BASIC ELECTRICAL AND ELECTRONICS ENGINEERING BASIC Automobile Electrical and Electronic Systems Third edition ficcocaldiskpros.gq 4/22/04 PM. Automobile engineering is the one of the stream of mechanical engineering. It The automobile can be considered to consist of five basic components. Text books: ficcocaldiskpros.gqbile Engg. By R.K. Rajput, ficcocaldiskpros.gq ficcocaldiskpros.gqbile Engg. By ficcocaldiskpros.gql, Vol.I & II, Umesh Pub. ficcocaldiskpros.gqbile Mechanics (through problem).
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PDF | The term automobile or automotive stands for a vehicle which can be moved by itself. Therefore, an automobile is a self-propelled vehicle. Chassis: Engineering Principles, Automotive Engineering e- Mega Reference, .. Pictorial view of the basic engine. BASIC AUTOMOBILE ENGINEERING. L T P. 3 1 -. RATIONALE. A diploma holder in automobile engineering should have an overall view of automobiles.
These jackets are cast integrally with the cylinder block. During normal engine operation, cylinder walls will wear out-of-round, or they may become cracked and scored if not properly lubricated or cooled. The wet-type liner comes in direct contact with the coolant and is sealed at the top by a metallic sealing ring and at the bottom by a rubber sealing ring.
The dry-type liner does not contact the coolant. The lower part of the block crankcase supports the crankshaft the main bearings and bearing caps and provides a place to which the oil pan can be fastened.
On L-head in-line engines, the intake and exhaust manifolds are attached to the side of the cylinder block. On L-head V-8 engines, the intake manifold is located between the two banks of cylinders; these engines have two exhaust manifolds, one on the outside of each bank.
Minimum no of valves required per cylinder are 2 one for inlet and one for exhaust. More no of valves per cylinder allow the engine to breathe easily. This type of arrangement is used in conventional cars and is superior to the older arrangement which had push rods to operate the valves. It represents the size of Engine Combustion Chamber E. Size of WagonR engine is cc, cubic centimeters. Thus the power to weight ratio must be observed. Power to weight ratio PWR is the ratio of bhp power to the weight of the vehicle in tons.
Resistance to relative motion between two dry objects — Greasy friction: Friction between two solids coated with a thin film of oil — Viscous friction: Resistance to relative motion between adjacent layers of liquid.
Related Papers. By Taylor Lee. With the help of injector pressure we can calculate the amount of fuel needed, through the following formula: Est. Horsepower x B. During the drive torque, what will be the weight shift? In case of cars the torque is applied to the rear wheels, thus limiting accelerator due to front wheel drive due to weight transfer.
This drive is bolted to the chassis of the car. Modern manufacturers therefore design rear wheel drive to have similar handling to front wheel drive wherever possible via suspension tuning. In a tractor, how the hydrostatic propulsion systems work? In a tractor the pressure is same, so the force given by the liquid to the surrounding is equal to the pressure X area.
Explain the reason that why the tyres are always black in colour. Is this phenomena related to the heat conduction?
Tyres colour is black due to the proportion of carbon mixed in it during the vulcanization of the rubber, to make the tyre shear resistant. Thus carbon is responsible for giving tyres the prominent black colour. Adding of carbon prevents tyres from rapidly deteriorating because when ozone combines with the ultraviolet light from the sun. It attacks the polymer of the tyre. What is BHP? How can you measure BHP? It reflects the powerfulness of the brakes of the vehicles. BHP stands for how much power will be required to make the engine stop working i.
Pi is 3. What will happen if someone adds oil to the fuel of four stroke bike engine? This will result in damaging of the engine faster. Adding oil will lead to the higher wear and tear of the cylinder liner, piston and damage to the piston.
It will lead to abnormal combustion and knocking and detonation.
Dark smoke and abnormal sounds will be generated by the engine. One should not mix oil with the fuel of four stroke engine. How will you differentiate between two stroke engine and four stroke engine?
