Project
AIM : To prepare a technical report on the ATV model explaining the model properties and results
ALL TERRAIN VEHICLE :
An all-terrain vehicle (ATV), also known as a light utility vehicle (LUV), a quad bike, or simply a quad is a vehicle that travels on low-pressure tires, with a seat that is straddled by the operator, along with handlebars for steering control. As the name implies, it is designed to handle a wider variety of terrain than most other vehicles
Simulink Model:
Case 1: ALL TERRAIN VEHICLE(ATV) WITH CVT and Dashboard
In this model, Brake input and throttle input are given by the user in the real time by the dashboard.This data is input to the Engine sensor and then to the CVT block. For, gear ratio, data is entered using a signal bulider.
CVT Ratio
The data is then processed and then input to the vehicle body.
On the dashboard, two different knobs have been used, they can be used to variate the brake input and throttle. The data can be varied ib real time with the help of these knobs, so as to simulate the model in real world.
ENGINE TORQUE -SPEED CURVE
CVT MODEL
In the below model, two shafts have been used. These are the two shafts of the CVT(one for primary and the other for secondary). This is then connected to the Variable gear ratio and two sensors are used to sense the rotational movement of the shafts.
vehicle body
Engine sensor
In this block, a generic engine data is entered. a sensor is used to record the RPM of the output shaft of the engine.
OUTPUT :
CVT Shaft speed
Out put plot
case2 : ATV WITH CVT
SIMULINK MODEL
BRAKE AND THROTTLE INPUT
OUTPUT :
CVT SHAFT SPEED
the cvt shows variations with respect to primary and secondary rmp based on their gear ratio
OUTPUT PLOT
case3 : AVT with CVT and dashboard using Lookup table
SIMULINK MODEL
In this model, instead of giving input manually to the CVT, a feedback is gievn into the CVT because the gear ratio is affected by the vehicle velocity in real time. For that purpose a lookup table is used in the model
CVT MODEL
VEHICLE BODY
LOOK UP TABLE VISUALIZATION
CVT RATIO
VEHICLE SPEED
CVT Shaft speed
case 4: AVT with CVT using lookup table
SIMULINK MODEL
runs for 200 seconds.brake and throttle uses step signal as input
CVT RATIO
VEHICLE SPEED
CVT SHAFT SPEED
CONCLUSION
We ran a system level simulation for a BAJA All -Terrain vehicle model using CVT with or without Dashboard and Lookup table based on the above-obtained results in the form of engine speed,vehicle speed, and CVT shaft speed helped to determine the vehicle's performance