Title:
VALVE TIMING CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE
Document Type and Number:
WIPO Patent Application WO/2017/104246
Kind Code:
A1
Abstract:
A valve timing control device is provided with: a bolt insertion hole 7a which is formed in an extending manner at a position axially facing a bolt hole 2b formed in the camshaft 2 of the rotor section 21 of a vane rotor 7 and through which the shaft section 6b of a cam bolt 6 is inserted; a radial groove 52, an axial groove 53, and a passage groove 54, which are formed on the front end side of the vane rotor so as to extend radially and axially from the bolt insertion hole and which are in communication with a back-pressure chamber 29d; and a discharge passage 56 which is formed between the inner peripheral surface of the bolt hole and the outer peripheral surface of the shaft section of the cam bolt, has one end in communication with the passage groove 54, and has the other end in communication with a drain hole 57 formed in the camshaft. As a result, a passage for discharging air, etc. within the back-pressure chamber can be formed without increasing the outer diameter of the vane rotor, and consequently, an increase in the size of the entire valve timing control device can be reduced.
Inventors:
SHINOMIYA TORU (JP)
Application Number:
PCT/JP2016/080510
Publication Date:
June 22, 2017
Filing Date:
October 14, 2016
Export Citation:
Assignee:
HITACHI AUTOMOTIVE SYSTEMS LTD (JP)
International Classes:
F01L1/356
Foreign References:
| JP2011064105A | 2011-03-31 | |||
| JP2000282819A | 2000-10-10 | |||
| JPH0771211A | 1995-03-14 | |||
| JP2002188415A | 2002-07-05 |
Attorney, Agent or Firm:
KOBAYASHI, Hiromichi et al. (JP)
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