Safety is the most important bad brake oil can cause brake failure


Everyone who drives knows that when we step on the brakes to stop, we must have something to transfer the pressure to finish. This kind of thing is a kind of liquid, called brake fluid, also called brake fluid. It is directly related to Because of the safety of the vehicle and the safety of the people, the brake oil in human life is called "safety guard" in the automotive industry. However, the reporter recently learned that the current domestic brake fluid market has violated the counterfeit products of counterfeit goods and caused a safety accident for consumers. According to a few days ago, relevant experts of the China Standards Association disclosed that China’s auto market consumes about 30,000 tons of brake oil each year, of which more than 80% belong to low-grade, low-quality products. Last year, there were a total of 450,000 road accidents in China, and nearly 100,000 people died, among which 30% were Braking oil caused by failure of the brakes is called "safeguards" brake oil to become "road killer"!

?Typical Case

Poor brake fluid fractured his spine

Mr. Sun is a man from Jiulongpo District, Chongqing City. He drives a small truck to help people pull goods to maintain the family's livelihood. However, on the fourth day of the first lunar month last year, an unexpected car accident changed the life of Mr. Sun. Because of the failure of the brakes, Mr. Sun suffered a fractured spine. He has been recuperating at home so far, spending only 40,000 yuan on medical expenses.

When Mr. Sun was about to brake, he suddenly felt that he was stepping on his feet and he stepped hard. However, he did not stop the car with a few steps. In that very critical moment, for the safety of others, he only slammed into a bumper and forcibly stopped the car, but he was ejected from the car...

After inspection by experts, the main cause of accidents was the poor oil quality of the brake oil, which caused the pump rust and oil leakage, so the brakes failed.

The harm of general bad brake oil is not easy to find in a short period of time, so the concealment is very strong and the hazard is even more serious.

One question

Why bad brake oil brake failure?

The relevant experts who participated in the drafting of the National Standard for Motor Vehicle Brake Fluid told the reporter that if it is a poor brake fluid, its high temperature resistance will not work. At this time, air resistance will occur, that is, it will become vaporized. When vaporized at high temperature, a bubble forms in the brake system's pipeline, which hinders the flow of brake fluid. The pressure is insufficient, because the gas, that is, the compression factor is much larger than the liquid, in this case the next brake. If you step on it, it is very likely that you will not be able to brake. A brake fluid engineer told the reporter that the temperature of the braking system would rise rapidly on mountain roads and high-speed roads or when driving under continuous high-temperature conditions, and the temperature of the braking system would rise rapidly. The situation of reaching 200°C is often visible. Therefore, China is formulating brake fluid. At the time of the standard, reference was made to international practice and it was stipulated that the boiling point must not be lower than 205°C. Another important technical requirement for brake fluid is kinematic viscosity, which is the fluidity of the brake fluid at low temperatures. When two different brake fluids are placed in a low-temperature bath at minus 40°C, after 12 minutes, the qualified brake oil can still flow normally, and the poor brake fluid is frozen.

What kind of consequences will result from freezing? The brake system is completely solidified, and the brake fluid does not solidify due to the solidification of the brake fluid. After the step, the brakes are basically unable to move. Because the icing volume expands and then detonates the braked pipe, the braked line has more serious consequences. According to experts, many inferior brake oils are made by mixing methanol or mixed alcohol with water. These two kinds of raw materials are not only very corrosive to metals, but also cause the hoses and skins of brake systems to swell and fall off. , causing brake fluid to leak and the brake system to malfunction.

Two questions

What is the blending of inferior brake fluid?

An industry source disclosed to reporters: The production process of low-quality brake oil is very simple, generally made of methanol, which is a blend of industrial alcohol. In many small black workshops, workers can use a single-cylinder washing machine to easily blend, and even more water is used. Make brake fluid and then dip the bottle caps into the real brake fluid. When the consumer buys, the merchant will unscrew the cap to let you smell it to prove that this kind of water brake oil is true.

China's national mandatory standards stipulate that the boiling point of brake oil must not be lower than 205°C, and the freezing point must reach minus 40°C. At present, the basic raw materials for qualified brake fluids in China come from petroleum processing products: polyethylene glycol ether and its borate esters. The common feature of these two raw materials is that they are both high temperature resistant and cold resistant. The boiling point of methanol is only 64.9°C. After mixing with water, the boiling point of the produced brake oil is usually 80°C, which is far from the national standard requirement. In addition, the main raw materials of inferior brake oil, methanol and mixed alcohol, not only have strong corrosiveness to the metal, but also cause excessive Expansion of the brake system's hoses and cups, causing the brake fluid to leak and the brake system to malfunction.

Three questions

Can different brands of brake fluid be mixed?

