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Patent Searching and Data


Title:
HYDRAULIC PUMP
Document Type and Number:
WIPO Patent Application WO/2019/054512
Kind Code:
A1
Abstract:
A pump unit (3) comprises a cylinder (30) and a piston (40) that reciprocally moves along an axial direction (DL). An actuator (2) comprises a cylindrical coil body (10) and a movable body (20) that is capable of reciprocally moving in the axial direction (DL) relative to the cylindrical coil body (10). Impelling members (71, 72) for resonance are provided that impel the piston (40) or the movable body (20) in the axial direction (DL). A control unit controls the actuator (2) such that the movable body (20) reciprocally moves along the axial direction (DL) at a set drive frequency. The control unit: determines a corrected resonance frequency obtained by correcting, according to oil impact, a resonance frequency of a vibrating system including the piston (40), the movable body (20), and the impelling members (71, 72) for resonance; and controls the actuator (2) such that the movable body (20) reciprocally moves along the axial direction (DL) at the corrected resonance frequency.

Inventors:
FUJII Noriomi (10, Takane, Fujiicho, Anjo-sh, Aichi 92, 〒4441192, JP)
NISHITANI Takuya (10, Takane, Fujiicho, Anjo-sh, Aichi 92, 〒4441192, JP)
NAKAI Masaya (10, Takane, Fujiicho, Anjo-sh, Aichi 92, 〒4441192, JP)
Application Number:
JP2018/034307
Publication Date:
March 21, 2019
Filing Date:
September 14, 2018
Export Citation:
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Assignee:
AISIN AW CO., LTD. (10 Takane, Fujiicho Anjo-sh, Aichi 92, 〒4441192, JP)
International Classes:
F04B17/04; F04B35/04
Foreign References:
JP2014088856A2014-05-15
JP2002354864A2002-12-06
Attorney, Agent or Firm:
R&C IP LAW FIRM (3-3 Nakanoshima 3-chome, Kita-ku Osaka-sh, Osaka 05, 〒5300005, JP)
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