[Yaw Rate Output Signal]

Steering angle sensor

Steering sensor signal will be used as the input signal for anti-roll control. The steering sensor uses LED and photo-transistor, and sensor A (ST1) and sensor B (ST2) are installed steering wheel. A Slit plate is installed between the photo-transistor and the LED. The slit plate has 45 holes, so it will rotate when the steering wheel rotates. The photo-transistor operates depending on light that will pass the slit plate holes, and the digital pulse signal is output. ECM will use the signal to figure the steering wheel speed and angle.

Application

- Location: Inside steering wheel

- Calculate the steering amount and direction

- 3 Input Signals (ST 1, ST 2, ST N)

- ST N detects the neutral position of steering wheel

Specification

- Sensor type : Photo interrupt type

- Sensor output type : Open Collector Type

- Output pulse quantity :45pulse (Pulse cycle 8°)

- Duty ratio : 50±10%

- Phase difference of outputs : 2.0 ±0.6°

- Supply voltage :IGN1(9~16V)

- Output voltage :1.3≤V_OL ≤2.0V, 3.0≤V_OH ≤4.1V

- Maximum rotational velocity : 1,500°/s

Operation

There is a hall plate between the photo-controller LED and the photo transistor. As the hole plate rotates with steering wheel rotation, electrical signal will be generated depending on whether the LED light passes through the plate to the photo-transistor or not. The signal is the steering wheel operation angular velocity and used to detect the steering wheel turning direction.

Hi-can data

Pressure sensor

Application

• Sense the driver’s braking intentions (braking while an ESP intervention is in progress)

• Control the precharging pressure

Design

The sensor consists of two ceramic disks, one of which is stationary and the other movable. The distance between these disks changes when pressure is applied.

Installation

The sensors are mounted on the TMC (primary circuit)

Specification

• Operating Voltage: 5± 0.5 V

• Pressure Range: 0 ~ 170 bar

• Maximum Pressure Limit: 350 bar

• Operational Temp. : - 40℃ ~ 125 ℃

• Accuracy: ± 3 %

Function

• The pressure sensors operate on the principle of changing capacitance.

• The distance (s) between the disks and, thus, the capacitance changes when pressure is applied to the movable disk by a braking intervention.

• The characteristic of the sensor is linearized.

• The fluid displacement of the sensor is negligible.

Max. measurable pressure: 170 bar