DIESEL ENGINEA Seminar ReportSubmitted In partial fulfilment For the award of the Degree of Bachelor of Technology In Mechanical Engineering

Submitted to : Submitted By:Mr. Anil Mahawat Rahul Choudhary(HOD M.E. Deptt.) Roll No. 10EAEME041

Department of Mechanical EngineeringAlwar Institute of Engineering & Technology Alwar- (Rajasthan)April-2014

CANDIDATE DECLARATION

I, am RAHUL CHOUDHARY student of Mechanical Engineering of Alwar Institute of Engineering & Technology, Alwar hereby declare that the all information written in this seminar report file are true.The seminar entitled assigned to me by DIESEL ENGINE during my seminar for the partial fulfilment from Rajasthan Technical University, Kota is the original work done by me and the information provided in the study is authentic to the best of my knowledge.

(RAHUL CHOUDHARY)

ACKNOWLEDGEMENT

We owe a great many thanks to a great many people who helped and supported us during the making of the project. Our deepest thanks to Mr. Anil Mahawat (HOD ME Deptt.), for the guide of the project for guiding and correcting various documents of us with attention and care. We would thank our institution and my faculty members without whom this project would have been a distant reality. we also extend our heart full thanks to my friends and well wishers. I wish to express my deep sense of gratitude to all the faculty members of Mechanical Engineering Dept. for their guidance and useful suggestions, which helped me in completing the seminar work, in time

RAHUL CHOUDHARY 8th Sem, ME, 10EAEME041

TABLE OF CONTENTSSr. No.TopicPage No.Candidate DeclarationiiAcknowledgmentiiiContentsivList of FiguresviAbstractsvii1. Introduction 1-121.1 Multiple-Cylinder Engines21.2 The Four Stoke Cycle Diesel Engine71.3 Classification of Engines91.4 Piston Connection101.5 Valve Arrangement101.6 Method of Fuel Injection111.7 Method of Engine Cooling111.8 Speed122. Construction and Details of Engine Parts13-332.1 Basic Engine Parts132.2 Cylinder Block142.3Alternative Fuel172.4 Cylinder Head182.5 Piston202.6 Connecting Rod252.7 Crankshaft252.8 Vibration Damper272.9 Main Bearings282.10 Valve Actuating Mechanism293. Combustion in the C.I. Engine and Fuel Injection System34--403.1 Combustion Stages of CI Engine373.2 Diesel Knock384. Multi Cylinder Diesel Engine Fuel Injection System41-514.1 Multi Cylinder Fuel Injection Pump414.2 Location of Faults424.3 Difficulty in Starting434.4 Cold Condition434.5 Correct Condition of Spray444.6 Water in the Fuel455. Excessive Exhaust Temperature52-535.1 Irregular Firing or Miss Firing525.2 Another Example546. Principle of Operation557. Working Multi-Cylinder Diesel Engines56-638. Application64-659. Multi Cylinder Diesel Engine Test Rig66Conclusion67References68

LIST OF FIGURE

Fig. No.Fig. NamePage No.Fig. 1.1 Multi cylinder diesel engine 2Fig. 1.2 Crankshaftfor a six cylinder engine 4Fig. 1.3 Multi Cylinder Diesel Engine Diagram 6Fig. 1.4 Four Stoke Cycle Diesel Engine 7Fig. 2.1 Cylinder Block 15Fig.2.2 Cylinder head and mountings 18Fig. 2.3 Nomenclature of piston 23Fig.2.4Crankshaft 25Fig. 2.5 Vibration damper and crank shaft pully assembly mounting 27Fig.2.6BEARING 28Fig. 2.7 Overhead valve mechanism 31Fig. 3.1 Schematic representation of disintegration of fuel jet in IC engine 36Fig. 7.1 Inline - The cylinders are arranged in a line in a single bank 57Fig. 7.2 V - The cylinders are arranged in two banks set at an angle to one another 58Fig. 7.3 Flat - The cylinders are arranged in two banks on opposite sides of the engine 58

ABSTRACT

In a Diesel engine with variably actuated valves, the cam controlling each inlet valve is shaped to provoke the opening of the respective inlet valve during the engine's normal exhaust phase and thus realize exhaust gas recirculation within the engine, due to the fact that during the normal exhaust phase, part of the exhaust gas passes from the cylinder into the inlet port, from where it returns to the cylinder during the next induction phase, while part of the exhaust gas that had previously passed into the exhaust port returns to the cylinder during the induction phase due to the additional opening of the exhaust valve, in consequence of which the exhaust gas charges that return to the cylinder are subjected to further combustion in the next engine cycle.

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