Basic crawler control
HCB-CCB (Crawler Control Basic)

Simple track control for basic driving functions with different modes

Like the HCB-DCB basic drive control, the basic track control enables more flexible, more sensitive driving behavior than purely hydraulic solutions. supports the control of the diesel engine and the drive pumps and is already equipped with extensive functions. The basic crawler control system is designed purely as “tank steering”, where each track is controlled via its own joystick.

Depending on the operating mode, different characteristics such as starting behavior, acceleration, deceleration and limit values such as the final speed or the speed range of the diesel engine can be set. The range of functions is completed by a speed control, an adjustable creep speed, a speed-dependent steering angle limiter, a trim between the tracks and a load limit controller to protect the diesel engine against overload.

The standard hardware platform for the CCB is the HCB controller. If the CCB is to be integrated into a machine control system, it can easily be ported to another Völkel hardware platform.

The comfort functions in detail

Release and setpoint specifications

A prescribed procedure must be followed to set the machine in motion: First the diesel engine must be started, then the go-ahead is given and only then may a set value for the travel speed be generated. If this sequence is not followed, no control value is generated. Depending on the machine type, the setpoint can be set using a joystick or an accelerator pedal. If the machine is driven by pedal, a direction release via an FNR switch is required for forward and reverse travel.

Starting and braking behavior

The driving behavior of the machine can be set via characteristics and limit values for different operating modes. For example, the sensitivity of a setpoint generator (joystick, pedal) can be mapped linearly or reduced near the zero point and increased in the end range to enable a more sensitive start-up. Acceleration and braking ramps can be set static or dynamic. Separate speed limits can be set for each operating mode.

Speed control

When the speed control is activated, the control variables for the diesel engine and the pump are frozen in order to maintain the speed in the open control loop at the time of activation. The speed control is active until the button is pressed again or braked.

Creep speed

In creep speed, the final speed can be infinitely limited independently of the currently selected operating mode. The driver then has the entire pedal travel available for the limited speed range. This allows the machine to be driven even more sensitively.

load limit controller

The load limit controller protects the diesel engine from “stalling” by limiting the hydraulic Power depending on the diesel engine speed.

Control unit: HCB / Application: CCB (Crawler Control Basic)