In case of two stroke engine, rotation of crank shaft will be power stroke for every two rotations. During compression stroke, fuel will flow towards the crank case suction and during power stroke, exhaust will emit the burnt fuel through the transfer ports. While in case of four stroke engine, rotation of crank shaft will be power stroke for every four rotation. Moreover, suction compression power and exhaust strokes are separate as there will be inlet and exhaust valves.
What is the size of the recommended compressor CFM? Where it can be used?
It is generally used in spray painting of very small areas. It can be used where painting with brush is very difficult. Usually reciprocating compressors are used but size depends on requirements.
What is the range of engine efficiency in case of two stroke engine? The two stroke engines have very high range to be compared to the four stroke engines. Because power stroke is generated every two revolution while in four stroke, power stroke is generated every four revolutions.
What do you understand by CC of engine? The meaning of CC is cubic centimeters. It represents the total volume of the engine cylinder. This reflects that the engines with more CC can generate more powers than the other engines. CC can also be related as inversely proportional to the fuel consumption.
What is back compressor in engines? Back compression means the compression capability of the engine. An diesel engine can compress at the ratio of to as high as Thus the higher compression leads to better efficiency of the engine.
How air conditioners work in cars? Air conditioners are based on the principles of evaporation and condensation and then compression and expansion. The hot air of the car is removed by the process of evaporation and then the condensation of the evaporated air takes places which is then further compressed by the compressor and then finally expanded to us in the form of cold breeze.
Somehow, Air conditioning reduces the average of the car, as the energy is required to remove the hot air and then compression and expansion. What are three methods of heat transfer? Three methods of heat transfer are conduction, convection and radiation.
Conduction: The transfer of energy by collisions between the atoms and molecules in a material. Convection: Transfers heat when particles move between objects or areas that differ in temperature. Radiation: The transfer of energy by waves. Due to non-conducting nature of plastic, it is widely used for the electricity purposes. Moreover, plastic is cheap and strong so it is less prone to damage. Furthermore, plastic does not bend and does not slips from the users hands.
Does diesel engine powered automobile use unit pump and unit injector? Whereas,in common rail systems it is independent of engine speed. If we use gasoline in diesel engine, what will happen? Adding gasoline to the diesel engine may blast off the engine. Compression ratio of the petrol engine is 6 to 10 and diesel engine is 15 to Thus gasoline will get very highly compressed and might result in blast off engine. What is octane number and cetane number?
Octane number can be defined as the percentage, by volume, of iso-octane in the mixture of iso-octane and h-heptane.
It is the measure of rating of SI engine. While cetane number can be defined as the percentage,by volume, of n-cetane in the mixture of n-cetane and alpha methyl naphthalene.
It is the measure of rating of CI engine. Explain the significance of governor in automobiles? Governor is an important component of automobile engine. It is used to regulate the main speed of engine during the variations in loads. With the variations in the load, fuel supply has to be maintained. This task is performed by the governor. In the case of high load on the engine, speed decreases, hence fuel supply has to be increased and similarly when load decreases then the fuel supply has to be decreased.
What is the reason for emitting the white exhaust smoke during start of the vehicle? How will you prevent this? The main cause of white smoke is water or anti-freeze entering the cylinder, so the engine starts to burn it with the fuel. That white smoke is nothing but steam. Prevention measures: There are special gaskets i. This anti-freeze will produce a white steam which will accumulate at the tailpipe area.
These systems are sequential systems, in which injection is timed to coincide with intake stroke of each cylinder. TPFC stands for transient power fuel control system.
In this type of systems constant choke carburetor is used. The salient feature of this carburetor is that it provides jerk less engine raise.
In these systems, throttle valve creates vacuum which opens the slide which controls the air fuel ratio through a tapered jet. What is SAE? Mention the importance of SAE to the automobile domain.
SAE stands for society of automotive engineers. This society is responsible for developing the standards for the engineering of powered vehicles of all kind. The vehicles may include car, boat, truck and even aircraft.
SAE has developed standards for ground vehicles and aerospace vehicles.