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Patent Searching and Data


Title:
METHOD FOR FILTERING A RICHNESS SIGNAL ORIGINATING FROM AN ENGINE EXHAUST SENSOR
Document Type and Number:
WIPO Patent Application WO/2018/202975
Kind Code:
A3
Abstract:
The invention relates to a method for filtering and correcting the richness signal (Upstream sensor meas) measured by a sensor under at least one engine operating condition creating oscillations in the measured richness (Upstream sensor meas) and a modification to a sensor model. The operating condition is identified during earlier tests on the engine relative to the adjustment of the pre-determined richness set value (Sensor rich set value) for the engine, with a value of an engine operating parameter indicating that the condition is in effect being saved. As soon as said at least one value is detected at a given moment in the operation of the engine, a first nominal filtering is suspended and replaced by a second filtering of the measured richness (Upstream sensor meas).

Inventors:
TRAVAILLARD CYRIL (FR)
DAMBRICOURT FREDERIC (FR)
GARNIER GREGOIRE (FR)
Application Number:
FR2018/051016
Publication Date:
January 03, 2019
Filing Date:
April 24, 2018
Export Citation:
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Assignee:
PSA AUTOMOBILES SA (FR)
International Classes:
F02D41/14; F02D41/24
Domestic Patent References:
WO2016051044A12016-04-07
Foreign References:
US5924281A1999-07-20
US6233922B12001-05-22
DE19844994A12000-04-06
US20150046063A12015-02-12
Attorney, Agent or Firm:
BOURGUIGNON, Eric (PSA AUTOMOBILES SA, Propriété Industrielle18 rue des Fauvelles, La Garenne Colombes, 92250, FR)
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