My cars is Love

BRAKE ASSIST ( BA )

2009-03-13T19:05:00.000+07:00

This system can increase brake fluid pressure effectively with lighter pedal pushing force than that of conventional system,when emergency braking. On the braking of unskilled driver,even if pedal pushing speed of both skilled and unskilled drivers are same, unskilled driver cannot apply enough force on the brake pedal until the brake booster functions because the unskilled driver is rather hard to increase the pedal pushing force during braking comparing with that the skilled driver.

In the conventional type of brake booster system has an almost constant boost ratio from small to large pedal pushing force, but brake assist system makes the boost ratio larger when the pedal pushing force exeeds certain level.this is function of brake assist.

On conventional system the valve plunger , which transmits the operating force of operating rod to reaction disc, is one peace part. On brake assist system the valve plunger is divided into two pieces, and there is a rubber damper or a spring for boost ratio control between them.

Primary period
The power piston moves to left direction by booster function introducing atmospheric pressure,and the reaction disc starts to be deformed due to pressure from the power piston. By the pressure the deformed part of reaction disc goes into inside of a plunger plate holder.

Boost ratio increasing period
The deformed part of reaction disc inside of plunger plate holder contacts to plunger plate, and it compresses the control rubber damper of spring .By the compression a reaction force is applied on the reaction disc, and finally the reaction force is applied on output rod as an additional force from input rod.

BRAKE BOOSTER

2009-03-02T19:30:00.001+07:00

FUNCTION

The force with which the driver steps on the brake pedal would not be enough to cause the brakes to operate to stop the vehicle quickly.

The brake booster therefore multiples the driver's pedal effort so that a large braking force is created.the brake booster may be an integrsl part of the master cylinder or fitted separately from it.

The brake booster has a diaphragm that is operated by the difference in pressure between atmospheric pressure and the vacum that is generated inside the engine's intake manifold.

The master is activated jointly by the pedal and the diaphragm to create a large braking force from a minimum of pedal effort.

Should the brake booster start to malfunction for one reason or another,it is designed in such a way that only the bossting power applied to the brakes is lost.The brakes will require additional pedal effort in such a case , but the vehicle can be braked normally without the booster.

On vehicle powered by a diesel engine , negative pressure is generated by a vacum pump because the intake manifold vacuum of a diesel is not sufficiently strong for this.The brake booster is installed between the brake pedal and the master cylinder,and consists of the following part;

Front/rear shell

Power piston ( diaphragm plate and valve body )

Input rod

Poppet seal

Output rod

Reaction disc

When the brake pedal is not depressed

The input rod,power piston and output rod are forced to the right by the diaphragm return spring.the air valve , consisting of the valve plunger and the interior of the poppet seal,closes, allowing no air to enter chamber B.Further, since the vacum seal, consisting of a power and exterior of the poppet seal, is open, chamber A is connected to chamber B through a vent hole provided in the power piston. both chambers contain a vacum due to the vacuum in the intake manifold.

When the brake pedal is depressed

When the brake pedal is depressed, the input rod and poppet seal move to the left( front), the vacum valve closes,and the vent hole connecting chambers A and B is blocked.Futher movement of input rod pushes the valve plunger and forces the air valve to open ,and air enters chambers B through a gap between the input rod and poppet seal.this causes a pressure differential between the two sides of power piston.The force resulting from this difference in pressure overcomes the force of the diaphragm return spring,moving the power piston to the letf ( front).The leftward movementof the power piston actuates the output rod,producing the required hydraulic pressure.

When the brake pedal is released

When the brake pedal is released, the master cylinder spring ,diaphragm return spring and pedal return spring cause the output rod,power pistonand input rod return to their original positions ( same as not depressed). The cause the air valve to close , and the vacum valve to open, so that the air in chamber B is drawn into the intake manifold, restoring the brake booster to its non-operating condition.

BRAKE MASTER ( MASTER CYLINDER)

2009-02-25T19:51:00.006+07:00

The master cylinder converts the motion of the brake pedal into hydraulic pressure.