From a certain point of view, good or bad brake oil is like a two-way switch between life and death. If poor-quality brake oil flows into the market unknowingly, the brake oil, which was originally called “safety guard”, will turn into an instant. "The road killer", so how to better manage it is the problem we must face and solve. In addition, some consumers have a misunderstanding when choosing brake oil. They think that different brand products can be mixed if they are of the same grade. In fact, different brands of qualified brake fluids, although their chemical properties, high temperature and low temperature performance are compatible, but there are some differences in the ingredients, there will be some tiny chemical reactions when mixed. This will also cause damage to the brake system. So the safest way is to use the same brand of qualified brake fluid.

Consumer tips

Qualified brake fluid should meet the latest standards

For some domestic brake fluid manufacturers to violate the national brake fluid production standards and standards, production and sales of inferior brake fluid products, resulting in a large number of substandard brake fluid flooding the market, brake fluid manufacturers to remind consumers that qualified brake fluid Should be in full accordance with the latest national brake fluid standards GB12981-2003 production, hope that consumers can be selected through the product standard screening. Or that sentence: Braking is a big event that is related to life and cannot be ignored.

Brake fluid distinguishes between true and false

The repairman is also difficult to distinguish between pros and cons. From the perspective of the owner, what is the trick of distinguishing the brake oil from the brake oil? “A good brake fluid generally costs dozens of dollars, and most of the brake fluid cost a few dollars! However, to be honest, the brake fluid is good or bad and it is difficult to discern even the repair master!” The person pointed out. “Brake oil? Never bought it! I heard that it is complicated!” “I haven’t changed, I’ve been looking for a repair shop to help!” said the owner, Mr. Wang. The garage pointed out that due to the cumbersome replacement, the vast majority of consumers are directly replacing the brake fluid in the auto repair shop; many owners do not actually know when to replace the brake fluid, most of which are reminded at the 4S shop or garage. Only to replace or add later.

?1. Brake fluid can not be used too thin, no color, transparent can not be used? General qualified brake fluid color is light yellow or dark yellow?.

2. Choose a big brand with reliable quality. Do not mix different brands.

?3. Too cheap to buy. The brake fluid in the general market of less than 10 yuan per liter is basically a poor quality product. The price of a qualified domestic brake fluid is usually more than 40 yuan per liter, and joint venture brands are more expensive.

【Related Links】

There are ways to use brake fluid

There are two types of brakes for cars: oil brakes and air brakes. Oil brake system? Automotive hydraulic brake system? Because of its compact structure, small size, large braking torque and quick and uniform brake braking, low energy consumption, it can also extend the service life of tires, it is not only commonly used in small cars, It has also been widely used on heavy goods vehicles. Brake fluid is a brake fluid for automobiles. It is used in oil brake systems, automotive hydraulic brake systems, and fluids that transmit pressure. Brake fluid is a critical part of the braking system. In order to ensure the safety of driving, the use and replacement of brake fluid must not be sloppy, be careful, pay attention to the following points:

1. When brake fluid is mixed with or absorbed moisture, or if brake oil is found to contain impurities or precipitates, it should be promptly replaced or carefully filtered. Otherwise, the brake pressure will be insufficient, which will affect the braking effect.

2. If the vehicle is normally traveling 40,000 kilometers or the brake oil is used continuously for more than 2 years, the brake fluid is easily deteriorated due to long use time, so it is necessary to pay attention to timely replacement.

3. When the vehicle is in normal running, if the brake suddenly becomes heavy, the brake oil must be replaced in time. Before the replacement, the brake system should be cleaned with alcohol.

4. When the vehicle braking occurs, it is necessary to conduct a comprehensive inspection of the braking system. If it is found that the cylinder expansion of the cylinder pump is too large, there may be a problem with the quality of the brake fluid. At this time, the brake fluid with better quality should be replaced.

5. During the season, especially in the winter, if the brake effect is found to be degraded, it may be that the brake oil level is not suitable for the winter weather. At this time, if you want to replace the new brake fluid, you must select the brake fluid with low viscosity at low temperature.


carbon steel casting WCB, WCC, WC5, WC6, LCC, LCB, LC3, C12A, stainless steel casting CF8, CF8M, CF3, CF3M, gate valve casting, globe valve casting, swing check valve casting, raw casting of gate valve, raw casting of Butterfly Valve , raw casting of globe valve, cast steel casting of gate valve, cast steel raw cating of butterfly valve, China leading foundry for cast steel gate valve, globe valve, swing check valve, ball valve, butterfly valve, and plug valve. Sand mould steel casting, lost wax casting of gate valve, investment casting of ball valve, precision steel casting of gate valve

Forging and Casting

Cast Steel Vs Forged Steel,Cast Iron Vs Forged Steel,Forged Or Cast,Forged Steel Forging Mill Ball Components

SUZHOU RSF VALVE CO.,LTD , https://www.rsf-valve.com