Adaptive cruise control

1. Seminar on
Adaptive Cruise
Control
Presented by: Debaditya Datta
Guided by: Prof. Subham Kundu

2. CONTE
NT
What is Adaptive Cruise Control?
How does an Adaptive Cruise Control work?
Physical overview
Normal Cruise Control Vs Adaptive Cruise Control
Components of an Adaptive Cruise Control
Control system interfaces
Advantages
Disadvantages
Conclusion

3. What is
Adaptive Cruise
Control?

4. Adaptive Cruise Control is an automotive
feature that allows a vehicle’s cruise
control system to adapt the vehicle
speed to the traffic environment. A radar
system attached to the front of the
vehicle is used to detect whether slower
moving vehicles are in the ACC vehicle’s
path.
Introduced in 1970’s in the USA. This
system is now available in luxury cars like
Mercedes S-class, Jaguar XJ, Volvo Trucks
etc.

5. 1958 Chrysler Imperial

6. How does an Adaptive Cruise Control work?

8. Physical
Overview

9. Normal cruise control Vs Adaptive cruise control
 Basic cruise control - such as has been around in cars for
many decades allows you to set a speed for the car to
drive - and that’s the speed it’ll drive come-what-may until
you tell it to drive at a different speed or take over.
 Adaptive cruise control - which has become available in
quite a few cars over the past half dozen years does
essentially the same thing - except that (at a minimum) it
can slow down to maintain a safe distance from the car in
front. Typically, there is some kind of radar unit that
measures the distance to the car ahead of you - and if it’s
less than some certain distance, the cruise control slows
down until that distance is achieved again. Once there is
no car within that distance, it’ll speed up again until it
reaches whatever speed you set for it.

10. COMPONENTS
OF AN ACC
SYSTEM:-
• ACC Module: The primary function of the ACC
Module is to process the radar information and
determine if a forward vehicle is present.
• Engine Control Module: The primary function of the
Engine control module is to receive information
from the ACC Module and Instrument cluster and
control the vehicle’s speed based on the
information.
• Brake Control Module: The primary function of the
Brake Control Module is to check the speed of the
vehicle via each wheel and deaccelerate the vehicle
as and when requested by the ACC Module.
• Instrument Cluster: The primary function of the
Instrument Cluster is to process the Cruise switches
and send this information to the ACC and Engine
Control Module.

11.  CAN: The Controller Area Network is an automotive standard network that utilizes a 2-wire bus to
transmit and receive data. Each node on the network has the capability to transmit 0 to 8 bytes of data
in a single message frame
 Brake Switches: There are two brake switches, Brake Switch 1 (BS1) and Brake Switch 2 (BS2). When
either of the brake switches is activated the ACC system is deactivated or it enters a standby state.
 Brake Lights: When the Brake Control Module applies the brake in request to an ACC request it will
illuminate the brake lights to warn the vehicles behind the ACC vehicle that the car is deaccelerating.

13. Sensors are of four
types:
• LIDAR (Light Detection
and Ranging)
• RADAR (Radio Detection
and Ranging)
• Vision Sensor
• Ultrasonic Sensor

16. Advantages:-
The driver is relieved from the task of careful
acceleration , deacceleration and braking in
congested traffics.
A highly responsive traffic system that adjusts
itself to avoid accidents can be developed.
Since the acceleration and braking are done in
a systematic way the fuel efficiency of the
vehicle is increased.

17. Disadvantages
A cheap version is not yet to be released.
A high market penetration is required if a society of
intelligent vehicles is to be formed.
Encourages the driver to become careless. It can lead
to severe accidents if the system is malfunctioning.
The ACC system yet evolved enable vehicles to
cooperate with each other and hence do not directly
respond to traffic signals .

18. CONCLUSION:-
The accidents caused by automobiles are injuring lakhs of people every year .
The safety measures starting from air bags and seat belts have now reached
to ACC,SACC and CACC systems . The researchers of intelligent vehicles in
USA and Ertico program of Europe are working on the technologies that
may ultimately lead to Vehicles that are wrapped in a cocoon of sensors with
a 360 view of their surroundings. It will probably take decades, but car
accidents may eventually become as rare as plane accidents are now , even
though the road laws have to be changed , up to an extent since the non
human part of the vehicle controlling will become predominant.