Methods and systems for shut down of a multi-fuel engine
US-2023193840-A1 · Jun 22, 2023 · US
Controller and control method for internal combustion engine
US2024011446A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2024011446-A1 |
| Application number | US-202318346240-A |
| Country | US |
| Kind code | A1 |
| Filing date | Jul 2, 2023 |
| Priority date | Jul 6, 2022 |
| Publication date | Jan 11, 2024 |
| Grant date | — |
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- Title
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Abstract
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An internal combustion engine uses hydrogen as fuel. The internal combustion engine includes a coupling passage that connects a crankcase and a surge tank to each other. A controller executes a control of causing an air-fuel ratio of an air-fuel mixture to be lower when a target output of the internal combustion engine is relatively high than when the target output is relatively low. The controller executes a pressure reduction process of reducing a pressure in an intake passage when the target output is less than a specific value. The pressure reduction process is a process of reducing the pressure in the intake passage to be lower than that before the execution of the pressure reduction process.
First claim
Opening claim text (preview).
What is claimed is: 1 . A controller for an internal combustion engine, wherein the internal combustion engine uses hydrogen as fuel and includes a coupling passage that connects a crankcase and an intake passage to each other, the controller includes control circuitry that is configured to execute a control of causing an air-fuel ratio of an air-fuel mixture to be lower when a target output of the internal combustion engine is relatively high than when the target output is relatively low, and a pressure reduction process of reducing a pressure in the intake passage when the target output is less than a specific value, and the pressure reduction process is a process of reducing the pressure in the intake passage to be lower than that before an execution of the pressure reduction process. 2 . The controller for the internal combustion engine according to claim 1 , wherein the intake passage includes a throttle valve, and the pressure reduction process includes reducing an opening degree of the throttle valve. 3 . The controller for the internal combustion engine according to claim 1 , wherein the internal combustion engine includes a variable valve actuation mechanism that changes a valve opening timing of an intake valve, and the pressure reducing process includes advancing the valve opening timing. 4 . The controller for the internal combustion engine according to claim 1 , wherein the internal combustion engine includes a forced-induction device that compresses air in the intake passage, and the pressure reduction process includes reducing a boost pressure of the forced-induction device. 5 . A control method for an internal combustion engine, wherein the internal combustion engine uses hydrogen as fuel and includes a coupling passage that connects a crankcase and an intake passage to each other, the control method comprises: executing a control of causing an air-fuel ratio of an air-fuel mixture to be lower when a target output of the internal combustion engine is relatively high than when the target output is relatively low; and executing a pressure reduction process of reducing a pressure in the intake passage when the target output is less than a specific value, and the pressure reduction process is a process of reducing the pressure in the intake passage to be lower than that before an execution of the pressure reduction process.
Assignees
Inventors
Classifications
- F02D41/0002Primary
Controlling intake air · CPC title
changing the valve timing only · CPC title
by simultaneous control of throttle and variable valve actuation · CPC title
- F02D41/0027Primary
the fuel being gaseous (non-electrical control F02D19/02) · CPC title
Intake manifold pressure · CPC title
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Frequently asked questions
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- What does patent US2024011446A1 cover?
- An internal combustion engine uses hydrogen as fuel. The internal combustion engine includes a coupling passage that connects a crankcase and a surge tank to each other. A controller executes a control of causing an air-fuel ratio of an air-fuel mixture to be lower when a target output of the internal combustion engine is relatively high than when the target output is relatively low. The contro…
- Who is the assignee on this patent?
- Toyota Motor Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification F02D41/0002. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Thu Jan 11 2024 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 5 related publications on this page (citations in our corpus or others sharing the same primary CPC).