EP 1415079 A1 20040506 - METHOD AND CONTROL UNIT FOR THE FUNCTIONAL DIAGNOSIS OF A FUEL TANK VENTILATION VALVE IN A FUEL TANK SYSTEM, ESPECIALLY IN A MOTOR VEHICLE
Title (en)
METHOD AND CONTROL UNIT FOR THE FUNCTIONAL DIAGNOSIS OF A FUEL TANK VENTILATION VALVE IN A FUEL TANK SYSTEM, ESPECIALLY IN A MOTOR VEHICLE
Title (de)
VERFAHREN UND STEUERGERÄT ZUR FUNKTIONSDIAGNOSE EINES TANKENTLÜFTUNGSVENTILS EINER BRENNSTOFFTANKANLAGE INSBESONDERE EINES KRAFTFAHRZEUGS
Title (fr)
PROCEDE ET APPAREIL DE COMMANDE POUR DIAGNOSTICS DE FONCTIONNEMENT D'UNE SOUPAPE DE VENTILATION DE RESERVOIR D'INSTALLATION DE RESERVOIR DE CARBURANT, NOTAMMENT D'AUTOMOBILE
Publication
Application
Priority
- DE 0202297 W 20020621
- DE 10136183 A 20010725
Abstract (en)
[origin: WO03012278A1] The invention relates to a method for testing the operatibility of a fuel tank ventilation valve (20) disposed in a fuel tank, especially in a motor vehicle, which can be controlled by means of a control unit (21) and which is connected to a suction pipe (16). A pressure source (30) is provided for testing the impermability of the fuel tank system by means of overpressure and underpressure. The operatibility of the fuel tank ventilation valve is carried out by at least one operating variable (102) of the pressure source. In order to achieve a shorter diagnosis period and a diagnosis measurement which is as reliable as possible, the fuel tank ventilation valve is controlled in an open and closed manner and a determined pressure modification (100, 108) is carried out. The at least one operating variable (102) of the pressure source is detected and the detected operating variable is used to decide whether the fuel tank ventilation valve should be open or closed.
IPC 1-7
IPC 8 full level
F02M 25/08 (2006.01); G01M 3/32 (2006.01)
CPC (source: EP US)
F02M 25/0818 (2013.01 - EP US)
Citation (search report)
See references of WO 03012278A1
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
DOCDB simple family (publication)
WO 03012278 A1 20030213; DE 10136183 A1 20030220; DE 50201855 D1 20050127; EP 1415079 A1 20040506; EP 1415079 B1 20041222; JP 2004536998 A 20041209; US 2005034513 A1 20050217; US 7162914 B2 20070116
DOCDB simple family (application)
DE 0202297 W 20020621; DE 10136183 A 20010725; DE 50201855 T 20020621; EP 02754259 A 20020621; JP 2003517436 A 20020621; US 48497404 A 20040913