COURSE PROJECT in the discipline: “Fundamentals of car design calculations” Clutch calculation

In the course of completing the course project, the following was completed:

• traction calculation;
• clutch calculation;
• cardan transmission calculation.

Contents

Abstract . 2

Contents. 3

Introduction. 4

1. DESIGN TRACTION CALCULATION AND CALCULATION OF FUEL ECONOMIC CHARACTERISTICS OF A VEHICLE.. 5

1.1 Selection of prototype and layout diagram of the vehicle. 5

1.2 Construction of the external speed characteristics of the engine of the designed vehicle. 5

1.3 Construction of a force balance graph. 8

1.4 Drawing a graph of dynamic characteristics. 13

1.5 Construction of an acceleration graph. 14

1.6 Plotting a graph of reciprocal acceleration values. 15

1.7 Constructing graphs of time and vehicle acceleration distance.. 16

1.8 Constructing a graph of power balance. 19

1.9 Construction of a graph of the fuel-economic characteristics of the designed vehicle.. 21

2. CLUTCH CALCULATION.. 24

2.1 Calculation of friction disc clutch. 24

2.2 Determination of the friction moment. 24

2.3 Determination of the compression force of friction discs. 25

2.4 Determination of the number of pairs of friction surfaces. 26

2.5 Determining the turn-off progress of the pressure plate. 27

2.6 Calculation of pressure springs. 27

2.7 Calculation of driving disks. 28

2.8 Calculation of driven disks. 29

2.9 Damper calculation. 30

2.10 Determination of clutch wear resistance indicators. 32

2.11 Clutch control drives. 34

2.12 Hydromechanical drive. 35

Conclusion. 36

List of sources used.. 37

The creation of new vehicle designs and the improvement of existing ones is impossible without the use of the science “Theory of Performance Properties”, which makes it possible to determine the traction-speed properties and fuel efficiency of the prototype being developed already at the design stage.

B In this work, analytical methods were used to determine the traction and speed properties and fuel -economic characteristics of the designed vehicle, taking into account the initial data. Based on the calculation results, graphs were constructed: VSV, traction balance, dynamic factor, acceleration, reciprocal acceleration values, acceleration time and distance, power balance and fuel efficiency. Next, we make changes to the design of automobile components and assemblies for a more convenient and rational use of vehicle resources and its fuel efficiency

As a result of the traction calculation and calculation of the fuel efficiency of the designed vehicle, graphical dependencies were obtained characterizing the traction-speed properties and fuel-economic dependencies that allow draw a conclusion about the degree of compliance of the latter with GOST and advanced world standards, as well as compare this calculation of components and assemblies of the clutch and driveshaft with the prototype and identify the advantages and disadvantages of one over the other.