Loading patent…
AssigneeHonda Motor Co., Ltd.
InventorsTakahide Mizuno, Yuji Yasui, Hidetaka Maki
Estimating the term…
An air-fuel ratio control system for an internal combustion engine, which is capable of quickly and properly eliminating variation in air-fuel ratio between a plurality of cylinders. The air-fuel ratio control system 1 controls the amount of fuel to be supplied to first to fourth cylinders #1 to #4, on a cylinder-by-cylinder basis, thereby controlling the air-fuel ratio of a mixture supplied to each of the cylinders. A LAF sensor 14 delivers to an ECU 2 an output KACT indicative of the air-fuel ratio of exhaust gases emitted from the cylinders and merged. A cycle filter 23a and a rotation filter 23b filters the output KACT from the LAF sensor 14 such that components in respective bands of a first frequency fr1 and a second frequency fr2 are allowed to pass therethrough. A final fuel injection amount TOUTi is determined, on a cylinder-by-cylinder basis, according to a first filtered value KACT_Fc or a second filtered value KACT_Fr such that the amplitude of the filtered value KACT_Fc or KACT_Fr converges to a predetermined value.
An air-fuel ratio control system for an internal combustion engine, which controls an amount of fuel to be supplied to a plurality of cylinders on a cylinder-by-cylinder basis, thereby controlling an air-fuel ratio of a mixture supplied to each of the cylinders, comprising:
An engine control unit including a control program for causing a computer to control an air-fuel ratio of a mixture supplied to a plurality of cylinders of an internal combustion engine, by controlling an amount of fuel to be supplied to the cylinders, on a cylinder-by-cylinder basis,
A method of controlling an air-fuel ratio of a mixture supplied to each of a plurality of cylinders of an internal combustion engine, by controlling an amount of fuel to be supplied to the cylinders, on a cylinder-by-cylinder basis, comprising the steps of:
Dependencies are inferred from the claim text.