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 (ωhigh). Similarly, when the engine RPM goes below the lower threshold (ωlow), 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

RPM

-

Real input for engine speed measured in RPM

RPM

Gear Number N

-

Integer output for the gear number. NminNNmax

GearNo

 

 

 

 

Parameters

Symbol

Condition

Default

Units

Description

ID

ωlow

-

1500

RPM

Lower RPM threshold for down-shifting

minw

ωhigh

-

4000

RPM

Upper RPM threshold for up-shifting

maxw

N0

-

1

Initial Gear Number

initialGear

Nmin

0

Minimum Gear Number

minGear

Nmax

4

Maximum Gear Number

maxGear

See Also

MapleSim Driveline Library Overview

MapleSim Library Overview

1-D Mechanical Overview

Engines and Dynamometers

 

 

 


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