Fuel vapor processing device
US10801917B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 17, 2018 |
| Grant date | Oct 13, 2020 |
| Priority date | — |
| Expiry date | Jan 29, 2039 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M25/0836
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A fuel vapor processing device includes a canister, a first purge pipe that forms a first purge path that communicatively connects the inside of the canister and the inside of a fuel tank, a pressure pipe that forms a pressure detection path configured to communicatively connect a first switching valve and a pump, the first switching valve, a sealing valve disposed in the first purge pipe and configured to isolate the inside of the canister from the inside of the fuel tank, a differential pressure sensor, and an ECU. The differential pressure sensor is capable of detecting a difference between a pressure of the first purge path and a pressure of the pressure detection path. The ECU determines presence or absence of a fuel vapor leak while controlling the first switching valve, the pump, and the sealing valve based on a signal output from the differential pressure sensor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.