EP 1348856 A1 20031001 - Digital control apparatus for an engine and control method thereof
Title (en)
Digital control apparatus for an engine and control method thereof
Title (de)
Digitale Steuervorrichtung für eine Brennkraftmaschine und zugehöriges Steuerungsverfahren
Title (fr)
Appareil numérique de contrôle de moteur à combustion interne et méthode correspondante
Publication
Application
Priority
JP 2002086555 A 20020326
Abstract (en)
A control apparatus (40) for an engine (1) comprises roughness control means (46) which sets a control variable (IG; INJ; A/F) for the adjusting means (8, 28, 43, 44) including an injector (28) so as to maintain the combustion stability of the engine (1) within a certain range. The control apparatus (40) further includes: mean deviation measuring means (46a) is provided which measures a mean deviation ( sigma ) of the fluctuation in angular velocity, for a plurality of control variables (IG; INJ; A/F) set by control variable setting means (46d) of the roughness control means (46) under the same operational condition of the engine (1); predictive value calculating means (46d) is provided which calculates a predictive value of the mean deviation ( sigma ) in the case that a control variable (IG; INJ; A/F) for the adjusting means (8, 28, 43, 44) is changed, on the basis of the measured value of the mean deviation ( sigma ) determined for the plural control variables (IG; INJ; A/F); and judging means (46c) is provided which judges of the engine (1) is in the proper combustion condition, from a difference ( beta ) between the predictive value and the measured value of the mean deviation ( sigma ) measured after the change in control variable (IG; INJ; A/F). Accordingly, the accurate determination can be made as to whether the engine (1) is in the stable combustion condition, without any erroneous determination. <IMAGE>
IPC 1-7
IPC 8 full level
F02P 5/15 (2006.01); F02D 41/02 (2006.01); F02D 41/14 (2006.01); F02D 41/22 (2006.01); F02D 43/00 (2006.01); F02D 45/00 (2006.01)
CPC (source: EP)
F02D 41/1408 (2013.01); F02D 41/1498 (2013.01); F02D 2200/1012 (2013.01); F02D 2200/1015 (2013.01)
Citation (applicant)
JP H09264183 A 19971007 - MAZDA MOTOR
Citation (search report)
- [X] US 4562818 A 19860107 - KOHAMA TOKIO [JP], et al
- [X] US 4843556 A 19890627 - WAKEMAN ANTHONY C [GB], et al
- [A] US 5222392 A 19930629 - BABA YASUTOSHI [JP], et al
- [A] US 5652380 A 19970729 - MACHIDA KENICHI [JP]
- [XA] PATENT ABSTRACTS OF JAPAN vol. 009, no. 279 (M - 427) 7 November 1985 (1985-11-07)
- [A] PATENT ABSTRACTS OF JAPAN vol. 007, no. 137 (M - 222) 15 June 1983 (1983-06-15)
- [DA] PATENT ABSTRACTS OF JAPAN vol. 1998, no. 02 30 January 1998 (1998-01-30)
Designated contracting state (EPC)
DE
DOCDB simple family (publication)
DOCDB simple family (application)
EP 03006712 A 20030324; JP 2002086555 A 20020326