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Brake System - General: Specifications Kia Optima II

SPECIFICATIONS

ItemSpecification
Master cylinder
TypeTandem type
I.D.23.81 mm (0.937 in)
Piston stroke30-31 mm (1.18-1.22 in)
Fluid level warning sensorProvided
Proportioning valve (CBS)
Cut-in pressure (Split point)35 kg/cm 2 (3.43 MPa, 497.8 psi)
Decompression ratio0.32: 1
Brake booster
TypeVacuum
Boosting ratio9: 1
Front brake (Disc)
TypeFloating type with ventilated disc
Disc O.D.280 mm (11.02 in)
Disc I.D.172 mm (6.77 in)
Disc thickness26 mm (1.02 in)
Pad thickness11 mm (0.43 in)
Cylinder typeSingle piston
Cylinder I.D.Ø57.2 mm (2.25 in)
Rear brake (Disc)
TypeFloating type with solid disc
Disc O.D.262 mm (10.31 in)
Disc I.D.185 mm (7.28 in)
Disc thickness10 mm (0.39 in)
Pad thickness10 mm (0.39 in)
Cylinder typeSingle piston
Cylinder I.D.Ø34 mm (1.34 in)
Parking brake
ActuationDIH (Drum in hat)
TypeLever
Drum I.D.168 mm (6.61 in)

GENERAL BRAKE SYSTEM SPECIFICATIONS CHART

Note. ABS: Anti-lock Brake System CBS: Conventional Brake System

SPECIFICATION (ABS)

PartItemStandard valueRemark
HECUSystem4 Channel 4 Sensor (Solenoid)
TypeABS + EBD
Operating Voltage10-16 V
Operating Temperature40-110 °C (-40-230 °F)
Motor power180 W
Warning lampMin. Operating Voltage1.2 V
Max. Current consumption120 mA
Active Wheel speed sensor (ABS)Supply voltageDC 4.5-20 V
Operating Temperature40-150 °C (-40-302 °F)
Output current low5.9-8.4 mATyp. 7 mA
Output current high11.8-16.8 mATyp. 14 mA
Output range1-2500 Hz
Tone wheel48 teeth
Air gap0.3-1.5 mm (0.01-0.06 in)
Output duty30-70 %

ABS SPECIFICATIONS CHART

SPECIFICATION (ESC)

PartItemStandard valueRemark
HECUSystem4 Channel 4 Sensor (Solenoid)Total control (ABS, EBD, TCS, ESC)
TypeMotor, valve relay integrated type
Operating Voltage10-16 V
Operating Temperature40-110 °C (-40-230 °F)
Motor power250 W
Warning lampMin. Operating Voltage1.2 V
Max. Current consumption120 mA
Active Wheel speed sensor (ABS)Supply voltageDC 4.5-20 V
Operating Temperature40-150 °C (-40-302 °F)
Output current low5.9-8.4 mATyp. 7 mA
Output current high11.8-16.8 mATyp. 14 mA
Output range1-2500 Hz
Tone wheel48 teeth
Air gap0.4-1.5 mm
Output duty30-70 %
Steering Wheel Angle SensorOperating Voltage9-16 V
Operating Temperature30-75 °C (-22-167 °F)
Current ConsumptionMax. 100 mA
Output CurrentMax. 10 mA
Operating Angular velocityMax. 1500 °/sec
Yaw rate & Lateral G sensorOperating Voltage4.75-5.25 V
Current ConsumptionMax. 65 mA
Output voltage0.5-4.5 V
Operating Temperature40-85 °C (-40-185 °F)
Yaw rate sensor measurement range+/- 75 °/sec
Lateral G sensor measurement range+/- 1.5 g

ESC SPECIFICATIONS CHART

TIGHTENING TORQUE

ItemNmKgf.m
Proportioning valve to master cylinder34.3-53.93.5-5.5
Master cylinder to booster mounting nut7.9-11.80.8-1.2
Brake booster mounting nut12.7-15.71.3-1.6
Bleeder screw6.9-12.70.7-1.3
Brake tube nut, brake hose12.7-16.61.3-1.7
Caliper guide rod bolt21.6-31.42.2-3.2
Caliper mounting bolt78.5-98.18.0-10.0
Brake hose to front caliper24.5-29.42.5-3.0
Brake pedal member assembly bracket mounting nut (cowl side upper mounting)16.7-25.51.7-2.6
Brake pedal mounting nut24.5-34.32.5-3.5
Stop lamp switch mounting nut7.9-9.80.8-1.0
Wheel speed sensor mounting bolt6.9-9.80.7-1.0
HECU mounting bracket bolt16.7-25.51.7-2.6
HECU union screw11.8-15.71.2-1.6
HECU bracket mounting bolt10.8-13.71.1-1.4
Yaw rate & Lateral G sensor mounting bolt4.9-7.80.5-0.8

TIGHTENING TORQUE SPECIFICATIONS CHART