Evaporative fuel processing device
US11193437B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 28, 2021 |
| Grant date | Dec 7, 2021 |
| Priority date | — |
| Expiry date | Jan 28, 2041 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D2200/0602
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A control device transmits an opening degree command amount to an actuator to command an opening degree of a sealing valve. The control device sets a pressure difference between a tank-side pressure and a canister-side pressure to a specified value or more. The control device causes a pressure variable device to change the canister-side pressure to form a state in which the pressure difference becomes equal to or higher than a specified value while the sealing valve is closed. The control device learns a valve opening start amount based on the opening degree command amount when the tank-side pressure changes in response to the opening degree command amount that gradually increases from zero. The control device determines the opening degree command amount based on the valve opening start amount, which has been learned.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.