What is the reason for the high failure rate of imported brake pads?
Whether ordinary scooters or high-end luxury cars, or gorgeous appearance or surging power, stopping and walking freely during driving is the first element of driving safety. To do this, in addition to skilled driving skills, automobile brake linings, commonly known as brake pads, play a vital role. The brake pad is a well-known part of many car owners. Although it is small, it is the most basic and important part of the brake safety system. However, due to high-frequency use, the probability of damage to the brake pad is not small.
It is difficult to define the service life of brake pads with a clear number of kilometers or time. Because everyone's driving conditions and road conditions are different, the wear of brake pads is different. Maybe some cars need to replace the brake pads after 30000-40000 kilometers, and some people don't need to replace the brake pads after 100000 kilometers. And a set of unqualified brake pads will do endless harm. Due to the early start of foreign automobile manufacturing and mature technology, many people believe that driving an imported car, especially a luxury car, has absolutely no problem with its braking performance and safety factor, but what is the fact?
In 2016, AQSIQ randomly inspected 469 batches of brake linings imported from China, and 278 batches were found to be unqualified, with the unqualified detection rate of 59.3%. The main reasons for the unqualified were unqualified packaging and marking and unqualified friction performance.
The spot check involves 29 entry-exit inspection and quarantine bureaus across the country. The spot check links include markets, ports, product distribution centers, product use places, etc. In terms of origin, 18 countries of origin were involved in the spot check of commodities, among which Japan, Germany, Italy, the United States and South Korea had a relatively large number of spot checks, totaling 401 batches, accounting for 85.5% of the total batches.
From the perspective of brands, the random inspection of commodities involves more than 40 brands, including BMW, Mercedes Benz, Toyota, Volkswagen, Subaru and other brands.
In addition to BMW, Mercedes Benz, Toyota, Volkswagen and Subaru, the list of unqualified projects also includes products of more than 280 brands and models, including Audi, Kia, Nissan, jeep, Mazda, Mitsubishi, GM, Land Rover, Hyundai, Infiniti, Volvo, Ford, Honda, Suzuki, dodge and Jaguar.
The spot check commodities are inspected in strict accordance with the national mandatory standard GB 5763-2008 brake linings for automobiles. The inspection items include appearance quality, friction coefficient, deviation of specified friction coefficient, wear rate, shear strength, impact strength, thermal expansion rate, compression strain, mark, packaging, etc.
According to the statistical results, the detected unqualified items include 251 batches of unqualified packaging and marking, accounting for 90.3%, an increase of 16.7% over 2015; 50 batches of unqualified friction properties, accounting for 18%, down 49.9% from 2015; 6 batches of unqualified shear strength, accounting for 2.2%, down 38.9% from 2015. (Note: the same commodity may involve multiple nonconformities at the same time).
Among them, "unqualified packaging and marking" mainly shows that the product packaging has no Chinese logo, the Chinese logo is incomplete, and the designated friction coefficient and GB 5763-2008 standard number are not printed. The unqualified rate of the project showed an increasing trend because in the supervision and random inspection in 2016, all imported automobile brake linings were tested for packaging and marking, while in the random inspection in 2015, only about 60% of the goods were tested for packaging and marking. The unqualified rate of the two key items of friction performance and shear strength decreased significantly, indicating that the overall quality of brake linings for imported vehicles was significantly improved.
For the above unqualified commodities found in the supervision and random inspection, the inspection and quarantine bureaus directly under them have handled them according to law, so as to effectively safeguard the legitimate rights and interests of consumers.
Imported brake pads have high standards but lack strict requirements
AQSIQ carried out the inspection of the spot checked commodities in strict accordance with the national mandatory standard GB 5763-2008 brake linings for automobiles. The inspection items include appearance quality, friction coefficient, deviation of specified friction coefficient, wear rate, shear strength, impact strength, thermal expansion rate, compression strain, marking, packaging, etc.
Authoritative analysis points out that the brake pad industry in foreign developed countries is currently in a leading position in terms of technology and quality management. The development of brake pad manufacturers and vehicle enterprises is synchronous. From the selection of brake pads to the delivery of samples, they must undergo repeated tests such as noise detection, bench test, matching test and road test in winter and summer, It can not be mass produced until its performance meets the requirements and is stable.
Foreign standards for brake and transmission linings (blocks) and assemblies mainly include European series, American series, Japan (standards of Japan Automobile Industry Association) and ISO series. ISO series is mainly formulated with reference to European standards.
American standards mainly include SAE, FMVSS, ameca, etc; European standards mainly include regulations such as AK (such as AK1, ak2, ak3, AKM), ECE (R13, r13h, r90), eec71 / 320; Japanese standards include Jaso and JIS D.
American and European standards are basically divided into host supporting use, such as fmvss121, 122, 105, 135 in FMVSS, ameca, R13, r13h and iso11057, replacement (after-sales) standards such as sae2430, tp121, r90 and meeting the minimum requirements of ecerl3. There are no mandatory standards in the United States, but they must be approved before sales. In the European market, emark certification must be carried out before sales. Iso15484-2005 (DIS) is mainly formulated according to the original global specifications, quoting SAE, Jaso, JIS D and ECE r90, and specifying the quality control requirements. It is a relatively perfect standard for automotive friction materials.
According to the Japanese Industrial Standard JIS d4411-1993 brake linings and linings for automobiles, China formulated the national standard gb5763-2008 brake linings for automobiles, which was implemented on September 10, 2009. The standard formulated new test specifications and evaluation methods to improve the entry threshold of the brake lining industry and the product quality of brake linings in China, Better supervise and standardize the development of brake lining industry.
Experts generally believe that although China's brake products have national standards and industrial standards, at present, the brake lining not only improves the requirements on safety performance, but also improves the technical process. However, compared with the complete foreign ISO, SAE, Jaso and European ECE, EEC regulations and other advanced standards, the standard level is quite different, which is not conducive to the products participating in international competition, And the existing standard system is not perfect, and there are many methods and standards are not perfect.
As a foreign brake pad with perfect standards, it can not meet the domestic standards. It can be seen that the brake pad exporting countries lack strict control over the quality and safety of exported products. In order to ensure the interests and safety of Chinese consumers, AQSIQ, customs and other relevant departments should increase and strengthen the supervision and control of the quality and safety of such imported products from the source.