The total ignition angle ZW of each cylinder z is composed of cylinder-selective values basic ignition angle GZ determined by engine speed n and load L, knock adjustment angle KNK, in addition to a first adaptation value AD1 and a second adaptation value AD2 common to all cylinders. More specifically, the packet based protocol operates independently of or is capable of encapsulating physical layer protocols such as but not limited to MAC, Ethernet, Ethernet II, HARD or IP. The latch shaft passes through a rotary electrical switch with a hole through its axis of rotation. The chute includes an in-mold tear seam and a hinge for an air bag deployment door and a passageway for guiding an inflating air bag to the deployment door. The first inputoutput channel and the second inputoutput channel are driven independently of each other. The image transferring unit is removable from the casing of the apparatus independently of image forming devices arranged around the photoconductive element other than the image transferring member.