| US 7,527,039 B2 | ||
| Fuel injection control apparatus of internal combustion engine | ||
| Yoshiya Yamamura, Kariya (Japan); and Yoshiyasu Ito, Toyota (Japan) | ||
| Assigned to Kabushiki Kaisha Toyota Jidoshokki, Kariya-Shi (Japan); and Toyota Jidosha Kabushiki Kaisha, Toyota-Shi (Japan) | ||
| Filed on Nov. 08, 2007, as Appl. No. 11/983,486. | ||
| Claims priority of application No. 2006-304288 (JP), filed on Nov. 09, 2006. | ||
| Prior Publication US 2008/0140299 A1, Jun. 12, 2008 | ||
| Int. Cl. F02D 41/34 (2006.01); G01M 15/06 (2006.01) | ||
| U.S. Cl. 123—476 [701/105; 73/117.3] | 5 Claims |
| 1. A fuel injection control apparatus of an internal combustion engine having a plurality of cylinders, the apparatus comprising:
a fuel injection apparatus for injecting fuel into the cylinders;
a crank angle detector including a signal rotor having a plurality of tooth portions aligned along the circumference at intervals
of a constant angle and a toothless portion provided in an angular range which is greater than the interval at which the tooth
portions are aligned, wherein the crank angle detector outputs a first signal corresponding to each of the tooth portions
and a second signal corresponding to the toothless portion as the signal rotor rotates; and
a control section for calculating a time required for the signal rotor to rotate by a predetermined angle using a signal outputted
from the crank angle detector and calculating the timing of fuel injection using the calculated time,
wherein the control section selectively carries out a first calculation process for calculating the timing of fuel injection
using the first signal outputted from the crank angle detector and a second calculation process for calculating the timing
of fuel injection using the second signal outputted from the crank angle detector, and
wherein, when carrying out the second calculation process, the control section calculates the timing of fuel injection using
the length of time gained by dividing the length of time gained through detection of the toothless portion by the number of
tooth portions which can be aligned in the toothless portion at the constant intervals.
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