Calculation of the design parameters and performance of the MAN TGM 18.240

  The technical characteristics of the selected prototype (MAN TGM 18.240) are summarized in Table 1.2:

Table 1.2. - Technical characteristics of the car  MAN TGM 18.240

Content

Introduction. 4

1. Calculation of design parameters and performance of the car. 5

1.1 Wheel arrangement of the car. 5

1.2 Diagram of the general layout and prototype of the car. 6

1.3 Mass characteristics of the vehicle. 8

1.3.1 Axis distribution of mass.  9

1.3.2 Coordinates of the centre of mass. 9

1.4 Choice of tyres 9

1.5 Determination of the main characteristics of the vehicle and engine. 10

1.5.1 Determination of engine power and construction of the external speed characteristic. 

1.5.2 Determination of the basic design parameters of the engine. 15

1.6. Determining the parameters of the transmission of the car. 16

1.6.1 Main gear ratio. 16

1.6.2 Determination of transmission gear ratios. 16

1.7. Power balance of the car. 19

1.7.1 Power balance chart and traction characteristics. 21

car. 21

1.7.2. Dynamic factor and dynamic passport of the car. 27

Conclusion. 29

Bibliography..  30

Coursework in the discipline "Design and calculation of cars" sets the following goals for the student:

-consolidate the acquired knowledge in the basics of design calculation and the theory of working processes of the car;

-gain skills in performing power calculation and determining the speed characteristics of the car

-be able to determine the design parameters and calculate the main functional elements of the car.

The main task of the coursework is the ability to make a design analysis of the car, namely:

- choose a prototype of the PBX;

 - work out the technical characteristics and layout of the car;

 - calculate the individual parameters of the engine and transmission;

 - calculate traction and speed characteristics;

 - determine the parameters of the operational properties of the car.

In accordance with the initial data, the calculation and selection of the design of the car begin with the definition of its wheel formula, layout scheme and prototype, geometric and mass characteristics.

The initial data for the calculation of the PBX design are given in Table 1.1:

Table 1.1. Initial data of option No. 20