PERFORMANCE ANALYSIS AND ENHANCEMENT OF PEUGEOT 307 TIMING BELT

ABSTRACT

In this study of Performance analysis and enhancement of Peugeot 307 timing belt, the effect of the engine speed, run time on the timing belt geometry were investigated and also a model were built to test how an engine should stop working when the timing belt cuts using sensor. The analysis, forces acting on the belt were carried out numerically. The belt failure monitoring model was achieved by the use of ultra-sonic sensor. Also an experiment was design to study the effect of time and engine speed on timing belt. The results obtained shows that the 307 timing belt have a life of 50,000 km and also that the engine speed has a positive correlation while the groove thick has a negative correlation with the engine speed.

CHAPTER ONE

1.0    INTRODUCTION

1.1    Background of the Study

The auto-industry is one of the important sectors of any economy. From past two decades optimum vehicle design is a prime concern in front of automobile industry. The timing drive system of an automobile is one of the most important system of an engine. The function of a timing drive is to transfer the rotation of crankshaft to camshaft and fuel Injection Pump (FIP) and other connected accessories so as to achieve proper timing at valves and the timing for fuel injection. Timing drive consisting of timing belts, timing belt/chains and timing gear drives (Aniket & Gujar,

2016).

When the engine is in motion, the dynamic forces like normal reaction forces, frictional forces, impact forces on the timing belt may cause considerable effect on the function of the camshaft and FIP shaft and hence on valve and fuel injection timing over the time.

The effect is prominent when the engine is at high speed. It was noted from the vehicle manual that, for Peugeot 307 engines, speeds ranging from 0-1500 RPM are considered as low speeds, those between 1500 – 2500 RPM are medium speeds and those above 2500 RPM are considered as high speeds. Dynamics of the timing belt drive system becoming worse as the engine speed increases and causes serious durability issues for engines, especially couple with bad road. The dynamic analysis of timing belt gives the idea of the behaviour of different components during motion and at specified conditions of working. Dynamic analysis includes computation of the forces coming on the belt, belt guides, sprockets, Plunger of tensioner.

1.2       Problem Statement

Failure of timing belt of a Peugeot 307 vehicle when in motion is a major cause of several damages like bending of valves piston crack etc. For a smaller car, replacement of timing belt would cost between (₦250000) – (₦350000), while for a larger SUV or minivan it would cost (₦350000). It is being conceived in this research work to analyse the effect of engine speed and run time of the timing belt geometry compare to the user design guide of the Peugeot 307 and to develop a model for simulating timing belt failure.

1.3       Aim and Objectives

The aim of this research work is to analyse the failure characteristics of Peugeot 307 timing belt.

The objectives are as follows:

i.    To experimentally determine the effect of engine speed and run time of the timing belt geometry compare to the user design guide of the Peugeot 307 timing.

ii.  To develop a model for simulating timing belt failure. iii. To simulate the timing belt.

1.4       Justification of the Research

The solution to Timing belt failure will be of main benefit to the vehicle owners because it will minimize maintenance cost when failure occurs. Accurate prediction of effect of run time against speed will avoid timing belt failure and developing a model to prevent engine operation during timing belt failure will also minimize maintenance cost.

1.5       Scope of the Study

This Experimental research will cover two experimental factors that is the run time and engine speed so as to determine the timing belt geometry which will be conducted on Peugeot 307 engine running at idle speed because of the logistics. The belt parameters considered for this research are the belt Pitch, width, groove thickness and total height using a digital Vanier calliper.

1.6       Limitations of the Study

This research work is limited to the failure characteristics of a Peugeot 307 timing belt.

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