Combustion control for ammonia fueled engine
US-2023101071-A1 · Mar 30, 2023 · US
Controller for hydrogen engine
US12253039B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12253039-B2 |
| Application number | US-202418623671-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 1, 2024 |
| Priority date | Apr 7, 2023 |
| Publication date | Mar 18, 2025 |
| Grant date | Mar 18, 2025 |
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- Title
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Abstract
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A controller for a hydrogen engine that includes an in-cylinder pressure sensor and an air-fuel ratio sensor includes processing circuitry. The processing circuitry is configured to execute a process that calculates a fluctuation amount of a combustion pressure based on an output of the in-cylinder pressure sensor and a process that calculates a correction amount based on the fluctuation amount. The correction amount is used to correct a rich deviation of an output of the air-fuel ratio sensor due to unburned hydrogen in exhaust gas.
First claim
Opening claim text (preview).
What is claimed is: 1. A controller for a hydrogen engine configured to operate using hydrogen gas as fuel, the hydrogen engine including an in-cylinder pressure sensor and an air-fuel ratio sensor, the controller comprising processing circuitry configured to execute: a process that calculates a fluctuation amount of a combustion pressure based on an output of the in-cylinder pressure sensor; and a process that calculates a correction amount based on the fluctuation amount, the correction amount being used to correct a rich deviation of an output of the air-fuel ratio sensor due to unburned hydrogen as the fuel in exhaust gas. 2. The controller according to claim 1 , wherein the processing circuitry is configured to calculate the correction amount such that a ratio of an absolute value of the correction amount to the fluctuation amount is larger when a load factor of the hydrogen engine is relatively small than when the load factor is relatively large. 3. The controller according to claim 1 , wherein the hydrogen engine further includes a NOx sensor that detects a NOx concentration in the exhaust gas, and the processing circuitry is configured to calculate the correction amount when the NOx concentration is stable such that a fluctuation in the NOx concentration is less than or equal to a predetermined value. 4. The controller according to claim 1 , wherein the processing circuitry is configured to calculate the correction amount when both the NOx concentration and an engine speed are stable such that a fluctuation in the NOx concentration is less than or equal to a first predetermined value; and a fluctuation in the engine speed is less than or equal to a second predetermined value.
Assignees
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the characteristics being an NOx content or concentration · CPC title
Fluid pressure of lubricating oil or working fluid · CPC title
Use of alternative fuels, e.g. biofuels · CPC title
with correction for particular operating conditions · CPC title
measuring engine roughness · CPC title
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- What does patent US12253039B2 cover?
- A controller for a hydrogen engine that includes an in-cylinder pressure sensor and an air-fuel ratio sensor includes processing circuitry. The processing circuitry is configured to execute a process that calculates a fluctuation amount of a combustion pressure based on an output of the in-cylinder pressure sensor and a process that calculates a correction amount based on the fluctuation amount…
- Who is the assignee on this patent?
- Toyota Motor Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification F02D41/1454. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue Mar 18 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 5 related publications on this page (citations in our corpus or others sharing the same primary CPC).