PROBLEM TO BE SOLVED: To detect presence/absence of air in a detection target section by comparing a supply amount of a working fluid from an accumulator to the detection target section with a consumption fluid amount determined by a hydraulic pressure increase state of the detection target section.SOLUTION: A servo hydraulic pressure is increased by supplying a working fluid from an accumulator to a regulator. In a period until the servo hydraulic pressure reaches a set pressure Psth from an atmospheric pressure (S8 to S10), if an accumulator pressure lowers from Pacc1 to Pacc2 (S6, S11), then a supply fluid amount ΔQa that is a fluid amount of the working fluid supplied from the accumulator is acquired (S13), a consumption fluid amount ΔQb that is a fluid amount of the working fluid consumed in a detection target section such as the regulator or a back chamber (S14), and the supply fluid amount ΔQa is compared with the consumption fluid amount ΔQb (S15). If a value obtained by subtracting the consumption fluid amount ΔQb from the supply fluid amount ΔQa is greater than a set value α, it is determined that air is present (S16). If the value is equal to or smaller than the set value α, it is determined that air is absent (S17).
【課題】アキュムレータから被検出部への作動液の供給液量と被検出部の液圧の増加状態で決まる消費液量との比較により、被検出部のエアの有無を検出する。【解決手段】アキュムレータからレギュレータに作動液が供給されることにより、サーボ液圧が増加させられる。サーボ液圧が大気圧から設定圧Psthに達するまでの間(S8〜S10)に、アキュムレータ圧がPacc1からPacc2に低下した場合(S6,11)において、アキュムレータから供給された作動液の液量である供給液量ΔQaが取得され(S13)、レギュレータ、背面室等の被検出部において消費された作動液の液量である消費液量ΔQbが取得され(S14)、供給液量ΔQaと消費液量ΔQbとが比較される(S15)。供給液量ΔQaから消費液量ΔQbを引いた値が設定値αより大きい場合には、エアが有ると判定され(S16)、設定値α以下である場合には、エアが無いと判定される(S17)。【選択図】図3
HYDRAULIC BRAKE SYSTEM AND AIR PRESENCE/ABSENCE DETECTION METHOD
液圧ブレーキシステムおよびエア有無検出方法
2015-08-24
Patent
Elektronische Ressource
Japanisch
IPC: | B60T Bremsanlagen für Fahrzeuge oder Teile davon , VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF |
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