Cruise control automatically controls the speed of a motor vehicle to maintain a steady speed set by the driver. It was invented in 1948 by Ralph Teetor to maintain consistent speeds and reduce driver fatigue. Modern systems use sensors and electronic throttle control to set and regulate speed based on factors like the speed of preceding vehicles or posted speed limits. Adaptive cruise control systems provide additional safety benefits by automatically slowing the vehicle when approaching slower traffic.

4. CRUISE CONTROL

5. In front of you
HASEEB KM
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6. What it means?
 Known as speed control or auto cruise, or tempomat in some countries.
 Automatically controls the speed of a motor vehicle.
 System is a servomechanism.
 To maintain a steady speed as set by the driver.

7. Behind.. RALPH TEETOR
Modern cruise control (also known as a speedostat
or tempomat) was invented in 1948 by the inventor
and mechanical engineer Ralph Teetor. His idea was
born out of the frustration of riding in a car driven
by his lawyer, who kept speeding up and slowing
down as he talked.

8. How to use…
 The driver must bring the vehicle up to speed manually and use a button to
set the cruise control to the current speed.
 The cruise control takes its speed signal from a
rotating driveshaft, speedometer cable, wheel speed sensor from the
engine's RPM. (at present via ecm)
 Most systems do not allow the use of the cruise control below a certain
speed.(40km/h)
 The vehicle will maintain the desired speed by pulling the throttle cable with
a solenoid, a vacuum driven servomechanism, or by using the electronic
systems built into the vehicle (fully electronic) if it uses a 'drive-by-wire'
system.

9.  Cruise controlling stops when the driver depresses the brakes as well as
clutch.
 Cruise control often includes a memory feature to resume the set speed after
braking.
 We can reduce the set speed.
 When the cruise control is engaged, the throttle can still be used to
accelerate the car, but once the pedal is released the car will then slow down
until it reaches the previously set speed.
 On the latest vehicles fitted with electronic throttle control, cruise control
can be easily integrated into the vehicle's engine management system.
Modern "adaptive" systems (see below) include the ability to automatically
reduce speed when the distance to a car in front, or the speed limit,
decreases. This is an advantage for those driving in unfamiliar areas.

10.  The cruise control systems of some vehicles incorporate a "speed limiter"
function, which will not allow the vehicle to accelerate beyond a pre-set
maximum.
 On vehicles with a manual transmission, cruise control is less flexible because
the act of depressing the clutch pedal and shifting gears usually disengages
the cruise control.
 The "resume" feature has to be used each time after selecting the new gear
and releasing the clutch.
 Therefore, cruise control is of most benefit at motorway/highway speeds
when top gear is used virtually all the time.

11. Working
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16. Advantages
 Its usefulness for long drives (reducing driver fatigue, improving comfort
by allowing positioning changes more safely) across highways and sparsely
populated roads.
 Some drivers use it to avoid subconsciously violating speed limits. A driver
who otherwise tends to subconsciously increase speed over the course of
a highway journey may avoid speeding.
 Increases fuel efficiency.
 There are few things as frustrating to a driver – and their fleet manager –
as getting a speeding ticket. Cruise control, of course, allows the vehicle
to stick to a prescribed speed, eliminating the risk of incurring such a
fine.
 Decrease of harmful emissions.

17. Disadvantages
 Speeding around curves that require slowing down
 Rough or loose terrain that could negatively affect the cruise control
controls
 Rainy or wet weather could lose traction
 Cruise control can also take your mind off the road.
 The driver may not be able to respond as swiftly and effectively to an
emergency situation.

19. About
 Some modern vehicles have adaptive cruise control (ACC) systems, which is
a general term meaning improved cruise control.
 It can be automatic braking or dynamic set-speed type controls.
 The automatic braking type use either a radar or laser setup to allow the
vehicle to keep pace with the car it is following, slow when closing in on the
vehicle in front and accelerating again to the preset speed when traffic
allows.
 Some systems also feature forward collision warning systems, which warns the
driver if a vehicle in front—given the speed of both vehicles—gets too close.
 The dynamic set speed uses the GPS position of speed limit signs, from a
database.

21. Key features
 Advanced version
 Keep at steady speed
 Using sensors for detection
 Keeps safe distance
 Intelligence control
 Collision avoidance system
 Change gear automatically
 Function properly in poor weather condition
 Cannot pick up non-moving objects
 Effective in the speed between 30km-180km/h

22. Types
 Radar-Based System
–- Three overlapping radar-beams (76-77kHz)
-- Detects moving object up to 120 m
–- work in poor weather conditions
 Laser-Based System (lidar)
–- less expensive and easier to package
–-light beams are narrower than water droplet and
snowflakes

23. Radar-based Adaptive Cruise Control

24. Collision warning with brake support

25. Working of ACC

27. Features…
 Maintains a safe, comfortable distance between vehicles
without driver interventions.
 Maintains a consistent performance in poor visibility
conditions.
 Maintains a continuous performance during road turns and
elevation changes.
 Alerts driver by way of automatic braking.

28. Advantages
 Useful for long driving
 The driver is relieved from task of driving. Up to(90%)
 Can avoid violating speeds
 Reduction in accident rate.
 Reduction in driver fatigue.
 Increased fuel efficiency.

29. Disadvantages
 Cost
 Not for heavy traffic
 Dangerous in slippery roads
 Encourages the driver to become careless
 Do not respond to traffic signals.

30. 10 affordable cars in India with cruise
control
 Maruti Suzuki Vitara Brezza
 Honda city
 Volkswagen Polo GT
 Mahindra Scorpio
 Volkswagen Ameo
 Maruti Suzuki Baleno
 Maruti Suzuki S-Cross
 Mahindra XUV5OO
 Renault Duster
 Fiat Linea
And much
more

31. By concluding…
 Current system ranges 150m can stops and slows if any
obstruction
 Fully autonomous car is probably not viable in the
foreseen future
 Near by vehicles would be in constant communication
with each other and act cooperatively.
 It will probably take decades, but car accidents may
eventually becomes almost as rare as plane crashes as
now.

32. THANKS…
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