Detonation combustion occurs because of too early moment of ignition. The long detonation can lead to serious damages of internal details of the engine. However in modern motor industry constantly try as it is possible to bring the ignition moment to «early ignition» more close. The ignition system provides clearing of a detonation by updating of a corner of an advancing of ignition. She allows to use the maximum corner of an advancing of ignition in absence of a detonation, providing with that good rideable qualities and the low expense of fuel. For detonation detection in system there is an electric gauge of detonation combustion (one — for the 2,0-litre engine or two — for engine VR6) which is screwed in from below in the block of cylinders and constantly traces process of combustion of fuel in cylinders and registers occurrence in "detonation" cylinders. At occurrence of non-uniform blows the gauge (or gauges) informs on it ЭБУ which carries out the following:

- At once defines, in what cylinder there was a detonation and establishes ignition in it approximately on 3 ° later, leaving size of an advancing of ignition for other cylinders former;

- Other cylinders keep the same moment of ignition, and the moment of ignition of the "guilty" cylinder is late approximately on 3 °.

- If in the detonating cylinder detonation combustion ЭБУ detains the ignition moment for 3 ° still remains. This process can occur some times at the subsequent working steps of the cylinder;

- Only after the detonating cylinder again will earn stably, the ignition moment is again exposed after a while on earlier — at each step of work of the engine, approximately on 0,5 ° until the initial moment of ignition will be again gradually established.

Receipt of the information on detonation combustion in other cylinders is meanwhile possible.