BFI Additives

The cost of refilling the Anti pollution System (FAP) from a main dealer can be

very costly.

At Diesel Diagnostics MK LTD we have the knowledge and expertese to refill the unit at reduced cost.

For more information and costings please call 01908 618815.

Filtre a' particulate (FAP)

Particulate Filter

The particle filter system consists of the following:

A housing containing the pre-catalyst and filter. The filter is a porous block of silicon carbide that traps all particles in the exhaust gases. Sensors monitor clogging pressure across the filter and the gas temperatures at the inlet and outlet of the system.

A software programme in the engine control unit that controls regeneration of the filter by post-injection every 250 to 350 miles depending on the clogging pressure across the filter. The software also provides diagnostic information on the system. During regeneration, the inlet air is no longer cooled by passing through the air-air intercooler but is instead heated to raise the temperature of the mixture in the combustion chamber with a consequent increase in the temperature of the exhaust gases.

A fuel additive system consisting of a probe tube, a system to inject Eolys into the main fuel tank and a dedicated electronic controller. The Eolys is stored in a tank adjacent to the main fuel tank and injected in proportion to the volume of fuel added during refuelling. For example, when filling up with 60 litres of fuel, the system will inject 37.5 ml of solution containing 1.9 g of cerine. The Eolys tank has a capacity of 5 litres, sufficient for 50,000 miles.

1. Particulate 'Filter and Pre-catalyst' filter assembly

2. Temperature and pressure sensors

3. Engine ECU

4. Injection of additives into the fuel in the main tank if necessary

5. Specific information sent to injector head when post-combustion needed

6. Pre-catalyser

7. Particulate filter

Emission control

Exhaust gases are recycled to minimise release of NOx (nitrogen oxides). The emission control subsystem consists of three main components:

1. An exhaust gas recirculation (EGR) valve (proportional solenoid valve controlled by the engine control system) recirculates some of the exhaust gases back to the engine.

2. Air inlet.

3. A butterfly valve located in the air inlet is controlled by the engine control unit to adjust airflow according to engine speed, load and temperature.

Because of the high injection pressure, no pre-heating is required if the engine is started at ambient temperatures above 0 °C.

The oil-change service interval is 20,000 km if a semi-synthetic oil such as Total 10W40 is used. To book a service please call 01908 618815.

DIESEL DIAGNOSTICS MK Ltd

Milton Keynes Only Independent Diesel Specialists Diagnostic and Service Solutions