Automotive Filters from Bosch
Bosch Filters
Filters are a very important component in any vehicle and its importance is
always underestimated. For cost reasons, many vehicle owners change their
filters less frequently than recommended and thereby damage high-grade technical
components of their vehicle and the jeopardising the occupants in the vehicle
from harmful pollutants.
As a system supplier with expertise in the entire field of engine management,
Bosch Ltd. is aware of the importance of filters. Continuous activities in
research and development consolidates the leading position and the competitive
edge of Bosch Ltd. and Bosch and ensures further developments of innovative and
environmentally compatible filters. The filter range is updated constantly to
incorporate state-of-the-art technology.
Features
- Stable filter paper - Special micro-fibre paper impregnated with phenolic resin
ensures high mechanical, thermal and chemical stability of the filters resulting
in high wet strength and stability.
- Excellent contaminant separation - The porosity of the paper and an even pore
distribution ensures that contaminants are well separated and gives low, flow
resistance.
- Long life - The folded paper has a much larger filter area, which extends the
service life of the filters compared to unfolded paper filters.
- Excellent filter stability - Corrosion-resistant housings of aluminum,
galvanised steel or high-grade plastic connections guarantee high mechanical,
thermal and chemical stability.
- Ultra strong housings - The aluminum and plastic housings are welded through CO2
lasers or ultrasonic and steel housings are welded through double flaring. This
adhesive free process protects the joints from aggressive fuels, oils and
extreme temperature changes.
Petrol Filters
BOSCH Petrol Filters trap even the smallest particles – in the range of a few
thousandths of a millimeter and ensures optimum function and long service life
of the components.
Features
Filter Medium
- The medium used for the filters are of high-grade to ensure that the
contaminants are filtered completely
- Installation - The filters are developed in such a way that they can be
installed with minimum effort
- Filter tightness - The tightness of the filter is secured by an adhesive-free
double flaring – the housing with a rubberised cover outside and rubber sealing
inside
Advantages
- Prevents irregularities in the fuel-feed through well-proven technology and the
optimum pore size of the filter medium
- Best suited for injection system since the complete petrol injection system is
developed and manufactured by Mico and Bosch
- High-resistance against variations in temperatures and aggressive fuels
Diesel Filters
In addition to filtering out contaminants, diesel filters are used to separate
water contained in the diesel fuel.
Since water is heavier than diesel, it collects in the water accumulation
chamber of the diesel filter.
After filtration, the lighter diesel fuel flows to the interior of the filter
towards the outlet.
Types of Diesel Filters
- Cloth Type (Primary)
- Consists of several layers of cloth wound over a layer of link cloth on a
perforated metal tube
- Flow direction - From outside to inside
- Filtered fuel collects in the centre tube and is delivered to the pump
- Removes non-dissolving impurities like dust, foreign particles etc.
- Coil Type (Secondary)
- Consists of a corrugated filter paper around a central
tube with alternative layers glued
- Flow direction - Radial and axial
- Dual
particles are held in the v-shaped folds
- Star Type (Secondary)
- Formed out of
pleated filter paper
- Paper is pleated along the breadth to provide a framework
for filter dust
- Flow direction - Radial from outside to inside
- Filtered fuel
collects at the centre and is delivered to the pump
- Dust particles are deposited
on the filter paper or settle down as sediments at the bottom of the filter
housing
- Removes impurities of less than 2 microns
Advantages
- Integration of
water separation, fuel heating and fuel cooling in one module
- Pressure stability
at very high injection pressures
- Special filter media achieves high storage
capacity and separation of fine particles
- Effective water separation from fuel
prevents corrosion damage
Common Rail Filters
Common Rail Filters from Bosch are
optimised for high injection pressures and low tolerances of the Common Rail
precision technology.
The double-layer filter medium of polyester and cellulose
enables an extremely high absorption of dirt and the highest separation grades.
The filter construction with a radial vee-form filter element results in maximum
water separation.
As a result of the knowhow of Bosch, the diesel systems
developer, it is guaranteed that the Common Rail filters are precisely tailored
to the respective engine and meet the highest requirements of performance and
service life.
Advantages/ Benefits
- Integration of water separation, fuel heating
and fuel cooling in one module
- Pressure stability also with very high injection
pressures
- Special filter media achieve high storage capacity and separation of
finest particles
- Effective water separation from the fuel prevents corrosion
damage
Lub Oil Filters
The engine oil plays a critical function of reducing
friction that occurs during the movement of the engine resulting in power loss
and wear.
In addition, it prevents abrasive particles from coming in contact
with friction surfaces.
Features
- Optimum protection - The filters remove
contaminants such as dust, metal particles, combustion deposits and carbon
particles from the oil and ensures optimum protection of the engine components.
- Rubber seals - The seals in the filters are made of special rubber compounds
that offer special protection against aggressive engine oils ensuring longer
life.
- Anti-drain valve - The anti-drain valve prevents the filter from drying up
when the engine is switched off guaranteeing rapid pressure build-up and instant
lubrication when the engine is restarted.
- Bypass valve - In order to ensure
continuous supply of oil to the engine, the bypass valve opens at a certain
pressure ratio and allows the oil to flow to the engine without being filtered
thus causing less damage than non-flow of oil.
Advantages
- Specially impregnated,
tear-resistant filter medium with large surface provides longer service
intervals and longer life
- The filter prevents premature ageing of oil
Air
Filters
The intake air always contains minute dust particles that can be harmful
for the engine components. These filters ensure only clean air reaches the
combustion chamber.
Features
- Tightness – These air filters are made of special
polyurethane plastic compound that ensures only clean air reaches the combustion
chamber.
- Pulsation resistance – As the result of precision fitting and the high
quality of filter paper, these filters are resistant to air blasts during the
intake process ensuring longer service life to the engine and its components.
Advantages
- Made to measure for specific engines to ensure the right filter for
every engine
- The permeability and degree of separation are tailored to each
other in such a way that the engine is optimally supplied with clean air
Cabin
Filters
Standard Cabin Filters
The Standard Cabin Filters absorb up to 100% of
all pollen, dust particles and harmful substances ensuring clean air in the
cabin.
It is assembled from three layers of fibres with an electro-statically
charged middle layer that ensures that even smallest particles are filtered out
of the air.
Advantages/ Benefits
- Prevention of the growth of microorganisms,
since the filtration medium is resistant against air humidity
- Reliable operation
even with frost and heat
- Higher air quality in the vehicle protects the health
of the vehicle occupants
Active Carbon Cabin Filters
The basic construction of
the active carbon filter is similar to that of the standard filter. An
additional layer of active carbon absorbs harmful and foul-smelling gases such
as ozone, nitrogen, oxides, sulphur dioxide and hydrocarbons.
Standard cabin
filters can be easily replaced by BOSCH Active Carbon Filters of the same
construction without any modifications to the vehicle.
Advantages/ Benefits
- Active carbon cabin filters provide the driver with even more comfort and health
protection through the filtration of foul-smelling harmful gases.