VALVE TIMING ADJUSTMENT SYSTEM AND ELECTRONIC CONTROL DEVICE

WIPO Patent Application WO/2023/008184

A1

This valve timing adjustment system comprises: a valve timing adjustment device (1); a phase lock mechanism (2); a hydraulic control valve (3); an electromagnetic drive unit (4); and an electronic control device (5). When removing a lock pin (50) of the phase lock mechanism (2) from a fitting recessed part (51) from a state in which the distal end of the lock pin (50) is fitted into the fitting recessed part (51), the electronic control device performs initial movement control in which current is applied for a prescribed amount of time at a prescribed current value to the electromagnetic drive unit (4) so as to move a spool (90) of the hydraulic control valve (3) from an initial position. Subsequently, the electronic control device (5) performs gradual change control in which the lock pin (50) is removed from the fitting recessed part (51) by applying current to the electromagnetic drive unit (4) while gradually increasing the current value from a current value that is greater than 0 and smaller than the current value which was applied in the initial movement control.

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TAKENAKA KENICHIRO (JP)

PCT/JP2022/027450

February 02, 2023

July 12, 2022

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DENSO CORP (JP)

F01L1/356; F02D13/02

JP2010255499A	2010-11-11
JP2019105167A	2019-06-27
JP2011231713A	2011-11-17
US20170335726A1	2017-11-23
JP4161880B2	2008-10-08

YOU-I PATENT FIRM (JP)

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