Title:
METHOD FOR INTRODUCING A REAGENT INTO AN EXHAUST GAS CHANNEL OF AN INTERNAL COMBUSTION ENGINE AND DEVICE FOR CARRYING OUT SAID METHOD
Document Type and Number:
WIPO Patent Application WO/2005/108753
Kind Code:
A1
Abstract:
The invention relates to a method for introducing a reagent into an exhaust gas channel of an internal combustion engine (10) and to a device for carrying out said method. According to the invention, at least one pressure sensor (20, 22) is diagnosed. In at least one first time interval (t8, t10) in which a stationary pressure state is expected it is checked whether the pressure signal (21, 23) at least approximately corresponds to the stationary pressure (100, 107). In at least one second time interval (t9, t11) in which a pressure change occurs it is checked whether the pressure signal (21, 23) at least approximately corresponds to a predetermined test pressure (104, 108) and/or at least approximately has a predetermined change as compared to the stationary pressure (100, 107). An error signal (72) is output if at least one of the conditions is not met.
Inventors:
GERLACH MICHAEL (DE)
Application Number:
PCT/EP2005/051479
Publication Date:
November 17, 2005
Filing Date:
April 01, 2005
Export Citation:
Assignee:
BOSCH GMBH ROBERT (DE)
GERLACH MICHAEL (DE)
GERLACH MICHAEL (DE)
International Classes:
B01D53/90; B01D53/94; F01N3/20; G01L27/02; (IPC1-7): F01N3/20; G01L27/02; B01D53/90; B01D53/94
Domestic Patent References:
| WO2002101209A1 | 2002-12-19 |
Foreign References:
| DE10139142A1 | 2003-02-20 | |||
| US20020035866A1 | 2002-03-28 | |||
| US6038912A | 2000-03-21 | |||
| US6273120B1 | 2001-08-14 |
Other References:
None
Attorney, Agent or Firm:
ROBERT BOSCH GMBH (Stuttgart, DE)
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