Patent ID: 9556809
Date: 2017-01-31
CPC Classifications: F02B,F02D,F02M,Y02T

Claim:
1. A method comprising: determining a quantity of exhaust residuals in each cylinder among a plurality of cylinders in an engine, wherein the exhaust residuals comprise a fraction of burnt combustion gases remaining in each cylinder between each engine cycle among a plurality of engine cycles; determining at least one of an intake and exhaust manifolds temperature, at least one of an intake and exhaust manifolds pressure, and a quantity of a first fuel being injected to each cylinder; calculating a characteristic temperature of each cylinder based on the quantity of exhaust residuals, at least one of the intake and exhaust manifolds temperature, at least one of the intake and exhaust manifolds pressure, and the quantity of the first fuel; determining a substitution rate of the first fuel for each cylinder based on the characteristic temperature; and controlling at least one of the quantity of the first fuel, and a quantity of a second fuel being injected to each cylinder based on the determined substitution rate.