10 Terms You Should Know About Automobiles | part-2

One thing everyone knows “remember the basics”. without knowing the basics, you cannot go for further steps. hence, we trying to add all the basic terms of automobiles. The below short introduction explains terms and their major function. this is the second part of the post you can read the part one by clicking here.  

11.Fins: fins are the extended surface of a thin metal strip to increase the heat transfer coefficient. The heat transfer happens with the second mode of heat transfer known as “convection”. The use of fins determined by the effectiveness. For different-different material, the effectiveness varies. If the effectiveness of fin is less than 2 than the use of fins is satisfied. Fins are most commonly used in heat exchange devices such as radiators in cars and bike’s engine.

also read: heat flow – modes of heat transfer

12.Gears: Gear is a mechanical device which transmits power with cut teeth. A gear can mesh with a linear toothed part, called a rack, thereby producing translation instead of rotation. When two are more gear are working in mesh to transmit power this arrangement is known as a gear train. Shifting gears change gear ratio and also change transmitting power. Many alloy, cast irons, and plastics are used for manufacturing of gears.

13.Four Stroke: Four stroke of piston or two revolutions of the crankshaft is required to complete the one cycle. The volumetric and thermal efficiency of the four-stroke cycle is higher. And additional lesser lubricants required. Suction, compression, expansion and exhaust stroke are the different process in four stroke cycle consist.

14.Two Stroke: two stroke engine pistons complete the cycle in one revolution. It consists port mechanism and low weight. No suction and exhaust operations take place. The compression and expansion operations take place inside the engine. Inlet and exhaust operations take place due to pressure drop. The volumetric and thermal efficiency of the cycle is comparatively lower. The cooling requirement for two stroke engines is greater.

15.Multi-cylinder engine: Increasing the number of cylinders increase the overall rpm of the vehicle. Multiple cylinders mean more than one cylinder used in one vehicle. The cylinder arrangement is designed according to need by automakers.    

16.Choke: The choke is a modern mechanism of the carburetor. The choke arrangement provides rich mixture supply during the starting period or low-speed condition. A choke creates the pressure drop and provides rich fuel mixture. Normally the rich mixture means the air-gasoline ratio is 8:1.

17.Suspension: Suspension is an arrangement which is provided in vehicles to absorb shocks. The suspension required advanced spring mechanism.  

18.Torque: you can relate torque meaning with rotational force. the car can accelerate at how much speed(RPM) depends upon torque. Torque is the turning effect shaped by the engine.      

19.Engine Cooling: the high engine temperature makes an impact on exhaust valve and chances of preignition increases. Depending upon the temperature of the engine the coolant or lubricants are used. above the predetermined temperature, the lubricants oils work very rapidly and save many operating components like the piston. Overall the basic need of coolant to reduce overheating.  

20.Governor: Governor is speed control device which regulates the engine speed after crossing the predetermined limit. The loads in the engine keep fluctuating time to time. Normally to achieve higher efficiency of an engine, the governor is used to keep constant as possible. There are some methods used for governing.   


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