Fuel management for commercial vehicles
Fuel management in commercial vehicles is mainly governed by fuel preparation, i.e., filtration and water disposal. The trend toward a so-called world engine, or engine platform for use in every region of the world, gives rise to considerable technical challenges. On the one hand, the engine must meet the partly strict exhaust gas legislation, which leads to a high level of technological advancement. On the other hand, it is this sophisticated level of technology that is confronted with different biofuel shares and fuel quality levels. It is therefore necessary to enable optimal separation of contaminants and water even under these conditions.
Fuel filter modules for commercial vehicles efficiently prepare diesel fuels for the combustion process. For this purpose, they use high-separation filter media and feature an advanced functionality scope. For diesel engines, the functional range of the MAHLE fuel filter modules can be rather complex. The fuel can be cooled or heated, for example, or the water content of the fuel can be separated.
In order to comply with demanding emissions limits, modern diesel engines typically employ common rail injection systems. These are extremely sensitive to solid particles and diesel fuel containing unsolved water. Since world engines are also used in countries with poor fuel quality and varying shares of biofuel, it is necessary to enable optimal separation of contaminants and water even under these conditions.
For this purpose, MAHLE has developed a solution with the active prefilter module that achieves a separation level of up to 98 percent in new condition.
MAHLE electrical heaters are used in diesel and ethanol engines for cold starting and operation at low ambient temperatures. For diesel engines, they ensure that flowability is maintained and prevent flocculation of fuel components that could lead to clogging of the filter.