What is a Dual Servo Brake?
2 Answers
Dual servo brake refers to a brake where both brake shoes act as servo shoes when the vehicle is moving forward. The arrangement of the fixed components in dual leading shoe, bidirectional dual leading shoe, and dual servo brakes is centrally symmetrical. A brake where both brake shoes act as servo shoes when the vehicle is moving forward is called a dual servo brake. A dual shoe brake refers to a brake where both shoes act as leading shoes when the brake drum rotates forward. Dual leading shoe: When the brake drum rotates forward, both shoes act as leading shoes, which is called a dual leading shoe brake. A brake where both brake shoes act as trailing shoes during forward braking is called a dual trailing shoe brake.
I've worked on many cars before, and the double-wishbone suspension is actually quite easy to understand. It's just that each wheel has two fork-like arms connecting the body and the wheel, one on top and one at the bottom. This setup allows the wheel to move up and down more independently. I often see it in performance cars or older models in the garage, such as some sports cars or SUVs equipped with this system. It provides better shock absorption when driving over bumpy roads, reducing excessive body sway and improving handling stability. Because the upper and lower arms are well secured, the tire contact area is larger, offering stronger grip during turns or high-speed driving and reducing slippage issues. However, this system takes up more space, requiring extra room in the body design. It's also more complex to install and may be harder to repair, with the arm connection points prone to wear and rust, requiring regular inspection and lubrication. The upside is its high durability—long-term driving feels more reassuring, with noticeable safety improvements, especially in rainy or snowy conditions where it boosts driving confidence.
