Patent ID: 11959435
Assignee: SAUDI ARABIAN OIL COMPANY
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 17:
18. The method of claim 17, further comprising:
providing an engine operating map defining multiple regions of engine operation, wherein each region defines the ratio of fuel to air provided in the main chamber and the prechamber under different engine parameters, wherein the multiple regions comprise:
a first region defining the stoichiometric ratio of fuel to air under the first set of engine parameters;
a second region defining the stoichiometric ratio of fuel to air under the second set of engine parameters;
a third region defining the ultra-lean ratio of fuel to air under the third set of engine parameters, wherein the third set of engine parameters further comprise:
the engine speed ranging from greater than the first maximum speed to the second maximum speed; and
the engine load ranging from greater than the second maximum load to a third maximum load; and

a fourth region defining the stoichiometric ratio of fuel to air under a fourth set of engine parameters, wherein the fourth set of engine parameters comprise:
the engine speed ranging from greater than the first maximum speed to a fourth maximum speed; and
the engine load ranging from greater than the third maximum load to the first maximum load.