Motor bike- Clutch working GROUP-I RAJUKUMAR HARSHATH JOSHUA DANIEL BHASKER SANTHOSH.

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Presentation transcript:

Motor bike- Clutch working GROUP-I RAJUKUMAR HARSHATH JOSHUA DANIEL BHASKER SANTHOSH

Introduction A clutch is a mechanical device that engages and disengages the power transmission, especially from driving shaft to driven shaft. Without the clutch, the only way to stop the wheels from turning would be to turn off the engine -- an impractical solution in any kind of motorized vehicle. The clutch is a series of spring-loaded plates that, when pressed together, connect the transmission to the crankshaft. When a rider wants to shift gears, he uses the clutch to disconnect the transmission from the crankshaft. Once the new gear is selected, he uses the clutch to re-establish the connection.

Multi plate Clutch system of motorcycle:

CLUTCH : solid edge model

Physics:

Distinct modes of operation 1) slipping - the two plates have differing angular velocities 2) lockup - the two plates rotate together.

Equations : Equation 1:The state equations for the coupled system are: Equ 2 : The torque capacity of the clutch is a function of its size friction characteristics, and the normal force that is applied are

Equ 3 : When the clutch is slipping, the model uses the kinetic coefficient of friction and the full capacity is available, in the direction that opposes slip. Equ 4 : When the clutch is locked, the angular velocities of the engine and transmission input shafts are the same, and the system torque acts on the combined inertia as a single unit. So, we combine the differential equations (Equation 1) into a single equation for the locked state.

Equ 5 :Solving Equation 1 and Equation 4, the torque transmitted by the clutch while locked is: The clutch remains locked unless the magnitude of Tf exceeds the static friction capacity

Overall behavior of the clutch.

Modelling There are two methods for solving this type of problem: 1) Compute the clutch torque transmitted at all times, and employ this value directly in the model 2) Use two different dynamic models and switch between them at the appropriate times

Model and Running the Simulation

Clutch friction mode logic

Parameters used Ie = 1kg.m2 Iv= 5kg.m2 Be = 2Nm/rad/sec Bv =1Nm/rad/sec Mu k = 1 Mu s = 1.5 R= 1m

Plots :

Thank you