US 11,686,261 B2
Process and an apparatus to adjust the ignition timing of an internal combustion engine
Daire James Corrigan, Modena (IT)
Assigned to FERRARI S.p.A., Modena (IT)
Filed by FERRARI S.p.A., Modena (IT)
Filed on Mar. 25, 2022, as Appl. No. 17/704,380.
Claims priority of application No. 102021000007604 (IT), filed on Mar. 29, 2021.
Prior Publication US 2022/0307432 A1, Sep. 29, 2022
Int. Cl. F02P 5/153 (2006.01); F02D 35/02 (2006.01); F02D 13/02 (2006.01); F02D 41/00 (2006.01); F02D 41/30 (2006.01); F02D 41/40 (2006.01); F02P 5/152 (2006.01)
CPC F02D 35/026 (2013.01) [F02D 13/0215 (2013.01); F02D 35/023 (2013.01); F02D 35/027 (2013.01); F02D 41/0047 (2013.01); F02D 41/3029 (2013.01); F02D 41/401 (2013.01); F02D 41/402 (2013.01); F02P 5/153 (2013.01); F02P 5/1521 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A process to adjust the ignition timing of an air-fuel mixture in a combustion chamber (6) of an internal combustion engine (2), the process comprising the steps of
a. determining a first quantity indicative of a pressure of the mixture for a cycle of the engine,
b. determining a second quantity indicative of a speed of the engine (2),
c. determining a third quantity indicative of a first temperature of a conditioning fluid used to thermally condition the combustion chamber (6) at a zone of heat exchange between the engine (2) and the conditioning fluid,
d. providing a heat exchange mathematical model for the combustion chamber (6), the model mapping the set of three quantities, consisting of the first, the second and the third quantity, onto a fourth quantity indicative of a second temperature of a wall portion (3, 5) of the engine (2) around the combustion chamber (6),
e. estimating the fourth quantity by means of the three determined quantities and by means of the mathematical model, and
f. adjusting the ignition timing as a function of the fourth estimated quantity.