BMCA 4663

AUTOTRONICS

(VEHICLE CONTROL SYSTEM)

Lecture: Dr. Khisbullah Hudha

Tutorial: En. Mohd. Hanif Harun

Course Content• Chapter 1: Introduction to Vehicle Control System (1)• Chapter 2: Active Front Wheel Steer System (AFS) (1)

Chapter 3: Antilock Braking System (ABS) & MR Brake (2)• Chapter 4: CVT Control (1)• Chapter 5: Active Four Wheel Steer System (4WS) (1)• Chapter 6: Active & Semi Active Suspension System (2)• Chapter 7: Active Roll Control Suspension System (ARC) (2)• Chapter 8: Active Engine Mounting System (1)• Chapter 9: Adaptive Cruise Control (ACC) (1)• Chapter 10: Vehicle to Vehicle (V2V) Communication (1)

Laboratory Works

• Sensor Installation & Control Command Programming

• Pneumatically Actuated Active Suspension System on a Quarter Car Test Rig

• Modeling and Validation of MR Brake System

COURSE IMPLEMENTATION

• LECTURE: 2 HOURS PER WEEK FOR 14 WEEKS

• TUTORIALS: 3 HOURS PER WEEK FOR 8 WEEKS

• LAB: 3 HOURS PER WEEK FOR 3 WEEKS

• ASSIGNMENTS: 3 HOURS PER WEEK FOR 3 WEEKS

COURSE EVALUATION

• MID TEST: 15%

• FINAL TEST: 50%

• QUIZ (2X): 10%

• ASSIGNMENTS (3X): 10%

• PROJECT: 15%

REFERENCES

• RAJAMANI, R. (2005). VEHICLE DYNAMICS AND

CONTROL. SPRINGER.(can be downloaded at the following URL: http://enlightenments.wordpress.com/2009/01/05/automotive-control-system/)

• Kiencke, U. and Nielsen, L. (2004). Automotive Control System. Springer Verlag: New York, LLC.

Chapter 1Introduction to Vehicle Control

System

AUTOMOTIVE TECHNOLOGY ROADMAP

ABS

• ABS is an acronym for anti-lock braking system. First developed and patented in 1936, ABS is actually derived from the German term "antiblockiersystem."

• Anti-lock brakes are designed to prevent skidding and help drivers maintain steering control during an emergency stopping situation.

• In cars equipped with conventional brakes, the driver pumps the brakes, whereas in cars equipped with four-wheel ABS, the driver keeps a firm foot on the brake, allowing the system to rapidly and automatically pump the brakes.

Traction Control

• Traction Control is used to prevent the drive wheels from losing grip when accelerating.

• Traction control is an enhancement of ABS that can also be used to balance the traction torques in all drive wheels

What is the difference between ABS & Traction Control?

• ABS

manage the grip of the tires for braking maneuver

• Traction Control

manage the grip of the tires for accelerating maneuver

Vehicle Stability Control (VSC)

• VSC = ABS + Traction Control + Yaw Control

• VSC is able to prevent a car from sliding sideways

Brake Assist

• Brake Assist is a generic term for an automobile braking technology that increases braking pressure in an emergency situation.

• The brake assist system identify the state of ‘emergency’

of a road vehicle by using brake pedal force.

ARC

• Vehicles lean when cornering due to the weight transfer imposed by lateral acceleration acting on the suspension. Factors contributing to the roll angle of the vehicle include vehicle height and suspension stiffness.

• ARC system uses hydraulic/pneumatic and electronic technology to reduce or eliminate the vehicle roll angle in cornering, which improves handling. This improvement to vehicle handling can help reduce rollover risk.

ARC System

Adaptive Cruise Control

Adaptive Cruise Control (ACC) technology automatically adjust the vehicle speed and distance to that of a target vehicle. ACC uses a long range radar sensor to detect a target vehicle up to 200 meters in front and automatically adjusts the ACC vehicle speed and gap accordingly.

ACC automatically decelerates or accelerates the vehicle according to the desired speed and distance settings established by the driver. As per standard cruise control the driver can override the system at any time.

Active Body Control

• Active Suspension

- Hydraulic

- Pneumatic

• Semi-Active Suspension

- Variable orifice

- MR fluid

X-by Wire

• X-by wire: replace mechanical system in automobile with electrical system for faster response, easier to control and lighter vehicle total weight

• The most common x-by-wire technology available in the market are brake by wire & steer by wire

Collision Avoidance Technology

• All the automotive technologies mentioned previously are considered as collision avoidance technologies

• Ongoing / Latest research on collision avoidance:

Active bumper system, active hood lift system, vehicle to vehicle communication, etc.