2001
Chevrolet Corvette Restoration Kit
Park Brake System Description and Operation
System Component Description
The park brake system consists
of
the following:
Park Brake Lever Assembly
n
Receives, multiplies, and transfers park brake system apply input force from operator to park brake
cable system.
Releases applied park brake system when lever
is
returned to at-rest, lowered, position.
Park Brake
Cables
Transfers input force received from park brake lever, through park brake cable equalizer, to park
brake
apply levers.
Park Brake Cable Equalizer
Evenly
distributes input force to both the left and right park brake units.
Park Brake
Apply Lever
Multiplies and transfers input force to park brake actuator/adjuster.
System Operation
Park brake apply input force
is
received by the park brake lever assembly being applied. The input force
is
multiplied by the lever assembly, transferred, and evenly distributed, through the park brake cables and
the park brake
cable equalizer, to the left and right park brake apply levers. The park brake apply levers
multiply
and transfer the apply input force to the park brake actuators. The park brake lever assembly
releases
an applied park brake system when it
is
returned to the at-rest, lowered, position.
ABS Description and Operation
Antilock Brake System
When wheel slip
is
detected during a brake application, the ABS enters antilock mode. During antilock
braking, hydraulic pressure
in
the individual wheel circuits
is
controlled to prevent any wheel from
slipping. A separate hydraulic line and specific solenoid valves are provided for each wheel. The ABS can
decrease,
hold, or increase hydraulic pressure to each wheel brake. The ABS cannot, however, increase
hydraulic pressure above the amount which
is
transmitted by the master cylinder during braking.
During antilock braking, a series
of
rapid pulsations
is
felt
in
the brake pedal. These pulsations are
caused by the rapid changes
in
position
of
the individual solenoid valves as the EBCM responds to wheel
speed sensor inputs and attempts to prevent wheel slip. These pedal pulsations are present only during
antilock braking and stop when normal braking
is
resumed or when the vehicle comes to a stop. A ticking
or popping noise may
also be heard as the solenoid valves cycle rapidly. During anti lock braking on dry
pavement, intermittent chirping noises may
be
heard as the tires approach slipping. These noises and
pedal pulsations are considered normal during anti lock operation.
Vehicles equipped with
ABS may
be
stopped by applying normal force to the brake pedal. Brake pedal
operation during normal braking
is
no
different than that
of
previous non-ABS systems. Maintaining a
constant force
on
the brake pedal provides the shortest stopping distance while maintaining vehicle
stability.
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