Hyundai Tucson: Tailgate Position And Direction

Description

Power tailgate is an electro-mechanical system designed to provide power opening and closing of the tailgate through the push of a button of a remote key (fob), console switch, inner switch or an outside handle switch of the tailgate.

The power tailgate will reverse direction of travel if resistance to movement is detected while the tailgate is being opened or closed.

Tailgate Position And Direction

The PTG system will measure the Tailgate position via an integrated hall sensor inside the Spindle drive unit motor.

The moving direction of tailgate will be detected by analyzing the direction of the drive unit motor.

The hall sensor pulse counting (position detection) is active during power and manual operation mode.

System Components

1. PTG Unit

PTG unit is located in rear left luggage side trim.

PTG drive unit drive the two actuators (Spindles) by measuring the driving motors.

PTG unit also controls anti trap functions by hall sensor analysis in the anti-pinch strip.

2. PTG Latch Assembly

Power latch is located in the lower part of tail gate panel.

3. PTG Spindle

PTG spindle open and close the tailgate by driving the motor.

4. SMK (Smart key)

Push the power tailgate open of the SMK more than 0.5s to open the power tailgate. Power Open operation shall be reversed when an additional Open/Close signal is received during power opening.

5. Tailgate inner switch

6. Tailgate buzzer

When a power operation cannot be performed as requested or an obstacle has been detected.

Operation

Power Tailgate Opening

** - Primary switch signal received by PTGM via CAN bus (sent by SJB)

PTGM Opening procedure:

1. Opening can be triggered after a signal is received from, driver-console switch, outside handle switch, remote Key (FOB)
2. The latch will be released (by SJB) by actuation of latch motor.
3. On latch release, the tailgate latch pops out of the striker.
4. PTG module controls the tailgate motor in order to open the tailgate.
5. The rotating speed of the tailgate motor can be hall sensor that is built in the motor.
6. Opening angle of the tailgate is calculated by counting the input pulse signals from Hall sensor.

When the motor movement is restricted, the PTGM stops the tailgate motor movement due to obstacle detection.

Power Tailgate Closing

PTGM Closing procedure:

1. Closing can be triggered after receiving a signal from, console (driver) switch, ouside handle switch, remote key (FOB), inner switch
2. PTG module controls the tailgate motor in order to close the tailgate
3. Closing angle of the tailgate is calculated by counting the input pulse signlas from hall sensor
4. The rotating speed of the tailgate motor can be hall sensor that is built in the motor
5. The tailgate latch engages with the striker and the latch is locked mechanically (Latch unlock -- Latch lock)
6. PTGM stops the tailgate motor operation after detecting the tailgate latch's secondary signal
7. On detecting the latch's secondary signal, the power close unit (PCU) starts the contract (cinch) operation and stops after the latch lock signal is detected
8. After contract operation is stopped, PCU is rewound until the PCU home position is reached
9. The tailgate is completely closed and latch is fully locked

Learned/Calculated Programmed positions

1. Maximum Point for Opening

Above this position a start in opening direction could make the tailgate move beyond the Maximum Basic Position and overload the mechanical system (hinges).

Therefore the start of an opening action above this point is disabled.

Anyway the tailgate moves beyond this point, if it has been started at a lower position.

2. Learned Mechanical End Position

This is the mechanical block position while opening and is considered to be 100% opening. During the first tailgate opening this position is learned.

After learning, the tailgate will not move beyond the Maximum Basic Position, which is defined by the Learned Mechanical Position - Security Distance.

All positions are defined by parameters in the ECU or programmed by the user (Basic Programmed Position)

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