EGR system for internal combustion engines
By positioning the EGR valve above the exhaust outlet and inclining it away from the exhaust passage, the EGR device mitigates heat exposure, improving durability and control accuracy, and optimizing engine space utilization.
JP7852348B2Active Publication Date: 2026-04-28SUZUKI MOTOR CORP
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Patent Information
- Application Number
- JP2022059898
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- Filing Date
- 2022-03-31
- Publication Date
- 2026-04-28
- Estimated Expiration
- 2042-03-31
AI Technical Summary
Technical Problem
The EGR valve in conventional internal combustion engines is easily affected by exhaust heat due to its proximity to the exhaust manifold, necessitating an improvement to mitigate this effect.
Method used
The EGR device is designed with the EGR valve mounted on the exhaust side wall of the engine body, positioned above the exhaust gas outlet, and inclined such that its drive unit is away from the exhaust passage, thereby reducing exposure to exhaust heat.
Benefits of technology
This configuration effectively suppresses the impact of exhaust heat on the EGR valve, enhancing its durability and preventing a decrease in control accuracy, while allowing for a more compact engine design by utilizing space adjacent to the exhaust gas purification device.
✦ Generated by Eureka AI based on patent content.
Abstract
To provide an EGR device for an internal combustion engine capable of inhibiting an EGR valve from being affected by exhaust heat.SOLUTION: An EGR device 11 for an engine 1 includes an EGR valve 14 for controlling a flow rate of EGR gas flowing in an EGR housing passage part 26. The EGR valve 14 is located above an exhaust gas collecting part 4b and an exhaust emission control device 9 and is mounted to a front wall 25A of an EGR housing part 25.SELECTED DRAWING: Figure 1
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