Tank-venting system and motor vehicle having the system as well as a method and an arrangement for checking the operability of the system
US5349935A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 24, 1993 |
| Grant date | Sep 27, 1994 |
| Priority date | — |
| Expiry date | Mar 24, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01M3/3236
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A tank-venting system has the following features: a tank 10; an adsorption filter 13 which is connected to the tank via a tank-connecting line 12 and which has a venting line 14 which can be closed off by a shut-off valve 15; and, a tank-venting valve 16 which is connected to the adsorption filter via a valve line 17; a pressure connection 21 on the valve line close to the tank-venting valve; and, a pressure sensor 11 on the tank. With the aid of this tank-venting system, the following method can be carried out: closing the tank-venting valve and the shut-off valve; supplying compressed air to the pressure connection; measuring the pressure in the tank; and, checking if the pressure satisfies a pregiven pressure condition and determining the tank-venting system as being inoperable in the event that this is not the case. The above system can be reliably checked as to operability with the aid of the above method, since test pressures can be set which lie significantly above the pressures present in a tank-venting system, these pressures occurring without externally applied pressure. The test pressures can be set without the risk of damage to the system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.