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US 12,486,924 B2Granted
Valve system
AssigneeAisan Kogyo Kabushiki Kaisha
InventorMasafumi Yamagata
Life of this patent
Estimating the term…
Abstract
A valve system that can quickly estimate the valve opening position including a tank to store fluid, a pressure sensor having a valve element to detect an internal pressure of the tank, a valve to open and close the tank, a driving device to stroke the valve element of the valve, and a control unit.
Claims8
A valve system for estimating a valve opening position, the valve system comprising:
- a tank for storing fluid;
- a pressure sensor configured to detect an internal pressure of the tank;
- a valve for opening and closing the tank, wherein the valve includes a valve element;
- a driving device configured to stroke the valve element;
- and
- a control unit configured to operate the driving device,
- wherein the control unit is configured to:
- continuously move the valve element from a closed valve state in a valve opening direction at a constant valve opening speed;
- store a position of the valve element or stop the valve element when the pressure sensor detects that an internal pressure of the tank decreases by a certain amount;
- and
- estimate the valve opening position based on the stored position or stopping position of the valve element and a valve opening distance of the valve element, wherein the valve opening distance is the distance when the internal pressure of the tank decreases by an amount wherein the amount is predetermined by the internal pressure of the tank before the valve opens.
8 more elements
A valve system for estimating a valve opening position, the system comprising:
- a tank for storing fluid;
- a pressure sensor configured to detect an internal pressure of the tank;
- a valve configured to open and close the tank, wherein the valve includes a valve element;
- a driving device configured to stroke the valve element;
- and
- a control unit configured to operate the driving device,
- wherein the control unit is configured to:
- continuously move the valve element from a closed valve state in a valve opening direction at a constant valve opening speed;
- store a position of the valve element or stop the valve element when the pressure sensor detects that an internal pressure of the tank decreases by a certain amount;
- and
- regard a position obtained by subtracting a certain amount of stroke from the stored position or the stopping position of the valve element as an estimated valve opening position, wherein the certain amount of stroke is the amount of stroke equal or larger than the valve opening distance of the valve element until the internal pressure decreases by a certain amount, which is predetermined with respect to the internal pressure of the tank before the valve is opened.
8 more elements
Dependencies are inferred from the claim text.