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Skoda FeliciaSince 1994 of releaseRepair and car operation |
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Shkoda Felitsija + Cars of mark Skoda Felicia + The maintenance instruction + Routine maintenance + Engine repair + Systems of cooling, heating + The power supply system - Engine electric equipment + Charge and start systems - System of ignition of petrol engines The general information Diagnostics of malfunctions of system of ignition and check of a condition of its components Removal and installation of the coil of ignition Removal and installation of the distributor of ignition Check and updating of a corner of an advancing of ignition Removal and installation of information gauges of system of ignition + System of preheat of diesel engines + Coupling + Transmission + Power shafts + Brake system + Suspension bracket and steering + Body and salon furnish + Onboard electric equipment |
System of ignition of petrol engines The general information The scheme of system of ignition with the contactless gauge-distributor
Carburettor models The ignition system is intended for transformation of a current of the low voltage arriving from the storage battery or the generator, to a power-current, and also for giving of it ВВ pressure during the corresponding moments on the spark plugs, setting fire air-fuel a mix in engine cylinders. On carburettor models of considered cars the system of ignition with the contactless gauge-distributor and the switchboard is used. The scheme of such system of ignition is presented on an illustration. In НВ a contour of system of ignition the current proceeds through contacts of the switch of ignition to the plug of "15" coils of ignition, and then - from the plug of "1" coils to the switchboard. In ВВ a contour induced in a secondary winding of the coil of ignition (it is created during the moments of interruption of a current in a primary winding of the coil) the current arrives on the central plug of a cover of the distributor and, further - through бегунок and ВВ wires - on spark plugs. Bosch Mono-Motronic and Magneti-Marelli 1AV The structure of both systems includes four spark plugs, five ВВ wires, the ignition distributor, the electronic coil of ignition, the electronic block of management (ECU), and also the complete set of information gauges, actuation mechanisms and connecting electroconducting. Schemes of placing of components of systems are a little various, however by a principle of functioning of system are almost identical. ECU gives out basic pressure on an entrance step of the coil of ignition, raising a primary winding of the coil. Periodically basic pressure interrupts ECU that conducts to turning of a magnetic field of a primary winding and production ВВ of pressure in the secondary. Further, the high voltage created in the coil through the distributor on ВВ to wires moves on the spark plugs generating a powerful spark on a step of ignition of the piston of each of cylinders. The spark is formed between electrodes of a candle at the moment of giving on it ВВ pressure and provides guaranteed поджиг an air-fuel mix injected into the cylinder. The corner of an advancing of ignition and duration of the closed condition of contacts of the breaker is defined and supervised ECU, proceeding from a control system arriving from gauges of the engine of the information on engine turns, position of a cranked shaft and depth of depression in the inlet pipeline. To number of the other parametres influencing a choice of a corner of an advancing of ignition, position and speed of opening throttle заслонки, temperature of soaked up air and a cooling liquid, and in system Magneti-Marelli, - also a detonation of an air-fuel mix (the information arrives on ECU from corresponding gauges) concern. The control of a detonation of an air-fuel mix is provided on models 1.6 of the l equipped with system of injection Magneti-Marelli 1AV. The detonation gauge is established on the block of cylinders and on increase of vibrations reveals the moment when ignition becomes too early. In due time having received the information from the gauge, ECU makes ignition delay, preventing occurrences of the sound effects connected with a detonation. Further ECU in some stages returns a corner of an advancing of ignition to normal value. In case of repeated occurrence of a detonation the cycle repeats. Management of idling turns is carried out partly by means of the electronic module of position throttle заслонки, the case of a throttle established to a wall, and partly - system of ignition by timely updating of a corner of an advancing of ignition. In view of told, necessity for manual adjustment of turns disappears, | ||||||