Exhaust system of an internal combustion engine
By implementing a heat exchange system between upstream and downstream piping in the exhaust system, the issue of frozen condensed water in differential pressure sensors is resolved, ensuring reliable pressure detection in cold environments.
JP2026085930APending Publication Date: 2026-05-26TOYOTA JIDOSHA KK
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Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- TOYOTA JIDOSHA KK
- Filing Date
- 2024-11-14
- Publication Date
- 2026-05-26
AI Technical Summary
Technical Problem
Differential pressure sensors in exhaust systems of internal combustion engines are prone to blockage due to freezing of condensed water in downstream piping, leading to inaccurate pressure detection in cold environments.
Method used
The upstream and downstream piping connected to the differential pressure sensor are configured to exchange heat through a heat exchange section, with the upstream piping receiving thermal energy from the exhaust pipe, which is then conducted to the downstream piping to prevent freezing.
Benefits of technology
This configuration effectively prevents the downstream piping from freezing, ensuring accurate differential pressure detection by maintaining the temperature of the piping, even in cold conditions.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure 2026085930000001_ABST
Abstract
This invention provides a technology that can prevent the piping of a differential pressure sensor from becoming blocked due to the freezing of condensed water. [Solution] The exhaust system of an internal combustion engine includes a particulate filter positioned in the middle of the exhaust pipe, an upstream pipe connected to the exhaust pipe upstream of the particulate filter, a downstream pipe connected to the exhaust pipe downstream of the particulate filter, and a differential pressure sensor to which the upstream and downstream pipes are connected. In the exhaust system of an internal combustion engine, the upstream and downstream pipes are configured to exchange heat via a heat exchange section.
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