Anti-lock Braking System also known as anti-skid braking system (ABS) is an automobile safety system which prevents the locking of wheels during braking and avoid uncontrolled skidding.
Anti-lock Braking System also known as anti-skid braking system (ABS) is an automobile safety system which prevents the locking of wheels during braking and avoid uncontrolled skidding.
An anti-lock braking system (ABS) is a safety anti-skid braking system used on aircraft and on land vehicles, such as cars, motorcycles, trucks and buses. ABS operates by preventing the wheels from locking up during braking, thereby maintaining tractive contact with the road surface
Electronic Brake force distribution (EBFD)Felis Goja
EBD is an automobile brake technology that automatically varies the amount of force applied to each of a vehicle's wheels based on road conditions, speed, loading on wheel etc.
The Active suspension system
is a type of
automotive suspension system
which controls
the vertical movement
of the wheels
with respect to
the chassis and the vehicle body
1. Passive Suspensions
2. Self Leveling Suspensions
3. Semi-Active Suspension - Slow Active
- Low Bandwidth
- High Bandwidth
4. Full Active Suspension System
An anti-lock braking system (ABS) is a safety anti-skid braking system used on aircraft and on land vehicles, such as cars, motorcycles, trucks and buses. ABS operates by preventing the wheels from locking up during braking, thereby maintaining tractive contact with the road surface
Electronic Brake force distribution (EBFD)Felis Goja
EBD is an automobile brake technology that automatically varies the amount of force applied to each of a vehicle's wheels based on road conditions, speed, loading on wheel etc.
The Active suspension system
is a type of
automotive suspension system
which controls
the vertical movement
of the wheels
with respect to
the chassis and the vehicle body
1. Passive Suspensions
2. Self Leveling Suspensions
3. Semi-Active Suspension - Slow Active
- Low Bandwidth
- High Bandwidth
4. Full Active Suspension System
Traction control basically reduces the slip of the tires on icy surfaces when the car begins to accelerate and prevents wheels to spin. It uses a part of anti-lock braking system (ABS). There are certain indications which warn you to activate and deactivate traction control. While on snow, you should follow some warning signs and drive accordingly.
It is all about Traction Control and its importance for car safety. The slide presentation will help you to know about the types of traction and the roles of traction control system to optimize the grip and stability of a car on the road while running. Traction definitely causes the friction on tire as well as in braking system of a car.
Brake Industry and Brake Simulation
This presentation discusses the business benefits to brake system design, thermal modeling, high fidelity CFD brake cooling and brake noise.
Presentation given by Mike Hebbes, ANSYS Regional Technical Manager
April 3, 2012
The brakes function by absorbing in friction the energy possessed by the moving car. In so doing they convert the energy into heat. There are two types of brakes, the drum brake, and the disc brake. Either or both types may be fitted. But where both types are used it is usual for the disc brakes to be fitted to the front wheels. In both drum and disc brakes, a hydraulic system applies the brakes. The hydraulic system connects the brake pedal to the brake parts at each wheel.
description of abs system. what is abs system and its types. how it came inti existance. what technology is used in anti lock braking system. how it helped in reducing accidents and saved lifes. it was widely used in automobile sector
With ABS system, the driver can brake hard, take the evasive action and still be in control of the vehicle in any road condition at any speed and under any load.
Special Steering Columns, 4 wheel steering system, Electric Power
Steering, Anti–Lock Braking System, Traction Control Systems, Electronic Brake force Distribution
Systems, Corner Stability Control, Hill Assist, and Autonomous Braking System.
9. Figure 106-1 Maximum braking traction occurs when tire slip is between 10% and 20%. A rotating tire has 0% slip and a locked-up wheel has 100% slip.
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16. Figure 106-2 Traction is determined by pavement conditions and tire slip.
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28. Figure 106-3 A good driver can control tire slip more accurately than an ABS if the vehicle is traveling on a smooth, dry road surface.
29. Figure 106-4 A wedge of gravel or snow in the front of a locked wheel can help stop a vehicle faster than would occur if the wheel brakes were pulsed on and off by an antilock braking system.
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33. Figure 106-5 Being able to steer and control the vehicle during rapid braking is one major advantage of an antilock braking system.
41. Figure 106-6 A typical stop on a slippery road surface without antilock brakes. Notice that the wheels stopped rotating and skidded until the vehicle finally came to a stop.
44. Figure 106-7 ABS configuration includes four-channel, three-channel, and single-channel.
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58. Figure 106-8 A typical integral ABS unit that combines the function of the master cylinder, brake booster, and antilock braking system in one assembly.
59. Figure 106-9 A typical nonintegral-type (remote) ABS.
120. Figure 106-16 An ABS three-way solenoid can increase, maintain, or decrease brake pressure to a given brake circuit.
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128. Figure 106-17 The isolation or hold phase of an ABS on a Bosch 2 system.
129. Figure 106-18 During the pressure reduction stage, pressure is vented from the brake circuit so the tire can speed up and regain traction.
130. Figure 106-19 The control module reapplies pressure to the affected brake circuit once the tire achieves traction so that normal braking can continue.
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137. Figure 106-20 An integral ABS unit with a pump motor to provide power assist during all phases of braking and brake pressure during ABS stops.
