鼓刹的刹车力确实比盘刹大，不过我们也不一定难发觉身边的车辆盘刹的使用越来比较多，这主要是由各自的特点及汽车行业趋势所决定的。
The braking force of drum brake is indeed greater than that of disc brake, but it is not necessarily difficult for us to find that disc brakes are used more and more by vehicles around us, which is mainly determined by their own characteristics and the trend of the automobile industry.
盘刹盘刹做为当前乘用车使用更广泛的刹车形式，其主要由真空助力器、刹汽车车主缸、电控模块、刹车分泵、刹车硬管软管、刹车卡钳和刹车盘共同组成。工作流程是刹车踏板力经过助力器放大，推动刹汽车车主缸活塞运动推动刹车液经过电控模块常开阀和刹车管达到刹车分泵，作用于刹车分泵活塞推动刹车片和刹车盘摩擦来制动车辆。按照车辆的主要参数、性能指标和成本权衡确定全部的零部件系统的主要参数指标，大多数刹车管路的压力可以到了120bar到180bar之间。
As the most widely used brake form of passenger cars, disc brake is mainly composed of vacuum booster, brake cylinder, electronic control module, brake cylinder, brake hard pipe hose, brake caliper and brake disc. The working process is that the brake pedal force is amplified by the booster to push the brake cylinder piston of the car owner to move, and the brake fluid reaches the brake cylinder through the normally open valve of the electronic control module and the brake pipe, which acts on the brake cylinder piston to push the friction between the brake pad and the brake disc to brake the vehicle. The main parameters and indexes of all parts and systems are determined according to the main parameters, performance indexes and cost trade-offs of the vehicle. The pressure of most brake pipelines can be between 120bar and 180bar.
制动力刹车管路的压力可以到了120bar到180bar，这相当于是120和180标准大气压的数值，压力通过刹车分泵作用于刹车片和刹车盘，造成15000N上下的正压力，在考虑盘片系统之间大概0.35的摩擦系数以及盘片接触到轮毂轴承的半径即可算出制动扭矩的数值，大多数单个刹车系统的扭矩基本都高于一千N. m。
Braking force the pressure of the brake pipeline can reach 120bar to 180bar, which is equivalent to the value of 120 and 180 standard atmospheric pressure. The pressure acts on the brake pad and brake disc through the brake wheel cylinder, resulting in a positive pressure up and down of 15000n. The braking torque can be calculated by considering the friction coefficient between the disc systems of about 0.35 and the radius from the disc contact center to the hub bearing, The maximum torque of most single braking systems is basically higher than 1000 n. M.
鼓刹鼓刹同样是刹车液进到刹车分泵，然后才顶开刹车蹄片和刹车鼓接触，借助于相互之间的摩擦力实行制动。在相似管路压力的前提下，刹车蹄片和刹车鼓的摩擦系数和盘片系统相似或相似，不过鼓刹的刹车蹄片与刹车鼓的接触面积更大，且相似尺寸的鼓刹比盘刹的有效果作用半径更大，因而刹车力矩和效率基本都高于盘刹。
Drum brake drum brake also means that the brake fluid enters the brake wheel cylinder, and then the brake shoe is pushed open to contact the brake drum, so as to brake with the help of mutual friction. Under the premise of similar pipeline pressure, the friction coefficient of brake shoe and brake drum is similar or similar to that of disc system, but the contact area between brake shoe and brake drum of drum brake is larger, and the effective action radius of drum brake with similar size is larger than that of disc brake, so the braking torque and efficiency are basically higher than that of disc brake.
盘刹鼓刹对比
Comparison of disc brake and drum brake
盘刹的主要优势是散热性好，抗热衰退性能强，缺点是刹车力小，制造工艺复杂且成本较高，出于防止污染物杂质进到盘片系统还需要额外添加防溅板。鼓刹是刹车力大，成本低廉及用于驻车刹车时稳定性优越，缺点是密封结构引起散热性和抗热衰退性能较差，理所当然大多数用于紧凑型汽车的后轮刹车。
The main advantages of disc brake are good heat dissipation and strong heat recession resistance. The disadvantages are small absolute braking force, complex manufacturing process and high cost. In order to prevent pollutants and impurities from entering the disc system, additional splash plates need to be added. Drum brake has large absolute braking force, low cost and excellent stability when used for parking brake. The disadvantage is that the sealing structure causes poor heat dissipation and heat recession resistance. Of course, most of them are used for rear wheel braking of compact vehicles.
为什么盘刹会成为流行
盘刹逐渐取代鼓刹主要是时代技术进步的结果，随着基础设施和汽车速度的稳步提高，刹车流程中的热量越来比较多，要知道汽车的动能与其速度的平方成正比，而这些动能差不多基本都转换成了刹车流程中的热量，这些热量会很快的传递给刹车系统。盘刹可以借助于空心盘等结构措施来实行很快的散热，而鼓刹因为结构限制就无法很快的散热而引起溫度升高性能衰退。
Why disc brake becomes popular < br / > disc brake gradually replaces drum brake is mainly the result of technological progress of the times. With the steady improvement of infrastructure and vehicle speed, there is more and more heat in the braking process. You should know that the kinetic energy of the vehicle is directly proportional to the square of its speed, and these kinetic energy are almost converted into heat in the braking process, This heat is quickly transferred to the braking system. The disc brake can quickly dissipate heat with the help of structural measures such as hollow disc, while the drum brake cannot dissipate heat quickly due to structural constraints, resulting in temperature rise and performance degradation.
其次是随着汽车电子调节技术和MOC卡钳的发展，后轮使用MOC卡钳一方面可以节省成本（可以供给电子驻车制动功能），与此同时也可以更好的实行车辆协调调节，添加了非常多额外的功能。
Secondly, with the development of automotive electronic adjustment technology and MOC calipers, the use of MOC calipers on the rear wheels can not only save costs (provide electronic parking brake function), but also better implement vehicle coordinated adjustment and add a lot of additional functions.
鼓刹是有其优点的，在汽车发展历程中也曾占有一席之地。随着行业的深度发展，其固有的缺陷被时代放大而不可接受，电控时代需要盘刹做出更大的贡献。
Drum brake has its advantages and once occupied a place in the process of automobile development. With the in-depth development of the industry, its inherent defects are magnified and unacceptable by the times. The era of electronic control needs disc brake to make greater contributions.
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