Patent ID: 7706957
Filing Date: 2010-04-27
Classification: F02D,Y02T

Abstract:
1. An apparatus for controlling, in a multiple injection mode, an injector to spray a quantity of fuel into an internal combustion engine in a former injection, and after a target interval period has elapsed, controlling the injector to spray a quantity of fuel into the internal combustion engine in a latter injection, the apparatus comprising: a storing unit configured to store therein a reference fuel spray characteristic of the injector relative to a variable of a target interval period within a usable range determined for the target interval period, the target interval period representing an interval between a stop of a spray of fuel by the injector in the former injection and start of spraying fuel by the injector in the latter injection, the reference fuel spray characteristic at least depending on a quantity of fuel actually sprayed from the injector in the latter injection; an actual fuel spray characteristic obtaining unit configured to obtain an actual fuel spray characteristic of the injector relative to the variable of the target interval period within at least one section in the usable range; a phase difference calculating unit configured to calculate a phase difference between the reference fuel spray characteristic and the obtained actual fuel spray characteristic; and a phase correcting unit configured to shift the reference fuel spray characteristic by the calculated phase difference such that the reference fuel spray characteristic is corrected to approach the obtained actual fuel spray characteristic.