It consists of the reservoir tank, which contains the bake fluid ,as well as the piston and cylinder, which generate the hydraulic pressure.there are two types of master cylinder. The single master cylinder uses one piston to deliver hydraulic pressure to all four wheel cylinder.the tandem master cylinder uses two piston to deliver hydraulic pressure separately to the wheel cylinder of the front or rear wheels or the right front & left rear and the left front & right rear whells.The tandem type master cylinder is used more commonly than the single type.

The tandem master cylinder has two independent hydraulic lines , If either of the lines fails to function, the other line is still capable of functioning.
The separate systems for the front wheels and rear wheels are explained.
The primary and secondary pistons are installed inside the cylinder ,the secondary piston is supported by return springs in the front and back.The areas where the springs are act as pressure chambers with inlet port and return port for the brake fluid. The reserve tank connected to the inlet port is shared by both brake pipes for front and rear whells.

USED GENUINE BRAKE PAD AND BRAKE SHOE

2009-02-25T18:45:00.003+07:00

Brake pad and shoe are basically made of the same materials.All genuine brake pad and brake shoe are manufactured from compound materials made from glass fiber,metalic fiber,carbon fiber, etc.as well as high quality filter ,binder, friction stabilizer and lubricant. these materials are carefully blended to provide superior characteristicand capability requaired for safe and adequate braking operation and power. advantages of genuine part listed below

The rotor will not suffer from excessive wear.
Braking power remains constant even at high temperatures.
Braking power varies little at different vehicle running speed.
Abrasion remains constant at varying temperatures.
Braking power remains constant even when brakes at wet.
Squeling noise rarely occur.

Inferior quality non-genuine part may result in;

Faster wearing and more frequent replacement,hence high maintenance cost eventually.
Uneven braking.
Unsafe brake fade.
Abrasion to disc or drum.

For safety riding replace the brake pad or brake shoe after the thickness is close to the minimum limit , the limit you know by asked to your dealer. if minimum limit is to used it is very dangerous situation before next periodic maintenance.In that case , It not only takes time and inconvenience for you, but may cost more when completelt worn out pads have damaged rotors.So inspect and correct or replace as necessary the brake pad every 20.000 km.The back side of the pad has a metal clip. when the pad wears to minimum limit , this metal clip rubs against the dasc and makes a scratching noise which serves as a warning. the friction of pad and rotor or brake shoe and brake drum becomes worn it. and if the rotor or drum wears out;

Braking performance become poor.
Vibration will happen ( pedal vibration or judder)
Steering vibration will happen when braking

If the condition happen, measure the thickness as instructed in service manual. Grind when it can be done within specified limit, if not replace with new one.

BRAKE SYSTEM

2009-02-14T17:40:00.004+07:00

The brake as function is to stop vehicle or to decelerate of speed of vehicle and to be parked on a slope, as well brake it extremely importent part in vehicle so it is safety component and very vitally. Brake are expected to be highly realible, as well as durable so that the vehicle can be stopped both safely and promptly in any place and under any conditions.
The part of brake system;

Brake fluid
Brake shoe and Brake pad
Brake rotor and Brake drum
Brake pedal ( foot brake/parking brakea)
Brake pipe line
Brake master

Function of part;

Brake fluid transfer the power to the brake pads and brake shoes via brake line to stop the cars or to reduce of speed ,as well brake fluid necessary maintenance to keep of quality. brake fluid will deteriorate by moist in air mixing with fluid through brake pipe or reservoir tank cap.it also deteroited by oxidation due to the friction heat,if brake fluid deteroites it may cause the corrotion inside the cylinder and if brake fluid contains moist ,the boiling point become lower. As brake fluid is used under severe conditions, vapor lock may easily as aresult of brake fluid boiling. So the brake fluid must be inspect and correct or replace as necessary and maintenance fluid level and leaks. Replacement of brake fluid is recomended every 40,000 km or two years or if brake fluid become very dirty under high humidity.
Brake pad or brake shoe produce a braking force ,brake pad is used in disc brake system . In disc brake system,a disc rotates with the whell,and brake pads clamps this rotating disc to produce a braking force.In brake shoe in used in drum brake system . In a drum brake system brake shoe expand outwards to press the linings against the drum inner surface which is rotating, to produce the braking force.brake pad or brake shoe become worn by friction .if brake pad or shoe worn is continuosly used;

Original brake performance can no longer be guaranteed.
Pad wear indicator will make squeling noise,if completely worn out,brake function will almost be loss,leading to very dangerous situation for passengar.
Worn pad/shoe will cause damage to the brake discs or drums.

