Evaporated fuel treatment apparatus
US11105283B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 13, 2020 |
| Grant date | Aug 31, 2021 |
| Priority date | — |
| Expiry date | Oct 13, 2040 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D41/1454
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
In an evaporated fuel treatment apparatus, a controller performs first purge concentration determination control by gradually increasing a purge flow rate in increments of a predetermined amount and detect a purge concentration based on a detection value of the pressure sensor. As the first purge concentration determination control, the controller performs a control to prohibit changing of an operating state of the purge pump or changing of an open state of the purge valve until a detected concentration determination time at which a variation range of the purge concentration detected based on a detection value of a pressure sensor becomes equal to or less than a predetermined value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.