Figure Y— 2203. Motronic system
1 Fuel tank
2 Fuel pump
3 Fuel filter
4 Fuel pressure regulator
5 Electronic control unit
6 Ignition coil
7 High voltage ignition distributor
8 Spark plug
9 Nozzle
10 Throttle valve
11 Throttle switch
12 Air flow meter
13 Potentiometer and air temperature sensor
14 Lambda probe
15 Temperature sensor
16 Idle speed control
17 Inductive pulse sensor
18 Battery
19 Ignition switch
20 Air conditioner switch
BMW engines are equipped with the Motronic system from Bosch, which is a combined electronic ignition and fuel injection system, also called the digital engine management system DME. The ignition and fuel injection systems are controlled by a common control unit. This section mainly describes the part of the system that provides fuel injection.
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