Title:
VALVE TIMING CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE
Document Type and Number:
WIPO Patent Application WO/2020/085057
Kind Code:
A1
Abstract:
A valve timing control device for an internal combustion engine is provided with a lock mechanism 4 capable of restricting a relative rotation position of a vane rotor 9 with respect to a housing 7. The lock mechanism has a lock hole 24 that is provided on an internal surface of a sprocket, a lock pin 26 that is movably accommodated inside a pin hole 31a provided in the vane rotor and insertable into the lock hole, and a lock passage 39 that is provided in the vane rotor and communicates with the lock hole in a state in which the lock pin is inserted into the lock hole. The lock passage is provided with a general passage part 39a and one-end opening part 39b that is formed on one end side facing the lock hole of the general passage part, wherein an opening cross-sectional area of the one-end opening part is greater than a passage cross-sectional area of the general passage part. With these configurations, it is possible to reduce the passage length of a supply and discharge passage to improve the unlocking response of the lock pin and the insertion of the lock pin into the lock hole.
Inventors:
SHIOWAKI DAISUKE (JP)
KAWAHARA TATSUYA (JP)
KAWAHARA TATSUYA (JP)
Application Number:
PCT/JP2019/039436
Publication Date:
April 30, 2020
Filing Date:
October 07, 2019
Export Citation:
Assignee:
HITACHI AUTOMOTIVE SYSTEMS LTD (JP)
International Classes:
F01L1/356
Foreign References:
| JP2000179310A | 2000-06-27 | |||
| JP2013227920A | 2013-11-07 | |||
| JP2013147934A | 2013-08-01 | |||
| JP2014062547A | 2014-04-10 |
Attorney, Agent or Firm:
KOBAYASHI, Hiromichi et al. (JP)
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