Valve timing adjustment device
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United States of America Patent
Stats
-
Feb 13, 2024
Grant Date -
N/A
app pub date -
Sep 23, 2021
filing date -
Mar 25, 2019
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A valve timing adjustment device includes a vane rotor and a hydraulic oil control valve. The vane rotor is fixed to an end portion of one of a drive shaft and a driven shaft and defines a through hole. The hydraulic oil control valve includes a sleeve and a spool. The sleeve includes a body portion in the through hole and a fixing portion fixed into a shaft fixing hole defined in the one. At least a portion of the through hole is sealed by the body portion. A difference between a radial dimension of the shaft fixing hole and a radial dimension of the fixing portion is greater than a total of a predetermined coaxiality between the through hole and the shaft fixing portion and a predetermined coaxiality between the body portion and the fixing portion.
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