Title:
METHOD FOR OPERATING INTERNAL COMBUSTION ENGINES
Document Type and Number:
WIPO Patent Application WO2002073019
Kind Code:
A3
Abstract:
The invention relates to a method for operating an internal combustion engine, in which one operational parameter of said engine is modified in accordance with emission values of the exhaust gas to influence the emission values. According to said method, the emission values of two pollutant components of the exhaust gas, such as CO, NO, NO2, NH3, SO2, H2S, CH4 and/or additional HC components are determined and if the emission value of a first pollutant component exceeds a predetermined maximum threshold value, the value of one operating parameter is modified to reduce the emission value of the first pollutant component, whereby an increase in the emission value is permitted for at least the second pollutant component up to a maximum value. The invention also relates to a method for operating an internal combustion engine comprising a lambda probe, located in the exhaust system, according to which the emission values of two pollutant components of the exhaust gas are used to calibrate the lambda probe. The invention further relates to a method for operating an internal combustion engine, in which the emissions of said engine are used to diagnose the operating condition of the engine. According to said method, the emission values of two pollutant components of the exhaust gas are determined and compared with predefined nominal values and the result of said comparison is used to form a condition signal that is characteristic of the operating condition of the internal combustion engine.
Inventors:
POTT EKKEHARD (DE)
Application Number:
PCT/EP2002/001164
Publication Date:
December 12, 2002
Filing Date:
February 05, 2002
Export Citation:
Assignee:
VOLKSWAGEN AG (DE)
POTT EKKEHARD (DE)
POTT EKKEHARD (DE)
International Classes:
F02D37/00; F02D41/14; F02D41/22; F02D41/24; F02D43/04; (IPC1-7): F02D41/14; F02D41/22
Domestic Patent References:
| WO1990002874A1 | 1990-03-22 |
Foreign References:
| DE19511548A1 | 1996-06-13 | |||
| DE10010041A1 | 2001-09-06 | |||
| US5329764A | 1994-07-19 | |||
| DE19852244C1 | 1999-12-30 | |||
| DE4441432A1 | 1996-05-23 | |||
| DE4125154A1 | 1993-02-04 | |||
| DE19936355A1 | 2001-02-08 | |||
| DE4402850A1 | 1994-08-18 | |||
| US5452576A | 1995-09-26 | |||
| DE4207506A1 | 1993-09-16 | |||
| EP0816820A2 | 1998-01-07 |
Other References:
PATENT ABSTRACTS OF JAPAN vol. 013, no. 327 (M - 854) 24 July 1989 (1989-07-24)
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