What is the difference between with ABS and without ABS?
4 Answers
The differences between with ABS and without ABS are as follows: 1. ABS is an anti-lock braking system that can effectively keep the wheels in a rotating state, improving the stability of the car during braking and the braking performance under poor road conditions. 2. ABS continuously detects the speed of each wheel through speed sensors installed on each wheel or drive shaft. The computer calculates the current wheel slip rate, compares it with the ideal slip rate, and makes a decision to increase or decrease the braking pressure. It commands the actuator to adjust the braking pressure in time to keep the wheels in an ideal braking state. 3. Without ABS, when emergency braking is applied, all four wheels will be completely locked, causing skidding and even spinning or fishtailing. 4. ABS can prevent loss of steering control and wheel skidding during emergency braking, ensuring the wheels are not locked during braking. The tires do not rub against the ground at a single point, increasing friction and achieving a braking efficiency of over 90%.
Actually, the most direct function of ABS is to allow you to steer while braking hard. In a car without ABS, when you slam on the brakes, the wheels lock up completely, and the tires drag rigidly on the ground, causing the car to slide straight forward. At this point, turning the steering wheel is useless. In a car with ABS, the system detects when the wheels are about to lock up and automatically applies high-frequency pulsing brakes (dozens of times per second), keeping the wheels rolling. This way, you can brake and steer simultaneously to avoid obstacles. Especially on wet, snowy, or icy roads, cars without ABS are particularly prone to losing control and fishtailing. My old car doesn’t have ABS, and once on a rainy day, I almost rear-ended someone—when I slammed on the brakes, the car just slid sideways, which really scared me and made me break out in a cold sweat.
The difference is most noticeable on slippery roads. Last winter, I drove a friend's old car (without ABS) back to my hometown. When crossing an icy bridge, the car in front suddenly braked. I instinctively slammed on the brakes, causing the steering wheel to lock instantly. The car slid forward like a block of ice, nearly hitting the guardrail. Later, I tried the same scenario in my own car with ABS. The brake pedal clicked and pulsed underfoot, allowing the car to decelerate steadily while still enabling minor steering adjustments. Additionally, emergency lane changes are safer. In a car without ABS, forcefully turning during hard braking can easily cause a rollover, whereas ABS allows you to brake and steer simultaneously. Each wheel independently modulates braking force, keeping the vehicle much more stable.
The biggest difference is the risk of losing control. I've seen many crash cases involving cars without ABS during repairs - when braking hard, the left front wheel hits sand and locks up first, causing the car to jerk violently to the left as if pulled by an invisible hand; or when braking while turning, the rear wheels directly slide sideways into a spin. ABS uses sensors to monitor the rotation speed of each wheel. If it detects a wheel rotating slower, it momentarily releases the brake to ensure all wheels decelerate synchronously. Although ABS may slightly increase braking distance by a few meters on dry pavement, it provides controllability. Honestly, in an emergency, how many average drivers remember the 'pump braking' technique?
