Dia 1
Dia 2
Dia 3
Dia 4
Dia 5
Dia 6
Dia 7
Dia 8
Dia 9
Dia 10
Dia 11
Dia 12
Dia 13
Dia 14
Dia 15
Dia 16
Dia 17
Dia 18
Dia 19
Dia 20
Dia 21
Dia 22
Dia 23
Dia 24
Dia 25
Dia 26
Dia 27
Dia 28
Dia 29
8.18M
Category: mechanicsmechanics

Diesel engines

1. Dia 1

mu

2. Dia 2

A slow speed or medium speed Diesel engine
is a high pressure propulsion plant
with internal combustion.

3. Dia 3

In a V-engine the cylinders are placed in an oblique (or bevel)
position, unlike the in-line engine, where the cylinders are
placed “in line”.
s
V-engine
In-line
engine

4. Dia 4

S

5. Dia 5

s

6. Dia 6

cylinder
S
The cylinder is filled with air.
During the compression stroke
the air in the cylinder is
compressed.

7. Dia 7

The atomizer
1
The atomizer (1) sprays the fuel
into the cylinder.
The nozzle divides the fuel into
small particles.
atomizer
Tip of the atomizer
(nozzle).

8. Dia 8

The power stroke
1
During the power stroke the fuel is
injected and burnt.
This actuates the piston(1)
and
connecting rod (2).
2

9. Dia 9

The piston
Piston
The piston makes a
reciprocating motion.

10. Dia 10

The crosshead
The crosshead (1) serves as a
hinging connection between
piston rod (2) and
connecting rod (3).
2
1
3
Crosshead guides and
crosshead guide shoes (4)
absorb the forces onto
the crosshead when the piston
goes down.
4

11. Dia 11

The crank (1)is connected
to the crankshaft (2).
S
2
1

12. Dia 12

The crankshaft
The crank changes the
reciprocating motion of the
piston into a rotary motion
of the crankshaft .
S

13. Dia 13

The camshaft
Gearwheels
to drive the camshaft
are driven by chains
(“chaindrive”).
S
camshaft

14. Dia 14

The camshaft
The campeak is fixed to the
camshaft.
campeak
S
campeak

15. Dia 15

3
The pushrod
The push rod (1)
may be used as a distance piece
between campeak (2)
and rocker arm (3).
1
2
s

16. Dia 16

2
The exhaust valve
1
The exhaust valve (1)
is actuated (opened) by the
rocking lever (2) (rocker arm).
S

17. Dia 17

1
The exhaust valve
The exhaust valve
is actuated (closed)
by the exhaust valve spring (1).
S

18. Dia 18

The scavenging system
2
1
S
The scavenging air manifold (1)
and scavenging ports (2)
supply the scavenging air
to remove the exhaust gases.

19. Dia 19

SCAVENGING SYSTEMS
CROSS
SCAVENGING
LOOP
SCAVENGING
S
UNIFLOW
SCAVENGING

20. Dia 20

Cooling the cylinder:
1
2
S
The cylinder liner (1)
and cylinder jacket (2)
form the cylinder wall.

21. Dia 21

Cooling the cylinder:
A coolant (fresh water)
is injected between
liner and jacket
to cool the cylinder.
s

22. Dia 22

Cooling the piston:
The piston is cooled by oil.
s
The advantages of oil as
a coolant are:
. it reduces noise;
. it purifies;
. it forms a seal;
. it lubricates;
. it is anti-corrosive;
. it has a higher resistance
to heat.

23. Dia 23

Piston rings
1
The piston rings (1)
form a seal around the cylinder
and carry away the heat.
SO
Piston rings

24. Dia 24

s

25. Dia 25

During the air induction
stroke
(or inlet stroke,
or suction stroke)
air is drawn into the cylinder.
S

26. Dia 26

During the
compression stroke
the air in the cylinder
is compressed.
S

27. Dia 27

During the power stroke
fuel is injected
and burnt.
S

28. Dia 28

During the exhaust stroke
the exhaust gases are
driven out of the cylinder by
the piston.
S

29. Dia 29

The
International Maritime Language Programme – IMLP
C
The IMLP is an IMO-standard.
P.C. van Kluijven
English     Русский Rules