2013年8月2日星期五
Automobile brake pad type
1, Asbestos brake lining, the oldest and one of the most widely used, type of asbestos brake lining composition proportion, asbestos accounted for 40-60%, but the asbestos has been confirmed by the medical profession is a carcinogen, has potential harm to human body.
2, type of brake pad, semimetal mixture type semimetal mixture is a rough steel wool pads as a mixture of reinforcing fibers and important.
3, non asbestos organic matter type brake pads of non-asbestos organic brake pad material is asbestos substitute, used for brake drum and brake shoe.
From several points above is mainly on material.
2013年6月7日星期五
The application of brake rotor in China
The application of disc brakes in
the car, due to the restrictions on the size of the shape of the wheel
hub, in small car hydraulic disc brake is used in great quantities, and
heavy vehicle is using a pneumatic disc brake. With the development of
automobile industry technology in China, especially the development of
car industry, the phenomenon of using disc brakes on the car will be
gradually into a scale. Especially in improving the vehicle performance,
safety, comfort, and meet the demand of people constantly improve the
living material, improve the living environment plays a major role.
4.1 minivans, cars, light trucks and other vehicles
Sedan in the braking process, due to inertia effect, the front wheel load often account for 70% of the motor full load – 80%, so the front wheel braking force is bigger than the rear wheels. Manufacturer from the perspective of economic and practical, in order to save costs, many used the front disc brake, the rear drum brake mixed matching method. Adopts front coil HouGu type hybrid brake is also because the vehicle during emergency braking, axle weight forward, higher requirement on the front wheel braking performance, brake before this class mainly hydraulic disc brake for the mainstream, with hydraulic oil as a transmission medium, with total hydraulic pump as power, after the brake pump with hydraulic points double-acting cylinder brake shoe to match. At present most of the cars, minivans, light trucks, suvs and pickups are using front coil HouGu mixed type brake. But with the improvement of highway grade, ride quality rise, especially the national security law enforcement, used disc brakes front and rear wheels will be an inevitable trend of the development of.
4.2 large passenger cars
Disc brake products, technology advanced, reliability, overall good, innovative and integration of technical standards. The European and American countries since the early 1990 s the disc brake for large buses. To 2000, the disc brake (both front and rear brake disc) has become the standard of European and American countries city bus configuration. Since 1997 in our country on the bus and truck promotion disc brakes and ABS anti-lock braking system, but the price is too high for imported products, mainly used in high-end products. Force 2004, the ministry of communications over 9 m high Ⅱ type passenger cars on the “must” after equipped with disc brakes to be popular. Such as Beijing, Shanghai, guangzhou, shenzhen, wuhan, the bus company are using matching for coach in pneumatic disc brake. At present domestic well-known large manufacturers have been in mass production grade passenger with disc brakes.
4.3 heavy duty truck
As a heavy duty truck industry applied new technology, disc brake is already a mature product. Large domestic car factory are finished in the early period of the disc brake in heavy duty truck type test and technical reserves, the disc brake can become the future heavy card in some ways the new trend in the development of brake system matching.
5. The domestic development trend of automotive disc brake
Europe, America, Japan and other developed countries have disc brakes as standard equipment in cars, buses, medium, and heavy multistage other cars. Along with the national laws and regulations, such as GB 7258-2004 “motor vehicle safety technical conditions” (to be released based on the 2004 version of the updated version) and GB 24407-2012 “special school bus safety technical conditions”, is expected in the next few years, disc brakes at home will get rapid promotion and application. According to the new GB 7258, dangerous goods transport vehicle front axle and conductor is more than 9 m of bus front axle should be equipped with disc brake; The new GB 24407 requirements: dedicated school bus front wheel should install the school bus brake discs. Modern car disc brake problems should pay attention to the development of research and mainly increase the efficiency of the brake’s braking, prevent dust pollution and corrosion structure and reduce cost, weight, Jane, the development of the electronic alarm and intelligent system, practical stronger and longer life.
