Global Patent Index - EP 0930426 A3

EP 0930426 A3 2000-11-08 - Method for pre-setting the reference pressure for an accumulator fuel injection system

Title (en)

Method for pre-setting the reference pressure for an accumulator fuel injection system

Title (de)

Verfahren zur Vorgabe des Einspritzdruck-Sollwertes bei Speichereinspritzsystemen

Title (fr)

Méthode pour prédéterminer la référence de pression d'un système d'injection de carburant avec accumulateur

Publication

EP 0930426 A3 (DE)

Application

EP 98124810 A

Priority

DE 19800940 A

Abstract (en)

[origin: EP0930426A2] The method involves setting the pressure in the rail (18) depending on the operating states of the engine by specifying the demand pressure. Characteristic fields (10,301,302) are used for the injection pressure base value (FUPSPPLBAS) under load, during engine start-up (FUPSPST) and during idling (FUPSPIS). The output of the load-mode characteristic field is applied to the input of a first differential time element (204), whose time characteristic depends on the engine speed. The output of the first time element, the characteristic fields for the start and idle modes and the output of a characteristic field (402) for setting a base time constant are applied to the input of a second time element (401), whose output delivers the injection pressure desired value (FUPSP) for each engine operating state.

IPC 1-7 (main, further and additional classification)

F02D 41/38

IPC 8 full level (invention and additional information)

F02D 41/24 (2006.01); F02D 41/38 (2006.01)

CPC (invention and additional information)

F02D 41/2422 (2013.01); F02D 41/3836 (2013.01); F02D 41/0225 (2013.01); F02D 2041/1432 (2013.01); F02D 2200/0602 (2013.01); F02D 2200/606 (2013.01); F02D 2250/31 (2013.01)

Citation (search report)

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

DOCDB simple family

EP 0930426 A2 19990721; EP 0930426 A3 20001108; EP 0930426 B1 20031203; US 6035829 A 20000314