Fuel filters can be designed as:
Petrol carburettor filter
Petrol injection filter
Diesel injection filter
FUNCTION
Their objective is to prevent the premature wear and breakage of the injection system components
- retaining any particle or impurity suspended as dust, rust, etc
- eliminating the water deriving from fuel tank condense
WHEN SHOULD THE FUEL FILTER BE REPLACED
Following the vehicle manufacturer recommendation; however Muller Filter suggests to replace fuel filter at least once per year.
DELAYED OR MISSED REPLACEMENT CAUSES
- breakage of fuel injection system
- wear of fuel injection systems components
- difficult starting caused from irregular fuel burning or irregular fuel flow
- high consume
- less engine power
HOW DOES IT WORK?
The fuel pump aspirates the fuel from the tank and via a fuel filter pumps it to the carburettor/injection system. Fuel Filter prevent that contaminants plug the nozzles causing the engine stutters or stops altogether.
FILTERING MEDIA
Usually fuel filters are manufactured with cellulose filtering media. Faithfully following the specifications of vehicle manufacturers, Muller Filter uses several different types of filtering media to produce its fuel filters.
Pressure drop and filter-life (dust loading capacity) are designed according the OE requirements.
Dedicated to resolve the strict efficiency requirements of New Common Rail Diesel Injection systems, Muller Filter has manufactured a new generation of high efficiency fuel filter using new multi layer media, reinforced with synthetic material.
The results are:
- great dirt holding capacity
- high efficiency
- great water separation
The most relevant technical specifications of filtering media
Technical Specifications Minimum Maximum
Grammage (grs./m²); 80 320
Maximum Pore (µ) 18 60
Micron Rating 90% (µ) 2 20
PETROL
CARBURETTOR FILTER
The
fuel pump aspirates the fuel from
the tank and pumps it in the
filter situated before the
carburettor .
Usually the carburettor filter is
a small element in nylon housing
with connecting pipes ; frequently
the housing is transparent so
contamination can be verify.
The carburettor filter is situated
between tank and carburettor to
prevent that contaminants plug the
nozzles in the carburettor.
The filtration rating is about 20
microns
PETROL
INJECTION FILTER
The
fuel pump is usually mounted in
the tank and pumps fuel via the
filter element to the injectors.
Petrol Filter prevent that
contaminants plug the injector
nozzles .
The element is sited usually in a
metal housing with connecting
pipes or screw nuts .
The filter is mounted at the
underside of the car.
The injection system components
are much sensitive to
contamination, therefore is
necessary that filter element is
finer than the carburettor system.
For this reason filtration rating
is about 5-7 microns
DIESEL
INJECTION FILTER
The
fuel pump aspirates the fuel from
the tank and pumps it to the
high-pressure injection pump via a
diesel filter.
The injection system components
are manufactured with high
precision and working to high
pressure (up to 2500 bar) in the
injection system. Therefore is
required that filter element is
able to retain abrasive particles
as well as water present in the
diesel fuel.
The filter element is mounted in
metal or nylon housing that also
serves as water separator.
The specific weight of water is
higher than diesel fuel so the
water is deposited at the bottom
of the housing to be drained .
In some diesel injection system,
the Diesel filter has automatic
water sensor: when the maximum
water level in the housing filter
is reached, on the dashboard
starts to light up an apposite
lamp which informs the necessity
to drain.
The Diesel filter is located at
the highest circuit point
therefore can catch air bubbles
present in the circuit and drain
them through a unscrew-bolt .
The adoption of new Common Rail
Diesel Injection systems (or
Electronic Unit Injection ),
working to pressure up to 2500
bar, requires highest performance
from Diesel Filter .
Reason for Muller Filter to
develop and manufacture a new
generation of high efficiency
diesel filter media .
This particular media is produced
to pair one or more synthetic
melt-blown media layers on one
distinctive paper media layer,
guarantying greater dirt holding
capacity, higher efficiency, and
improved water emulsion removal
characteristics.
Filtration rating is about 2 to 8
microns.
MULLER FILTER proposes a wide range of filters for the automotive industry, machines and engines, updated with continuous program extension.
Our product line consists in over 1400 types of Fuel , Oil , Air, Cabin Air filters covering about 95 percent of European and Asiatic passenger car and light commercial vehicles applications.
What makes in a Muller filter an elevated performance products of guaranteed quality :
- continuous R & D investments;
- modern production machinery;
- quality control systems according to the international ISO requirements;
- a professional staff with long time experience;
- partners homologated from OE manufacturers;
- a quality policy aimed at environmental protection according to ISO 14001.
MULLER FILTER