4.1 minivans, cars, light trucks and other vehicles
Sedan in the braking process, due to inertia effect, the front wheel load often account for 70% of the motor full load – 80%, so the front wheel braking force is bigger than the rear wheels. Manufacturer from the perspective of economic and practical, in order to save costs, many used the front disc brake, the rear drum brake mixed matching method. Adopts front coil HouGu type hybrid brake is also because the vehicle during emergency braking, axle weight forward, higher requirement on the front wheel braking performance, brake before this class mainly hydraulic disc brake for the mainstream, with hydraulic oil as a transmission medium, with total hydraulic pump as power, after the brake pump with hydraulic points double-acting cylinder brake shoe to match. At present most of the cars, minivans, light trucks, suvs and pickups are using front coil HouGu mixed type brake. But with the improvement of highway grade, ride quality rise, especially the national security law enforcement, used disc brakes front and rear wheels will be an inevitable trend of the development of.
4.2 large passenger cars
Disc brake products, technology advanced, reliability, overall good, innovative and integration of technical standards. The European and American countries since the early 1990 s the disc brake for large buses. To 2000, the disc brake (both front and rear brake disc) has become the standard of European and American countries city bus configuration. Since 1997 in our country on the bus and truck promotion disc brakes and ABS anti-lock braking system, but the price is too high for imported products, mainly used in high-end products. Force 2004, the ministry of communications over 9 m high Ⅱ type passenger cars on the “must” after equipped with disc brakes to be popular. Such as Beijing, Shanghai, guangzhou, shenzhen, wuhan, the bus company are using matching for coach in pneumatic disc brake. At present domestic well-known large manufacturers have been in mass production grade passenger with disc brakes.
4.3 heavy duty truck
As a heavy duty truck industry applied new technology, disc brake is already a mature product. Large domestic car factory are finished in the early period of the disc brake in heavy duty truck type test and technical reserves, the disc brake can become the future heavy card in some ways the new trend in the development of brake system matching.
5. The domestic development trend of automotive disc brake
Europe, America, Japan and other developed countries have disc brakes as standard equipment in cars, buses, medium, and heavy multistage other cars. Along with the national laws and regulations, such as GB 7258-2004 “motor vehicle safety technical conditions” (to be released based on the 2004 version of the updated version) and GB 24407-2012 “special school bus safety technical conditions”, is expected in the next few years, disc brakes at home will get rapid promotion and application. According to the new GB 7258, dangerous goods transport vehicle front axle and conductor is more than 9 m of bus front axle should be equipped with disc brake; The new GB 24407 requirements: dedicated school bus front wheel should install the school bus brake discs. Modern car disc brake problems should pay attention to the development of research and mainly increase the efficiency of the brake’s braking, prevent dust pollution and corrosion structure and reduce cost, weight, Jane, the development of the electronic alarm and intelligent system, practical stronger and longer life.
2013年5月18日星期六
How to recover the rust?
Auto brake is generally made by cast iron, so the car stops or stock
for a period of time will gradually rust, this is normal, not a brake
disc quality. If a smaller range of rust on the brake disc, you can not
deal specifically with the small amount of rust on the brake disc when
the vehicle is in motion brake is removed. If the rust is more serious,
the vehicle will brake vibration or jitter, such as the vibration of the
brake pads, steering wheel vibration or jitter, body vibration. Serious
corrosion Brake removal is difficult to pass, even if rust is removed
because of the uneven thickness of the brake discs may cause the brake vibration. Therefore every two months against disc brake once maintained, in order to avoid corrosion of the brake disc too serious.
How to recover the rust of brake disc?
First, find a safe level sections, we must ensure the safety! Then normal driving a vehicle on the road, and the normal use of the brakes. By reference to the following example repeated braking times. (Note: For hybrid vehicles or electric vehicles vehicles, the shift lever in the N position when braking.)
1, according to the deceleration of 0.3G braking from 60 MPH to 0 mph (96km / h to 0 km / h), repeated five times (during braking, the vehicle about 10 seconds with about 120 meters.)
2, in accordance with 0.3G deceleration braking (braking, the vehicle about 6 seconds with about 55 meters from 40 mph to 0 mph (64km / h to 0 km / h), repeated 10 times.)
3, in accordance with 0.3G deceleration braking (braking, the vehicle about 5 seconds with about 30 meters from 30 MPH to 0 mph (48km / h to 0 km / h), repeated 20 times.)
4, in accordance with 0.3G deceleration braking from 60 MPH to 40 mph (96km / h to 64km / h), repeated 10 times (during braking, the vehicle about 3 seconds with about 70 meters.)
