Fuel supply system for internal combustion engines
The fuel supply system for internal combustion engines uses pressure and temperature sensors to calculate hydrogen mass differences, addressing temperature-induced density changes and ensuring accurate fuel leakage detection.
JP2026143252AActive Publication Date: 2026-09-08TOYOTA JIDOSHA KK
1 Cites 0 Cited by
Patent Information
- Application Number
- JP2025030745
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2025-02-27
- Publication Date
- 2026-09-08
- Estimated Expiration
- 2045-02-27
AI Technical Summary
Technical Problem
Existing hydrogen detection systems in internal combustion engines fail to accurately detect fuel leakage due to changes in fuel density caused by temperature fluctuations and pressure changes in the fuel passage, especially during engine shutdown and startup.
Method used
A fuel supply system that includes a pressure sensor, temperature sensor, and control device to calculate the difference in hydrogen mass before and after engine shutdown, using fuel pressure and temperature data to determine fuel leaks in the fuel passage.
Benefits of technology
Accurately detects hydrogen gas leaks by accounting for temperature-induced density changes, ensuring reliable fuel leakage detection even during engine heat transfer.
✦ Generated by Eureka AI based on patent content.
Abstract
To properly detect hydrogen gas leaks. [Solution] The control device 100 of the fuel supply device 300 includes a processing circuit 110 that performs a process to determine whether or not there is a fuel leak in the fuel passage downstream of the second shut-off valve 22, which is provided in the fuel passage and opens and closes the fuel passage. When the mass of the fuel in the fuel passage downstream of the second shut-off valve 22 is defined as the hydrogen mass, the processing circuit 110 performs the following processes: calculate a first hydrogen mass based on the fuel pressure and fuel temperature when the second shut-off valve 22 is closed due to engine shutdown; calculate a second hydrogen mass based on the fuel pressure and fuel temperature immediately before the second shut-off valve 22 opens due to engine startup after engine shutdown; calculate the difference between the first hydrogen mass and the second hydrogen mass; and determine whether or not there is a fuel leak based on the difference.
Need to check novelty before this filing date? Find Prior Art