Important Of Car Wiper

RUBBER WIPER AND SILICON WIPER

At present there are two types of car wiper using a steel frame type and type soft wiper using Silicon rubber.

 

Rubber Wiper

Rubber Wiper

 
- Easy to tear, crack, decayed and stick to the mirror.

 
- Rubber fast hardware is not elastic flexible again to sweep water from windscreen.
- Water drop still left behind when wiping.

 
- Should be changed every 6 months.

 
- Scratch the windshield.

 
- Visually unclear and ambiguous.

 
- Create a noise while wiping.

- Choppy or shaking jitter while wiping.

 

Silicon Wiper

Silicon Wiper

 
- Silicon wiper environmentally friendly more durable than rubber wiper.

- Silicon wiper blade still can be used  and still soft even not changed for a long being.

 
- Silicon wiper will not scratch the windshield because made from soft rubber different from rubber wiper which iron exists in the rubber wiper.

 
- Wiping with a more efficient and more efficient with flat mirror of your car.

 
- It is not easy to tear, crack, rot or attached to the windshield.

 
- Made from “Full Boneless Silicone”, Easy Flex and follow the curvature of the mirror of your car.

 
- More water can sweep well and even.

 
- Less blurry vision than rubber wiper while heavy rain.

 
- Not affected by oil, rain, heat.

 
- More smooth and fluent wiper movement.

- Cost efficient because there is no need to be changed frequently.

Ensure Durable Car Wiper We Shall Do the following tips: -


1. Enforce / wiper blade lifted when parking especially in hot weather.  

    This is because when the wiper is directly placed above the mirror above the reaction  temperature causes the rubber blade is damaged and becomes uneven.

Lifting Wiper Blade

2. Make sure the tank is filled with water glass cleaner and a little dish washing liquid (Wiper fluid) so that when we use the windscreen wiper to wipe smooth and does not damage the blade and mirror of your car.

Wiper Fluid

 


3. Use appropriate windscreen washers. Be sure to use liquid detergent (Wiper fluid) does not affect the surface of the mirror. Often washing glasses usually comes with a waterproof material (water repellent) which helps drive for greater clarity in heavy rain conditions. 

But I understand there is also a kind of liquid detergent (Wiper fluid) containing bleach can react (side effect) with a rubber or silicon wiper blades and cause it to become hard quickly.

Chemical Wiper Fluid

4. Clean the wiper blades as often as possible preferably within a week. Use a damp cloth and wipe from end to end, dirty wiper will usually leave black stains on the cloth. 

Where we continue to use the wipers when it rains, will be recommended for chunks of sand dust embedded in the rubber wiper will damage the surface of the screen and may also damage the rubber wiper.

Wipe With Damp Cloth

Mechanism Of Brake System

BRAKE DISC TYPE

 

Usually used on the front wheels on most cars and all four wheels for some cars.

A disk is mounted to the wheel hub and rotating with tires and wheels.  

When the driver applying brakes, hydraulic pressure from the master cylinder is used to push the friction pad (pad) against the rotor motion and then stop it.

Brake Disk

 

 

Construction Disk @ Dishes
Disc brake has a smooth surface on both sides of the surface. Usually made of cast iron.

There are also made of solid and cooling fins between the brake surface

BRAKE PAD
Brake pads are used to grip the disc while the vehicle is moving. Brake pads are usually made of a mixture of asbestos, soft metal and resin.

Brake Pad

 

Advantages and disadvantages of disk brakes

 

Advantages
No adjustments need to be made on the installation disk brakes Problem 'brake fade' can be reduced Glad to make inspections

Disadvantages
Requiring a high pressure if the unit servo system is damaged

HAND BRAKE

Also called the emergency brake or "parking brake".

It is used when the vehicle has been stopped or abandoned vehicles in the car park.

It aims to ensure that the vehicle will not move and are in a safe condition.

Apart from the handbrake serves as help stop the vehicle if hydraulic system not functioning.  Should not be practiced at all time, just in emergencies only.

Hand Brake

Hand brake consists of three main units: -

1. Unit ratchet 2. The flexible steel cable 3. Unit brake shoe  

Hand brake operation

Mechanically operated hand brake.

 When the lever arm is pulled, the cable will pull brake drum shoe.  

This causes the brake shoe rub and push out the drum surface.

This will cause the wheels are not moving anymore.

 

BRAKE BOOSTER (SERVO)
Brake booster (servo) is used as an aid to the brake master hydraulic cylinder.  Assemble together / master pump and connected directly to the brake pedal.

