Project

AIM: To perform the Simulink Model on the Baja ATV vehicle model by changing the parameter like a break, and throttle and observing the variations.

Description:

the components we are using in the above model are continuously variable transmission, vehicle body, generic engine, some fundamental components

The model of the continuously variable transmission

Simulink blocks used in the CVT

Variable ratio transmission: the variable transmission block represents a gearbox that dynamically transfers motion and torque between the two connected driveshaft axes, based and follower.

Inertia: the block represents an ideal mechanical rotational inertia used as the primary pully and secondary pully

Ideal rotational motion sensor: This block measures angular velocity or angle in a mechanical rotational network.

In CVT when the primary pully gets outwards then the secondary pully gets inward that time speed reduction happens. when primary pully gets in words then secondary pully gets outward that time speed overdrive happens.

firstly the condition Rs> Rp- Speed reduction

Secondly: condition Rp> Rs- overdrive

The secondary pulley is connected to the rare wheel

Vehicle body:

Block used in the vehicle body

Vehicle body: The vehicle body block represents a two-axle vehicle body in longitudinal motion.

Tire: The tire block models a tire with longitudinal behavior given by the magic formula an empirical equation based on four fitting coefficients.

Double shoe break: Represents a brake arranged as two pivoted rigid shoes symmetrically installed inside or outside a drum and operated by one actuator

generic engine:

It represents a system level

Model of spark ignition and diesel engines suitable for use at initial stages of modeling when only the basic parameters are available optional idle speed and red line controllers are included.

To connect the CVT and engine we get a simple gear ratio

Dashboard

It is used for indications of speed rpm breek input, throttle input.

In this model used speed torque curve.

Signal bilder: it is used for to set ratio of CVT gear

As per in aim we changed the parameters like break and throttle and we get following

the simulation is run for 100sec

Max speed

Throttle	break	max speed (t=100km/h)
0.3	0	35
1	0	63
0.5	0	44
0.3	0.3	6.2
0	0.3	0

Shaft speed:

Throttle	break	prime shaft speed	secondary shaft speed
0.3	0	2024	4045
1	0	3643	7290
0.5	0	2515	5500
0.3	0.3	352.2	705
0	0.3	0	0

Model with throttle =0.3, break=0

Speed curve

Shaft speed curve

Model with throttle= 1, break=0

Speed curve

Shaft curve

Model with throttle =0.5, break=0

Speed curve

Shaft speed

Model with throttle =0, break=0.5

speed curve

shaft curve

Model with throttle =0.3, break=0.3

Speed curve

Shaft speed