ESC Operation Mode

STEP 1
The ESC analyzes the intention of the driver.

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STEP 2
It analyzes the movement of the ESC vehicle.

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STEP 3
The HECU calculates the required strategy, then actuates the appropriate valves and sets torque control requests via CAN to maintain vehicle stability.

ESC Non-operation-Normal braking.

	Inlet valve (IV)	Outlet valve (OV)	Traction Control Valve (TCV)	High pressure switch valve (HSV)	Return pump
Normal braking	Open	Close	Open	Close	OFF

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NOTE: IV: Inlet Valve
OV: Outlet Valve
RL: Rear left wheel
FR: Front right wheel
FL: Front left wheel
RR: Rear right wheel
RP: Return pump
TCV: Traction Control Valve
HSV: High pressure Switch Valve

ESC Increase Mode

	Inlet valve (IV)	Outlet valve (OV)	Traction Control Valve (TCV)	High pressure switch valve (HSV)	Return pump
Normal braking	Open	Close	Close (Partial)	Open	ON (Motor speed control)

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NOTE: IV: Inlet Valve
OV: Outlet Valve
RL: Rear left wheel
FR: Front right wheel
FL: Front left wheel
RR: Rear right wheel
RP: Return pump
TCV: Traction Control Valve
HSV: High pressure Switch Valve

ESC Hold Mode (FR is only controlled.)

	Inlet valve (IV)	Outlet valve (OV)	Traction Control Valve (TCV)	High pressure switch valve (HSV)	Return pump
Normal braking	Close	Close	Close (Partial)	Open	OFF

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NOTE: IV: Inlet Valve
OV: Outlet Valve
RL: Rear left wheel
FR: Front right wheel
FL: Front left wheel
RR: Rear right wheel
RP: Return pump
TCV: Traction Control Valve
HSV: High pressure Switch Valve

ESC Decrease Mode (FR is only controlled)

	Inlet valve (IV)	Outlet valve (OV)	Traction Control Valve (TCV)	High pressure switch valve (HSV)	Return pump
Normal braking	Close	Open	Close (Partial)	Open	ON (Motor speed low control)

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NOTE: IV: Inlet Valve
OV: Outlet Valve
RL: Rear left wheel
FR: Front right wheel
FL: Front left wheel
RR: Rear right wheel
RP: Return pump
TCV: Traction Control Valve
HSV: High pressure Switch Valve

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