EP 0481975 B1 19931006 - PROCESS AND DEVICE FOR LAMBDA VALUE CONTROL
Title (en)
PROCESS AND DEVICE FOR LAMBDA VALUE CONTROL
Publication
Application
Priority
DE 3816558 A 19880514
Abstract (en)
[origin: WO8911030A1] In a process for lambda value control, not only is the actual lambda control value measured by means of a lambda sensor responsive to abrupt charges, in order to determine control deviations, but an averaged lambda value is used as an actual lambda measurement value and compared with a target lambda value. The target lambda value is predetermined on the basis of various operating parameters so that under all operating conditions it is equal to to the lambda value which ensures optimal conversion of all pollutants. When the actual lambda value deviates from the predetermined value, at least one control parameter for the two-point control is modified so as to obtain the desired value. This process and a device for implementing it thereby enable the characteristics of a two-point control to be adjusted under all operating conditions so as to obtain the desired average lambda value for optimal conversion of pollutants.
IPC 1-7
IPC 8 full level
G01M 15/04 (2006.01); F02D 41/14 (2006.01)
CPC (source: EP US)
F02D 41/1441 (2013.01 - EP US)
Designated contracting state (EPC)
DE FR
DOCDB simple family (publication)
WO 8911030 A1 19891116; DE 3816558 A1 19891116; DE 58905859 D1 19931111; EP 0481975 A1 19920429; EP 0481975 B1 19931006; JP 3030040 B2 20000410; JP H03504261 A 19910919; US 5117631 A 19920602
DOCDB simple family (application)
DE 8900292 W 19890510; DE 3816558 A 19880514; DE 58905859 T 19890510; EP 89905392 A 19890510; JP 50509589 A 19890510; US 60230490 A 19901114