EP 3561270 A3 20200115 - METHOD FOR COLLECTING 1-CYCLE DATA FOR OUTPUT MEASUREMENT AND COMBUSTION ANALYSIS OF LARGE-SIZED LOW-SPEED 4-STROKE ENGINE
Title (en)
METHOD FOR COLLECTING 1-CYCLE DATA FOR OUTPUT MEASUREMENT AND COMBUSTION ANALYSIS OF LARGE-SIZED LOW-SPEED 4-STROKE ENGINE
Title (de)
VERFAHREN DER AUFZEICHUNG VON DATEN ÜBER EINEN ZYKLUS ZUR MESSUNG DER LEISTUNG UND ZUR VERBRENNUNGSANALYSE EINES LANGSAMLAUFENDEN 4-TAKT-GROSSMOTORS
Title (fr)
PROCÉDÉ ET ENREGISTREMENT DES DONNÉS PENDANT UN CYCLE MOTEUR POUR MÉSURER LA PUISSANCE ET POUR ANALYSER LA COMBUSTION D'UN MOTEUR 4-TEMPS DE GROSSE CLYINDRÉE
Publication
Application
Priority
KR 20180046998 A 20180423
Abstract (en)
A method for collecting 1-cycle data for output measurement and combustion analysis of a large-sized low-speed 4-stroke engine according to an embodiment of the present disclosure includes: creating a graph about compression pressure of a predetermined reference cylinder at rotation angles of a crankshaft by blocking fuel for the reference cylinder and collecting compression pressure data from the reference cylinder; creating a graph about pressure change rates of the reference cylinder at rotation angles of the crankshaft by differentiating the compression pressure data collected from the reference cylinder with respect to the rotation angle of the crankshaft; detecting the position of a compression TDC from the graph about the compression change rates of the reference cylinder at the rotation angles of the crankshaft, and storing the rotation angle value of the crankshaft corresponding to the detected position of the compression TDC; determining a start position of an intake/exhaust TDC by adding a rotation angle value of the crankshaft corresponding to 0.5 cycles to the rotation angle value of the crankshaft corresponding to the position of the compression TDC; and collecting compression pressure of the reference cylinder at rotation angles of the crankshaft for one cycle from the start position of the intake/exhaust TDC.
IPC 8 full level
F02D 17/02 (2006.01); F02D 35/02 (2006.01); F02D 41/00 (2006.01)
CPC (source: EP KR)
F02D 17/02 (2013.01 - EP KR); F02D 35/023 (2013.01 - EP KR); F02D 39/02 (2013.01 - KR); F02D 41/0087 (2013.01 - EP); F02D 41/009 (2013.01 - EP KR); F02D 2400/04 (2013.01 - EP)
Citation (search report)
- [XI] US 2009178473 A1 20090716 - HOSHI SHINYA [JP], et al
- [XI] WO 2004048762 A1 20040610 - RICARDO CONSULTING ENG [GB], et al
- [I] US 2008249677 A1 20081009 - KRUGER DUANE D [US]
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
EP 3561270 A2 20191030; EP 3561270 A3 20200115; JP 2019190462 A 20191031; JP 6760587 B2 20200923; KR 101913070 B1 20181029
DOCDB simple family (application)
EP 19170459 A 20190423; JP 2019082249 A 20190423; KR 20180046998 A 20180423