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DPF Filters

How it Works a DPF Filter

A DPF filter is a device located in the exhaust system. It is designed for the purpose of removing solid particles generated by diesel engines, basically soot and benzopyrene. Last ones can cause cancer so It is necessary installing the DPF filter in order to satisfy the standard european emissions Euro V and Euro VI. Some automotive makers already install DPF filter in Euro IV cars.

The DPF filters consist on an metalic structure (honeycomb structure) with a ceramic compound inside. In that way it can accumulate the solid particles and let it go outside the clean air. Is is located close to the engine, near the catalyzer, sometimes are the same part, or after the collector as it is shown in the next picture.

When the filter is blocked has to begin the incineration, the regeneration process. During the process the temperature inside the filter is beyond 600 ºC so the oxidation of the particles happens spontaneously in the presence of oxygen. Those temperatures are realized in two techniques:

The first technique is achieved by an additional dose of fuel. A post- combustion of soot is produced, in contact with hot exhaust gases, transforming it into CO2 , H2O and NOx .

The second technique consists of a catalytic additive injection which, mixed with the fuel , reduces the temperature needed to burn the particles trapped in the DPF . This technique is used by the group PSA HDI engines.

When regeneration occurs?

It occurs during driving, when the gases reach a temperature between 250 ºC and 500ºC in the filter. With a driving about 10 minutes at a speed of 100 km / h is sufficient for such regeneration happens. It occurs at regular intervals between 600 and 800 km, depending on the type of driving each vehicle.

This regular cleaning of the filter does not eliminate completely the particles. It is necessary changing the DPF filter between 80,000 and 120,000 kilometers, especially if short trips are made at low speed.

The main Diesel Particulate Filter for your vehicle:

WALKER Reference	BOSAL Reference	Application
73059, 93059, 73069, 93069	95206, 97206	BMW 116, 118, 316 2.0 DIESEL - BMW 118, 120D 2.0 DIESEL
73014, 93014, 73013, 93013, 73011, 93011	95120, 97120, 95126, 97126, 95116, 95121, 97121	CITROEN C2, C3, C4, C5, BERLINGO/ MINI/ 1.6 HDI - CITROEN C4 2.0 HDI - CITROEN C4 2.0 HDI
73007, 93007	95124, 97124	FIAT ULISSE 2.0 HDI - FIAT ULISSE 2.0-2.2 HDI - FIAT 500, PANDA 1.3 FIAT BRAVO , DOBLO 1.9 - FIAT FIORINO,QUBO 1.3 - FIAT GRANDE PUNTO 1.3 - FIAT IDEA 1.3 - FIAT PANDA, 500, DOBLO
73030, 93030, 73032, 93032	95215, 97215, 95213, 97213, 95214, 97214	FORD FOCUS, C-MAX 1.6 D4 - FORD FOCUS, MONDEO, C-MAX, S-MAX, GALAXY 2.0 Tdci
73051, 93051	95120, 97120	GRUPO PSA/ MINI 1.6 HDI
73000, 93000	95108, 97108	LANCIA PHEDRA 2.0 HDI
73030, 93030, 73049, 93049	95215, 97215, 95038	MAZDA 3, VOLVO C30, S40, V50, V70 1.6 D4 - MAZDA 5 2.0 DIESEL
73077, 93077	95211, 97211	NISSAN QASHQAI 2.0 DCI
73019, 93019, 73023, 93023, 73018, 93018, 73022, 93022, 73021, 93021	95201, 97201, 95205, 97205, 95205, 97205, 95209, 97209, 95210, 97210	OPEL ASTRA 1.9 CDTI - OPEL VECTRA C 1.9 CDTI - OPEL VECTRA, SIGNUM 1.9 CDTI - OPEL ZAFIRA 1.9 CDTI
73014, 93104, 73011, 93011, 73001, 93001, 73007, 93007, 73009, 93009, 73000, 93000, 73005, 93005, 73012, 93012, 73006, 93006, 73081, 93081	95120, 97120, 95116, 95121, 97116, 97121, 95219, 97219, 95124, 97124, 95204, 97204, 95108, 97208, 95218, 97218, 95102, 95103, 97103, 95101, 97101, 95100	PEUGEOT 407, 307, 207, 307, 308, 3008, 5008, PARTNER 1.6 HDI - PEUGEOT 307 2.0 HDI PEUGEOT 407 2.0 HDI - PEUGEOT 807 2.0 HDI PEUGEOT 807 2.0-2.2 HDI - PEUGEOT 807 2.0 HDI PEUGEOT 807/EXPERT 2.0 HDI - PEUGEOT 307 2.0 HDI PEUGEOT 406 2.0 2.2 DIESEL - PEUGEOT 607 2.0-2.2 HDI
73016, 93016, 73024, 93024	95217, 97217, 95220, 97220	RENAULT MEGANE, SCENIC 1.9 DCI - RENAULT MEGANE 1.5 DCI
73023, 93023, 73018, 93018	95205, 97205, 95205, 97205	SAAB 93 1.9 TID - SAAB 93 1.9 CDTI
73075, 73109, 93075, 93109	95221, 97221	SUZUKI GRAND VITARA 1.9 DDIS
73030, 93030	95215, 97215	VOLVO C30, S40, V50, V70 1.6 D4