VEHICULAR BRAKING DEVICE

To provide a vehicular braking device that can detect fluid leakage of a reservoir with good accuracy.SOLUTION: A vehicular braking device according to the present invention comprises a first system 12 and a second system 14 as fluid supply parts that supply fluid to a wheel cylinder 94 utilizing th...

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Hauptverfasser: YABUSAKI NAOKI, ONODERA TEPPEI
Format: Patent
Sprache:eng ; jpn
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Beschreibung
Zusammenfassung:To provide a vehicular braking device that can detect fluid leakage of a reservoir with good accuracy.SOLUTION: A vehicular braking device according to the present invention comprises a first system 12 and a second system 14 as fluid supply parts that supply fluid to a wheel cylinder 94 utilizing the fluid in a reservoir 20, which generates braking force in wheels by making a piston 95 press a brake pad 93 against a disc rotor 91 in accordance with wheel pressure. The device further comprises: a fluid level sensor 20a that measures a value of a fluid level of the fluid in the reservoir 20; a wear amount estimating part 81 that estimates wear amounts of the brake pad 93, on the basis of a measured result by the fluid level sensor 20a; a heat generation-amount estimating part 82 that estimates heat generation-amounts of the brake pad 93, on the basis of the measured result by the fluid level sensor 20a; and a fluid leakage determining part 84 that determines whether fluid leakage occurs or not, on the basis of variations of the fluid level, the wear amounts and the heat generation amounts.SELECTED DRAWING: Figure 3 【課題】リザーバの液漏れを精度良く検出することができる車両用制動装置を提供する。【解決手段】本発明は、リザーバ20内のフルードを利用してホイールシリンダ94にフルードを供給するフルード供給部としての第1システム12及び第2システム14を備え、ホイール圧に応じてピストン95がブレーキパッド93をディスクロータ91に押し付けることで車輪に制動力を発生させる車両用制動装置であって、リザーバ20内のフルードの液面レベルの値を計測する液面レベルセンサ20aと、液面レベルセンサ20aの計測結果に基づいて、ブレーキパッド93の摩耗量を推定する摩耗量推定部81と、液面レベルセンサ20aの計測結果に基づいて、ブレーキパッド93の発熱量を推定する発熱量推定部82と、液面レベルの変化量、摩耗量、及び発熱量に基づいて、液漏れが発生しているか否かを判定する液漏れ判定部84と、を備える。【選択図】図3