EP 1544443 A1 20050622 - Method of estimating the in cylinder temperature after combustion
Title (en)
Method of estimating the in cylinder temperature after combustion
Title (de)
Methode des Schätzens der im Brennraum befindlichen Temperatur nach der Verbrennung
Title (fr)
Méthode d'estimation de la température dans la chambre de combustion après la combustion
Publication
Application
Priority
JP 2003418644 A 20031216
Abstract (en)
In a combustion temperature estimation method for an internal combustion engine, upon each arrival of fuel injection start timing, the pre-combustion temperature of cylinder interior gas at the time of ignition (ignition-time compressed cylinder interior gas temperature Tpump) is estimated on the basis of the fact that the state of the cylinder interior gas changes adiabatically. The quantity of heat generated as a result of combustion of fuel is divided by the product of the post-combustion mole amount and constant-pressure specific heat of the cylinder interior gas, which can be obtained from the concentration proportions of gas components contained in intake gas, to thereby estimate an increase in temperature of the cylinder interior gas stemming from combustion (combustion ascribable temperature increase DELTA Tburn). Further, an increase in temperature of the cylinder interior gas stemming from an increase in combustion speed (combustion-speed ascribable temperature increase DELTA Tb_velo) is estimated on the basis of fuel injection pressure and engine speed, which are factors which influence the combustion speed. Then, the highest combustion temperature Tflame is estimated by the equation Tflame = Tpump + DELTA Tburn + DELTA Tb_velo. <IMAGE>
IPC 1-7
IPC 8 full level
F02D 35/02 (2006.01); F02D 41/04 (2006.01); F02D 45/00 (2006.01); F02D 41/40 (2006.01); F02P 19/02 (2006.01)
CPC (source: EP)
F02D 35/026 (2013.01); F02D 41/402 (2013.01); F02D 41/403 (2013.01); F02D 41/405 (2013.01); F02P 19/02 (2013.01)
Citation (search report)
- [DA] PATENT ABSTRACTS OF JAPAN vol. 2002, no. 06 4 June 2002 (2002-06-04)
- [A] PATENT ABSTRACTS OF JAPAN vol. 2000, no. 11 3 January 2001 (2001-01-03)
- [A] PATENT ABSTRACTS OF JAPAN vol. 1997, no. 11 28 November 1997 (1997-11-28)
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 1544443 A1 20050622; EP 1544443 B1 20100519; DE 602004027205 D1 20100701; JP 2005180220 A 20050707; JP 3965584 B2 20070829
DOCDB simple family (application)
EP 04029561 A 20041214; DE 602004027205 T 20041214; JP 2003418644 A 20031216