# US 2013/0158780 A1 · In-vehicle electronic apparatus and diagnostic system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2013/0158780 A1 - Document ID: US20130158780A1 - Status: Published application - Kind: A1 - Application number: 13/719,601 - Filed: 2012-12-19 - Published: 2013-06-20 - Earliest claimed: 2011-12-19 - Assignees: Denso Corporation - Inventors: Takeo UMESAKA; Mikio TERAMURA - Web page: https://patentgrep.com/patent/US20130158780A1 ## CPC - G06F 17/00: Digital computing or data processing equipment or methods, specially adapted for specific functions (information retrieval, database structures or file system structures therefor G06F16/00) - G07C 5/085: {using electronic data carriers} - G07C 5/0825: {using optical means} - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) - G07C: TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE ## Abstract When any one of multiple driving informational parameters has shown a predetermined change in a determination process, an in-vehicle electronic apparatus sets 1 to a change history provided per each driving informational parameter. When the change history of any one of the driving informational parameters is 1 in the storage process, the in-vehicle electronic apparatus determines that any one of the driving informational parameters has shown the predetermined change between the previous process and current process. Then, the in-vehicle electronic apparatus stores a current time as a change time in a corresponding area provided in an RAM to the driving informational parameter that has shown the predetermined change and sets the change history to 0. When the predetermined vehicle behavior occurs, the in-vehicle electronic apparatus stores, in an SRAM or EEPROM, the change time stored in the RAM and an occurrence time when the predetermined vehicle behavior occurs. ## Claims ### Claim 1 An in-vehicle electronic apparatus in a vehicle to store analysis information to analyze causes of predetermined vehicle behaviors, the in-vehicle electronic apparatus comprising: a change determination section that determines whether a plurality of driving informational parameters representing driving states of the vehicle indicate predetermined changes, respectively; a behavior determination section that determines whether a predetermined vehicle behavior occurs; and a storage section that stores, in a storage portion as analysis information, (i) an occurrence time of the predetermined vehicle behavior, which is determined to occur by the behavior determination section, as well as (ii) a change time of the driving informational parameter determined to indicate the predetermined change by the change determination section by the occurrence time of the predetermined vehicle behavior. ### Claim 2 (depends on 1) The in-vehicle electronic apparatus according to claim 1, wherein: the change determination section determines that the driving informational parameter indicates the predetermined change when the driving informational parameter, which is binary data of on and off, switches between on and off or when the driving informational parameter, which is analog data or multiple-valued digital data more than binary data, changes across a predetermined threshold. ### Claim 3 (depends on 2) The in-vehicle electronic apparatus according to claim 2, wherein: the change determination section determines that the driving informational parameter indicates the predetermined change when the driving informational parameter, which is binary data of on and off, switches from one of on and off to an other in one direction or when the driving informational parameter, which is analog data or multiple-valued digital data more than binary data, crosses a predetermined threshold in one direction. ### Claim 4 (depends on 1) The in-vehicle electronic apparatus according to claim 1, wherein: the change determination section determines that the driving informational parameter indicates the predetermined change when the driving informational parameter, which is binary data of on and off, does not change after switching between on and off by one or more determinations or when a change amount of the driving informational parameter, which is analog data or multiple-valued digital data more than binary data, exceeds a predetermined amount. ### Claim 5 (depends on 1) The in-vehicle electronic apparatus according to claim 1, wherein: a determination process by the change determination section and a storage process of the analysis information in the storage portion by the storage section are executed by different processing programs, respectively. ### Claim 6 (depends on 1) The in-vehicle electronic apparatus according to claim 1, wherein: when the change determination section determines that a subject driving informational parameter indicates a predetermined change, the storage section stores a change time of the subject driving informational parameter in the storage portion using an interruption to interrupt a determination process by the change determination section. ### Claim 7 (depends on 1) The in-vehicle electronic apparatus according to claim 1, wherein: the change determination section determines by hardware whether a subject driving informational parameter indicates a predetermined change; and the storage section stores a change time of the subject driving informational parameter in the storage portion using an interruption by hardware when the change determination section determines that the subject driving informational parameter indicates the predetermined change. ### Claim 8 (depends on 1) The in-vehicle electronic apparatus according to claim 1, wherein: the storage section further stores, in the storage portion as the analysis information, an other driving informational parameter related to a subject driving informational parameter determined to indicate a predetermined change by the change determination section, to be associated with a change time when the subject driving informational parameter indicates the predetermined change. ### Claim 9 (depends on 1) The in-vehicle electronic apparatus according to claim 1, wherein: the storage section further stores, in a storage portion as analysis information, in addition to (i) a change time of a subject driving informational parameter determined to indicate a predetermined change by the change determination section by an occurrence time when the behavior determination section determines that the predetermined vehicle behavior occurs, and (ii) the occurrence time of the predetermined vehicle behavior, values of driving informational parameters including the subject driving informational parameter at the occurrence time of the predetermined vehicle behavior. ### Claim 10 (depends on 1) The in-vehicle electronic apparatus according to claim 1, wherein: when the change determination section determines that a subject driving informational parameter indicates a predetermined change after the behavior determination section determines that the predetermined vehicle behavior occurs, the storage section further stores a change time of the subject driving informational parameter after the predetermined vehicle behavior occurs in the storage portion as the analysis information. ### Claim 11 (depends on 1) The in-vehicle electronic apparatus according to claim 1, wherein: the storage section stores, in the storage portion as the analysis information, only a change time of the driving informational parameter determined to indicate the predetermined change by the change determination section. ### Claim 12 (depends on 1) A diagnostic system, comprising: the in-vehicle electronic apparatus according to claim 1; and a diagnostic tool connected to the in-vehicle electronic apparatus, the diagnostic tool including a read section that reads analysis information stored in the storage portion of the in-vehicle electronic apparatus, and an output section that outputs the analysis information read from the storage portion. ### Claim 13 (depends on 12) The diagnosis system according to claim 12, wherein: when driving informational parameters that indicate predetermined changes are stored in the storage portion along with change times to which the driving informational parameters correspond, the output section rearranges the change times in chronological order, and outputs the rearranged change times in the chronological order to be associated with the corresponding driving informational parameters.