Fuel vapor processing apparatus
US10006386B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Nov 18, 2016 |
| Grant date | Jun 26, 2018 |
| Priority date | — |
| Expiry date | Mar 4, 2037 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D2200/0602
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A fuel vapor processing apparatus includes a vapor path connecting an adsorbent canister to a tank, where a valve is disposed in the vapor path and comprises a body and a seat, and a control unit configured to detect a movement distance of the body from the seat as a valve movement distance at a valve opening start position. This position results when a change in inner pressure of the tank after starting movement of the body toward a valve opening direction becomes greater in magnitude than a predetermined amount, wherein the control unit stores the valve movement distance in the valve opening direction as a learning value, and also stores one of two predetermined restriction values as the learning value instead of the valve movement distance when the valve movement distance is not within a range between a previously stored learning value and one of the restriction values.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.