Kia Sportage: Parking Brake System / Electric Parking Brake (EPB) Description and operation
Description of EPB
The EPB is an electronic parking brake. The EPB is different from existing parking
systems which operated with the brake pedal or the lever type. The EPB system
sends the signal to the ECU when a driver operates the EPB switch. The ECU operates
the EPB actuator composed with motor gears. EPB has several functions.
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Emergency braking function by hydraulic brake malfunction
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| 1. |
Switch Operation at Stationary Condition (Static Park)
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Manually engage the parking brake by operating the EPB switch
at stationary condition.
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With the ignition switch ON, the parking brake is engaged by
the Reduced Clamp Force at less than 8% of slope
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Except for the above, it is always engaged by the Full Clamp
Force.
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| 2. |
Switch Release at Stationary Condition (Static Release)
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Release the parking brake by manually operating the EPB switch
at stationary condition.
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To secure safety, it is only released with ignition switch ON
and the brake pedal pressed.
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| 3. |
Dynamic Emergency Braking (Dynamic Braking)
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Electric Controlled Deceleration (ECD)
: When operating the EPB switch while driving, the operation
request is sent to VDC only during the switch operation, in
order to perform hydraulic braking by the VDC, not by the EPB
actuator.
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Rear Wheel Unlocker (RWU)
: If the VDC is not normally operated (VDC Fail) by operating
the EPB switch while driving and wheel speed information can
be obtained, the EPB actuator will independently maintain the
vehicle's movement safely to perform braking only during the
switch operation.
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| – |
Slow Ramp Up (SRU):
If the VDC is not normally operated (VDC Fail) by operating
the EPB switch while driving and wheel speed information cannot
be obtained, the EPB will independently increase the parking
force gradually to perform braking only during the switch operation.
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| 4. |
Automatic Application of EPB Force (Auto Apply)
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Stop the vehicle with the Auto Vehicle Hold (AVH) switch ON,
and then the EPB will be automatically applied when turning
off the engine.
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| 5. |
Automatic Release of EPB Force (Drive Away Release)
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The parking brake will be automatically released when pressing
the accelerator pedal with the EPB engaged.
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| – |
To secure safety for automatic release, it will be automatically
released only when all of the following conditions are met:
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| 3) |
Door, trunk and hood closed
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To prevent the vehicle from being moved downwards on a slope
way, it will be automatically released only when driving torque
above specific level based on the slope has been obtained.
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| 6. |
Reapplication of EPB Force When Vehicle Moves Downwards (Roll Away Reclamp)
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Additional EPB force is generated when a downward vehicle movement
is detected after applying EPB force.
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With the engine OFF, this function is enabled only while the
wheel speed information can be received (i.e., for 3 minutes
after the engine is turned off).
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| 7. |
P to X (Automatic Release of EPB Force for Gear Shifting)
When moving the gearshift lever from the P or N position to the D or
R position, the parking brake will be automatically released.
However, it will be possible only with the engine ON and the brake pedal
pressed, in order to secure safety for automatic release.
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| 8. |
Auto Hold
Auto hold helps keep vehicle in a stop condition by applying hydraulic
brake at a stop.
| (1) |
Condition for operation
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The driver's side door / Hood / Trunk should be closed.
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Fastening driver seat belt
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A gear shift is not P-range
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Perfect stop condition with hitting the brake pedal.
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| (2) |
(2) Auto hold function holds stop condition of the vehicle for
maximum 10 minutes.
ESP valve keeps stop condition because of intercept the oil
passage with pressure occurred from brake pedal.
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| (3) |
(3) An accumulated time of auto hold operation : Max. 30min
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| (4) |
(4) Automatic release function
Auto hold mode is released when driver starts to accelerate
the vehicle by depressing pedal when in D/ S/ R gear range.
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| (5) |
(5) Automatically convert auto hold to EPB
Auto hold will convert EPB operation automatically if any one
satisfy conditions below.
[Normal conversion case]
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In the case of driver door open & Driver seat belt release
at the same time
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In the case of opening the hood while the shift lever
is D or S.
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In the case of opening the trunk while the shift lever
is R
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In the case of over 10 minutes of auto hold operation
time
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Stop at a slope of twenty five degrees
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[Abnormal conversion case]
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When sensing detailed motion of the vehicle.
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When sensing the fault of ESP hydraulic system.
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| 1. |
EPB warning lamp
EPB warning lamp indicates the EPB cut and malfunction.
EPB warning lamp comes ON below cases.
| (1) |
EPB warning lamp comes on for 3 seconds after the ignition switch
is ON. If EPB system is working properly, EPB warning lamp goes
OFF
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| (2) |
If EPB system is not working properly, EPB warning lamp comes
ON
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| (3) |
Under diagnosis mode, EPB warning lamp comes ON
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| 2. |
2. AUTO HOLD lamp / AUTO HOLD function lamp
| (1) |
AUTO HOLD switch ON
A. Brake system operates automatically when vehicle speed is
“0”, in the case of parking or waiting at a red light, during
braking (AUTO HOLD function lamp : Green)
B. Brake system is released automatically when step on the accelerator
pedal. (AITO HOLD lamp : White)
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| (2) |
AUTO HOLD switch OFF : AUTO HOLD function does not operate.
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Removal
•
The parking brake cables must not be bent or distorted. This
will le ...
Components
1. ESP(Electronic Stability Program)
Control module
2. EPB switch
3. Electronic Parking Brake (EPB)
Actuator
...
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