Gear Shifter - MapleSim Help

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Gear Shifter

Automatic Gear Shifter Component

The Gear Shifter component automatically changes the gear for use with various gearboxes in the Driveline Component Library. The gear number (output) is incremented by 1 when the engine RPM (input) passes the upper threshold (${\mathrm{\omega }}_{\mathrm{high}}$). Similarly, when the engine RPM goes below the lower threshold (${\mathrm{\omega }}_{\mathrm{low}}$), the gear number is decremented by 1.

Note: To avoid multiple gear shifts due to small variations in the engine RPM, pass the input signal through a Lowpass Butterworth filter first.

Internal Structure

Connections

 Name Condition Description ID $\mathrm{RPM}$ - Real input for engine speed measured in RPM RPM - Integer output for the gear number. ${N}_{\mathrm{min}}\le N\le {N}_{\mathrm{max}}$ GearNo

Parameters

 Symbol Condition Default Units Description ID ${\mathrm{\omega }}_{\mathrm{low}}$ - $1500$ $\mathrm{RPM}$ Lower RPM threshold for down-shifting minw ${\mathrm{\omega }}_{\mathrm{high}}$ - $4000$ $\mathrm{RPM}$ Upper RPM threshold for up-shifting maxw ${N}_{0}$ - $1$ $-$ Initial Gear Number initialGear ${N}_{\mathrm{min}}$ $-$ $0$ $-$ Minimum Gear Number minGear ${N}_{\mathrm{max}}$ $-$ $4$ $-$ Maximum Gear Number maxGear



See Also



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