Prosil bi za prevod tegale prispevka. Imam Mazdo 6 140D in ne vem od česa so odvisni očiščevalni ciklusi DPF filtra.
Diesel particulate filter System – Euro Stage IV Compliance
These engine technologies are combined with a new catalyzed diesel particulate filter system that reduces PM emissions to almost zero and ensures Euro Stage IV compliance and lower operating costs in most countries. The system captures PM in a silicon carbide ceramic filter with a honeycomb structure consisting of square channels, arranged in staggered formation and closed off at alternative ends. PM contained in the exhaust gas accumulates at the porous dividing walls, while gases pass through the filter.
To prevent the filter from becoming blocked with PM, it must be “regenerated�? at certain intervals. With the aid of a pressure-difference sensor located at the bulkhead of the engine compartment which measures the pressure difference in the exhaust gas flow upstream and downstream from the diesel particulate filter, three exhaust gas temperature sensors and an O2 sensor, the powertrain control module (PCM) monitors the PM amount in the filter. When filter capacity is reached, the PCM in conjunction with the common-rail injection system initiates burn-off of the accumulated particulates in the filter by injecting small amounts of fuel during the exhaust cycle and raising exhaust gas temperatures for a short period. Further measures to increase the exhaust gas temperature include closing the EGR valve and the intake shutter valve.
The new Mazda5 diesel uses a catalyzed diesel particulate filter with channels in the filter coated with platinum. This coating lowers the light-off temperature of the collected PM and allows filter regeneration at a lower exhaust gas temperature of 350 to 500 C° (depending on engine operating conditions). By using a catalytic diesel particulate filter, Mazda5 does not need a special fuel additive to reduce the light-off temperature, as some cars do, making the filter system maintenance-free.
To achieve the exhaust gas temperature required to burn off PM during the regeneration process, the amount of fuel injection is increased. However, the regeneration process of the diesel particulate filter represents a marginal part of total engine operating time, so its impact upon overall fuel consumption is minimal. Mazda5’s diesel derivatives with diesel particulate filter system meet strict Euro Stage IV emission standards while using only 6.3 litres of fuel per 100 km (combined) and producing 173 g/km of CO2.
Mazda5’s diesel particulate filter system is able to regenerate itself under normal driving conditions that combine a mixture of urban and extraurban driving. However, in highly unusual conditions (like continuous days of ultra-low speed driving) a diesel particulate filter indicator light on the dashboard will indicate that regeneration is required. The car should then be driven at a normal speed for 10 to 15 minutes (at an engine speed of 2000 rpm or higher and a vehicle speed of 40 km/h or more) to regenerate the filter.
