Engine system and gaseous fuel combustion method

By injecting liquid fuel after gaseous fuel flame propagation in the combustion chamber, the method and system address the issues of nitrogen oxide and unburned hydrocarbon residues, enhancing combustion efficiency and emission control.

JP7885183B2Inactive Publication Date: 2026-07-06YANMAR HLDG CO LTD
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Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
YANMAR HLDG CO LTD
Filing Date
2023-09-05
Publication Date
2026-07-06
Estimated Expiration
Not applicable · inactive patent

AI Technical Summary

Technical Problem

Existing internal combustion engine methods for burning gaseous fuel result in increased nitrogen oxide generation and unburned hydrocarbon residues due to high combustion temperatures and subsequent fuel injections.

Method used

A combustion method and system that injects liquid fuel after the flame propagation of gaseous fuel has finished to control and suppress nitrogen oxide generation and unburned hydrocarbon residues, using a control unit to manage the liquid fuel injection timing.

Benefits of technology

Effectively reduces nitrogen oxide generation and unburned hydrocarbon residues by optimizing the liquid fuel injection timing post-flame propagation, achieving a balanced exhaust emission profile.

✦ Generated by Eureka AI based on patent content.

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Patent Text Reader

Abstract

To provide an engine system capable of suppressing generation of nitrogen oxides and / or suppressing uncombusted hydrocarbons from remaining.SOLUTION: An engine system 100 has a combustion chamber 71 to which air and a gas fuel are supplied, and is configured to combust the gas fuel. The engine system 100 includes a liquid fuel injecting unit 66, and a control unit 211. The liquid fuel injecting unit 66 is configured to inject a liquid fuel thereby to ignite the gas fuel. The control unit 211 is configured to control the liquid fuel injecting unit 66. The control unit 211 is configured to control the liquid fuel injecting unit 66 so that injection of the liquid fuel is performed after completion of flame propagation after ignition of the gas fuel.SELECTED DRAWING: Figure 2
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