Page 30 - ingenioren

Fuel Filtration

Overview
FUEL FILTRATION Fuel System Profile Fuel Filtration Design Considerations

At the end of this publication is a
“tear-out” profile form for you to
To properly apply fuel filter systems
travels through the transfer pump it
use to convey your system needs to
Donaldson engineers. there must be careful consideration of becomes mixed in with the fuel in
smaller droplets (called emulsified
many different factors. Mainly, there
needs to be an understanding of what water). Typical micron (µ) ratings for
The system profile has a list of all is being protected and what level of suction side primary filters vary over a
the design considerations required protection is required. Also, there wide range. Depending on the vehicle,
for proper engineering review to needs to be a general understanding engine and operating environment,
determine which Donaldson fuel of the fuel system, where the filters primary filters rated as low as 7µ
system would be the optimum are going to be placed and what to over 25µ may be employed. The
solution. the operating parameters are. Most efficiency of the primary filter, at a
fuel filters used in the engine fuel minimum, is determined by the pump
• Fuel System Characteristics - fuel filter market are located in one of requirements, but is usually selected
grade, reservoir capacity, fuel flow two positions, primary (pre-filter) or to help balance filter system life.
rates, and temperature secondary (main filter). The illustration
below shows the location and function Secondary filters are usually placed
• Filter change interval of these two separate filters. When between the transfer and high
• System functions - including water applying fuel filters to engines the fuel pressure injection pump. These
separation, fuel heating, drain, filters need to be thought of as a filter filters protect the high pressure fuel
priming pumps, and venting system and how they work together pump and sensitive fuel injection
• Mechanical performance instead of two stand-alone filters. components from damage due to
requirements - pressure, fatigue and particle wear and erosion. Typical
vibration Primary filters are most commonly ratings for secondary filters in high
• Filtration performance and test utilized on the suction side of the fuel pressure common rail fuel systems
conditions transfer pump. This placement allows are in the 4-7µ range.
• Fitting and servicing considerations for protection of the pump while
simultaneously taking advantage
of easier fuel water separation
As with most manufacturers, custom conditions. Water is typically in larger
solutions require minimum annual droplets in the suction side of the
production volumes and a design and system (called coarse water). If water
development phase.

DRAFT - 05 Aug 2010
Electronically Controlled Injectors
High Pressure, Engine
ENGINE fuEl fIltratIoN systEm
applIcatIoN dEsIGN workshEEt Driven Fuel Pump
Common Fuel
This form is intended to be filled out by an engineer Upon receipt of the form, Donaldson will assess
or buyer that interested in a custom FUEL filtration your requirements and get back to you within three
design system. working days. Accumulation Rail
For proper development/design engineering solution, When completed, please forward to Donaldson.
we ask you to provide details about your engine, Email: engine@donaldson.com
project due dates, fuel system and performance Fax: 952-887-3059
(mechanical and filtration), system mounting, service,
final packaging and product markings.
Company Name: Revision:
Project Name: Secondary Fuel
Contact Name: Title
Phone: Fax: Email: Filter
Current Donaldson Model Used: (if applicable) Your Part Number:
Engine Information Fuel Delivery System Brand: __________________
Manufacturer _______________________________ Fuel Flow Rates: ¨ lpm or ¨ gpm
Model ______________________________________ Minimum ______ Normal ______ Maximum ______ Electronic
Displacement _______________________________ Fuel System Pressure (kPa):
Number of Cylinders _________________________ Minimum ______ Normal ______ Maximum ______ Control Unit
Annual Volume _____________________________
Temperature: ¨ º C or ¨ º F
Fuel: Min ______ Normal _______ Max _______
key project dates: Ambient: Min ______ Normal _______ Max ______ (ECU)
Design Proposal: ___________________________ Fuel Heating ¨ Yes ¨ No
Prototype Delivery: __________________________ Watts __________ Voltage __________
Design Freeze: ______________________________ Priming Pump ¨ Yes ¨ No
PPAP: _____________________________________ Air Relief Valve ¨ Yes ¨ No
Start of Production: __________________________
Water Separation __________% Fuel Transfer
fuel system profile Volume (ml)_________ Common Rail Fuel
Water Collection ¨ Bowl ¨ No-bowl
¨ Primary Filtration ¨ Secondary Filtration Water Sensor ¨ Analog ¨ Digital Pump
Fuel Type:
¨ Standard grade ________________________ mechanical performance Filtration System
¨ Biodiesel and max. content Hydrostatic Pressure Resistance (Burst):
__________________ Test Method : _______________________________
¨ Alternative:
_______________________________ Minimum Value: __________________kPA Illustration
More on next page.
Primary
Fuel
Filter
28 • Engine Liquid Filtration www.donaldson.com