 Is as a tool for the booster to the brake system provides greater efficiency.

Servo braking is used to enhance the results of the minimal brake pedal pressure.  

The advantages of this type are drivers no need to press the brake pedal firmly to generate high pressure in the brake system .

Operates with the assistance of the power vacuum from the engine.

There are 3 types of brake booster system (servo) that are commonly used are:
1. Vacuum type

Using a vacuum obtained from the intake manifold or using a vacuum pump and connected to the brake booster.

For vehicles with diesel engines usually have a pump type electrically or mechanically to get the vacuum. Electrical vacuum pump is driven by electric motor.  

There is a switch in the brake booster which switches the signal if the level of vacuum pumps is low.

If damaged, will show the signal (glowing lights on the dashboard)

While the vacuum that uses a mechanical type pump controlled by using the belt.

2. Types of wind pressure

Using wind derived from ' air compressor'. Usually used in heavy vehicles, trucks, buses and other
 

3. Hydraulic Type

Usually on small vehicles such as small lorries .The energy usually derived from hydraulic power steering pump.  

Another way hydraulic energy is obtained by using an electric motor hydraulic pump which is typical for the brake booster.

Principle Of Brake Booster  

The diaphragm is placed around the housing, diaphragm dividing the housing into two parts. 

When the brake pedal is released vacuum will exist in both parts of the casing. When the brake pedal is pressed, the air valve will open and allow air around the entrance to the rear of the diaphragm, vacuum control valve closed with the vacuum can be maintained in the housing.
 

Incoming air will push the diaphragm forward. Thus there is a power forward movement and subsequent decline to the master cylinder piston. Little difference was enough to create mobility.

Brake Servo Diaphgram

Construction Vacuum Brake Booster(Single Booster)

It consists of two parts a shell is tied together on the outside.  

Part sheel front contains vacuum check valve. Vacuum will go into the brake booster (power head) through this valve. These valves are intended to keep the vacuum in the brake booster.  

In the event of an interruption to the supply source of vacuum, for example if a stationary engine braking can still work in good conditions (light brake pedal)  

Brake booster can still brake assist braking system 2 to 3 times until the vacuum therein has been exhausted.  

Plate mounted diaphragm with valve rod and valve control.  

Hydraulic push rod and the reaction disc installed separately. Hydraulic push rod is used to push the piston in the master primary pump

Operating Vacuum Brake Booster (Single Diaphragm)  

Vacuum is supplied from the front sheel through check valve.

When the brake pedal is released, the position of the control valve will prevent air from entering the backside sheel.  

Return spring sheel cause diphragm are in the back
When the brake pedal is pressed, the valve rod to move forward. This causes the vacuum valve cover from the back entrance to sheel.  

At the same time control valve allows air to go into a shell around the back. Incoming air pressure will push forward diaphragm while the vacuum is in front sheel will help attract diaphragm forward too.  

Diaphragm movement forward will move the push rod to push the piston in the master cylinder. With the brakes will work.

Brake Servo Mechanism

 

 

ABS – (Anti-locking Brake System)
It uses a sensor mounted on each wheel.  In this system, sensors on each wheel will send a signal to the ECU about the speed of rotation of the wheel.

ABS System

 

When the brake is pressed, the ECU will detect if there is a slow wheel too fast and probably locked.  

ECU will issue a signal to move the valve to reduce pressure soleniod hydraulic brake on the wheel. 

This can stabilize the movement of the wheels from slipping during brake suddenly.

With And Without ABS

 

 

METHODS BLEEDING BRAKE  

 * Hydraulic brake system should be drained if a pipe connection is disconnected or bubble exist.
 

1.  Remove the brake fluid reservoir cap and fill with the recommended brake fluid up to the MAX.  

2. Start to bleed on the cylinder wheel farthest from the master pump and followed to the closest one.
 

3. Clean the bleeder screw on the wheel cylinder / caliper brakes of all impurities. Enter vinyl pipe on bleeder screw and the other end of the container bottle filled with brake fluid.
 

4. Get the help of a friend to press the brake pedal two or three times. With the brake pedal fully depressed, loosen the bleeder screw to release the air in the system.
 

5. Tighten the bleeder screw immediately before the brake pedal has been released
 

6. Let the brake pedal return to the original position with bleeder screws are closed.
 

7. Repeat steps 3 to 5 until no more air bubbles in the vinyl pipe.
 

8. Press and release the brake pedal several times and check for leaks at all connections.