E39 series BMW 5

since 1996-2001 of release

Repair and car operation

+ Introduction
+ Maintenance instruction
+ Current leaving and service
+ Engine
+ Systems of cooling, heating
- Power supply system and release
   + Power supply system
   - System of injection of the petrol engine
      Memory of malfunctions
      Security measures and rules of observance of purity at work with injection system
      Work of system of injection
      Check of systems of ignition and injection
      Adjustment of a drive of gas
      Removal and installation of a branch pipe of a butterfly valve
      Removal, check and installation of the valve of adjustment of idling
      Check, removal and installation of the sensor of temperature
      Check of injectors
      Removal and installation of injectors
   + Power supply system of the diesel engine
   + System of production of the fulfilled gases
+ engine Electric equipment
+ Manual transmission
+ Automatic transmission
+ Coupling and power shafts
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment
+ electric equipment Schemes
+ System of onboard diagnostics

System of injection of the petrol engine

General information

Block diagram of system of injection of Motronic (DME)

1 — an adsorber
2 — the locking gate
3 — the valve of ventilation of a fuel tank
4 — a regulator of pressure of fuel
5 — an injector
6 — a pressure zadatchik
7 — the ignition coil
8 — the situation sensor
9, 10 — positions are absent
11 — a measuring instrument of weight of air
12 — the control unit
13 — the sensor of provision of a butterfly valve

14 — an idling regulator
15 — the air temperature sensor
16 — the valve of a retsirkulyatsiya of the fulfilled gases
17 — the fuel filter
18 — the detonation sensor
19 — the sensor of number of turns
20 — the sensor of temperature of the engine
21 — the oxygen sensor
22 — diagnostics tip
23 — diagnostics lamp
24 — the sensor of differential pressure
25 — the fuel pump

Petrol BMW engines have Bosch-Motronic control system. It is the combined electronic system of ignition and the injection, designated as Digitale Motor-Elektronic (DME). Management of systems of ignition and injection is carried out by the general control unit. In the present Chapter the injection system is considered.

The DME system stably works for a long time and does not demand service. Need under repair arises extremely seldom.