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Title:
HYDRAULIC BRAKE SYSTEM AND AIR PRESENCE/ABSENCE DETECTION METHOD
Document Type and Number:
Japanese Patent JP2015150970
Kind Code:
A
Abstract:
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).

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Inventors:
NAKADA DAISUKE
KAMIYA YUSUKE
OKANO TAKAHIRO
NINOYU MASAKI
Application Number:
JP2014025279A
Publication Date:
August 24, 2015
Filing Date:
February 13, 2014
Export Citation:
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Assignee:
TOYOTA MOTOR CORP
ADVICS CO LTD
International Classes:
B60T17/22; B60T8/44; B60T11/18; B60T13/12; B60T15/02; B60T17/00
Domestic Patent References:
JP2003301809A2003-10-24
JP2008030545A2008-02-14
JP2013230708A2013-11-14
Attorney, Agent or Firm:
Chubu International Patent Office



 
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