Inseong Song

The implementation of start stop system with the OBD-II interface in the automotive smart key system

Along with the growing needs for the low energy consumption technology and the strengthening vehicle environmental regulations, the researches on the start stop system, which stops the engine on idle, have been briskly carried out around the automobile makers before the appearance of the alternative energy. In addition, the automobile makers are trying to popularize the start stop system by combining the system to the generalized smart key system to not only arouse purchasing but also provide the convenience and reduce the energy consumption as well. In this paper, we designed and implemented the start stop system algorithm for the aftermarket smart key system which uses the OBD-II interface. The implemented start stop system is capable of controlling two independent systems, both an eco-friendly start stop system and a convenient smart key system, on a single ECU. Furthermore, the implemented start sop system standardizes the interface with the vehicles to reduce the time required for installing the start stop system to the various vehicles, and satisfies every standard response time limit for the vehicle status request signals.

Task Scheduling Algorithm with Minimal Redundant Duplications in Homogeneous Multiprocessor System

The performance of a homogeneous multiprocessor system depends on an algorithm which schedules input DAG. Among various task scheduling algorithms, ones that are using full duplication provide superior performance by duplicating tasks recursively. However, redundant duplications lead to increase of total execution time and decrease of processor idle time. In this paper, we propose GDRA which reduces total execution time and increases processor idle time by eliminating redundant duplications. Comparisons with other full duplication algorithms, such as CPFD, SD, and MDJ, show that GDRA provides the better performance as the CCR increases.

The Design and Implementation of Start Stop System with Multi-Protocol in Automotive Smart Key System

The researches on the start stop system, which stops the engine on idle, have been briskly carried out around the automobile makers before the appearance of the alternative energy along with the growing needs for the low energy consumption technology and the strengthening vehicle environmental regulations. In addition, the automobile makers are trying to make the start stop system general and encourage purchasing by combining the system to the popular smart key system to not only provide the convenience but reduce the energy consumption as well. In this paper, we designed and implemented the start stop system with multi-protocol that is capable of providing both an eco-friendly start stop system and a convenient smart key system on a single electronic control unit. For performance evaluation, we gathered the necessary data with a software tool for monitoring the vehicle’s network, installed the proposed system on a real vehicle, measured the calculated worst case response time of the multi-protocol on the idle state control module, and compared the results with the benchmark data from the society of automotive engineers. The results show that the proposed system satisfies every time restriction that is related with the proposed system.