Purge system malfunction diagnosis device
US10774790B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 4, 2019 |
| Grant date | Sep 15, 2020 |
| Priority date | — |
| Expiry date | Mar 30, 2039 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A purge system malfunction diagnosis device is configured to diagnose a malfunction in a purge system mounted on a vehicle configured to execute an idling stop control. The system includes a canister, a purge passage, a purge valve capable of opening and closing the purge passage, an outside air passage that causes the canister to communicate with an outside air opening, an outside air valve capable of opening and closing the outside air passage by being driven using an electric power supplied from a battery, and a system pressure sensor that detects a pressure in the purge system. In a state where the outside air passage is closed, a diagnosis mode is executed on a basis of a relationship between the pressure in the purge system and an integrated value of flow rate estimates of a purge gas, and the diagnosis mode is prohibited on a basis of a voltage of the battery.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.