Vehicle height adjustment system
US-2017151849-A1 · Jun 1, 2017 · US
Life determination device and life determination method
US12510394B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12510394-B2 |
| Application number | US-202318467471-A |
| Country | US |
| Kind code | B2 |
| Filing date | Sep 14, 2023 |
| Priority date | Dec 15, 2022 |
| Publication date | Dec 30, 2025 |
| Grant date | Dec 30, 2025 |
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- Title
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Abstract
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An ECU is configured to determine the life of a pressure storage tank. The pressure storage tank has a gas chamber filled with gas, an oil chamber connected to a common passageway, and a piston dividing the gas chamber and the oil chamber. The pressure storage tank is configured to store hydraulic oil in the oil chamber and to release the hydraulic oil from the oil chamber. The ECU calculates a movement amount of the piston based on the volume change of the gas chamber. The ECU determines that the life of the pressure storage tank has ended when an integrated value of the calculated movement amount exceeds a threshold value.
First claim
Opening claim text (preview).
What is claimed is: 1 . A life determination device for determining a life of a pressure storage tank, wherein the pressure storage tank has a gas chamber filled with gas, an oil chamber connected to an oil path, and a piston dividing the gas chamber and the oil chamber, and the pressure storage tank is configured to store hydraulic oil in the oil chamber and to release the hydraulic oil from the oil chamber, the life determination device comprising: a movement amount calculation section that calculates a movement amount of the piston based on a volume change of the gas chamber; and a life determination section determining that a life of the pressure storage tank has ended when an integrated value of the movement amount calculated by the movement amount calculation section exceeds a threshold value. 2 . The life determination device according to claim 1 , further comprising a volume change calculation section that calculates the volume change of the gas chamber, the volume change calculation section being configured to calculate the volume change of the gas chamber based on a temperature of the gas chamber before pressure storage, a pressure of the gas chamber before pressure storage, a temperature of the gas chamber after pressure storage, and a pressure of the gas chamber after pressure storage. 3 . The life determination device according to claim 2 , wherein the oil path is a common passageway of a ride height adjustment system, the common passageway is provided with a temperature sensor to detect a temperature of the hydraulic oil and a pressure sensor to detect a pressure of the hydraulic oil, the temperature of the gas chamber is estimated based on a detection result of the temperature sensor, and the pressure of the gas chamber is estimated based on a detection result of the pressure sensor. 4 . A life determination method for determining a life of a pressure storage tank, wherein the pressure storage tank has a gas chamber filled with gas, an oil chamber connected to an oil path, and a piston dividing the gas chamber and the oil chamber, and the pressure storage tank is configured to store hydraulic oil in the oil chamber and to release the hydraulic oil from the oil chamber, the life determination method comprising the steps of: calculating an amount of movement of the piston based on a volume change of the gas chamber; and determining that the life of the pressure storage tank has ended when an integrated value of the calculated movement amount exceeds a threshold value.
Assignees
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Classifications
using counting means or digital clocks · CPC title
characterised by the action on a particular type of suspension unit (B60G17/01941 takes precedence) · CPC title
Detecting or preventing malfunction, e.g. fail safe · CPC title
Installations or systems with accumulators · CPC title
Pressure detection · CPC title
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Frequently asked questions
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- What does patent US12510394B2 cover?
- An ECU is configured to determine the life of a pressure storage tank. The pressure storage tank has a gas chamber filled with gas, an oil chamber connected to a common passageway, and a piston dividing the gas chamber and the oil chamber. The pressure storage tank is configured to store hydraulic oil in the oil chamber and to release the hydraulic oil from the oil chamber. The ECU calculates a…
- Who is the assignee on this patent?
- Toyota Motor Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification G01F22/02. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Dec 30 2025 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).