Pad wear indicator : When pad thickness approaches the specified limit,small nails riveted to the pad will scratch the rotor surface when the brake are applied, making squealing noise which warns the driver that pads should be replaced.

DRIVE BELT

2008-07-01T18:27:00.005+07:00

Drive belt placed on the crankshaft pulley, the belt deliver crankshaft power to the water pump,cooling fan,alternator,power steering oil pump,air conditioner compressor and vacum pump (diesel engine only).

As the belt are made of rubber, they gradually become worn and harden because of friction with pulley,the heat originated by its friction and elasticity by the engine torque change,and it will finally crack.

Serious trouble may result such as:

If the power steering belt break, the steering will suddenly become extremely heavy.
If fan belt breaks, water pump will not operated and engine will overheat.
If alternator belt breaks,battery will be discharged.
If air conditioner belt breaks, air conditioner will not operate ( HOT).
If vacum pump belt breaks (diesel engines) the brake pedalwill suddenly become stiff,making it extremely hard to applay brakes.

Inspect and correct or replace as necessary every 20,000km/12 months after 1st maintenance,whichever comes first for without three way catalyst model. For model with three way catalyst every 40,000km/ 24 months.

MAINTENACE

Inspect for cracks, fraying,wear or oil adhesion. If necassary, replace witht a new one.
Inspect the belt deflections by pushing on the belt midway between pulleys with a force of 98N ( 10 kg.22lb ).
Adjust if belt deflections is too small or too large. Specified deflection limit is shown in Service Manual.

Genuine belts are made of proper materials to form precise stucture and configuration matching each vehicle and engine type. They are of appropriate length so as to permit sufficient for tension adjusment.These characteristics are essential for a long service life.

The factory-fitted thermal-contraction belt are low-maintenance products.If the belt tension decreases, the belt starts slipping and produces heat which makes the inside cords shrink, thus recovering the tension.

Does any problem happen if belt tension is too high or too low?

Yes, you will have problem either case.

If tension is weak, belt will slip against the pulley,and power transfer will become lower.this means,in case of fan belt,cooling power will decrease and in case of alternator belt,generating power will decrease and battery charge level will decrease. This can be easily niticed as sharp squeaking noise will be generated when racing engine.

On the other hand,excessive tension leads to short life of alternator bearing,water pump bearing or crankshaft main bearing.

Belts used for a vehicle are all same?

Belts look the same,however ,length and width are slighly different.

For example,you can not use air conditioner belt in place of fan belt.

FUEL FILTER

2008-06-20T17:29:00.008+07:00

The fuel filter (or stainer) prevents the fuel pump and injectors from developing troubles and clogging by removing contaminations such as dust and steel particles as well as water in the fuel, to maintain the engine in an optimum operating condition. it also prevent abrasion insida cylinders,particularly in the upper sections.
The petrol in the fuel tank can contain a considerable amount of dirt and water which ,if passed through the carburetor and injectors,will clog and cause the engine to malfunction.
In diesel engines, too,dirt or moist can get mixed into the diesel fuel.If this dirt or moisture passes through to the injection pump or injection nozzles,it could cause clogging ,wear or seizure of precision part.
The fuel filter separates the contaminations from the fuel and prevents the above-mentioned problems.
However,if contaminations accumulate in the fuel filter,it becomes clogged and limits the fuel supply amount.

Maintenance

For petrol engine replace every 40,000km/24 months whichever comers first.
For diesel engine check filter and drain water every 10,000km/6 months and replace every 40,000km /2 months ,whichever comes first.
Replacement interval must be shortened in the area where proper quality fuel is not always available.
Under severe condition like dusty condition or weather conditions are extremely severe ,replace every 20,000km/12 months,whichever comes first.

