The ornamental design for an ignitioncoil, as shown and described.
FIG. 1 is a perspective view of an ignition coil showing my new design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a rear elevational view thereof;
FIG. 4 is a left side elevational view thereof;
FIG. 5 is a right side elevational view thereof;
FIG. 6 is a top plan view thereof; and,
FIG. 7 is a bottom plan view thereof.
The broken lines are directed to environment and form no part of the claimed design. The unshaded surfaces in FIGS. 3, 6, and 7 that directly adjoin the claimed solid line edge forms no part of the claimed design.