US 12,248,328 B2
Valve system
Masafumi Yamagata, Toyoake (JP)
Assigned to AISAN KOGYO KABUSHIKI KAISHA, Obu (JP)
Filed by AISAN KOGYO KABUSHIKI KAISHA, Obu (JP)
Filed on Sep. 18, 2023, as Appl. No. 18/468,787.
Claims priority of application No. 2022-162427 (JP), filed on Oct. 7, 2022.
Prior Publication US 2024/0118719 A1, Apr. 11, 2024
Int. Cl. G05D 16/20 (2006.01); F02M 25/08 (2006.01); F16K 31/02 (2006.01); F16K 37/00 (2006.01); G05D 7/06 (2006.01)
CPC G05D 16/202 (2013.01) [F02M 25/0836 (2013.01); G05D 7/0623 (2013.01); G05D 7/0652 (2013.01); F16K 31/02 (2013.01); F16K 37/005 (2013.01); Y10T 137/7761 (2015.04)] 6 Claims
OG exemplary drawing
 
1. A valve system, comprising:
a tank configured to store fluid,
a pressure sensor configured to detect an internal pressure of the tank;
a valve including a valve member and configured to open and close the tank;
a driving device configured to move the valve member; and
a control unit including at least one circuit, wherein the at least one circuit is configured to:
move the valve member in a valve open direction after beginning of a cycle;
reverse a direction of movement of the valve member and move the valve member to a standby position in a valve closed state;
calculate a first rate of pressure change, which is a rate of change in the internal pressure since the cycle began;
determine a waiting time such that a second rate of pressure change, which is a rate of change of the internal pressure from a start to an end of the cycle, is equal to a target rate of change if the first rate of pressure change is greater than the target rate of change, and
keep the driving device in the standby position until the determined waiting time has elapsed.