Engine equipment
By controlling fuel injection timing and distribution between port and in-cylinder injectors, the engine device ensures complete atomization, reducing particulate matter and emissions in turbocharged engines.
JP7757910B2Active Publication Date: 2025-10-22TOYOTA JIDOSHA KK
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Patent Information
- Application Number
- JP2022135195
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- Filing Date
- 2022-08-26
- Publication Date
- 2025-10-22
- Estimated Expiration
- 2042-08-26
AI Technical Summary
Technical Problem
In engine systems with turbochargers, fuel injected from a port injection valve during the supercharging and scavenging regions can ignite before complete atomization, leading to incomplete combustion and increased particulate matter.
Method used
The engine device controls fuel injection by setting the exhaust valve closure timing as the start for port injection, ensuring sufficient atomization time before ignition, and adjusting fuel amounts between port and in-cylinder injectors based on atomization requirements and total fuel needs.
Benefits of technology
This approach prevents incomplete fuel burning, reducing particulate matter and suppressing emissions in both supercharging and scavenging regions.
✦ Generated by Eureka AI based on patent content.
Abstract
To suppress deterioration of emission in a supercharging region and a scavenging region.SOLUTION: Defining a time required for the fuel injected from a port injection valve to be atomized as an atomization required time, when in a supercharging region and in a scavenging region: timing at which an exhaust valve is closed is set to be start timing to start fuel injection from the port injection valve; timing preceding ignition timing by the atomization required time is set to be final stop timing; a port fuel injection amount by which the fuel is injected from the port injection valve is calculated on the basis of a time from the start timing to the final stop timing; and when the port fuel injection amount is larger than a total fuel injection amount, a fuel injection amount obtained by subtracting the port fuel injection amount from the total fuel injection amount is calculated as a cylinder fuel injection amount to be injected from a cylinder injection valve.SELECTED DRAWING: Figure 3
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