Saab 9-5

Since 1997 of release

Repair and car operation

The power supply system of diesel engine V6

The general information

At work of the diesel engine in its cylinders pure air which is compressed to a high pressure is soaked up. Thus air temperature rises above temperature of ignition of diesel fuel. Fuel is injected into the cylinder with some advancing and самовоспламеняется. Thus, spark plugs for fuel ignition in the diesel engine are not used.

On the cold engine the temperature of compressed air can not reach value necessary for ignition. In this case additional preliminary warming up is necessary. For this purpose in each cylinder the candle накаливания, heating up the combustion chamber is established. Duration of heating depends on the surrounding temperature and is regulated by the block of management of the engine and the relay of preliminary warming up.

The scheme of power supply systems and release ОГ is presented on an illustration.

The scheme of power supply systems and release ОГ


1 — the Gauge of pressure of forced air 2 — Final port with the gauge of an inclination of shovels 3 — Ventilation картера 4 — the Vacuum pump 5/6 — Forward/back каталитический the converter 7/8 — the Forward/back muffler 9 — the Valve of management of pressure of pressurisation 10 — Gauge IAT	11 — the Filtering element 12 — Gauge MAF 13 — Turbokompressor 14 — Interkuler 15 — the Oil separator of system of ventilation картера (it is built in the engine) 16 — Valve EGR 17 — the Control valve 18 — the Engine

Separately components of system of giving of fuel are designated on an illustration.

The scheme of giving of fuel


1 — the Fuel distributive highway 2 — the Valve отсечки 3 — Atomizers 4,5 — Returnable lines 6,7 — the Valve of management of pressure of fuel 8 — the Fuel pump	9 — the high pressure Party 10 — the Submitting line (from a tank) 11 — the Fuel filter with heating 12 — the Fuel tank 13 — the Gauge of pressure of fuel

Components of an inlet air path are specified in illustrations.

Components of an inlet air path


1 — an air inlet Sleeve 2 — the Air cleaner 3 — the Rubber knee 4 — Gauge MAF	5 — the Connecting tube 6 — Turbokompressor 7 — Connection with интеркулером 8 — Interkuler

Fuel is compressed to pressure necessary for injection in the fuel pump of a high pressure (ТНВД) where it moves the fuel pump from a fuel tank through the fuel filter. Pressure of injection is regulated by the engine management block.

The fuel distributive highway is applied to a supply of fuel from ТНВД to atomizers of separate cylinders.

Diesel engines cope the electronic system similar to a control system by petrol engines. Differences are listed more low.

In a control system of diesel engines the cable of management throttle заслонкой is not used, instead of it the gauge of position of a pedal of the gas, located on a support of a pedal of gas is established. Besides, it is used Д/В brake pedals (Д/В stoplights) which provides decrease in giving of fuel at single turns if the gauge of position of a pedal of gas has failed. The gauge of position of a camshaft (CMP) together with gauge CKP hands over to the block of management the information about ВМТ the piston of the first cylinder. It serves for synchronisation of the moment of ignition and sequence of ignition.