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Presented by .. Abhishek Srivastav Department of Mechanical Engineering Kalyani Government Engineering College

This document discusses the construction and materials used in internal combustion engine components like the cylinder block, cylinder head, valves, pistons, and rings. It describes the cylinder block as a cast and machined part that has cylinder walls finished to a very accurate micron level surface finish. The cylinder head is also cast from iron or aluminum alloys and contains intake and exhaust valves, push rods, and manifolds. Valves are made of special alloys and opened or closed by springs. Pistons are typically made of aluminum alloy for its light weight and better thermal properties than cast iron. Rings seal the gap between the piston and cylinder wall and are made of various hardened materials.

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Saikat Roy
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57 views31 pages

Presented by .. Abhishek Srivastav Department of Mechanical Engineering Kalyani Government Engineering College

This document discusses the construction and materials used in internal combustion engine components like the cylinder block, cylinder head, valves, pistons, and rings. It describes the cylinder block as a cast and machined part that has cylinder walls finished to a very accurate micron level surface finish. The cylinder head is also cast from iron or aluminum alloys and contains intake and exhaust valves, push rods, and manifolds. Valves are made of special alloys and opened or closed by springs. Pistons are typically made of aluminum alloy for its light weight and better thermal properties than cast iron. Rings seal the gap between the piston and cylinder wall and are made of various hardened materials.

Uploaded by

Saikat Roy
Copyright
© Attribution Non-Commercial (BY-NC)
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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PRESENTED BY..

ABHISHEK SRIVASTAV
DEPARTMENT OF MECHANICAL ENGINEERING KALYANI GOVERNMENT ENGINEERING COLLEGE

Mr. DEBASISH BHATTACHARYA &


PROF. ARIJIT DUTTA

UNDER GUIDANCE OF PROF. TRIDIBESH DAS

SOURCES : a) MECHANICAL WORKSHOP

KALYANI GOVERNMENT ENGINEERING COLLEGE


b) PEARON EDUCATION LEARNING CD

CYLINDER BORE

CYLINDER HEAD BOLT BORE

OIL GALLERIES

CYLINDER BLOCK CONSTRUCTION


1. It is the basic framework of the engine

2.

The cylinder block is basically a casting product.

3.

The cylinder block is machined and honed to a very accurate finish for good lubrication and ring seating.

4.

The cylinder walls are finished to 1 micron finish with a fine rotating hone.

5.

An intersecting visible cross-hatch pattern is produced by the hone form.

CYLINDER HONNING PROCSS

CENTRE THE DIRLL PRESS OVER THE HOLE DRILLED

TO DRILL THE HOLE TO THE DESIRE DEPTH

COUNTERSINK THE HOLE

FRESLY DRILLED AND COUNTER SUNK HOLE

TAP THE THREAD INTO HOLE

BLOW THE COMPRESSED AIR TO CLEAN & DRY SURFACES

APPLY THREAD LOCKING COMPOND TO THE TIME SERT

USE THE HEX KEY TO TIGHTEN THE TIME SERT

A PUNCH IS USED TO TAP THE PRONGES FLUSH

THIS IS THE FINISHED TIME SERT THREAD

ENGINE VALVES & SPRING There are three types of engine valves. Used to admit the air fuel mixture in cylinder and force the exhaust gas out.

1.
2 3

Poppet valve
Sleeve valve Rotary valve

Silicon-chrome steel containing 0.4% carbon, 0.5% manganese, 0.5% nickel and 8% chromium is used for inlet valve material, whereas for
exhaust valve nimonic alloy is used consists of 0.05% carbon, 1% manganese, 0.6% silicon, 20% chromium, 2% cobalt, 2.5%titanium, 1.2%aluminium 5%iron and remaining nickel. Helical spring with ground and flat end. These are generally made from high grade spring steel wire. Materials are generally hard-drawn carbon steel or chrome vanadium steel

VALVE OPENING AND CLOSING

SPRING RETAINER

VALVE SEAL

VALVE GUIDE

MARGIN

VALVE SEAT

GOOD VALVE SPRING

BAD VALVE SPRING

ENGINE HEAD (K.G.E.C. WORKSHOP) EXHAUST MANIFOLD


INLET MANIFOLD

EXHAUST VALVE INLET VALVE

PUSH ROD

CYLINDER HEAD CONSTRUCTION

1. Cylinder head is cast using cast iron and aluminum alloy.

2. Aluminum alloy is used for weight reduction and greater thermal conductivity.

3. Aluminium alloy containing 3% copper, 5% silicon, 0.5% manganese in matrix of aluminium.

SUMP IS MADE OF PRESSED STEEL OR ALUMINIUM ALLOY

K.G.E.C. WORKSHOP

OIL PAN TO STORE OIL FOR ENGINE LUBRICATION

GASKETS

1.

Gaskets are used to provide the tight fitting joint between two surfaces.

2.

Used between cylinder head and block, crankcase and oil pan, between cylinder block and manifold or water pump.

3.

Cork, asbestos and rubber are used as cork material.

METAL SANDWITCH TYPE GASKETS FOR PASSENGER CAR, TRUCKS

CRANK-SHAFT

PISTON

The material used for the piston Once was

The advantage over Aluminium alloy Is its

Cast iron Lighter

But now
Weight

Aluminium
But alloy Higher Containing Silicon Will Be used

Co-efficient Of expansion

COMPRESSION RING CHROMIUM FACING MOLYBDENUM FACING

OIL RING

PISON RING ASSEMBLY

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