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The ANTILOCK BRAKES or ABS
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Dodge Grand Caravan Sport @ dodge.com showing antilock brakes in wet weather
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What are antilock brakes?
When these brakes are pressed hard (like in a panic stop or accident) the ABS pumps the brakes up to 30 times/sec. This occurs in an alternating pattern, left front/right rear and right front/left rear. This system helps the driver maintain control and stop the car in a straight line rather than spinning out of control. ABS does NOT stop the car faster. It enables you to stop it where you want to. In other words, when you slam on the brakes, the car will head the direction you turn the wheel while you are braking. ABS also helps when stopping the car in adverse weather conditions like ice, snow, and rain.
During normal braking, the ABS and non-ABS brake pedal feel will be the same. During ABS operation, a pulsation can be felt in the brake pedal, accompanied by a fall and then rise in brake pedal height and a clicking sound. The 4-wheel anti-lock brake system is self-monitoring. When the ignition switch is turned to the RUN position, the anti-lock brake control module will perform a preliminary self-check on the anti-lock electrical system indicated by a three second illumination of the yellow ABS wanting indicator.
How to know if your car is equiped with antilock brakes (This is for every makes and models)
1- A yellow light like this (ABS) will go one when you start your cars
2- Feel the brake pedal kick when they are activated.
3- Shorter brakes pad life.
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antilock brakes are, today, standard features on most of our cars and minivans
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The Attack on Anti-Lock Brakes
On Sunday, December 17, 1995, the Arizona Republic ran a front page article about a disturbing new insurance trend. USAA, the fifth-largest automobile insurer in the United States, has announced that discounts for vehicles equipped with anti-lock brakes (ABS) will cease, after finding no substantial difference in accident claims between vehicles equipped with ABS and those without ABS. Allstate, which is larger than USAA, is also considering canceling their ABS discount. The study on which these findings are based was funded by the insurance industry.
Auto industry officials are angered by USAA's move, particularly since the rapid development of ABS systems was in response to pressure from the insurance industry and not governmental regulations. William Noack, regional director of communications for General Motors, told the Arizona Republic "It seems rather unusual that the same companies who were urging the manufacturers to install anti-lock braking systems are now removing the discounts from cars and trucks that have those systems."
Why does the data indicate that ABS fails to reduce accidents? Safety experts have determined that people do not know how to use ABS effectively when confronted with an emergency situation. Most of the driving populace learned accident-avoidance techniques before ABS was developed. Drivers learned to pump their brakes to keep the wheels from skidding, and years of experience behind the wheel has taught drivers what the pedal should feel like, in emergency as well as non-emergency situations. The brake pedal of an ABS-equipped car behaves quite differently when ABS is engaged.
Anti-lock brakes are controlled by a computer chip which senses when a wheel is locked up, or is about to lock up. When this occurs, the computer tells brake sensors to apply intermittent brake pressure, which prevents the wheel from locking. Essentially, the computer and brake sensors do exactly the same thing drivers would do if they pumped the brakes. The only difference is that the computer-controlled sensors can pump the brakes much quicker than any person can.
When ABS engages, a loud grating sound and rapid brake pedal pulsation often accompanies the pumping action. When this occurs, insurance companies and safety experts theorize, drivers assume that something has gone wrong with their brakes, and they begin to pump the pedal or simply lift off the brake pedal, which defeats the system.
Some drivers forget that ABS allows them to continue steering the car, since the front wheels aren't locked up. Often, drivers successfully avoid an obstacle in the road by yanking on the steering wheel, but to their surprise the car actually responds, and the turn of the steering wheel that avoids the obstacle in the road ends up putting the vehicle off the road, where it sometimes crashes.
Experts and insurance representatives appear to be evenly split on whether drivers or ABS engineers are to blame, according to the Arizona Republic article. Edmund's lays blame squarely on drivers who own cars with ABS systems. "Anti-lock brakes are one of the most important automotive safety advances in recent history," says Christian Wardlaw, automotive editor for Edmund Publications. "People who buy vehicles equipped with these systems need to re-educate themselves and lose those old ingrained habits. They need to go to a vacant parking lot on a wet or snowy day, and practice using ABS so they know what to expect when an emergency situation presents itself."
Volvo Cars of North America, Inc. included a press release about ABS, and the insurance industry study, in its 1996 media press kit. Titled "Don't be Mystified by ABS Brakes," the release explains the proper use of ABS. Jim Nordmann, Volvo's manager of technical services, says it will take a lot of unlearning on the part of the driving public to use anti-lock brake systems effectively. "Apply constant pressure to the brake pedal in a car with ABS... and steer around any obstacles that might be in the roadway. You want to stay on the brakes until you clear whatever obstacle is in your path."
Manufacturers of anti-lock braking systems agree. They don't believe drivers are well-educated, if at all, about the use of ABS. Several brake suppliers have formed the ABS Education Alliance in Washington, D.C. to educate drivers about the system.
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2004 Dodge Stratus shows it's safety feature. Keyless entry standard on all model, Sentry key engine immobilizer and Antilock brakes
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