Detonation adjustment The detonation ignition arising in the event that the moment of ignition it is established with too big advancing, harms to the engine. Its consequence are an overheat, damages of bearings and pistons. On the other hand, the biggest exit of capacity of the engine happens when the ignition moment is established with the maximum advancing, i.e. the engine rigidly works on detonation border. This border of a detonation is influenced by too numerous factors (quality of fuel, adjournment in combustion chambers and so forth) that it could be defined precisely in advance. Therefore at traditional installation of ignition it is necessary to have big «safety distance» or «a supervision post» which establishes – if there is a detonation combustion – detonation regulation. Function of adjustment of a detonation Combustion in cylinders is supervised by a so-called sensor control of a detonation which is screwed at the left on the engine block. Two sensor controls are established in engines with working volume 1,8 l (at the left on the block) and in six-cylinder engines (on the right and at the left above on the block). The detonation sensor control "feels", when combustion in cylinders instead of usual uniform fluctuations gives a picture of non-uniform fluctuations. The sensor control transfers this information in the electronic block of management. There there is a following: at signal receipt «detonation combustion at last ignition» the following on turn cylinders continue to receive the moment of ignition calculated for them. But in that cylinder where the detonation has been established, the ignition moment moves approximately on 3 ° back. As it is noticed above, it occurs only in one cylinder. In others the moment of ignition calculated originally remains. If detonation combustion in the given cylinder has remained, at a following working step the ignition moment again moves back on 3 °. It can be carried out a maximum to 15 ° (a reference point the nominal moment of ignition is). If in the corresponding cylinder ignition occurs again normally through short time the ignition moment again moves towards an advancing. It becomes approximately on 0,5 °, then the pause in some working steps while again there is no displacement on 0,5 ° towards an advancing follows. It proceeds until will reach originally planned moment of ignition or while the detonation sensor control again will not give a signal about detonation combustion.