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Patent Searching and Data


Title:
ELECTRIC BOOSTER
Document Type and Number:
WIPO Patent Application WO/2018/155286
Kind Code:
A1
Abstract:
Provided is an electric booster comprising a stroke detection device, with which ease of installation in a vehicle can be improved without increasing size. The electric booster comprises an electric motor for propelling a piston of a master cylinder, a stroke detection device that detects the amount of movement of an input member connected to a brake pedal, a rotational angle detector that detects the rotational angle of a rotating shaft of the electric motor, a control device that controls the driving of the electric motor on the basis of the detection results in the stroke detection device and the rotational angle detector, and a casing in which is stored wiring electrically connecting the electric motor and the control device. The stroke detection device comprises a first magnet that moves together with the input member, and a first magnetism detection element that detects magnetism from the first magnet. The rotational angle detector comprises a second magnet that rotates together with the rotating shaft of the electric motor, and a second magnetism detection element that detects magnetism from the second magnet. The first magnetism detection element and the second magnetism detection element are disposed inside the casing.

Inventors:
FUKAYAMA, Norihisa (2520, Takaba, Hitachinaka-sh, Ibaraki 03, 〒3128503, JP)
TSUCHIYA, Hidekazu (2520, Takaba, Hitachinaka-sh, Ibaraki 03, 〒3128503, JP)
SHIMIZU, Shinji (2520, Takaba, Hitachinaka-sh, Ibaraki 03, 〒3128503, JP)
Application Number:
JP2018/005154
Publication Date:
August 30, 2018
Filing Date:
February 15, 2018
Export Citation:
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Assignee:
HITACHI AUTOMOTIVE SYSTEMS, LTD. (2520, Takaba Hitachinaka-sh, Ibaraki 03, 〒3128503, JP)
International Classes:
B60T13/74
Domestic Patent References:
WO2016194611A12016-12-08
Foreign References:
JP2016075686A2016-05-12
JP2016193636A2016-11-17
Attorney, Agent or Firm:
ONO, Shinjiro et al. (YUASA AND HARA, Section 206 New Ohtemachi Bldg., 2-1, Ohtemachi 2-chome, Chiyoda-k, Tokyo 04, 〒1000004, JP)
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