| 摘要 |
PROBLEM TO BE SOLVED: To provide an injection delay detection device capable of detecting an injection delay time in an easy method.SOLUTION: An injection delay detection device includes: generation means for generating a comparison voltage which rises linearly with an elapsed time; comparison means for comparing a coil voltage which varies with a current flowing through a coil with the comparison voltage; detection means for detecting a variation period t12 in which the coil voltage varies a value larger than the comparison voltage to a value smaller than the comparison voltage based upon the comparison result of the comparison means; and calculation means for calculating a delay time Td from the start of power supply to the coil to the start of a valve opening action based upon the variation period t12 detected by the detection means. |
