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Patent Searching and Data

Document Type and Number:
WIPO Patent Application WO/2017/077941
Kind Code:
Provided is a brake device which is a two-piston type brake device and which reduces drag torque and delays the timing for replacing a friction-pad. The brake device is provided with the following: a brake rotor (3); a friction pad (4) which includes a plurality of pads (4a, 4b); two actuators (2-1, 2-2) which each include a piston (18), in which each piston (18) of the two actuators (2-1, 2-2) corresponds to a different pad from among the plurality of pads (4a, 4b), and which performs driving, using the pistons (18, 18), to cause the friction pad (4) to make contact with and separate from the brake rotor (3); and a control device (5) that controls the two actuators (2-1, 2-2). The control device (5) estimates the wear amount of each of the pads (4a, 4b) which correspond to the pistons (18) of the two actuators (2-1, 2-2), and in accordance with an applied braking command, independently controls each of the two actuators (2-1, 2-2) in accordance with the estimated wear amount of each of the pads (4a, 4b).

YAMASAKI, Tatsuya (1578 Higashikaizuka, Iwata-sh, Shizuoka 10, 〒4388510, JP)
Application Number:
Publication Date:
May 11, 2017
Filing Date:
October 27, 2016
Export Citation:
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NTN CORPORATION (3-17, Kyomachibori 1-chome Nishi-ku, Osaka-sh, Osaka 03, 〒5500003, JP)
International Classes:
B60T8/00; B60T13/66; B60T13/74; F16D65/02; F16D65/18; F16D66/00; F16D66/02; F16D121/04; F16D121/24; F16D125/48
Foreign References:
Attorney, Agent or Firm:
SUGIMOTO, Shuji et al. (Higobashi Nittai Bldg, 10-2 Edobori 1-chome, Nishi-ku, Osaka-sh, Osaka 02, 〒5500002, JP)
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