Deceleration of 0.3G braking from 40 mph to 20 mph (64km / h to 32km / h), repeated 15 times (during braking, the vehicle traveling about 40 meters in about 3 seconds.)
The brake vibration of how to deal with
Vehicle maintenance brake disc persists brake vibration, the vehicle shall be open to the repair shop overhaul. The repair shop should first find out the cause vibration of the brake disc and in accordance with reasonable maintenance. If the cause of the vibration of the brake disc thickness is uneven, to be grinding brakes. If the grinding not solve the problem, you may need to replace the brake discs and brake pads.
How to recover the rust of brake disc?
First, find a safe level sections, we must ensure the safety! Then normal driving a vehicle on the road, and the normal use of the brakes. By reference to the following example repeated braking times. (Note: For hybrid vehicles or electric vehicles vehicles, the shift lever in the N position when braking.)
1, according to the deceleration of 0.3G braking from 60 MPH to 0 mph (96km / h to 0 km / h), repeated five times (during braking, the vehicle about 10 seconds with about 120 meters.)
2, in accordance with 0.3G deceleration braking (braking, the vehicle about 6 seconds with about 55 meters from 40 mph to 0 mph (64km / h to 0 km / h), repeated 10 times.)
3, in accordance with 0.3G deceleration braking (braking, the vehicle about 5 seconds with about 30 meters from 30 MPH to 0 mph (48km / h to 0 km / h), repeated 20 times.)
4, in accordance with 0.3G deceleration braking from 60 MPH to 40 mph (96km / h to 64km / h), repeated 10 times (during braking, the vehicle about 3 seconds with about 70 meters.)
Deceleration of 0.3G braking from 40 mph to 20 mph (64km / h to 32km / h), repeated 15 times (during braking, the vehicle traveling about 40 meters in about 3 seconds.)
The brake vibration of how to deal with
Vehicle maintenance brake disc persists brake vibration, the vehicle shall be open to the repair shop overhaul. The repair shop should first find out the cause vibration of the brake disc and in accordance with reasonable maintenance. If the cause of the vibration of the brake disc thickness is uneven, to be grinding brakes. If the grinding not solve the problem, you may need to replace the brake discs and brake pads.
2013年5月8日星期三
How to surface treatments for Brake Rotor
Zinc-Plating: Zinc plating is a chemical process
that is applied onto most rotors to prevent rotors from rusting. This
chemical plating process is usually available in black zinc, gold zinc,
or silver zinc. Although the entire rotors is zinc plated, the zinc
will only remain on areas that do not come into contact with the brake
pads.
Each Performance Brake Rotor is immersed in different solution tanks in the coating process. The final result is a thick protective coating that will help prevent rusting and give you a great custom look.
When you receive your Rotors they will be completely Black or Silver. As soon as you install them and start braking, the friction from the pads will wipe the zinc from the pad surface turning it Silver leaving the holes, slots and the rest of the brake Rotor Zinc coated in the color you selected. (See before and after photos below) The Zinc coating that is removed from the Pad surface quickly dissipates and will not gum up the pad surface or affect the braking performance in any way.
Each Performance Brake Rotor is immersed in different solution tanks in the coating process. The final result is a thick protective coating that will help prevent rusting and give you a great custom look.
When you receive your Rotors they will be completely Black or Silver. As soon as you install them and start braking, the friction from the pads will wipe the zinc from the pad surface turning it Silver leaving the holes, slots and the rest of the brake Rotor Zinc coated in the color you selected. (See before and after photos below) The Zinc coating that is removed from the Pad surface quickly dissipates and will not gum up the pad surface or affect the braking performance in any way.
2012年12月14日星期五
New composite brake disc
Almost brake discs are made by cast iron. Recently,a lot of racing and other high performance vehicles have been equipped with composite design brake disc.
This design in the surface of the brake disc using the hybrid composite
(carbon fiber – ceramic), while the remaining part of the use of
aluminum or cast.
The Brembo launched a new brake disc: the complex cast floating brake discs made of cast iron and aluminum. The new brake disc has a lot of advantages: lighter weight (15-20%) reduced the driving comfort higher, better corrosion resistance, abrasion resistance and higher braking performance.
Complex casting floating brake discs optimize brake system performance SUV from the most basic to the sporty the strongest sports cars and commercial vehicles vehicles.
