Jiaozuo brake

Talking about Brake Jitter of Disc Brake

Brake judder of disc brake is a typical brake system fault, which involves the generation and transmission of brake vibration and noise as well as the subjective feelings of passengers. Brake judder can accelerate the aging and fatigue damage of related components in the transmission path, affecting the driving comfort of the vehicle.

The issue of brake jitter is generally caused by lower order disturbances in the braking system. Low frequency shaking is mainly caused by brake torque fluctuations, and the frequency of shaking is in some order relationship with the vehicle speed. The frequency is below 100 Hz, and most shaking occurs near the vehicle speed of 60 km/h.

Brake judder can generally be divided into cold judder, hot judder, new car judder, wet judder (when there is water between the friction pairs), and rust judder according to the phenomenon. Cold shaking is mainly caused by irregular geometric dimensions of the brake disc or shaking of the friction plate, which affects the fluctuation of brake pressure and torque. Most cold shaking is a 1-5 order low-frequency vibration. Thermal jitter is caused by local thermal instability of the brake disc, resulting in thermal deformation. Thermal jitter generally occurs after multiple emergency brakes during high-speed driving, and the temperature of the brake disc rapidly increases. New car shaking is generally caused by uneven friction between the brake pads and brake discs during the new car's break-in period. Wet shaking is mainly caused by uneven braking pressure caused by water film between the brake disc and friction plate during rainy days, resulting in brake torque fluctuations. Rust shaking is caused by the Friction torque fluctuation between the friction plate and the brake disc after the brake disc is rusted. Generally, the shaking disappears after the rust is removed.