Fuel cell system

The fuel cell system addresses the issue of water droplet backflow into the bypass pipe by employing a T-shaped connection and flow-straightening ribs, effectively preventing valve freezing and ensuring system reliability.

JP7876017B1Active Publication Date: 2026-06-18HONDA MOTOR CO LTD
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Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
HONDA MOTOR CO LTD
Filing Date
2025-02-18
Publication Date
2026-06-18

AI Technical Summary

⚠Technical Problem

In fuel cell systems, backflow of water droplets into the bypass pipe occurs, leading to potential freezing of the bypass valve, which hinders reliable operation, especially in low-temperature environments.

⚗Method used

A fuel cell system design featuring a connecting portion with a main flow path, a joint flow path, and flow-straightening ribs to prevent water droplet backflow into the bypass pipe, utilizing a T-shaped connection and inward protruding ribs to direct gas flow and suppress swirling currents.

🎯Benefits of technology

Prevents water droplets from entering the bypass pipe, thereby preventing the bypass valve from freezing and ensuring reliable operation.

✦ Generated by Eureka AI based on patent content.

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Abstract

This prevents water droplets from flowing back into the bypass piping. [Solution] The fuel cell system includes a connection section 40 connecting a bypass pipe and an exhaust pipe, which comprises a main body 42 having a main flow path 46 extending in a first direction in which the exhaust pipe extends, a joint section 44 extending radially outward from the side of the main body 42 toward the main flow path 46 toward which the bypass pipe is connected, a joint flow path 48 formed inside the joint section 44 and extending in a second direction perpendicular to the main flow path 46, and a plurality of flow straightening ribs 50 that protrude inward from the inner circumferential surface 44a of the joint section 44 forming the joint flow path 48 and extend for a long distance in the second direction.
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