PROBLEM TO BE SOLVED: To improve the accuracy of trouble detection of a boosting circuit.SOLUTION: A vehicular power supply voltage control system 10 is equipped with a battery 11; a DC-DC converter 13; a controller 14; and a second voltage sensor 32. The DC-DC converter 13 boosts battery voltage outputted from the battery 11. The second voltage sensor 32 detects boost voltage outputted from the DC-DC converter 13 during boosting. The controller 14 drives the DC-DC converter 13 at the time of starting an internal combustion engine 22 of a vehicle 1 to carry out startup boost control for boosting the battery voltage. The controller 14 carries out first failure determination which determines that the DC-DC converter 13 breaks down if the boost voltage detected by the second voltage sensor 32 is first voltage or less, when the DC-DC converter 13 is driven after turning off an ignition switch 33.SELECTED DRAWING: Figure 1

    【課題】昇圧回路の故障検知の精度を向上させる。【解決手段】車両用電源電圧制御システム10は、バッテリ11、DC−DCコンバータ13、コントローラ14、および第2電圧センサ32を備える。DC−DCコンバータ13は、バッテリ11から出力されるバッテリ電圧を昇圧する。第2電圧センサ32は、DC−DCコンバータ13から昇圧時に出力される昇圧電圧を検出する。コントローラ14は、車両1の内燃機関22の始動時にDC−DCコンバータ13を駆動してバッテリ電圧を昇圧する始動時昇圧制御を行なう。コントローラ14は、イグニッションスイッチ33のオフ後にDC−DCコンバータ13を駆動した場合に、第2電圧センサ32により検出される昇圧電圧が第1電圧以下であればDC−DCコンバータ13が故障していると判定する第1故障判定を行う。【選択図】図1


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    Title :

    VEHICULAR POWER SUPPLY VOLTAGE CONTROL SYSTEM


    Additional title:

    車両用電源電圧制御システム


    Contributors:

    Publication date :

    2016-06-30


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR / F02D CONTROLLING COMBUSTION ENGINES , Steuern oder Regeln von Brennkraftmaschinen / H02M APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS , Anlagen zur Umformung von Wechselstrom in Wechselstrom, von Wechselstrom in Gleichstrom oder umgekehrt, oder von Gleichstrom in Gleichstrom und zur Verwendung in Netzen oder ähnlichen Stromversorgungssystemen



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