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The first double piston disc average wear Knorr disc brake

May,14,2022 << Return list

As we all know, disc brake has incomparable technical advantages over drum brake. At present, in the field of commercial vehicles, especially trucks, due to cost constraints, disc brakes are generally only equipped on high-end heavy trucks, and they are basically front disc and rear drum. In contrast, European main engine plants have introduced air disc brakes in batches since the early 1990s. After 2008, more than 95% of European trucks have been equipped with air disc brakes as standard.

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The first double push disc average wear Knorr disc brake detailed explanation


In the Knorr booth of the Shanghai auto show, Knorr also exhibited the main product of the brand - air disc brake. Knorr disc brakes are all air brake without hydraulic system. The disc brakes exhibited on site are divided into three sizes: 17.5 inches, 19.5 inches and 22.5 inches according to the rim diameter. The larger the size, the greater the braking torque can be generated, which are applicable to light truck, medium truck and heavy truck respectively.


air disc brakes are lighter, safer and more comfortable


Although the installation of disc brakes on trucks is not very popular in China, disc brakes have the following advantages over drum brakes:

The first double push disc average wear Knorr disc brake detailed explanation


● safer


Disc brake has compact structure, small number of parts and high transmission efficiency. It shows the advantages of rapid and sensitive braking response, and can meet the requirements of high braking torque, fast response and short braking distance in case of emergency braking. The test shows that the overall configuration is 6 × 4. When the tractor is coupled with a 3-axle trailer, the braking distance will be shortened by about 30% during emergency braking, that is, when it is emergency braking at the initial speed of 60km, the braking distance can be shortened by about 10m, which can really avoid the tragedy of vehicle destruction and human death.


● light weight


The data show that the mass of the front axle and the rear axle can be reduced by about 20 kg and 80 kg respectively. For 6 × 4. The tractor is coupled with a 3-axle trailer, and the mass of the whole vehicle is reduced by about 250kg. With the enforcement of gb1589-2016, the overall configuration of vehicles has higher transportation efficiency and greater benefits for the fleet.


● more comfortable


The disc brake has no self increasing effect, and the braking process is more comfortable and stable; The practice shows that the braking torque difference between the left and right wheels of disc brake vehicles is less than 10%, and the difference between the left and right wheels of drum brake may be as high as 30%. Therefore, driving comfort can be improved.


The first double push disc average wear Knorr disc brake detailed explanation


Knorr pioneered the design of double push plate to average the wear of friction plate


The first double push disc average wear Knorr disc brake detailed sn7 disc brake


One of the sn7 disc brakes on display at the scene is the air disc brake launched by Knorr, which is suitable for all heavy vehicles. The size is 22.5 inches. At present, it is installed in cooperation with most main engine manufacturers in China.


According to the introduction, the double push disc structure pioneered by Knorr in the disc brake can make the output braking force more stable, so as to homogenize the degree of edge wear of friction plates on both sides, which is not only conducive to the unified replacement of friction plates by many large fleets and the curing cost, but also improve the driving safety of vehicles and have more reliable braking performance.


For the first time, the average wear of double push disc Knorr disc brake is explained in detail. The disc brake adopts Protecs ® technology


In addition, the brake chamber of this disc brake has high stroke reservation capacity, which can ensure that the maximum braking torque can be brought into full play; Protecs is adopted for disc brake ® The technology avoids the repeated use of friction plate compression spring in practical application.


Sn7 disc brake has a braking torque of 27knm, and the most suitable structure is selected to reduce the weight


Today, all truck parts are pursuing lightweight. Compared with other brands, Knorr's disc brake optimizes the structural design. The brake caliper body and support adopt lightweight design. Many unnecessary places in the structure are excavated and the structure most suitable for the performance requirements is adopted. The final overall weight is only 42kg (including friction plate), while the average weight of other brands is about 44kg.


The first double push disc average wear Knorr disc brake detailed explanation


When looking at the quality of a disc brake, the braking torque is a very important parameter, which represents the braking force that can be provided in case of emergency. Some brands will reduce the braking torque of the brake in order to pursue lightweight or compact structure, which also reduces the safety factor of the vehicle to a certain extent. While reducing the weight of knorrsn7 disc brake, it ensures that the braking torque is 27knm and the braking force is still strong, so as to ensure the safety of vehicle driving.


Improve general after-sales service efficiency


In addition to the product itself, after-sales is also the concern of major OEMs and end customers. Knorr can also provide a series of services with rich innovative technologies for dealers, workshops and fleet operators. Knorr's disc brake after-sales accessories are universal, which greatly improves the efficiency of after-sales service.


The first double push disc average wear Knorr disc brake detailed explanation


At present, at least one Knorr authorized after-sales service dealer and service network can be found in each province. All users can enjoy the original parts of the brake system produced by Knorr all over the world, and can provide fast and detailed technical support and after-sales service. In the future, Knorr will also establish high-standard professional maintenance service dealers under the professional training system to provide more perfect and high-quality services for Chinese commercial vehicle customers.


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