. Electro-Hydraulic Control System
It replaces mechanical linkages with electronic sensors and controllers.
Operator commands from levers or joysticks are sent as electronic signals to a central
Electronic Control Unit (ECU), The ECU then sends commands to electro-hydraulic proportional
valves. These valves precisely meter the flow of hydraulic oil based on the electrical signal received.
Mainly Including the Following Components:
1. Control Levers and Joystick: The primary input device for hydraulic functions.
2. Sensors: Monitor parameters like engine RPM, coolant temperature, hydraulic pressure, and fork position.
3. Pedals: Accelerator, brake, and inching pedal (for disengaging the transmission while applying hydraulics).
4. Electronic Control Unit (ECU): The "brain" that processes inputs and controls outputs.
5. Proportional Solenoid Valves: Electrically operated valves that provide precise control over hydraulic flow
and direction.
