Parts of Suspension : Spring

The kind of spring, that usually to use is coil spring, leaf spring, torsion rod spring, air spring, and rubber spring
Coil Spring made from steel spring steel with treatment heat. Coil spring must use a long arm to hold the wheels on alignment. Coil spring usually use on passenger vehicle to give comfort.
Leaf Spring made from steel spring with treatment heat. Leaf spring hold pivot and wheels on alignment without additional arm. Leaf Spring usually use on truck and commercial vehicle.
The long torsion rod spring made specially from heat treatment and twisted on under suspension arm and others top placed on vehicle framework.
Air Spring use on big vehicle like bus. Air Spring is additional power with wave rubber, which contains high pressure air like spring and need suspension arm.
Rubber Spring use on small vehicle, need suspension arm and combination with hidraulic system. Read More..

Purpose and Parts of Suspension

Suspension use to:

- Spring became available to place on each wheels and body to reduce the whells shock.
- Save the wheels on true alignment, so can move to up and down on their springs
Parts of Suspension :
- Spring
- Suspension arm
- Suspension pivot
- Shock absorber
- Stabilizer
- Bump stop
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Fuel Pulsation Damper

Fuel Pulsation Damper use to absorb the pressure evolving on pressure channel because of injection. Pressure Regulator will defend the fuel pressure in intake manifold Read More..

Pressure Regulator

Pressure Regulator use to control the fuel pressure to injectors. The fuel sum which injected, control from signal, which give to injector. So, the pressure on each injector is same. The fuel and a situation in which vacuum exists pressure on input channel must around 2,55kg/cm3. Read More..

Fuel Pump

Fuel Pump use to distribute fuel from tank to injector. There are 2 kinds of fuel pump:
- Electronic pump:
Electronic pump can place anywhere on fuel channel. Electronic pump use electronic power for pump the fuel when the engine start and when the engine is on.
- Mechanic pump:
Mechanic pump place beside engine and moved by crankshaft Read More..

Fuel Tank

Fuel tank usually place on back and on the bottom of a car. Fuel tank use to take in the fuel. On passenger vehicle, fuel tank made from thick steel sheet. Fuel tank place on a vehicle with a filter. On the fuel tank, there is a meter for measure the fuel height for know the fuel sum unit sender.
Sender unit consists of a float, which connect to electronic resistor coil. The fuel indicator can read on panel instrument. There is a separate metal sheet on fuel tank for reduce fuel surface. Read More..

EFI (Electronic Fuel Injection)

EFI (Electronic Fuel Injection) use on petrol engine to change carburetor. EFI (Electronic Fuel Injection) is better than use carburetor.
EFI (Electronic Fuel Injection) can difference became 2 kinds:
- D-EFI (Speed Density Control Type) – base on a situation in which vacuum exists in
intake manifold and air volume sensor base on thickness.
- L-EFI (Mass Flow Control Type)- Air sum which in to intake manifold control with air flow meter.
L-EFI is better than D-EFI to detect air sum entering.
EFI (Electronic Fuel Injection) is better than use carburetor because:
Ignition is better and HC on throw gas more low, specially during the speed decrease. On - This time, the input air reduce and a situation in which vacuum exists is big. On
carburetor, the fuel, which on input channel will go into combustion chamber because happen a situation in which vacuum exists suddenly. The mix became good, so the ignition (combustion) isn’t good and HC became much. On EFI, the fuel injection can ended when the air valve close.
- Motor can easily turn on low temperature. If use carburetor it’s more difficult. On EFI, if on low temperature, the fuel spray do with cold start injection.
- Better reaction when the gas pedal pressed because the injection equipment on EFI (Electronic Fuel Injection) is near from combustion chamber. The fuel pressed with bigger pressure than the pressure in intake manifold. So, the air mix can go to combustion chamber faster and the ignition happen faster. On carburetor the distance of carburetor is far. So, the ignition happen slower.
- Compare of air and petrol is always exact. It’s not on carburetor because carburetor has
many speed system.
- On each cylinder, there is an injector. The injection volume controlled from computer. So, the mix on each cylinder is same and the petrol distribution is good.

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Part of Engine : Valve State

Valve state can prevent oil damage by leakage between valve rod and valve companion. The kinds of valve state is:
- Ring, which placed on channel on valve rod. Rod closer seal with defender, prevent the
defender connected directly with oil and valve rod.
- Umbrella seal placed on valve rod. Umbrella seal shape is look like a big umbrella seal.
It placed on the top of rod and move with valve.
- Closer seal / cup seal placed on the top of companion and placed static. Read More..

Part of Engine : Valve Spring

Valve spring made from special steel. Valve spring can operated on high speed. Valve spring is very flexible to make pulsation. Valve spring can make valve go up and down. Valve spring also can return others components from valve mover. Read More..

Part of Engine : Cylinder Head Gasket

Cylinder Head Gasket is a closer seal between cylinder head and cylinder block.
Cylinder Head Gasket use for prevent:
- Gas damage by leakage from combustion chamber.
- Water damage by leakage from water jacket.
- Oil damage by leakage from oil channel.
Cylinder Head Gasket can make the engine more efficient because high pressure and high temperature from ignition. Gasket made from :
- Metal sheet steel or other metal, so closer positive around all open channel
- Asbestos which close with copper, brass, or steel.
Cylinder Head Gasket can also make from other composite materials. Read More..