What are the faults of the anti-lock braking system?
2 Answers
Fault phenomena of the anti-lock braking system include the brake pedal not rising and lacking resistance when pressed; poor braking effect when the pedal is fully depressed; no improvement in braking effect with continuous braking, and the pedal gradually rising. Below is more information about wheel lock-up: 1. Introduction: Wheel lock-up refers to the sudden locking of wheels when braking, causing the vehicle to lose steering ability, typically occurring in vehicles without ABS (Anti-lock Braking System). 2. Phenomena: In cars without ABS, if the brake pedal is pressed hard while driving, the wheel speed rapidly decreases. When the braking force exceeds the friction between the wheels and the ground, the wheels lock up. Fully locked wheels increase the friction between the tires and the ground, potentially leading to skidding and loss of directional control under significant inertia. If the front wheels lock up, the driver cannot control the vehicle's direction. If the rear wheels lock up, skidding is more likely. 3. Main hazards: Wheel lock-up is caused by excessive braking force between the brake pads and discs or drums. However, due to the vehicle's high inertia, it continues moving forward, with the tires sliding rather than rolling, preventing direction changes and leading to accidents. Even with low inertia, in crowded or heavy traffic, closely following vehicles may result in sudden stops due to wheel lock-up, increasing the risk of rear-end collisions. If the front wheels lock up before the rear wheels, the car loses steering ability. If the rear wheels lock up first, it may cause skidding.
Anti-lock Braking System (ABS) failures can manifest in various ways. Issues may include dirty or faulty wheel speed sensors (like when mud causes signal inaccuracies), aging or loose wiring leading to poor contact (especially rust-prone connectors), ABS pump or hydraulic modulator malfunctions (resulting in delayed brake response or unusual noises), control module problems (system shutdown when warning light activates), or blown fuses triggering warning lights. With years of driving experience, I've encountered such issues where braking distance increased, nearly causing accidents during rain/snow due to skidding. Professional diagnosis with specialized tools is crucial – never attempt DIY repairs to avoid greater risks.
