Course dynamic calculation of AZLK-412 engine

Contents

Contents

Introduction

Task

1. Thermal calculation of the engine

1.1 Fuel

1.2 Working medium parameters

1.3 Environmental parameters and residual gases

1.4 Intake Process

1.5 Compression Process

1.6 Combustion process

1.7 Expansion and Release Processes

1.8 Indicator parameters of the operating cycle

1.9 Effective engine performance

1.10 Main cylinder and engine parameters

1.11 Building an Indicator Chart

2. Internal combustion engine heat balance

3. Calculation of motor kinematics

4. Calculation of engine dynamics

4.1 Gas pressure forces

4.2 Bringing of masses of parts of crank mechanism

4.3Specific and full inertia forces

4.4 Specific total forces

4.5 Torques

4.6 Crankshaft crankshaft forces

5 Balancing

6. Calculation of piston group

6.1 Piston calculation

6.2 Calculation of piston ring

6.3 Calculation of piston pin

Conclusion

List of literature:

Paper

Explanatory note: page 56, figure 7, table 10, sources 4

The object of the study is the operating processes and characteristics of the internal combustion engine.

The purpose of the work is to perform thermal calculation and thermal balance of the internal combustion engine, increase the power and economic parameters of existing engines.

In the course work, the following are calculated: fuel, environmental parameters, processes of the internal combustion engine, indicator parameters of the working cycle, effective engine parameters, main engine parameters, thermal balance, an indicator diagram is built, a comparison of the calculated engine and the prototype is made, the path, speed and acceleration of the piston, curves of specific forces and torque are built. Forces acting on the connecting rod neck were also calculated and built, and a diagram of the wear of the connecting rod neck was compiled. Piston, piston ring and piston pin are designed.

INTERNAL COMBUSTION ENGINE, POWER, FUEL, COMPRESSION RATIO, PROCESS, RESIDUAL GASES, PISTON, PIN, BENDING STRESS, SPECIFIC FORCE

Introduction

The engine is one of the most important parts of the car. The dynamic and operational qualities of the car depend on its characteristics. In the modern world, there are about a dozen different engines, distinguishable by the type of fuel used, kinematic scheme, type of mixing, ignition method, etc. For more than 200 years, the internal combustion engine has not changed the principle of its operation. It is based on the sequential conversion of the chemical energy of the fuel into thermal energy during its combustion (oxidation), and then into mechanical work during the expansion of the working member (most often the engine piston). Moreover, the faster the combustion occurs, the longer the "useful" working stroke of the piston and the more fully released heat is converted into mechanical work, which means that the engine efficiency and power are higher.

At the same time, there are a large number of limitations on the possible rate of combustion, mainly related to protection against overload of engine parts in mechanical and thermal terms. At the same time, it is important to clearly represent the mechanism of processes occurring in the engine, to be able to analyze factors affecting the engine operation.

Task

Perform thermal calculation and heat balance of internal combustion engine, perform calculation of kinematics and dynamics of engine, perform calculation of piston, piston ring and piston pin.

Prototype - AZLK412 engine.

Conclusion

In the course design, the following were performed: thermal calculation of the engine working cycle, dynamic calculation of the crank gear mechanism, calculation of parts for strength.

Calculated: fuel, environmental parameters, processes of the internal combustion engine, indicator parameters of the working cycle, effective engine parameters, main engine parameters, heat balance, built indicator diagram, path, speed and acceleration of the piston, curves of specific forces and torque are built. Forces acting on the connecting rod neck were also calculated and built, and a diagram of the wear of the connecting rod neck was compiled. Piston, piston ring and piston pin are designed.