IGNITION SYSTEM

2008-06-01T16:07:00.002+07:00

FUNCTION

Spark plug transmits an extremely high voltage across the electrodes to produce sparks, which ignite and explode the air-fuel mixture compressed in cylinders of a petrol engine.

Necessity of maintenance / What happens if not done

With use ,the spark plug electrodes experiance a gradual erotion and widening of the gap between them, making spark generation difficult. At the same time , combution deposits on the insulator tip and the electrodes cause short circuit of the current, resulting in sparks between impropper portions.

If the plugs are worn, the engine performance will decrease and fuel economy will become worse.

If the ignition timing is advanceed too much , or retarded too much,it will cause the engine's power decrease.

Maintenance Interval

Spark plug ( conventional type )

Inspect and correct or replace as necessary every 10,000km /6 months and replace every 20,000km /12 months ,whichever comes first.(When using leaded petrol , it is recomendable to replace spark plug earlier( to a half or a third) than the one using unleaded petrol.)

Spark plug ( Platinum- tipped type )

Replace every 100,000 km

Ignition wires

Inspect and correct or replace as necessary every 40,000km / 24 months, whichever comes first.

Ignition timing

For emission-controlled engine , adjust the timing every 20,000km / 24 months, whichever comes first.
For non emission-controlled engine , adjust the timing every 10,000km / 6 months, whichever comes first.
In the case of some latest engine , ignition timing adjustmentis not necessary.

Maintenance job

Clean the plug with wire brush and check for damage or cracks ( for platinum type or Iridium type do not clean )
Check plug gap with plug gap gauge (Only conventional type )
Inspect wire for cracks, damage,burned terminals and for improper fit.
Measure the resistance of wires and check for intermitent breaks.
Check ignition timing and adjust as necessary.

TIMING BELT

2008-06-01T15:41:00.002+07:00

FUNCTION

Timing belts transmit drive power to the camshaft(s) from the rotating crankshaft thus enabling the intake and exhaust to open and close in accordance with the valve timing pattern specified for each type of engine.

Necessity of maintenance /What happen if not done

The timing belt gradually becomes worn, hard or slack as it is used ,and it will finally jump over the sprocket teeth, and in the worst case , break.
If timing belt jumps over the sprocket teeth;

Engine power will decrease
Fuel consumption becomes worse

If belt tension becomes too low;

Belt vibration noise will be notified

If timing belt breaks;

Intake /exhaust valves and pistons will crash with each other and will be damaged

Maintenance Interval

Replace every 100,000km or sooner, depending on usage conditions.(There is no need of replacements for timing chains, which are basically maintenance free)

AIR CLEANER FILTER

2008-06-01T14:47:00.002+07:00

FUNCTION

The air taken in by engine contains dust and other particles. The air filter traps dust and dirty particles in the air with its filter, preventing them from entering the cylinders.

There two types of air filter element

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This type used oil-permeated filter paper. As the paper sticky, dust and other particles in the air adhere to the paper as air passes through it. This type has much bigger filtering capacity than dry paper type filter of the same size.

This type is appropriate for the desert area.

Necessity of Maintenance/ What happen if not done

The filter becomes clogged with dirty and the air flow will be restricted.

If dust or other particle enter the cylinder or the air floe is restricted due to the clog;

Engine cylinder will wear rapidly.
Fuel economy will become worse because of improper combustion of air-fuel mixute.
Engine performance will become worse ( poor engine power or poor acceleration ,etc.)
Exhaust gas emission becomes worse.
Black smoke will increase (diesel engine)

Maintenance Interval

Replace every 40,000km /24 months ,whicever comes first.

For dry paper typr, clen every 10,000 /6 months ,whichever comes first.

Driving under dusty conditions, they should be replaced(viscous type) or cleaned ( dry type) more frequently.

ENGINE OIL FILTER

2008-06-01T14:22:00.002+07:00

FUNCTION / MECHANISM

The oil filter removes harmful contaminations from the engine oil which lubricated areas of engine interior subjected to friction.

The oil filter has a drain-back prevention valve to inhibit the oil in the filter and oilpassage to flow back to oil pan when the engine is tuned off. This function is to supply oil to all the friction surfaces inside the engine as soon as it is started;and thus, prevents wear which otherwise would be caused by lack of the oil film at metal to metal contack portions.

