2017-08-14 CCTV news
The car's braking system is an important safety protection system, its performance is directly related to the safety of vehicle drivers and passengers. Recently, AQSIQ import checks the quality of brake pads, brake 469 batches of imported automobiles lining, the friction coefficient 20 brands of 50 batches of product failure, the shear strength of five batches of the product brands 6 Unqualified.
Among them, Toyota in the quality of two consecutive years of random checks, the friction coefficient of the brake pads are not all the batches of all the seized brands.
Friction performance, shear strength is the key to measuring the quality of brake pads
It is understood that the inspection of imported brake pads and inspection items, including the appearance of quality, friction, shear strength, compression strain, packaging signs and other aspects. Which friction performance and shear strength is a measure of the quality of brake pads qualified key indicators.
Friction substandard performance are mainly two cases, one is the measured coefficient of friction is not up to a predetermined minimum value as the standard friction coefficient at each temperature was 0.25, but the friction coefficient of the friction plate less than 0.25 failed. The other is the deviation of the specified coefficient of friction is not qualified, that is, the measured coefficient of friction and brake pads on the package to provide the difference between the coefficient beyond the standard range.
50 batches of imported brake pads friction coefficient failed
The sampling of 469 batches of imported automotive brake lining, a total of 50 batches of product friction coefficient failed. According to the detection of substandard product batches from more to less, and the first alphabetical order of the trademark, involving 20 brands:
TOYOTA, HYUNDAI, SUBARU, VOLVO, BMW, JWORKS, MITSUBISHI, VOLKSWAGEN, AFI, DODGE, FEDERAL MOGUL, FERODO, FORD, ICER, KIA, Land Rover, Mercedes-Benz, MOPAR, Nissan, Suzuki.
Wherein Toyota, Hyundai, Subaru, Volvo four brands have more than four batches of product failure is detected friction coefficient, Toyota 2 consecutive years in quality checks, the coefficient of friction of the brake lining unqualified products are batch Is the most of the seized brands.
6 batches of imported brake pads shear strength failed
On the other hand, shear strength is also an important measure of the quality of automotive brake lining. In the experiment, when the same pressure is applied to the brake lining is fixed on the instrument, defective products will be surface cracks, while the friction material on the brake pad will fall off from above the back plate, so that if during braking, It is easy to cause brake failure, there is a great security risk.
Through the test, the 469 batches of imported car brake lining, a total of 6 batches of product shear strength failed. According to the detection of substandard product batches from more to less, and the first letter of the alphabetical order, involving five brands:
Toyota, Land Rover, MOPAR, Ssangyong, Volkswagen.
Timely inspection, regular replacement of brake pads
Experts, the car's brake system is a joint braking system, composed of many parts, car brake lining is just one of them. In some cases, the brake lining a quality index failed, but the overall brake braking system is still the phenomenon of the standard still exists. The essence of this phenomenon is to conceal the safety risk of driving, resulting in an increase in the potential harm.
Therefore, consumers in the daily car care process, in addition to choose to buy high-quality products, but also timely replacement of car brake lining. General new brake pads in the thickness of about 15 mm, when the wear off one-third, you need to increase the number of inspections, wear to three or four millimeters when you need to replace.
Further, when the following two conditions brake pads must be replaced: First trenches did not wear to the brake pads when; second is to grind both sides of the metal sheet when the brake pads. And some car comes with brake pads wear alarm, alarm lights when it will explain the change.
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