sistem pendingin dalam proses pendinginan mesin

belajar terus

1. Teknik Kendaraan Ringan
Semester 4
th
Class XI
Kompetensi Kejuruan
SK-KD 3
TH
ENGINE COOLING SYSTEM
AND COMPONENTS

2. Teknologi dan Rekayasa
Engine Cooling System
and Components
MAITENANCE AND SERVICE

3. DIAGRAM ALUR PENCAPAIAN KOMPETENSI

4. Teknologi dan Rekayasa
Coolant flows through the
engine to absorb excess heat.
Engine Cooling System

5. Teknologi dan Rekayasa
An ethylene-glycol
concentration up to 68
percent offers the best
protection against freezing.
Engine Cooling System

6. Teknologi dan Rekayasa
Ethylene-glycol coolant
has a high boiling point.
Engine Cooling System

7. Teknologi dan Rekayasa
Pressurizing the
coolant system
raises the boiling
point of the
coolant.
Engine Cooling System

8. Teknologi dan Rekayasa
Components and flow
patterns of a typical
cooling system.
Engine Cooling System

9. Teknologi dan Rekayasa
Many engines are equipped with a bleeder valve to permit a technician to bleed
any trapped air from the cooling system.
The valve is loosened as coolant is poured into the system.
Because air is lighter than coolant, the air tends to float toward the highest part
of the cooling system.
Engine Cooling System

10. Teknologi dan Rekayasa
The water pump is mounted on the front of the engine
block and is typically belt driven to ensure constant
coolant circulation whenever the engine is running.
Engine Cooling System

11. Teknologi dan Rekayasa
The water pump impeller’s spinning
blades apply centrifugal force to move the
engine coolant through the water pump.

12. Teknologi dan Rekayasa
With a cold engine, the thermostat stays
closed (A) to retain pressure and heat as
the engine warms up.
When the engine is warm, the thermostat
opens (B), allowing the coolant to travel to
the radiator to be cooled.
Engine Cooling System

13. Teknologi dan Rekayasa
The thermostat is a temperature-sensitive
component that is activated by an integral wax pellet.
Engine Cooling System

14. Teknologi dan Rekayasa
A typical thermostat location.

15. Teknologi dan Rekayasa
A spring-loaded bypass
valve opens under coolant
pressure, while the main
thermostat remains closed.
Engine Cooling System

16. Teknologi dan Rekayasa
The coolant tubes
and fins of the
radiator core.
Engine Cooling System

17. Teknologi dan Rekayasa
A downflow radiator has
vertical tubes and tanks at the
top and bottom of the core.
Engine Cooling System

18. Teknologi dan Rekayasa
A crossflow radiator has
horizontal tubes and a tank
on each side of the core.
Engine Cooling System

19. Teknologi dan Rekayasa
The pressure valve maintains the system
pressure and allows excess pressure to vent.
The vacuum valve allows coolant to return to
the system from the recovery tank.
Engine Cooling System

20. Teknologi dan Rekayasa
Most radiator caps are mounted on
the top or side tank of the radiator.
Engine Cooling System

21. Teknologi dan Rekayasa
Some radiator caps are mounted
in a remote location to provide
an accessible filling point.
Engine Cooling System

22. Teknologi dan Rekayasa
The recovery tank
coolant level depends on
the engine temperature.
Engine Cooling System

23. Teknologi dan Rekayasa
The engine-driven fan draws air
into the engine compartment
through the radiator core.
Engine Cooling System

24. Teknologi dan Rekayasa
Electric fans can be mounted directly to the
radiator, as required with transverse-mounted
engines on front-wheel drive vehicles.
Engine Cooling System

25. Teknologi dan Rekayasa
Electric fans can turn on at
any time, even when the
engine is shut down.
Always disconnect the power
lead before working around it.
Engine Cooling System

26. Teknologi dan Rekayasa
The flexible fan blade changes
shape to reduce operating drag and
noise as engine speed increases.
Engine Cooling System

27. Teknologi dan Rekayasa
The center of the clutch is
a fluid-drive that controls
the speed of the fan.
Engine Cooling System

28. Teknologi dan Rekayasa
The bimetallic temperature sensor
spring controls the amount of silicone
that is allowed into the clutch drive.
This action controls the speed.
Engine Cooling System

29. Teknologi dan Rekayasa
Radiator hoses must be large enough to carry full coolant flow,
and they must be kept in good condition to withstand the heat
and pressure of the cooling system and engine compartment.
Engine Cooling System

30. Teknologi dan Rekayasa
Core plugs seal holes that
lead to the water jackets.
Engine Cooling System

31. Teknologi dan Rekayasa
The heater core is a heat exchanger that is mounted
inside a heater housing on the bulkhead or inside the
passenger compartment under the instrument panel.
Engine Cooling System

32. Teknologi dan Rekayasa
This type of manually-operated heater control
valve is connected to the instrument panel heater
control by a wire cable.

33. Teknologi dan Rekayasa
This vacuum-operated heater-control valve uses a vacuum motor to
mechanically move the valve open and closed.
The vacuum motor responds to vacuum signals from inside the
passenger compartment, based on settings of the heater control
panel.

34. Teknologi dan Rekayasa
This engine is air-cooled.
Airflow over the cooling fins absorbs the excess engine heat.
The hot air is then used to warm the passenger compartment.
Engine Cooling System

35. Teknologi dan Rekayasa
Bibliography:
www. carrersnet.com
www.howstufwork.com

36. Presented by Anang Waskito
SMK Negeri 1 Magelang