Freescale Semiconductor, Inc.
Chassis/Safety
ELECTROHYDRAULIC BRAKING
KEY BENEFITS
SG2007/D, REV 0
12/2002
Freescale Semiconductor, Inc...
鈥?Reuses hydraulic system
technology while incrementally
building on the development of
advanced electronic systems, such
as electronic stability programs
(ESP), traction control, and brake
assist
鈥?Uses software updates to simplify
the calibration process by
adjusting brake response and
pedal feel
鈥?Improves connectivity with other
emerging systems, such as
adaptive cruise control
鈥?Removes the large vacuum servo to
allow flexible installation
鈥?Features an anti-lock braking
system (ABS) without feedback
from the pedal
OVERVIEW
Electrohydraulic braking (EHB) systems are
designed to allow electronic control of vehicle
braking while retaining a reduced hydraulic
system. The hydraulic system functions as a
reserve in the event of a failure in the electronic
control.
The EHB control unit receives inputs from sensors
connected to the brake pedal. In normal operation,
a backup valve is closed and the controller
activates the brakes of the wheel through an
electric motor driven hydraulic pump. When the
controller goes into a fail-safe mode, the backup
valve is opened, which allows the brakes to be
controlled through a conventional hydraulic
circuit.
For More Information On This Product,
Go to: www.freescale.com