Complex cast floating brake disc with a cast iron braking surface and aluminum caps Ministry, this design is ideally combines the lightweight characteristics of heat resistance advantages of cast iron and aluminum. Innovative technology so that one member can be manufactured using two materials, in working condition, the brake disc as an integral member at a low temperature effective operation, while at high temperatures, maximum performance, and deformation may occur, then the system dynamic disk will be run as a floating part.
Cast brake discs lighter complex to meet the demand for lightweight braking system, brake response limit work state, allowing a more sensitive and has better performance of high-temperature fatigue resistance. Therefore, the probability of instantaneous thermal deformation and permanent thermal deformation event, appears will be significantly reduced. The the instantaneous deformation events usually occur when the brake pedal is depressed, the brake disc may have a fever, however, the the permanent brake rotor deformation is the main reason for the vibrations of the vehicle during braking.
The cast iron has the best thermal performance, the degree of deformation is low, and good thermal conduction properties, while having good technological properties, such as castability and high machining performance. It also has many other advantages, such as good damping performance. On the other hand, aluminum has the advantages of light weight, the density is only cast iron 2? Times, so that, depending on the application of complex casting the brakes disc than one brake disc light 15-20%.
This is a major step forward, because taking into account the weight reduction will significantly improve ride comfort and driving accuracy, even if the vehicle weight reduced to 1 kg car manufacturers also have extraordinary significance in the removal of “non- hanging “especially after the weight.
Unlike integral braking disc complex casting the brake disc has a symmetrical braking surface, in the embodiment during braking disc surface temperature distribution is more uniform, which means release the residual degree of deformation of the brake after a significantly lower (70% reduction) . In addition, the complex casting design means that the brake ring, having the characteristics of the natural materials free expansion under heat. This effectively improves the performance of the floating disk. But the floating components do not need too many parts.
Given two complex casting material has many excellent characteristics, this performance brake disc successfully reduces the material of the brake disc in the brake is released and the brake pad wear.
.
The Brembo launched a new brake disc: the complex cast floating brake discs made of cast iron and aluminum. The new brake disc has a lot of advantages: lighter weight (15-20%) reduced the driving comfort higher, better corrosion resistance, abrasion resistance and higher braking performance.
Complex casting floating brake discs optimize brake system performance SUV from the most basic to the sporty the strongest sports cars and commercial vehicles vehicles.
Complex cast floating brake disc with a cast iron braking surface and aluminum caps Ministry, this design is ideally combines the lightweight characteristics of heat resistance advantages of cast iron and aluminum. Innovative technology so that one member can be manufactured using two materials, in working condition, the brake disc as an integral member at a low temperature effective operation, while at high temperatures, maximum performance, and deformation may occur, then the system dynamic disk will be run as a floating part.
Cast brake discs lighter complex to meet the demand for lightweight braking system, brake response limit work state, allowing a more sensitive and has better performance of high-temperature fatigue resistance. Therefore, the probability of instantaneous thermal deformation and permanent thermal deformation event, appears will be significantly reduced. The the instantaneous deformation events usually occur when the brake pedal is depressed, the brake disc may have a fever, however, the the permanent brake rotor deformation is the main reason for the vibrations of the vehicle during braking.
The cast iron has the best thermal performance, the degree of deformation is low, and good thermal conduction properties, while having good technological properties, such as castability and high machining performance. It also has many other advantages, such as good damping performance. On the other hand, aluminum has the advantages of light weight, the density is only cast iron 2? Times, so that, depending on the application of complex casting the brakes disc than one brake disc light 15-20%.
This is a major step forward, because taking into account the weight reduction will significantly improve ride comfort and driving accuracy, even if the vehicle weight reduced to 1 kg car manufacturers also have extraordinary significance in the removal of “non- hanging “especially after the weight.
Unlike integral braking disc complex casting the brake disc has a symmetrical braking surface, in the embodiment during braking disc surface temperature distribution is more uniform, which means release the residual degree of deformation of the brake after a significantly lower (70% reduction) . In addition, the complex casting design means that the brake ring, having the characteristics of the natural materials free expansion under heat. This effectively improves the performance of the floating disk. But the floating components do not need too many parts.
Given two complex casting material has many excellent characteristics, this performance brake disc successfully reduces the material of the brake disc in the brake is released and the brake pad wear.
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