Necessity of Maintenance / What happens if not done

Engine oil will become dirty due to the carbon , metal particels or dust etc. Such contaminations accumulated in the filter , the filte's filtration capacity will drop.

If dirty engine oil filter is continuosly used;

Engine oil will quickly become dirty.
Engine will be damaged because of contaminated oil.

Maintenance Interval

Replace every 10,000km /6 months, whichever comes first. It is desirable that the oil filter is changed every time the oil is changed because about 0.5liters of used oil would remain in the filter if it werw not replaced. This would accelerate deterioration of the new oil.

ENGINE OIL

2008-05-30T23:06:00.002+07:00

FUNGTION / MECHANISM

Engine oil has the following functions;

Reduces Wear and friction in the pistons, bearing and other moving part.
Cleans inside of the engine.
Prevents the corrotion of metal part and cushions moving parts, as well as absorbing noxious substances from engine combustion.
Cooling the engine . Absorbs heat from some engine components where heat spot occurs.
Seal the high-temperature, high-pressure gas in the combustion chambers,as well as transferring heat from high temperature areas to the oil pan,where it is dissipated into the air.

Necessary of Maintenance /What happent if not done

Oil will lose its effectiveness by carbon or metal particles, and viscosity will decrease with use by oxidation.

If deterioted oil is continuosly used ,followings may happen;

Engine friction portions wear out quickly
Engine will be damage by corrotion
Engine will overheat
Fuel economy become worse
Engine power will be decreased
Engine seizure happens inthe worst case

Maintenance Interval

Replace every 10,000km /6 months , whichever comes first.

Driving under severe condition like dusty condition, repeated short distance driving, towing a trailer/caravan or extensive idling, it should be replaced more frequently

For petrol engine with turbocharger and most of diesel engines, replaceevery 5,000km/3 months, whichever comes first.

Is engine oil different between petrol engine and diesel engine ?

There are exclusive type and universal type.

Engine oil is different depending on the type of engine. for example, if oil specification is SJ or SH which starts from S ( Sparrk ignition engine ) it is for petrol engine only.
If oil specification is CD or CC , it is only for diesel engine. However , there is universal oil whose specification is SE - CC for example.

What is the difference betwen mineral base oil and synthetic base oil ?

Targeted usage and cost

There are two types of engine oil depending on the material contained, mineral type and synthetic type. Synthetic type is usually used for racing asit has good heat resistance ,however , it is very expensive. for normal use, itis recommended to use mineral type oil because of its cost performance.Never extend replacement interval incase syntetic oil is used, as its improved cleaning performance means the oil becomes dirty quickly.

COOLING SYSTEM

2008-05-30T22:18:00.002+07:00

Necessity of Maintenance /What happens if not done

The radiator hoses and heater hoses where engine coolant flows are made of rubber. The gradually become hard and finally ,crack which makes coolant leak out.
If the coolant level drops , the engine may overheat , so it necessary to check the cooling and heater system hoses periodically.

Maintenance Interval

Inspect and correct or replace as necessary every 20,000km /12 months whichever comes first.

Maintenance JOB

Check rubber hoses for improper attachment for leaks, crack, damage, loose conection, chafing and deterioration.
Check radiator cap relief pressure with cap tester.
Check cooling system for leaks by applaying pressure with cap tester.
Check all hose clamp for proper instalation

ENGINE COOLANT

Function /Mechanism

Engine coolant is necessary for cooling the engine and an ethylene glycol anti-freeze is required to be added in soft water with the proper mixture because the engine coolant has the following functions;

Anti - freeze
Anti - corrotion
Raise coolant boiling point

Necessity of maintenance /what happens ifnot done

Engine coolant deteriorates due to heat and chemical changes over time.

The color will change from bright color to dark color with use.

If deteriorated engine coolant is continuosly used

Engine will overheat
Coolant will freeze when it is cold and cause trouble to radiator and engine
Coolant will leak from radiator because of perforation caused by corrotion.

Maintenance Interval and job

Replace every 40,000km /24 months, whichever comes first.
Change as instructed in Dealer.

