Peugeot 307 Diesel Particulate Filter DPF

The DPF is a device mounted on the exhaust line, positioned after the catalytic converter, designed to capture and reduce harmful diesel particulate emissions. On Peugeot 307 diesel engines, it is typically composed of ceramic material or silicon carbide with a filtration threshold of 0.1 micron, efficiently trapping fine soot particles from exhaust gases.

The DPF accumulates soot particles emitted by diesel combustion during low-temperature engine operations such as idling or city driving. Regeneration removes these particles through two main methods:

• Passive regeneration: Happens when exhaust temperatures rise to around 550-600°C during highway or loaded driving. Peugeot adds a special fuel additive to lower this combustion temperature to about 450°C, burning off soot and leaving ash residue in the filter.
• Active regeneration: Triggered when conditions do not allow sufficient temperature rise, the engine management injects additional fuel into the exhaust to increase temperature, enabling soot combustion in the filter.

This process helps maintain filter functionality and reduces engine issues.

The engine control unit (ECU) manages DPF operation and regeneration by monitoring sensors placed before and after the DPF to measure pressure differences. Differential pressure sensors detect soot build-up by measuring changes in exhaust pressure, signaling when regeneration is needed. The system also tracks fuel additive levels and triggers forced regeneration if necessary.

Forced regeneration is a maintenance procedure initiated to clean a heavily clogged DPF:

• The engine runs at idle for about two minutes to warm the exhaust system.
• Engine speed increases to around 4000 RPM with post-injection fueling for enough time to raise the DPF temperature.
• A third post-injection, closer to the main injection, burns fuel during the power stroke to further elevate filter temperature.

During this process, the ECU disables EGR (exhaust gas recirculation) and manages turbo operations to maintain engine torque, and directs intake air to preheating circuits if required.

The ECU schedules regeneration cycles based on driving conditions and soot accumulation. Typically, regeneration occurs every 350 to 800 miles (approximately 560 to 1280 km). Short urban trips may delay regeneration, increasing risk of clogging unless the vehicle is driven under conditions favoring DPF temperature increase.

DPF maintenance includes:

• Performing forced regeneration to clean accumulated soot
• Cleaning or replacing the DPF if damaged or clogged beyond regeneration capability
• Refilling fuel additive reservoir as monitored by the ECU
• Clearing fault codes and resetting the system via diagnostic tools after maintenance

Replacing the DPF is considered an easy operation, but must be done following manufacturer recommendations to ensure system longevity and compliance with emissions policies.

In France and many European countries, it is illegal to remove or disable any certified pollution control device like the DPF on vehicles used on public roads. Article L. 318-3 of the French Code de la Route explicitly prohibits tampering with pollution control systems. Compliance with these legal frameworks is essential to avoid fines and ensure vehicle roadworthiness.

Krosfou offers high-quality, original European-made DPF replacements for Peugeot 307 diesel models, manufactured from INOX 409 stainless steel with premium ceramic substrates. These filters come with a 3-year warranty valid up to 100,000 km under proper use and installation.

• Compatibility includes Peugeot 307 SW 2.0 HDi 90hp (DW10TD engine) and other HDi diesel versions
• Krosfou DPFs meet or exceed manufacturer specifications and European emissions standards
• Professional installation and adherence to maintenance instructions are required for warranty validity

For ordering, installation guidance, or technical support, Krosfou provides expert assistance to ensure reliable service and optimal performance of your DPF system.