Design Of Overheat Resilient Engines: Issues And Prospects

ABSTRACT

Today’s automobile engines ( such as heavy duty engines) demand more from coolant than ever before and the reason is the higher exhaust gas recirculation gas rate produce more heat, increasing pressure on the coolant performance capabilities. The Cooling system plays an important role to control the temperature of the engine. The overheating of the engine usually occur due to an inefficient cooling system and the failure of cooling system component results in overheating of an engine. This paper presents the analysis conducted to find out the causes of heavy duty engine overheating. The factors which were frequently affecting the engine temperature are found to be the coolant, radiator, fan and the water pump. The mentioned factors are found by using the pareto analysis technique, a survey is also conducted on various heavy duty trucks for the possible causes. The cause and effect diagram is presented to have a clear idea of the causes and its sub causes and the thermal analysis of the radiator is done using Ansys software.

TABLE OF CONTENTS

COVER PAGE

TITLE PAGE

APPROVAL PAGE

DEDICATION

ACKNOWELDGEMENT

ABSTRACT

CHAPTER ONE

• INTRODUCTION
• BACKGROUND OF THE STUDY
• PROBLEM STATEMENT
• OBJECTIVE OF THE STUDY
• PURPOSE OF THE STUDY
• SCOPE OF THE STUDY
• SIGNIFICANCE OF THE STUDY
• LIMITATION OF STUDY
• DEFINITION OF TERMS

CHAPTER TWO

LITERATURE REVIEW

• INTRODUCTION
• ISSUES OF ENGINE OVERHEATING
• PROSPECT OF ENGINE OVERHEATING
• SIGNALS TO LOOK FOR WHEN A CAR OVERHEATS
• OVERVIEW OF ENGINE RADIATORS

CHAPTER THREE

3.0      METHODOLOGY

• INTRODUCTION
• COMPONENTS OF THE COOLING SYSTEM
• DATA COLLECTION
• ANALYSIS OF PROBLEM
• ANALYSIS
• ANALYSIS OF THE RADIATOR

CHAPTER FOUR

• RESULT

CHAPTER FIVE

• CONCLUSION
• REFERENCES

CHAPTER ONE

1.0                                                        INTRODUCTION

1.1                                           BACKGROUND OF THE STUDY

Car engines are prone to overheating. Most engines are designed to operate within a “normal” temperature range of about 195 to 220 degrees F. A relatively constant operating temperature is essential for proper emissions control, good fuel economy and performance. But problems can arise that cause the engine to run hotter than normal, resulting in engine overheating.

Anytime temperatures climb beyond the normal range, for any reason, your engine is in danger of overheating.

The heavy duty engine in the heavy vehicles usually produce more heat than the commercial vehicles engines it because of their high capacity to carry loads and to maintain a constant speed. The energy produce by these heavy duty engines are enormous, which is a match to its capacity but the problem with these engines are these energy that are produced are not efficiently utilised only 40 % of the energy is utilised by the engine and the remaining 60% is wasted in the form of heat. This waste heat in the engine should be eliminated from the engine in order to avoid the engine from attaining the permissible heat limit.

Every engine has a capacity to cover a certain distance especially the heavy duty truck engines are designed to cover distance in terms of thousands of kilometres, during this journey they need to run in an optimum condition without any failure. In order to attain this condition the excess heat from the engine has to be eliminated so that the permissible limit of the engine is not attained during the journey of the vehicle.

The elimination of the excess heat from the engine is done by the coolant through the cooling systems, the prime objective of the cooling system is to reduce the excess heat generated from the engine. It does its job by leveraging the coolant, the cooling system is complex that circulates the coolant all around the engine through the passage that are produced with in the engine, the coolant which is sent inside the engine will absorb the heat that is generated from the engine, the heat generated by the engine is very high about 2200°C-2500°C and if it continues to be then it may result into seizing.

The cooling of the engine should not go beyond certain limit as it may affect the thermal efficiency of the engine so, the main objective of the cooling system is to keep the engine in a most optimum condition without affecting the efficiency of the engine.

The cooling systems are designed in such a way that when the engine is in a cold state condition they do not cool the engine further more as it will lead to inefficiency so, it will allow the engine to get warm up to the maximum operating temperature, then it starts cooling engine. If the cooling system do not do its job properly then the efficiency of the engine is affected, as it was said earlier especially in the case of the heavy duty engines this is the problem so, we have did some sort of analysis and found the root cause of problems in the cooling systems with the help of pareto analysis

1.2                                                  PROBLEM STATEMENT

When engine heats it may start to detonate. Overheating makes engine to rattle and ping and lose power. If detonation continues, it may damage the rings, pistons and/or rod bearings. This study provides a way out of this problem thereby highlighting possible causes and remedy to engine overheating.

1.3                                              OBJECTIVE OF THE STUDY

The objectives of the study are listed below:

1. To understand the problems that cause overheating in automobile engines
2. To set up a strategy in solving those problem.

• To set up a standard for preventing overheating in automobile engines.

1.4                                                PURPOSE OF THE STUDY

The purpose of this study was to investigate the prospect and problems of overheat engine in automobile. The study also sought to compare the issues and prospect of overheating engines.

1.5                                                  SCOPE OF THE STUDY

The limits of this study is the issues and prospect of overheat resilient engines. A means of ensuring standard means of protecting automobile engines from overheating. The study involves the development of strategy in solving the problem.

1.6                                           SIGNIFICANCE OF THE STUDY

1. This study is significant in the sense that it looked to the meaning of overheating in engines.
2. It also help us to understand the problems that causes overheating in engines.

• To know the methods or ways of solving them.

1. Furthermore, the results of this finding may help to identify some of the problems contributing to the overheating in engines. Also the results of this study may suggest solutions to overheating in vehicles.

1.7                                                 LIMITATION OF STUDY

This research work in carried out in automobile engines and as a result it is limited from other engines.

1.8                                                 DEFINITION OF TERMS

Automobiles: is a wheeled motor vehicle used for transportation. Most definitions of cars say that they run primarily on roads

Engine Overheating: Overheating is a phenomenon of rising of temperature in engine

Engines: is a machine designed to convert one form of energy into mechanical energy