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Reduces power during gear shift.

Note: Advanced features in combination with sequential gearbox control is also available.

 

Switch activation can be triggered by one of these three methods: Digital inputInternal outputs or Virtual input.

 

 

Shiftcut

 

Enable shiftcut

Enable or disable shiftcut function.

 

Shiftcut mode

Specifies the shiftcut control method

Timed pulse (shiftcut input) - When the digital input function shiftcut input is triggered, shiftcut function is activated during the cut time period.

Timed pulse with table (shuftcut input) - When the digital input function shiftcut input is triggered, shiftcut function is activated with a table, and also extra options to control the ramp back time, see shiftcut ignition retard options below.

Timed pulse from sequential gearbox control - Uses the shiftcut time table, where shiftcut can be stopped if a analog gear position sensor is fitted, see analog gear sensor feedback below.

Input controlled (shiftcut input) - When the digital input function shiftcut input is triggered, shiftcut function is activated as long as the shiftcut input is active.

Input controlled (clutch switch input) - When the digital input function clutch switch input is triggered, shiftcut function is activated as long as the clutch switch input is active.

 

Cut time

Specifies the time (in seconds) engine power is reduced (shiftcut).

 

Cut output

Specifies engine cut method to reduce power

Cut ignition - Only cut ignition.

Cut fuel - Only cut fuel.

Cut fuel and ignition - Uses both fuel and ignition cut.

 

analog gear sensor feedback

Used to stop shiftcut if a fitted analog gear position sensor signals next gear is correctly inserted.

 

 

Shiftcut conditions

 

Enable cut above TPS

Enable shiftcut activation only above this TPS value.

 

Enable cut above RPM

Enable shiftcut activation only above this RPM.

 

max cut time

Specifies the maximum cut time (in seconds).

 

 

Shiftcut time (table)

 

Cut time

Specifies the time (in seconds) engine power is reduced (shiftcut).

 

 

Shiftcut ignition retard (and ramp back during time)

 

Retard angle

Extra options to retard timing during shiftcut.

 

hold time

A time table (in seconds) to hold the above retard angle ignition timing.

 

ramp back time

When the above hold time is reached, this table is used to ramp back the ignition advance to table values during the specified time.

 

Note: The retard and ramp back functions is used to smoothly increase power under a short period of time to let gearbox to "settle" and reduce torque.

 

 

Examples

 

Shiftcut mode: Timed pulse (shiftcut input).

clip0076

When Shiftcut input is triggered, in this example MaxxECU cuts ignition for 250ms if all conditions is valid for activation (over 5% TPS, over 1500RPM). Max cut time, fail safe max cut time.

 

 

Shiftcut mode: Timed pulse with table (Shiftcut input) / Timed pulse from sequential gearbox control.

clip0077

When Shiftcut input is triggered, in this example MaxxECU cuts injection using the shiftcut time table when shiftcut conditions are met.

Note: You can always change axis sources, for example to use an external potentiometer, button or switch to alter shiftcut times.

 

Shiftcut mode: Input controlled (Shiftcut input/Clutch switch input).

clip0078

When Shiftcut input / clutch switch input is triggered, in this example MaxxECU cuts fuel injection during the period the input is triggered, but for maximum 3 seconds when Shiftcut conditions are met.

 

See also, sequential gearbox control.