Patent ID: 8113178

Claim:
An apparatus for controlling a quantity of fuel over a common rail diesel engine, the apparatus comprising: a wave speed correction map correcting a wave speed; a first adder multiplying the corrected wave speed by an injection time difference; a base correction map using an output of the first adder and a former injection quantity as input variables; an amplitude map using a following injection quantity and a rail pressure as input variables; a second adder multiplying a base correction map value of the base correction map by an amplitude map value of the amplitude map, and outputting a finally corrected value of the fuel quantity; and a time corrector disposed between the first adder and the base correction map, wherein the time corrector corrects a difference between a calculated valve open/close time and an actual hydraulic valve open/close time on a basis of a result of the first adder, the rail pressure, and a fuel temperature, and outputs a corrected injection time difference as a variable to the base correction map. wherein the time corrector includes: a hydraulic movement correction map using the rail pressure and the fuel temperature as input variables; and a summer summing a hydraulic movement correction map value of the hydraulic movement correction map and the result of the first adder, and outputting the corrected injection time difference as a variable.