Anti Lock Braking System
Chapter Four ABS Training
4.1 What is ABS?
Anti-Lock Brake System (ABS) is a combination of vehicle hardware and software that work together to maintain steering control and vehicle stability during hard braking. Initially developed as a special option for topof-the-line models, today’s ABS units are compact, easy to service, inexpensive and widely available. Now every major automotive manufacturer offers some form of ABS vehicle control that provides safe, maximum braking under all weather conditions and road surfaces.
"FULL"
Fig. 1
Integral. INTEGRAL systems incorporate the power unit (pump and accumulator), master cylinder, and control valve mechanism into one hydraulic unit. An external microprocessor and individual wheel sensors complete the system. The Teves Mark II system (Fig. 1) is an example of an integral unit.
INTEGRAL AND NON-INTEGRAL
There are basically two types of Anti-Lock (or AntiSkid) Brake Systems–Integral and NonBOOSTER PUMP AND MOTOR
The other type of ABS is referred to as NONINTEGRAL or ADD-ON. The non-integral system incorporates ABS components into the standard brake system. Added to the power brake unit, master cylinder, and calipers are a microprocessor (computer module), modulator valve, and speed sensor(s). A lateral accelerator
BOOST PRESSURE SWITCH (IN MODULATOR) PROPORTIONING VALVE DIFFERENTIAL SWITCH PRESS MODULATOR
MASTER CYLINDER/ POWER BOOSTER
ECU ACCUMULATOR AND PRESSURE SWITCH LEFT FRONT SENSOR REAR WHEEL SENSOR SENSOR CONNECTORS/ WIRES RIGHT FRONT SENSOR
Fig. 2
18
MASTER CYLINDER
REAR BRAKE CHANNEL
CONTROL VALVE ASSEMBLY
ABS MODULE
Fig. 3
switch, measuring side “G” forces, can also be a part of this system. Because of its lower cost, vehicle manufacturers are designing add-on systems for the majority of the future vehicle population. The typical components used in a nonintegral system are shown in Fig. 2.
speed of both rear wheels. This type of setup saves the cost of an additional sensor and reduces the
4.1 What is ABS?
Anti-Lock Brake System (ABS) is a combination of vehicle hardware and software that work together to maintain steering control and vehicle stability during hard braking. Initially developed as a special option for topof-the-line models, today’s ABS units are compact, easy to service, inexpensive and widely available. Now every major automotive manufacturer offers some form of ABS vehicle control that provides safe, maximum braking under all weather conditions and road surfaces.
"FULL"
Fig. 1
Integral. INTEGRAL systems incorporate the power unit (pump and accumulator), master cylinder, and control valve mechanism into one hydraulic unit. An external microprocessor and individual wheel sensors complete the system. The Teves Mark II system (Fig. 1) is an example of an integral unit.
INTEGRAL AND NON-INTEGRAL
There are basically two types of Anti-Lock (or AntiSkid) Brake Systems–Integral and NonBOOSTER PUMP AND MOTOR
The other type of ABS is referred to as NONINTEGRAL or ADD-ON. The non-integral system incorporates ABS components into the standard brake system. Added to the power brake unit, master cylinder, and calipers are a microprocessor (computer module), modulator valve, and speed sensor(s). A lateral accelerator
BOOST PRESSURE SWITCH (IN MODULATOR) PROPORTIONING VALVE DIFFERENTIAL SWITCH PRESS MODULATOR
MASTER CYLINDER/ POWER BOOSTER
ECU ACCUMULATOR AND PRESSURE SWITCH LEFT FRONT SENSOR REAR WHEEL SENSOR SENSOR CONNECTORS/ WIRES RIGHT FRONT SENSOR
Fig. 2
18
MASTER CYLINDER
REAR BRAKE CHANNEL
CONTROL VALVE ASSEMBLY
ABS MODULE
Fig. 3
switch, measuring side “G” forces, can also be a part of this system. Because of its lower cost, vehicle manufacturers are designing add-on systems for the majority of the future vehicle population. The typical components used in a nonintegral system are shown in Fig. 2.
speed of both rear wheels. This type of setup saves the cost of an additional sensor and reduces the