156. WHEEL SPEED SENSOR 1 A tone ring and a wheel speed sensor on the rear of a Dodge Caravan.
157. WHEEL SPEED SENSOR 2 The wiring from the wheel speed sensor should be inspected for damage.
158. WHEEL SPEED SENSOR 3 To test a wheel speed sensor, disconnect the sensor connector to gain access to the terminals.
159. WHEEL SPEED SENSOR 4 Pulling down the rubber seal reveals the connector.
160. WHEEL SPEED SENSOR 5 The ABS controller (computer) on this vehicle supplies a 2.5-volt reference signal to the wheel speed sensors. Set the meter to read DC volts and test at the computer end of the connector for voltage.
161. WHEEL SPEED SENSOR 6 The meter reads about 2.4 volts, indicating that the ABS controller is supplying the voltage to the wheel speed sensor.
162. WHEEL SPEED SENSOR 7 Set meter to read Ohms. The test probes are touched to the terminals leading to the wheel speed sensor and the resistance is 1.1032 k ohms or 1,103.2 ohms.
163. WHEEL SPEED SENSOR 8 With one lead connected to the sensor terminal and the other to a ground, The meter should (and does) read “OL,” indicating that the wheel speed sensor and pigtail wiring is not shorted to ground.
164. WHEEL SPEED SENSOR 9 To measure the output of the wheel speed sensor, select AC volts on the digital multimeter.
165. WHEEL SPEED SENSOR 10 Rotate the wheel and tire assembly by hand while observing the AC voltage output on the digital mul timeter.
166. WHEEL SPEED SENSOR 11 A good wheel speed sensor should be able to produce at least 100 mV (0.1 V) when the wheel is spun by hand.
167. WHEEL SPEED SENSOR 12 After testing, carefully reinstall the wiring connector into the body and under the rubber grommet.
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Editor's Notes
Figure 106-1 Maximum braking traction occurs when tire slip is between 10% and 20%. A rotating tire has 0% slip and a locked-up wheel has 100% slip.
Figure 106-2 Traction is determined by pavement conditions and tire slip.
Figure 106-3 A good driver can control tire slip more accurately than an ABS if the vehicle is traveling on a smooth, dry road surface.
Figure 106-4 A wedge of gravel or snow in the front of a locked wheel can help stop a vehicle faster than would occur if the wheel brakes were pulsed on and off by an antilock braking system.
Figure 106-5 Being able to steer and control the vehicle during rapid braking is one major advantage of an antilock braking system.
Figure 106-6 A typical stop on a slippery road surface without antilock brakes. Notice that the wheels stopped rotating and skidded until the vehicle finally came to a stop.
Figure 106-7 ABS configuration includes four-channel, three-channel, and single-channel.
Figure 106-8 A typical integral ABS unit that combines the function of the master cylinder, brake booster, and antilock braking system in one assembly.
Figure 106-9 A typical nonintegral-type (remote) ABS.
Figure 106-10 A schematic drawing of a typical antilock braking system.
Figure 106-11 Wheel speed sensors for the rear wheels may be located on the rear axle, on the transmission, or on the individual wheel knuckle.
Figure 106-12 A schematic of a typical wheel speed sensor. The toothed ring is also called a tone ring .
Figure 106-13 Wheel speed sensors produce an alternating current (AC) signal with a frequency that varies in proportion to wheel speed.
Figure 106-14 A digital wheel speed sensor produces a square wave output signal.
Figure 106-15 Typical inputs and outputs for brake control modules.
Figure 106-16 An ABS three-way solenoid can increase, maintain, or decrease brake pressure to a given brake circuit.
Figure 106-17 The isolation or hold phase of an ABS on a Bosch 2 system.
Figure 106-18 During the pressure reduction stage, pressure is vented from the brake circuit so the tire can speed up and regain traction.
Figure 106-19 The control module reapplies pressure to the affected brake circuit once the tire achieves traction so that normal braking can continue.
Figure 106-20 An integral ABS unit with a pump motor to provide power assist during all phases of braking and brake pressure during ABS stops.
WHEEL SPEED SENSOR 1 A tone ring and a wheel speed sensor on the rear of a Dodge Caravan.
WHEEL SPEED SENSOR 2 The wiring from the wheel speed sensor should be inspected for damage.
WHEEL SPEED SENSOR 3 To test a wheel speed sensor, disconnect the sensor connector to gain access to the terminals.
WHEEL SPEED SENSOR 4 Pulling down the rubber seal reveals the connector.
WHEEL SPEED SENSOR 5 The ABS controller (computer) on this vehicle supplies a 2.5-volt reference signal to the wheel speed sensors. Set the meter to read DC volts and test at the computer end of the connector for voltage.
WHEEL SPEED SENSOR 6 The meter reads about 2.4 volts, indicating that the ABS controller is supplying the voltage to the wheel speed sensor.
WHEEL SPEED SENSOR 7 Set meter to read Ohms. The test probes are touched to the terminals leading to the wheel speed sensor and the resistance is 1.1032 k ohms or 1,103.2 ohms.
WHEEL SPEED SENSOR 8 With one lead connected to the sensor terminal and the other to a ground, The meter should (and does) read “OL,” indicating that the wheel speed sensor and pigtail wiring is not shorted to ground.
WHEEL SPEED SENSOR 9 To measure the output of the wheel speed sensor, select AC volts on the digital multimeter.
WHEEL SPEED SENSOR 10 Rotate the wheel and tire assembly by hand while observing the AC voltage output on the digital mul timeter.
WHEEL SPEED SENSOR 11 A good wheel speed sensor should be able to produce at least 100 mV (0.1 V) when the wheel is spun by hand.
WHEEL SPEED SENSOR 12 After testing, carefully reinstall the wiring connector into the body and under the rubber grommet.
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