Battery Mobil

2008-05-27T19:05:00.002+07:00

Battery merupakan komponen dalam kendaraan yang sangat penting tetutama untuk kendaraan yang memakai bahan bakar minyak jenis " BENSIN " . Battery menjadi komponen yang sangat penting dikarenakan untuk menghidupkan mobil , motor penggerak start membutuhkan suplai arus dari battery . Lebih penting lagi apabila kendaraan mobil kita mengunakan Trasmisi Otomatis dikarenakan mobil tidak dapat dihidupkan dengan cara lain kecuali dengan Elektrik Stater. Disinilah peran utama Battery pada mobil.

Merawat battery pada kendaraan pada dasarnya cukup mudah yaitu dengan cara :

Menjaga Level air accu pada garis dibawah UPPER dan diatas garis LOWER
Tambahkan bila berada pada level dibawah LOWER
Periksa berat jenis air accu bila diperlukan ( lakukan di bengkel langgana anda )
Jaga kebersihan terminal battery .

PERSIAPAN PERGANTIAN BATTERY

Setelah kita menerima battery berikut dengan air accu ( H2SO4 ) maka hal pertama adalah memeriksa apakah battery masih tersegel dengan baik . Bila OK maka kita dapat lanjutkan proses pergantian battery pada kendaraan . Buka penutup sel battery yang terbuat dari lapisan alumunium lalu isikan air accu hingga mencapai batas ' UPPER ' apabila level turun tambahkan hingga mencapai level UPPER. Setelah selesai seluruhnya tutup setiap sel tersebut dengan tutup yang telah disediakan . Berhati -hatilah ketika mengisi cairan air accu tersebut bila terkena kulit basuh bagian tersebut dengan menggunakan air bersih.

HAL PENTING YANG HARUS DIHINDARI SAAT MERAWAT BATTERY

Tidak boleh test battery saat sedang charge
Hati -hati jangan menghubungkan beban secara langsungkarena dapat menimbulkan percikan api ,yang dapat menyebabkan battery meledak
Jangan sampai menyumbat lubang vent plug
Jaga battery dari percikan api

MENJAGA MOBIL

2008-05-25T15:39:00.003+07:00

Menjaga mobil adalah suatu keharusan yang wajib dilakukan oleh setiap pemilik kendaraan , karena dengan terpeliharanya kendaraan maka akan terwujud suatu kenyamanan dan keselamatan dalam berkendara . Menjaga kendaraan disini adalah bukan hanya melindungi kendaraan dari ancaman pihak luar ( pencuri ) tetapi lebih kepada bagaimana kendaraan kita dapat bekerja lebih optimal. Bukankah mobil sudah dilakukan perawatan berkala sesuai anjuran Dealer Resmi ?

Tepat sekali pernyataan diatas , namun anda sebagai owner wajib mengetahui bagian- bagian dari komponen kendaraan anda. Setidaknya komponen yang sangat sederhana dalam hal perawatan karena dealer anda melakukan perawatan hanya dalam periode tertentu . Sedangkan mobil anda bergerak setiap saat yang mana pasti akan terjadi perubahan . Perubahan inilah yang wajib diketahui oleh anda sebagai user ataupun owner dari kendaraan tersebut.

Komponen manakah yang wajib diketahui oleh anda agar mobil anda dapat bekerja optimal?

Battery /Aki
Level Oli
Air Radiator
Tekanan Ban
Instrumen Panel

Contoh daftar diatas adalah komponen yang harus selalu diperhatikan agar performa kendaraan menjadi optimal yang mana hal-hal diatas tidaklah memerlukan keahlian khusus. Karena tidak sedikit dari anda yang tidak memperdulikan hal ringan diatas tetapi sering kali diabaikan yang berakibat sangat fatal bagi mobil anda.

Postingan pertama

2008-04-15T19:25:00.000+07:00

Hello world...

Senang sekali rasanya dapat memiliki satu media yang dapat digunakan untuk mengungkapkan sedikit ilmu yang mungkin dapat bermanfaat bagi diri pribadi dan orang lain.
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Silahkan meninggalkan komentar ,apapun itu, demi kenyamanan dan manfaat yang bisa anda temukan.

Terima kasih.