6.4.1. General information

During the operation of the diesel engine in its cylinders clean air which contracts to high pressure is soaked up. At the same time air temperature rises higher than temperature of ignition of diesel fuel. Fuel is injected into the cylinder with some advancing and self-ignites. Thus, spark plugs for ignition of fuel in the diesel engine are not used.

On the cold engine 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 glow plug heating the combustion chamber is established. Duration of heating depends on surrounding temperature and is regulated by the control unit of the engine and the relay of preliminary warming up.

The scheme of power supply systems and release of OG is submitted on an illustration.

Scheme of power supply systems and release of OG

1 — the Sensor of pressure of the forced air
2 — Final port with the sensor of an inclination of shovels
3 — Ventilation of a case
4 — the Vacuum pump
5/6 — the Forward/back catalytic converter
7/8 — the Forward/back muffler
9 — the Valve of management of pressurization pressure
10 — the IAT Sensor

11 — the Filtering element
12 — the MAF Sensor
13 — the Turbocompressor
14 — the Intercooler
15 — the Oil separator of system of ventilation of a case (it is built in the engine)
16 — the EGR Valve
17 — the Control valve
18 — the Engine

Separately components of a fuel supply system are designated on an illustration.

Scheme of supply of fuel

1 — the Fuel distributive highway
2 — the cut-off Valve
3 — Nozzles
4,5 — Returnable lines
6,7 — the Valve of management of fuel pressure
8 — the Fuel pump

9 — the Party of high pressure
10 — the Giving line (from a tank)
11 — the Fuel filter with heating
12 — the Fuel tank
13 — the fuel pressure Sensor

Components of an inlet air path are specified illustrations.

Components of an inlet air path

1 — an air inlet Sleeve
2 — the Air cleaner
3 — the Rubber knee
4 — the MAF Sensor

5 — the Connecting tube
6 — the Turbocompressor
7 — Connection with the intercooler
8 — the Intercooler

Fuel compresses up to the pressure, necessary for injection, in the fuel pump of high pressure (FPHP) where it moves the fuel pump from the fuel tank via the fuel filter. Pressure of injection is regulated by the control unit of the engine.

The fuel distributive highway is applied to a fuel supply from TNVD to nozzles of separate cylinders.

Diesel engines are operated the electronic system similar to a control system of petrol engines. Differences are listed below.

In a control system of diesel engines the cable of management of a butterfly valve is not used, instead of it the sensor of position of the accelerator pedal located on an accelerator pedal support is installed. Besides, brake pedal D/V (D/V of stoplights) which provides decrease in supply of fuel at single turns is used if the sensor of position of the accelerator pedal failed. The sensor of position of the camshaft (CMP) together with the CKP sensor transfers to the control unit information on VMT of the piston of the first cylinder. It serves for synchronization of the moment of ignition and the sequence of ignition.