Ignition system — general description The ignition system, by sending a spark in a timely and purposeful manner, ensures the correct combustion of the fuel-air mixture in the engine. And it happens...
When does an air/fuel mixture ignite? The figure illustrates the concept «Top dead center» And «bottom dead center». The space between them is the working volume of the cylinder. On the contrary,...
Various ignition systems The 74 kW engine has a Motronic ignition system with a distributor. In this engine, the ignition is installed, because. adapting the ignition timing to each...
This is how the ignition spark is created The basic principle of ignition is that first the battery current passes through the primary winding of the ignition coil. This winding consists of several...
Executive body of the ignition system End stage A powerful transistor is located in the final stage, it turns on and off the current to the ignition coil (or ignition coils). This prevents high...
Ignition control unit Ignition and injection control are combined in one electronic unit. The ignition timing is also calculated there. The control unit has all possible engine data...
Signals to the control unit Hall Sensor Disassembled Hall sensor of the engine with a displacement of 1.8 liters. The most important details are the Hall integral system (in housing with...
Detonation adjustment Knock ignition, which occurs when the ignition timing is set too far, damages the engine. Its consequence is overheating, damage to bearings and pistons. On...
Be careful with ignition In the engine compartment of the Audi A4, a sticker warns of high voltages in the ignition system, and this is not without reason: even in a thin wire to the...
Work on the ignition system Ignition stop The control unit and the final stage will inevitably fail if the engine is turned by the starter with the high voltage wire disconnected. That's...
Ignition Troubleshooting Anyone who wants to identify a defect in the ignition must act according to the system: Whether there is an ignition spark at all is found out by simply...
Ignition distributor The distributor high voltage wires are connected to the spark plugs according to the ignition sequence in the 1.6L engine. The numbers show which cylinder this...
High voltage node The high voltage assembly of the ignition system, along with the ignition coil and distributor, includes the high voltage wire, the anti-interference connector...
Replacing spark plugs To replace the spark plugs in a 92 kW engine, you need to disconnect the connector (1) on the final power stage and unscrew the final stage together with the...
The right choice of spark plugs Candle designations Use the symbols in the table below to find the correct spark plugs for your Audi A4 model. What is behind the numbers and letters? Heat...
Ignition timing check In Audi ignition systems without a distributor, the ignition timing cannot be adjusted. For distributor ignition with a 74 kW engine, the ignition control is...