FUEL INJECTION CONTROL DEVICE FOR VARIABLE CYLINDER ENGINE

摘要

PROBLEM TO BE SOLVED: To increase a degree of freedom in a timing when supplying fuel which does not contribute to combustion.

SOLUTION: Sub-injection is allowed in a predetermined first crank angle range A which includes a compression TDC of a piston in a resting cylinder. The first crank angle range A is such that oil dilution due to the deposition of fuel on a bore wall does not occur in the range A or it is in an allowable range if occurring. In a predetermined second crank angle range B which is smaller than the first crank angle range A and includes the compression TDC of the piston in the resting cylinder, the sub-injection is prohibited to suppress unnecessary torque fluctuation and a smoke increase due to natural ignition.

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