Title:
HYDRAULIC AUTO-TENSIONER AND METHOD FOR MANUFACTURING PLUNGER FOR HYDRAULIC AUTO-TENSIONER
Document Type and Number:
WIPO Patent Application WO/2017/043491
Kind Code:
A1
Abstract:
Provided is a hydraulic auto-tensioner provided with a cylinder (10), a valve sleeve (13) disposed upright within the cylinder (10), a plunger (14) slideably inserted through the valve sleeve (13), a rod (16) slideably inserted through the plunger (14), a pressure chamber (25) formed between the valve sleeve (13) and the plunger (14) and rod (16), and a reservoir chamber (27) formed between the cylinder (10) and the valve sleeve (13), wherein during normal operation of an engine (E), an operating oil flows from the pressure chamber (25) to the reservoir chamber (27) through a first narrowing passage (31) between the rod (16) and the plunger (14), and during restarting by an ISG (51), the operating oil flows from the pressure chamber (25) to the reservoir chamber (27) through a second narrowing passage (32) between the valve sleeve (13) and the plunger (14).
Inventors:
ONIMARU KOUICHI (JP)
MAENO EIJI (JP)
FUKAHORI TSUYOSHI (JP)
AGATA IKUMI (JP)
MORIMOTO HIROO (JP)
TAKANO TAKEHIRO (JP)
TANAKA TADAHISA (JP)
ABE KATSUFUMI (JP)
MAENO EIJI (JP)
FUKAHORI TSUYOSHI (JP)
AGATA IKUMI (JP)
MORIMOTO HIROO (JP)
TAKANO TAKEHIRO (JP)
TANAKA TADAHISA (JP)
ABE KATSUFUMI (JP)
Application Number:
PCT/JP2016/076194
Publication Date:
March 16, 2017
Filing Date:
September 06, 2016
Export Citation:
Assignee:
NTN TOYO BEARING CO LTD (JP)
International Classes:
F16H7/12; B21K21/12; B21K23/04; F16J1/00
Domestic Patent References:
| WO2016143788A1 | 2016-09-15 | |||
| WO2012019801A1 | 2012-02-16 |
Foreign References:
| JP2015068352A | 2015-04-13 | |||
| JP2009121527A | 2009-06-04 | |||
| JP2011027238A | 2011-02-10 |
Attorney, Agent or Firm:
KAMADA Naoya et al. (JP)
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