The drum brake for the front wheels comes back. Suppliers Continental would like to show with a test vehicle that the old technology even in modern cars Can make sense. The tried and tested technology should again become a real alternative to disc brakes, especially for electric cars. For more than 50 years, drum brakes on the front axle have not been an issue in vehicle development, only on the Rear axle and in smaller vehicle segments the drums still play a role today. AUTO BILD explains the technical approach, shows the potential of the technology and has already driven the prototype.
This is how the drum brake works
But the bottom line is: It is exciting to see how little new drum brakes can differ from current disc brake systems. In small to medium-sized electric vehicles that take their main braking power from recuperation and thus from the drive, the technology can experience a renaissance.
Duo servo brake as the means of choice
In the case of electric cars, the Continental engineers also see the brake application area. In principle, drum brakes can be divided into different subtypes. the the simplest variant is the simplex brake. It has two brake pads, which are operated by a wheel cylinder. The duo-servo brake is significantly more complexthat the test car works with. Here the two brake shoes are also pressed against the drum wall by just one wheel cylinder, but the other end of the shoe is floating. This increases the braking effect.
E-cars could benefit in the future
The use of drum brakes on the front axle is still not an issue in the automotive industry. The engineers from Frankfurt firmly believe that this type of brake can do more than just support the rear axle. The prototype shows that it can work, but larger electric vehicles will probably continue to work with disc brakes.