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As the number of user selectable electrical modules increases for passenger car, the number of cars with different combinations of option can easily exceed 100,000 cars. It results to a situation where we can not manually verify all the logical connection by making wiring combinations for each car. In this paper, we propose an algorithm that can reduce verification time for all possible wiring with available option combinations. The algorithm separates the whole wiring circuits into independent circuits and verifies the logical connections for each independent circuit with all possible options. The algorithm is time effective so the required time to verify the connections increases logarithmically as the number of possible car increases. The algorithm was implemented as software verification tool and its effectiveness was proved to be feasible.

In-Vehicle Network (IVN) protocol such as CAN, MOST, Flexray and etc. have been extensively applied in automotive communication systems. Analyzer development for network diagnoses purpose correspondingly becomes an emerging industry in automotive field. To reduce the increasing software development costs for protocol of various types, reusable analyzer software architecture and standardized system composition mechanism are needed. In this paper, we propose reusable analyzer software architecture, a system integrating mechanism and a component replacing policy. We built the reusable architecture by extracting similarities of different analyzer development. In system integrating phase, components are abstracted so that they can be located, compared and selected by system integrators. And component replacing policy is used to reuse the software for new analyzer development.

In automotive industry, to deal with EMI problems, an efficient and proper screening attenuation measurement method is needed to make high performance and low cost shielded electrical wiring harness. Previously a screening attenuation measurement method titled PHSA (Power Harness screening attenuation) method [ 1 ] was proposed to measure screening attenuation in shielded power cable, which evaluates the shielding performance that prevents radiation from inner core to outside environment. The method was used to practically check the effects on performance of cable shield (shield effectiveness) due to different combinations of length and braid density against radiated noise. But the measurement time for actually performing experimental tests limits measurable combinations to evaluate the shielding performance of the wiring harness.

A module based IPS (Intelligent Power Switch) evaluation system is proposed in this paper. As the IPS is gradually replacing the conventional relay and fuses, the stability and reliability of power system depends more on these IPS. The proposed IPS evaluation system outperforms the conventional manual evaluation in terms of speed and efficiency. This paper will introduce the structure of hardware and software of the IPS evaluation system. The system is placed between the module and cable connector to evaluate the module in an operating car without changing the cables. The control and signal processing is carried out by personal computer which is connected to the evaluation system by USB (Universal Serial Bus). The load resistance can be switch from actual load to arbitrary value using relay circuitry and DC electric load controlled by GPIB (General Purpose Interface Bus). CAN (Controller Area Network) circuits were added to control the IPS mounted inside the module.

Currently Intelligent Power Switch (IPS) is substituting the fuse and relay in automotive electronic systems due to its simplicity in design, assembly, and maintenance as well as its advantages of cost reduction. As the percentage of IPS in automotive power system gets higher, the stability and credibility of the automotive power system depends more by IPS evaluation. Since IPS is semiconductor device, the performance is more influenced by its ambient temperature than replacing fuses and relays. As reliability is one of the most important characteristics in automotive system, wire protection, over-current protection, and short-circuit protection should be considered. The evaluation algorithm of IPS must include these characteristics. This paper describes the algorithm development of effective IPS (Intelligent Power Switch) evaluation software for automotive applications.