6.4.2 Description and Operation
6.4.2.1 Description and Operation
Hydraulic braking system includes the following
components:
Brake Pedal:Receives, amplifies and transmits braking system
input from the driver.
Brake Pedal Putter:Transmits amplified brake pedal input force
into the vacuum booster.
Vacuum Booster:Braking system input force is amplified
through the brake pedal and passed to the vacuum booster,
boosted by the vacuum brake booster and then transmitted to
the master cylinder. Vacuum booster boosts the braking force
by vacuum to help reduce the driver braking effort.
Vacuum Hose:Used for transmission of the vacuum booster
required vacuum source.
Brake Master Cylinder Tank:Filled with the hydraulic brake fluid
used by the system.
Brake Master Cylinder:Converts the mechanical input to
hydraulic output pressure. Hydraulic pressure from the master
cylinder output assigned to the two hydraulic fluid channels,
providing braking fluid pressure to diagonal wheels.
Hard brake pipe and brake hose:Pass brake fluid flow to
hydraulic brake system components.
Brake Wheel Cylinder:Converts the hydraulic input pressure to
mechanical output force.
System Operation
The mechanical force from the brake pedal is converted to fluid
pressure by the master cylinder, through the hydraulic
electronic control unit (ie HECU) , and through the brake pipes
and hoses transferred to the braking cylinder. Brake Cylinder
then converts the hydraulic pressure to the mechanical force.
So the brake pad presses the brake disc to achieve the vehicle
braking.
Brake Fluid Level Low Warning Lamp
Instrument cluster detects the low brake fluid level (signal
circuit low voltage), and lights up the brake fluid level low
warning lamp.
6-30
Hydraulic Brake
Brake System
EC718/EC718RV EC715/EC715RV 10/2009
Summary of Contents for EC715 2009
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