EngineAndGearBox

Introduction

This page describes the physical modelling of a gear box and the elements around it.

The system

The system is composed of:

• the engine axle
• the gearbox
• the clutch
• the axle
• the the wheels
• the brakes
• the ground

The drawing below shows how elements are connected

drawing not found

The drive train

The wheel, the axle and the engine all have angular velocities.
The engine applies a torque on the axle through the gearbox (when the gearbox is not set on free wheeling).
The clutch applies a torque on the axle when engaged. The angular velocities of the engine and the axle are linked by the ratio of the gearbox. Formally:

T(engine)/R - T(clutch) = (R*I(axle) + I(engine)/R) * accel(engine)

and

accel(axle) = -R*accel(engine)

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