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Patent Searching and Data


Title:
VARIABLE VALVE TIMING DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/188479
Kind Code:
A1
Abstract:
This variable valve timing device is provided with a camshaft which is rotatably supported by an engine, and a cam which is provided on the camshaft and which opens and closes valves provided at a cylinder constituting the engine. The cam is provided with an operating angle variable mechanism which comprises a plurality of cams having different phases and operating angles relative to a single valve, and which axially moves and positions the camshaft to switch between the cams which open and close the valve. The operating angle variable mechanism is provided with a lock mechanism which moves the camshaft to position the camshaft at a position at which each of the plurality of cams is singly used to open and close the valve, and to a position at which the plurality of cams are used in combination to open and close the valve. As a result, a cam profile can be manufactured easily, an operating angle and a lift amount can be regulated appropriately in a wide range, and cam shaft positioning control can be stably and easily performed.

Inventors:
SHIMADA Atsushi (6-6, Marunouchi 1-chome, Chiyoda-k, Tokyo 80, 〒1008280, JP)
SUKEGAWA Yoshihiro (6-6, Marunouchi 1-chome, Chiyoda-k, Tokyo 80, 〒1008280, JP)
ARITOMI Shunsuke (6-6, Marunouchi 1-chome, Chiyoda-k, Tokyo 80, 〒1008280, JP)
TSUKADA Tomoya (2520, Takaba, Hitachinaka-sh, Ibaraki 03, 〒3128503, JP)
Application Number:
JP2019/011099
Publication Date:
October 03, 2019
Filing Date:
March 18, 2019
Export Citation:
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Assignee:
HITACHI AUTOMOTIVE SYSTEMS, LTD. (2520, Takaba Hitachinaka-sh, Ibaraki 03, 〒3128503, JP)
International Classes:
F01L13/00; F01L1/14; F01L1/18; F01L1/356
Domestic Patent References:
WO2017028918A12017-02-23
Foreign References:
JPH06346710A1994-12-20
DE102006014965A12007-10-11
Attorney, Agent or Firm:
POLAIRE I.P.C. (13-11, Nihonbashikayabacho 2-chome Chuo-k, Tokyo 25, 〒1030025, JP)
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