jurnal Chapter 1 Diesel bhs.inggris

8/15/2019 jurnal Chapter 1 Diesel bhs.inggris

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CHAPTER I

Preliminary

INTRODUCTION

a. Background of the study

Development in science and technology (Science and Technology) is rapidlyincreasing. Nowadays, it has an impact on the world of education with the growing

challenges faced by the world of education. Now, the world of education increasingly

requires to produce qualified human resources, who are able to answer and anticipate

development in science and technology. The world of education should be able to mae it

happens.!t is necessary to increase and to improve human resources in education.

"ne effort peningaatan and improvements in education especially in the field of automotive

engineering in particular, one engine stand Diesel #itsubishi $ %&&.#itsubishi $ %&& is the

type of vehicles manufactured by #itsubishi Diesel type, while the #itsubishi $ %&& stations

in the boo there is an additional 'S (gasoline) that #itsubishi $ %&& 'S (#itsubishi $ %&&

types of gasoline). ngines #itsubishi $ %&& in which there are several systems, among other energyproducing drive systems or the engine (engine), fuel system, lubrication system,

cooling system, charging system and the system of the engine (engine). This paper will

e*plain how the later analysis and how to cope with reduced engine power on Diesel

#itsubishi $ %&&, especially on the engine (engine). "ther things the bacground for the

selection of the matter is+ The machine system is very important in the wor process,

propulsion and energy production in a vehicle or car. The machine consists of several

components, if any one of the components undergo wear and tear or curvature caused by the

heat wor and then there will be an interruption in engine power is reduced as caused by

several reasons such as worn piston rings, cylinder head and cylinder bloc surfaces are

curved causing the gas lea and the engine power produced less than optimal.

b. Formulaion o! "e #roblem

hy is the engine system very important in the process of wor, drive and energy production

in a vehicle or car-

c. Ob$eci%e o! "e &udy

To describe the importance.


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CHAPTER II

'ITERATURE RE(IE)* RE(IE) OF RE'ATED 'ITERATURE

)orking Princi#le +oor Die&el

The principle of motor diesel

#otor fuels are of two inds, namely combustion engine (internal combustion angine) and

e*ternal combustion engine (e*ternal combustion engines), e*amples of e*ternal combustion

engine (e*ternal combustion engine) is a steam engine, turbine and other machines, eg

combustion engine (internal combustion engine) is a Diesel motors, motor gasoline, and

others.Type of car or vehicle is based on the combustion mechanism used divided into two

diesel motors and motor gasoline (internal combustion engine). Diesel engine combustion

mechanism nown as compression ignition. The fuel is compressed until the pressure / 01 s 2

d %0 g2cm0 (Daryanto+ 3441) in order to reach the point of ignition and fuel burn by itself,

while the gasoline engine using spar ignition mechanism.

5uel pressure until a certain pressure is+ / 31 s 2 d 00 g2cm0 (Daryanto, 0&31)

The world of education requires qualified human resources. Diesel #otor use diesel fuel in

addition to its use more efficient, diesel fuel is also more environmentally friendly because

the solar mi*ture of lead (lead) that cause pollution and respiratory disturb less than gasoline

motors, but because **i pressure ratio compression ignition mechanism very high and require

a more robust construction, in general, the price of cars by using Diesel engines are more

e*pensive than the car using gasoline motor for the same class. The wheels of a vehicle

requires a power which allows the vehicle to move, and can cope with the situation, the air,

and so forth. Sources that generate power are called machine .. combustion engine piston is

the name of the machine that can convert thermal energy, electricity, wind or other power

source into mechanical power. ngine that converts heat energy into mechanical energy is

called motor fuel. ngine (engine) used in automobiles, is one of a series of components

(system) is very important that as a system that converts the heat generated from the

combustion process is then converted into wor through the mechanism of translational

motion straight bac and forth (reciprocal) of the piston ( piston) into a rotary motion

(rotation) on the cranshaft

(6anshaft). #achines energy used in the car to be compact, lightweight and easy to put on

limited space. #achine shall provide a high speed and power are great, easy to operate and is

less of a sound, and therefore gasoline and Diesel engines are generally more widely used in

the vehicle or car.

7dvantages Diesel engines than gasoline motors in general+a. Diesel engines have a large thermal efficiency, this means that the use of more fuel

economical than gasoline motors.

b. Diesel engines are more durable and do not require an electric ignition (lectri !gniter) to

support combustion so less difficulty than the gasoline motor.

c. Speed is lower than gasoline motors.

Diesel motors disadvantage compared with the gasoline motors

general +

a.Teanan nearly twice the ma*imum burning gasoline motor 01 s 2 d %0 g2cm0 (Daryanto

3441), it causes vibration and sound bigger Diesel motors.


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b.Teanan higher combustion, the diesel engine must be made of materials that resist high

pressure and the structure of the material is more powerful, it causes vibration and structure

stronger material, this led to the maing to be more e*pensive than gasoline motors.

c.#otor Diesel fuel in8ection systems require precise causes are e*pensive and require carefulcare and maintenance than gasoline motors.

DIE,E' +OTOR OPERATIN- PRINCIP'E ,TEP FOUR

A. ,TEP ,UCTION

!n step suction, air is introduced into the cylinder. 9lunger (piston) evauman in cylindricalform as in motor gasoline. 9lunger (piston) moves from top dead point towards the bottom

dead point and at this stage only the suction valve opens and allows air into the cylinder and

e*haust valves are closed during this suction action.

B. ,TEP CO+PRE,,

!n the compression stroe, the piston (piston) moves from bottom dead point towards the top

dead point, and at the compression stroe is the second valve is closed. The air is suced

during suction pressure to step up the pressure with a temperature of about 1&&& 6 to :&&&.

C. ,TEP CO+BU,TION

!n step combustion, the air contained in the cylinder is driven by a piston (piston) into the

combustion chamber at the top **iv each cylinder, at the end of step no;;le spraying burning

fuel and then a mi*ture of fuel and air later burned by the heat pressure generated by the heat

generated by the combustion energy mengespansian pressure gas very quicly and plunger

(piston) pushed down. The force pushing the plunger (piston) to be forwarded to the shaft

bottom (connecting rod) and then forwarded to the cranshaft (cranshaft) and the change

from a straight bac and forth motion of translation into

rotary motion (rotation) untumemberi power on the machine.

D. ,TEP )A,TE

!n step e*haust, piston head from the bottom dead point towards the top dead point. !n this

step only the e*haust valve opens and the e*haust combustion gases e*pelled through the

e*haust valve. 'as will be spilled out when the piston (piston) reaches top dead point, once

the process begins again step step waste suction, and so on. This process occurs over and over

again. During the machine, completing the four steps (steps suction, compression,

combustion, e*haust) cranshaft (cranshaft) spins twice and produced a onetime

combustion (power), or also called Diesel fourstroe motors.


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jurnal Chapter 1 Diesel bhs.inggris

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