SimpleGearShift

Simple Gearshift

Diagram

Information

This information is part of the Modelica Standard Library maintained by the Modelica Association.

This model shows how an automatic gear shift is built up from a planetary gear, a brake and a clutch.

  • In the beginning, the clutch is free and the brake fixes the ring of the planetary. Thus we obtain a gearRatio = 1/(1 + planetary.ratio).
  • At time = 2 s, the brake frees the ring of the planetary, whereas the clutch blocks the ring and the sun. Thus we obtain a gearRatio = 1.

Outputs (3)

wEngine

Default Value: engine.w

Type: AngularVelocity (rad/s)

Description: Speed of engine

wLoad

Default Value: load.w

Type: AngularVelocity (rad/s)

Description: Speed of load

gearRatio

Default Value: wLoad / max(wEngine, 1E-6)

Type: Real

Description: Gear ratio load/engine

Components (10)

torqueStep

Type: TorqueStep

engine

Type: Inertia

idealPlanetary

Type: IdealPlanetary

load

Type: Inertia

quadraticSpeedDependentTorque

Type: QuadraticSpeedDependentTorque

clutch

Type: Clutch

brake

Type: Brake

feedback

Type: Feedback

const1

Type: Constant

ramp

Type: Ramp