Abdulmohsen Mohammed Albelushi
Dhahran Ahlyya School, Dhahran, Eastern, SAUDI ARABIA
The purpose of the Intelligent Safe Road (ISR) project is to device a solution to the increasing number to over-speeding traffic accidents problem. The designed system is based on the hypothesis that if the amount of fuel injected to the car engine is controlled and limited, the limit of car speed can be set to a pre-defined value, therefore, reducing the number of accidents due to over speeding car accidents.
The ISR system works by installing a wireless receiver in the Engine Control Unit (ECU) used in cars. Such receiver will serve as a speed limiting device in cars.
It is known that maximum amount of fuel injected into car engine is controlled by ECU. Therefore, speed of cars is ultimately controlled by the amount of fuel injected in engines.
A speed-limiting transmitter device is installed on the sideway of roads with speed limits such as near hospitals and schools. This device will transmit a radio signal (with information about maximum allowed speed) that covers the neighborhood. Such signal will be received by ISR radio receiver which enables the ECU to limit the amount of fuel injected into car fuel injection system to a value corresponding to the maximum allowed speed.
For testing purposes, a model of ISR system was built using LEGO NXT controller and a gasoline fuel injection system for RC car.
Experiments were done on a model system and results were promising. The concept was proven as the opening of the throttle valve of the RC car engine was found responsive to the speed limit set by a Bluetooth transmitter and receiver.
ISR can be utilized to control the maximum speed for cars to avoid over-speeding accidents. In addition, ISR can be further developed to be utilized by police cars to enforce suspicious vehicles to stop or slow down at check points or for inspection.