MoTeC MDC - Manual (Page 4)

MoTeC MDC 2 Functionality
MDC Functionality
Mode selection
There are six user selectable control modes, four of which are user configurable. The control modes can be cycled
though using the dash mounted ACD button in the sequence below. The current mode is indicated on the
TARMAC, GRAVEL and SNOW dash board lights as follows:
0% Lock User Mode 1 User Mode 2 User Mode 3 User Mode 4 Constant Lock
TARMAC
○ ○ ○ ● ● ●
GRAVEL
○ ○ ● ○ ● ●
SNOW
○ ● ○ ○ ○ ●
Note: If the mode has not changed for one minute then the current mode is saved and will be used next time the
MDC is powered on.
Lock Calculation
Lock percentage applied to the centre diff is determined primarily by the vehicle speed, throttle position or engine
efficiency point (from a MoTeC ECU), and front to rear wheel slip.
Each of the four user modes are configured with an acceleration table, a braking table, a desired slip table and slip
control parameters. Slip control and ABS override may be disabled if not required.
The lock percentage for a user mode is determined according to the following strategy:
Brake
ON
OFF
Desired
Slip table
(kph)
Handbrake
ON
OFF
0%
Lock
% lock
Vehicle
Speed
Throttle
Position or
Manifold
Pressure
ABS
ON
OFF
5%
Lock
Front & Rear
Speed
Slip
control
params
Slip
Calculation
(% lock)
+ MIN
100%
Lock
Accel
table
(% lock)
Brake
table
(% lock)