6.5. Systems of electronic control - the general information
Cхема of an arrangement of control units of various systems on Infiniti QX4 cars
The typical electronic control system can be compared on the structure to the central nervous system of a human body where the role of a brain plays the module of management (ESM), and as the nervous terminations information sensors act. Sensors send signals on ESM which analyzes arriving information and develops reciprocal commands for adjustment of the corresponding working parameters. Actually adjustment is carried out by means of different actuation mechanisms one way or another reacting to managements developed by the module command electric signals.
Let's consider the specific example allowing more clearly to imagine a principle of functioning of system: built in in release system the oxygen sensor continuously traces contents level About 2 in a stream of the fulfilled gases of the engine. If percentage of oxygen considerably deviates some entered into memory of system of control value, ESM immediately receives the relevant information and on the basis of its analysis develops command for the corresponding correction of duration of opening of injectors of injection of fuel, carrying out thereby adjustment of structure of an air and fuel mix. Duration of the described procedural cycle makes fractions of a second that provides due efficiency of functioning of system. As a result, efficiency of return of the engine is constantly supported at the greatest possible level.