Global Patent Index - EP 3234328 A1

EP 3234328 A1 2017-10-25 - METHOD AND DEVICE FOR DIAGNOSING A FUEL DELIVERY SYSTEM

Title (en)

METHOD AND DEVICE FOR DIAGNOSING A FUEL DELIVERY SYSTEM

Title (de)

VERFAHREN UND VORRICHTUNG ZUR DIAGNOSE EINES KRAFTSTOFFFÖRDERSYSTEMS

Title (fr)

PROCÉDÉ ET DISPOSITIF DE DIAGNOSTIC D'UN SYSTÈME DE REFOULEMENT DE CARBURANT

Publication

EP 3234328 A1 (DE)

Application

EP 15788063 A

Priority

  • DE 102014226565 A
  • EP 2015075538 W

Abstract (en)

[origin: WO2016096229A1] The invention relates to a method for testing an electrically activated actuator in a fuel delivery device (10) of an internal combustion engine, wherein the electrical actuator is a controllable valve (15) that is arranged on the inlet side of a high-pressure pump (16). The high-pressure pump (16) conveys fuel into a fuel store (17) having a pressure controller (20). The fuel store (17) is connected to at least one injector (23). The method comprises the following steps: 1) increasing the rotational speed of the high-pressure pump (16), 2) activating the controllable valve (15) until the pressure in the fuel store (17) has reached a first low pressure level, 3) changing the supply of current to the controllable valve (15) by a first specified value such that the controllable valve (15) is opened further and simultaneously maximizing an injection amount by means of the at least one injector (23) until the pressure in the fuel store (17) has reached a first threshold value, 4) activating the controllable valve (15) until the pressure in the fuel store (17) has reached the first low pressure level again, 5) determining a further quantity, which depends on the low pressure level and a maximum value of the pressure that was reached in the fuel store (17).

IPC 8 full level (invention and additional information)

F02D 41/22 (2006.01); F02D 35/00 (2006.01); F02D 41/38 (2006.01)

CPC (invention and additional information)

F02M 65/003 (2013.01); F02D 41/221 (2013.01); F02D 41/3809 (2013.01); F02D 41/3845 (2013.01); F02M 63/023 (2013.01); F02D 41/266 (2013.01); F02D 2041/224 (2013.01); F02D 2200/0602 (2013.01)

Designated contracting state (EPC)

AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

Designated extension state (EPC)

BA ME

EPO simple patent family

DE 102014226565 A1 20160623; CN 107110101 A 20170829; EP 3234328 A1 20171025; US 2017350359 A1 20171207; WO 2016096229 A1 20160623

INPADOC legal status


2018-03-28 [DAV] REQUEST FOR VALIDATION OF THE EUROPEAN PATENT (IN ANY COUNTRY) (DELETED)

2018-03-28 [DAX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT (TO ANY COUNTRY) (DELETED)

2017-10-25 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20170719

2017-10-25 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

2017-10-25 [AV] REQUEST FOR VALIDATION OF THE EUROPEAN PATENT IN:

- Countries: MA MD

2017-10-25 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO:

- Countries: BA ME