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Automobile Engineering

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Published in: Mechanical
8,262 Views

Introduction to Automobile Engineering

Rajesh S / Hyderabad

8 years of teaching experience

Qualification: M.tech

Teaches: Chemistry, EVS, Mathematics, Physics, Drawing, Mechanical, Production

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  1. lNT_$9puc ??? -?? ???????-?? ENGINEERIN
  2. LIST OF THE TOPICS SUPERCHARGING TURBOCHARGING ENGINE LUBRICATION SPLASH AND PRESSURE LUBRICATION SYSTEMS OIL FILTERS,OILPUMPS CRANK CASE VENTILATION ENGINE SERVICE REBORING DECARBONISATION Page 2
  3. SUPER CHARGING ' Supercharging is a method of increasing an engines power output, by forcing air into the engine under greater than atmospheric pressures. ' Supercharging usually refers to belt driven compressor (I.E. roots/screw or centrifugal) even though it technically includes turboes. Turboes are when used charging. e aus4 driven compryssors and esua!lwefereå to as turbo page 3
  4. SUPER CHARGING ' Superchargers can come in a number of different designs and are mechanical driven units. These can be Belt, Direct Drive, Gear Drive, Chain Drive and Electrical Drive driven systems. Finally, no special shutdown procedure is required with superchargers. Because they are not lubricated by engine oil, they can be shut down normally ' Superchargers are still the most cost-effective way to increase horsepower. superchargers can result- power aæaepercei)t, making th great for ra mg, fow$lfeavy loads or Just,åadding excitement Co typtC*l driving experience
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  7. TURBO CHARGING Turbo charging one of the methods to boost engine power is called a Turbocharger (turbo). It uses exhaust gases exiting the engine to drive a set of propeller fins or a turbine to increase volumetric air intake pressures. More air at a greater pressure equals more fuel being efficiently burnt and more power produced by the engine. Limited use in Petrol Engine but is extensively used in Diesel Engine because - increase in power output, ratio, better torque power loss Lte In air qensity atåhigher altitudes re gas emission) page 7
  8. TURBO CHARGING COMPRESSOR SECTION "0uwrß h. TURBINE SECTION 3
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  10. BENEFITS OF TURBOCHARGING The benefits of Turbo charging are 1. 2. 3. increased engine power output (in the region of 50% increase) improved fuel consumption (improved pressure balance across the engine) improved emissions Page 10
  11. Turbo Induction System Exhaust Manifold Turbo Air Inlet Manifold Exhaust System Engine .00 Air Filter Copywrite Rapid-Racer.com Intercooler e 11
  12. ENGINE LUBRICATION Engine lubrication system is designed to lubricate, cool the engine by heat away the moving parts and keep the engine clean d\by delivering clean oil at correct temperature and pressure. The oil from the sump is sucked into the pump and force through an oil filter under pressure to the main bearings and oil pressure gauge. Lubrication is the rocess or techniqÄmploy to reduce botf close proximity nd movi&relat1veAtogeach other by interposin uytan&s called lubricant petweeri the Page 12
  13. ENGINE LUBRICATION Engine Lubrication is carried out by two systems. 1. Splash Lubrication System 2. Pressure Lubrication System Main Parts Engine Lubrication System 1. Oil Sump: The container contains lubricating oil made out of metallic sheet attached to the crank case is an oil sump. 2. Oil Pump: It is the pump which circulates oil under pressure to the gallery & drilled passages. tos lubricate the various engine part from the pump body to Ischargg Connected' wit pilsgallery Page 13
  14. ENGINE LUBRICATION 3. Oil stainer: It is a fine screen, fitted at the inlet of the oil pump to prevent the entrance of any foreign matter to the lubricating system. 4. Oil pressure gauge: It is a gauge which indicates the oil pressure of the Lubrication system is called oil pressure system. 5. Oil filter: It is the filter which cleans the oil by removing the s L agicles of foreign patter from the 1 e 14
  15. rocker arms push rods tappet oil galleries timing chain tensioner crankshaft drive shaft (powers pump) oil pan (sump) pump (circulates oil) rocker shaft valves cylinder head camshaft Oil gauge Oil filter floating oil intake and screen @ 2007 Encyclopaedia Britannica, Inc. Page 15
  16. DECARBONISATION ' Petrol and diesel engines build up carbon deposits inside the cylinders over a period of time. This carbon build up happens for various reasons 1. from improper burning of fuel, 2. to substandard fuel quality and general build up with age. 3. It deposits itself as soot around exhaust valves, in the exhaust, on the cylinder head, on the piston and on the intake and exhaust manifold. There are two ways i which an engine can be decarbonizes 1 .Chemical Deca isation 2. Physical D cåbonlsatiofr.— Page 16
  17. TYPES OF DECARBONISATION Chemical decarbonisation involves running a chemical compound along with the fuel through the engine to breakdown carbon deposits. This then gets flushed out along with the exhaust gases. For engines that have severe carbon build up, a chemical decarbonisation won't be quite effective. In this case, one will need to do a physical decarbonisation procedure. This involves opening up the cylinder he valves and p off the valv ing the jntalse*nd exhaust man f Ids. Page 17
  18. Decarbonised Area Volvo and Spring Spark Plug EXHAUST pentrOOf Combustion Chamber Piston wwwood0ymanocomomy page 18
  19. Values Combtistion
  20. Piston Head Page 20
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