Hydrogen Direct Injection System and Method for Lubricating a Fuel Injector of a Hydrogen Direct Injection System
US-2024376852-A1 · Nov 14, 2024 · US
Fuel supply device
US12460603B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12460603-B2 |
| Application number | US-202418906183-A |
| Country | US |
| Kind code | B2 |
| Filing date | Oct 4, 2024 |
| Priority date | Nov 22, 2023 |
| Publication date | Nov 4, 2025 |
| Grant date | Nov 4, 2025 |
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- Title
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- Abstract
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- Assignees and inventors
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- First independent claim
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- CPC / IPC classifications
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- Citations and related patents
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Abstract
Official abstract text for this publication.
A fuel supply device includes a fuel tank, a delivery pipe in which gas fuel to be supplied to a fuel injection valve is stored, a supply passage through which the fuel gas supplied from the fuel tank to the delivery pipe flows, a shut-off valve provided in the supply passage, an oil supply device that supplies oil to a downstream portion of the supply passage, and a controller. The controller executes an oil supply process during operation of the internal combustion engine to close the shut-off valve to stop the supply of the gas fuel to the delivery pipe, and supply the oil to the downstream portion by the oil supply device when the pressure in the delivery pipe has dropped.
First claim
Opening claim text (preview).
What is claimed is: 1 . A fuel supply device for an internal combustion engine including a fuel injection valve that injects gas fuel, the fuel supply device comprising: a fuel tank that stores the gas fuel at high pressure; a delivery pipe that stores the gas fuel to be supplied to the fuel injection valve; a supply passage through which the fuel gas supplied from the fuel tank to the delivery pipe flows; a shut-off valve provided in the supply passage, the shut-off valve being closed when supply of the gas fuel to the delivery pipe is stopped; an oil supply device that supplies oil to a downstream portion of the supply passage, the downstream portion being a portion between a position of the shut-off valve and a part connected to the delivery pipe; and a controller that controls the shut-off valve and the oil supply device, wherein the controller is configured to execute an oil supply process during operation of the internal combustion engine to close the shut-off valve to stop the supply of the gas fuel to the delivery pipe, and supply the oil to the downstream portion by the oil supply device when the pressure in the delivery pipe is lower than that before the shut-off valve is closed. 2 . The fuel supply device according to claim 1 , wherein the controller is configured to execute the oil supply process on condition that a specified amount of time has elapsed from a point in time at which the oil supply process was executed last time. 3 . The fuel supply device according to claim 2 , wherein the controller is configured to change a length of the specified amount of time depending on an operating state of the internal combustion engine. 4 . The fuel supply device according to claim 2 , wherein the controller is configured to execute the oil supply process when at least one of the following conditions is met in a case in which the specified amount of time has elapsed from the point in time at which the oil supply process was executed last time, the condition being: the internal combustion engine is idling; the operation of the internal combustion engine has not been stopped; and a rotation speed of the internal combustion engine has not started decreasing.
Assignees
Inventors
Classifications
Control of components of the fuel supply system · CPC title
- F02M67/12Primary
having valves · CPC title
using lubricating pumps (pumps in general F04; lubricating pumps per se F16N) · CPC title
Lubrication specially adapted for engines with crankcase compression of fuel-air mixture or for other engines in which lubricant is contained in fuel, combustion air, or fuel-air mixture (separating lubricant from air or fuel-air mixture before entry into cylinder F01M11/08) · CPC title
to adjust the fuel mass or volume flow · CPC title
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Frequently asked questions
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- What does patent US12460603B2 cover?
- A fuel supply device includes a fuel tank, a delivery pipe in which gas fuel to be supplied to a fuel injection valve is stored, a supply passage through which the fuel gas supplied from the fuel tank to the delivery pipe flows, a shut-off valve provided in the supply passage, an oil supply device that supplies oil to a downstream portion of the supply passage, and a controller. The controller …
- Who is the assignee on this patent?
- Toyota Motor Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification F02M67/12. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue Nov 04 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 6 related publications on this page (citations in our corpus or others sharing the same primary CPC).