ENGINE CYLINDER&

ENGINE TYPES

MUMTAZ ALI PANHWAR

12ME69

A cylinder is the central working part

of a reciprocating engine.

OR

The space in which a piston travels is

also known as Engine cylinder.

Cylinders may be sleeved(lined with a

harder metal) or sleeveless ( with a

wear resistant coating such as Nikasil).

A piston is seated inside cylinders by several

metal piston rings .

These piston rings are fitted around piston

outside surface in machined grooves,

typically two for compression sealing and one

to the seal oil.

Single cylinder engines

AND

Multi cylinders engines

A single cylinder engine is a basic

piston engine configuration of an

internal combustion engine.

Single cylinder engines are simple

and compact and will often deliver

the maximum power possible within

a given envelop.

It often seen on motorcycles,

auto rickshaws, motor scooters ,

garden machinery , automobiles

and tractors , etc.

A multi-cylinder engine is a reciprocating,

an internal combustion engine with multiple

cylinders.

The more cylinders, the more power .

Multiple cylinders have better torque ,

efficiency and are better balanced.

Consider a engine containing four cylinders,

the firing order such not like that 1-2-3-4

because if we are supplying the air in

cylinder number 1, the fire is take place

inside the cylinder so for the cylinder

number 2 the air is not sufficient. So that

affects the efficiency.

So the firing order should be 1-4-3-2 or

1-4-2-3.

When the number of cylinders are more, the

more power will be produced but less fuel

economy and vice versa.

It’s not all completely correct, in some case

a multi cylinder engine can have a better

fuel economy as compared to a single

cylinder engine, it depends on the capacity

of the cylinders and the size of valves and

how much they allow the fuel and air

mixture( In S.I engines or petrol engines) or

air for diesel engines.

The engine types are :

Flat

Inline

V – type

W-type

Wankel

The engine types are usually

used in the following order,

depending on the number of

cylinders: I-4, V-6, V-8, V-10,

V-12, W-16.

Flat engines are called flat because that is

exactly what they are. The cylinders lie flat.

Half of the cylinders are located on one side

of the crank shaft and the other half on the

other side.

The advantage to having your cylinders

horizontal is that the engine can be placed

lower in the car. This makes the car more

stable because of a lower center of gravity

Inline engines have cylinders on top of the crank

shaft.

They stand inline at a vertical 90 degrees.

Inline engines run smooth and can provide a lot

of power. The engines, though, are longer then

any other type.

. In cars today, most inline engines have small

cylinders so length is not an issue. Above all,

Honda's and many imports of today are known

for their inline 4's today. Usually I-4 or I-6 for

cars. Some marine engines have been made that

use the I-Engine type with up to 14 cylinders.

The cylinders are arranged in a V pattern.

V-8's and V-6's engine types exist today in

many American cars and trucks.

The cylinders are located on oppsite sides of

the crank shaft and are elevated up a varying

amount of degrees depending on the

manufacturer.

The V-type engine is known for using a

pushrod valve system. Usually V-6, V-8, V-10,

and V-12.

In W-type engines, the arrangement of

cylinders are of W shape.

W-Type engines are found in few cars.

W-engine types work well for a large number

of cylinders because everything becomes

more compact and shorter. Though, they are

more compact, the disadvantage is that they

are hard to fix and more expensive to repair.

Wankel engines are also know as rotary

engines.

Wankel engines are completely different

from any other type of automotive engines.

It does not have pistons.

Rather a single triangular rotor spins around

a peanut shaped chamber. The triangular

rotor is a special type of triangle also known

as a Reuleaux triangle. This triangle has an

equal diameter relative to the center at all

times.

. The shape it is based off of an equilateral

triangle. The reason this type of triangle is

necessary is to ensure a seal during the

triangles rotation at the center of the

housing. There is a single straight shaft

through the center of one of these engines

that serves the purpose of a crankshaft in an

Otto cycle engine, Otto cycle is the 4-stroke

cycle in a regular piston engine. Wankel

engines are found in Mazda RX-7's and RX-8's