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Development Engine Fault Diagnosis System Therefore, it is expected to contribute to eco industry which has received attention recently. The diagnostic devices provide user-centered diagnostic services and prevents accidents caused due to the engine malfunction by providing real-time communications with the use of wired system and Bluetooth module as a wireless system to transmit and receive engine fault diagnosis signals and sensor output signals and air pollution such as excessive gas exhaust and emission of incomplete combustion gas by controlling to operate an engine under the optimal conditions through the knocking diagnosis. This study suggested an appropriate protocol for the developed ECU with the application of OBD-II standard in order to collect data values of the developed ECU and developed user-centered diagnostic devices for a mobile by receiving an input of data through communication after application. In order to solve these problems, this study independently developed ECU dedicated for an industrial CRDI engine. Therefore, with respect to a diagnostic device for engines, it is not easy to use or understand the content without an expert. The program and data parts of this ECU can be changed only by the manufacturer. IntroductionĮCU in CRDI system enables an engine to operate under optimal conditions by analyzing sensor information. Thus, because when troubles take place on the engine, users can check them right away, quick response and resolution are possible, and stable system management can be expected. Because the diagnostic system enables real-time communication through modules, the engine condition information can be checked at any time.
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It transmits 31 pieces of engine condition information simultaneously and sends the trouble diagnostic code. The designed protocol consists of a message structure to request data transmission from a smartphone to ECU and a response message structure for ECU to send data to a smartphone. For the implemented system, a new protocol was designed and applied based on OBD-II standard to receive engine data values of the developed ECU. This study implemented a mobile diagnosing system that provides user-centered interfaces for more precisely estimating and diagnosing engine conditions through communications with the self-developed ECU only for industrial CRDI engine use.
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