The document discusses park assist and crash assist systems for vehicles. It describes the components of a park pilot assist system, which uses ultrasonic sensors and an ECU to calculate distances to obstacles and help guide reversing. It also covers two pre-crash assist systems: a collision mitigation braking system that predicts rear-end collisions and applies brakes; and a predictive emergency braking system that uses sensors like steering angle and wheel speed to detect when emergency braking is needed and assist the driver.

1. PARK PILOT ASSIST SYSTEM AND
CRASH ASSIST SYSTEMS
Presented by
MUTHU KUMAR .B
CB.EN.P2EBS10012
Department of EEE

2. INTRODUCTION
• The all-sophisticated automation and electronics & sensors combination
virtually make us a hi-fi driver. But how it matters when we enter a parking slot
full of bumps and ramps?
• The driver can manage the front façade view but what about the rear
escapades. That’s where Park Pilot Assist System comes into play.

3. COMPONENTS IN PARK ASSIST
Park Pilot assist system has a compact design and is composed of
1. ECU Control Module
2. Sensor main harness
3. Power/Mute Harness
4. Alarm
5. Hazard Mute Module
6. Hardware Package
7. Operational manual

4. BLOCK DIAGRAM

5. PRINCIPLE
• The sensors are triggered to emit an ultrasonic signal with a frequency of
40 kHz and the sensor then snaps to reception to pick up the sound waves
echoed off the object.
• In between emitting the signal and receiving the reflection, the system
calculates the distance between the sensor and the obstacle.

11. CRASH ASSIST SYSTEMS
POST CRASH ASSIST
1. E-Call assist
PRE CRASH ASSIST
1. Collision mitigation break system
2. Predictive emergency braking system

12. COLLISION MITIGATION BREAK SYSTEM (CMS)
• CMS is the world's first Collision Mitigation Brake System (CMS). The
technology predicts rear-end collisions and assists brake operation to reduce
the impact.
• Distance to the vehicle ahead and relative speeds are calculated.
• It then prompts the driver to take preventative action.

13. WORKING
• First, the radar measures the distance between the car and other vehicles up
to 100 meters ahead and any differences in speed.
• Onboard computer judges the risk of a collision based on this information
and on data about the course of the car.
• Alerts the driver by sounding an alarm and lighting up a “BRAKE” warning
on the dashboard.
• The system works in conjunction with the "E-Pretensioner" seatbelt
retraction system. If the car continues to get closer to the other vehicle it
tightens the seatbelt more firmly and applies the brakes forcibly and hard.

14. NOTIFICATIONS AND SAFETY
The CMS has three staged modes:
• An audible warning,
• An audible warning, light braking and
light seat-belt retraction.
• An audible warning, strong braking and
strong seat-belt retraction.

17. PREDICTIVE EMERGENCY BRAKING SYSTEM

18. ACTIVATION RANGE OF PEBS

19. WORKING (speed>30Km/h)

20. WORKING (speed<30Km/h)

21. SENSORS USED IN PEBS
• Steering wheel angle sensor: determines the driver's intended rotation
• Yaw rate sensor: measures the rotation rate of the car
• Lateral acceleration sensor: Measures the lateral acceleration of the
vehicle.
• Wheel speed sensor: measures the wheel speed.
• Longitudinal acceleration sensor: Information about road pitch.
Steering wheel sensor
Wheel speed sensor
Lateral acceleration sensor

27. OVERVIEW OF PEBS
Predictive emergency brake assist
PEBS = EBS + ESA Emergency steer assist
Emergency brake assist

28. THANKS !