Fault diagnosis model for a motor gearbox

The combustion engine delivers power within a narrow rev range. The tractive force is transmitted to the wheels under varying load situations through gear pairs. The more ratios there are, the better the engine work can be adapted to parameters such as acceleration, slope, load, consumption, and noise. To maintain engine operation within its optimal range of use, it is essential to be able to vary the transmission ratio between the engine itself and the drive wheels. In order to satisfy this need, it is necessary to insert a device generally defined as a mechanical gearbox between the motor and the wheels, which allows the motor to be used in an operating range capable of satisfying the needs of the users.

By using a fixed transmission ratio between the engine and the wheels, a curve is obtained that allows the maximum power of the engine to be exploited at a single-speed value. However, even if you have a stepped gearbox with a finite number...