Clutch VAZ 2103

Contents

Contents

Introduction

Source Data

1 Analysis of the initial data and development of the layout diagram of the car

1.1 Determination of mass parameters

1.2 Determination of the number of axes

1.3 Clarification of vehicle axle layout and weight loads

2 Traction calculation and determination of traction-speed properties of a car

2.1 Dynamic wheel radius

2.2 Mechanical transmission efficiency

2.3 Air resistance coefficient

2.4 Determination of engine power and construction of its high-speed external characteristic

2.5 Determination of the number of gears and gear ratios of the vehicle transmission

2.6 Construction of dynamic characteristic and acceleration graph of the car

2.7 Plotting of vehicle acceleration time and path

2.8 Braking properties of the vehicle

2.9 Stability of the car

2.10 Vehicle handling

2.11 Fuel efficiency of the car

2.12 Smooth running of the car

3 Calculation of friction clutches

3.1 General Information

3.2 Determination of friction clutch parameters

3.3 Calculation of clutch operability indicators

3.4 Calculation of clutch parts

Conclusion

List of literature used

Introduction

Different types of road transport rolling stock - single cars, saddle and trailed road trains are combined by the concept of "motor vehicles "/PBX/. Common to them are wheel propellers and support axles in various combinations. In this regard, the interaction of the PBX with the road and the environment is based on the same basic laws as for a single car .

The efficiency of PBX use in various operating conditions is determined by a complex of their potential operational properties - traction, braking, cross-country ability, fuel economy, stability and controllability, comfort and smoothness. These performance properties are influenced by the main parameters of the car and its components, primarily the engine, transmission and wheels, as well as the characteristics of the road and driving conditions.

The more perfect the design and the better its technical condition, the higher the performance. Therefore, the vehicle, its systems and mechanisms are designed so that it has certain operational properties required for the given operating conditions and ensures its most efficient use.

Source Data

The variant number is 26;

Prototype car - Vaz2108;

Nominal carrying capacity, kg - 800;

Maximum speed, m/s - 33;

Rolling resistance coefficient - 0.03;

Maximum lifting angle, deg - 24.

Prototype Data

Type of car - passenger microlithrage;

Wheel formula - 4x2;

Total weight - 940 kg;

The weight of the equipped car is 940 kg ;

The maximum speed with full load in the horizontal section of the direct track is 85 km/h ;

Reference fuel consumption - 8.4/100 l/km;

Braking distance at 80km/h - 38m;

The mass of the towed trailer is 300 kg ;

The minimum turning radius is 5 m;

The maximum climbing angle to be overcome is 34%;

The depth of the ford being overcome is 0.45 m.

Calculation of clutch friction clutches

3.1 General Information

A clutch is a transmission mechanism that transmits the torque of the engine to the gearbox and allows you to briefly disconnect the engine from the transmission and reconnect them. It is a friction clutch that provides smooth touching of the car from the place, gear shifting and, in addition, protection of the transmission from dynamic overloads arising during movement.

The design of the clutch should provide a number of requirements: reliable transmission of torque from the engine to the transmission; full switching on and off; smoothness of actuation; minimum moment of inertia of the clutch driven part; balance of axial forces in the clutch on and off; normal thermal operation; consistency of friction moment; suppression of high-frequency oscillations caused by engine operation; easy and easy control.

3.2 Determination of friction clutch parameters

The parameters characterizing the structural dimensions of the clutch include two values - the outer and inner diameters of the friction linings D and d. Parameters characterizing friction properties of clutch include clutch margin factor, friction factor, pressure force of springs Pn; pressure on friction linings P0, number of driven PV discs, number and stiffness of pressure springs sp.

To determine the main parameters of the clutch, first of all, the value of the calculated clutch torque Ms is found, which for reliable operation should be greater than the maximum torque of the Me mach engine (the exception is semi-centrifugal clutches).

Conclusion

In the course work, issues were studied related to the operational properties that ensure the movement of the car and characterize its performance of transport and special work: transportation of passengers, cargo and equipment. These properties determined the adaptability of the car to operating conditions.

In each chapter of the course work, separate operational properties, its meters and indicators, the influence of structural and operational factors on this property are considered.