HYDRAULIC AUTO-TENSIONER

WIPO Patent Application WO/2015/045941

A1

A plunger (30) capable of sliding along the inner-diameter surface of a valve sleeve (14) and the outer-diameter surface of a rod (15) is fitted onto the lower end of the rod (15), and a valve hole (33) is provided in a base plate (31) of the plunger (30). A first leakage clearance (L1) is provided between the sliding surfaces of the plunger (30) and the valve sleeve (14), and a second leakage clearance (L2) is provided between the sliding surfaces of the plunger (30) and the rod (15). When the engine is operating normally oil in a pressure chamber (16) leaks into a reservoir chamber (24) from the second leakage clearance (L2), which has a small flow path resistance. However, when the engine is started by a starter/generator (2), the plunger (30) is raised and the valve hole (33) closes, and the oil in the pressure chamber (16) leaks into the reservoir chamber (24) from the first leakage clearance (L1), which has a large flow path resistance, so that a belt (4) is held with the appropriate tension.

KITANO SATOSHI (JP)
TANAKA TADAHISA (JP)
MAENO EIJI (JP)

PCT/JP2014/074377

April 02, 2015

September 16, 2014

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NTN TOYO BEARING CO LTD (JP)

F16H7/12

WO2013119412A1	2013-08-15
WO2012019801A1	2012-02-16

JP2013151974A	2013-08-08
JP2013142405A	2013-07-22
JP2012251629A	2012-12-20
JP2011027238A	2011-02-10
JP2010276152A	2010-12-09
JP2009264419A	2009-11-12
JP2009222081A	2009-10-01
JP2009191863A	2009-08-27
DE102010045877A1	2012-03-22
JP2009275757A	2009-11-26
JP2012241794A	2012-12-10

See also references of EP 3051178A4

KAMADA Naoya et al. (JP)
Naoya Kamata (JP)

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