| 摘要 |
<P>PROBLEM TO BE SOLVED: To properly set a frequency of divided injection when a temperature of an internal combustion engine is low, etc., in an injection control device of a direct injection internal combustion engine. <P>SOLUTION: The injection control device 50 of the direct injection internal combustion engine includes: a dimensionless-distance calculation processing unit 52 for calculating a dimensionless distance where a distance from a fuel injection valve to a collision wall surface with which injected fuel collides is made to be dimensionless; a dimensionless-adhesion-length calculation processing unit 54 for calculating in advance a relation between the frequency and the dimensionless distance, in a dimensionless adhesion length where the sum of a length of fuel which is injected by the divided injection and adheres on the collision wall surface is made to be dimensionless; and a division frequency calculation processing unit 56 for calculating the frequency corresponding to the dimensionless distance of one fuel injection per cycle, on the basis of the relation between the frequency and the dimensionless distance when a target of a dimensionless adhesion length which is arbitrarily-set in advance is taken as the dimensionless adhesion length. <P>COPYRIGHT: (C)2012,JPO&INPIT |
