MOVING TOWARDS CLEANER FUELS

7/28/2019 MOVING TOWARDS CLEANER FUELS

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Brig KAMAL RASOOL (

Retd

)

GM TECHNICAL SUPPORT

SIGMA MOTORS LTD, ISLAMABAD


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http://www.missionislam.com/islamicart/wallpaper/images/bismillah3_jpg_jpg.jpg


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SIGMA MOTORS LTD

Sigma Motors was established in 1995 as Land Rover Dealer.

It started assembly of Land Rover Defender in 2004. Over

12000 Defender vehicles are operating in Pakistan.

Sigma has 2S services all over Pakistan, while it has its own 3S

Services at Karachi, Lahore and lslamabad.

SIGMA

MOTORS


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SEQUENCESIGMAMOTORS

Important Fuel Properties Additives as Pour Point Improvers

Sulpher - Emission Standards

Common Rail Fuel System

Effects of Poor Quality Fuel

Ways to Overcome Ill Effects of Contamination

Hazardous Practices Adopted in Cold Areas

Types of Diesel Fuels Inducted in Pak Army Preventive Measures Against Fuel Contamination

Fuel Storage and Supply

Recommendations


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IMPORTANT FUEL PROPERTIESSIGMAMOTORS

Pour Point, is the lowest temperature at which the fuel could

still be poured satisfactorily. The lower the pour point, the more

desirable the fuel is when starting up at cold temperature.

Flash Point, is the lowest temperature at which the fuel gives off

vapors which can ignite. It is dangerous for the fuel to ignite

while in storage, so a high flash point is desirable.

Contamination: All fuels particularly diesel should be free from

sediments and water.


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SULPHER EMISSION STANDARDSSIGMA

MOTORS

EmissionStandards

GasolineS ppm max

Diesel FuelS ppm max

Euro 1 1000 2000 (0.2%)

Euro 2 150 300 (0.03%)

Euro 3 30 50

Euro 4, Euro 5 10 10

Engines achieve improved performance and

lower emissions with higher category fuels.

Ultra Low Sulpher Diesel (ULSD) FuelULSD contains


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Diesel EngineFuel Delivery Common Rail System

1. High-pressure line

2. Leak-off pipe

3. Fuel injection line

4. Fuel injector

5. Pressure limiting valve (2000 Bar)

6. Fuel rail

7. Volume Control Valve (VCV)

8. Fuel pressure sensor9. Fuel temperature sensor

10. High-pressure fuel pump(1600 Bar)

11. Fuel return

SIGMA

MOTORS


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EFFECTS OF POOR QUALITY FUELSIGMAMOTORS

( Samples of fuel retrieved from some vehicles )

( Volume Control Valve ) ( Pressure Relieve Valve ) ( Fuel Filter/ Sedimentor)

Sedimentsjams/ blocks these components preventing engine starting

Dirty Fuel will wear fuel injection eqpt and cause loss of power, produce smoke andmake starting difficult


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Several products are available in the market with different brand names for the

following purposes: -

a. Fuel/ Air Induction Service

b. Diesel Injection Service

c. Drive Line Service

Sigma service centers have been effectively using following BG products, withexcellent results: -a. BG Quick Clean for Engines restores power and performance to an engine by

rapidly removing accumulated deposits that form in the piston ring belt, rocker

arms etc.

Add BG Quick Clean to the oil, then run engine for 10-15 minutes. When the oldoil is drained, contaminants are quickly flushed away.

b. BG Diesel Care is a highly effective cleaner which quickly decarbonizes diesel

fuel injection systems.

It is designed for the new electronically controlled common rail systems using

direct injection, as well as traditional mechanical fuel injection systems.

WAYS TO OVERCOME ILL EFFECTS OF

FUEL / OIL CONTAMINATIONSIGMAMOTORS


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HAZARDOUS PRACTICES ADOPTED IN COLD AREASSIGMA

MOTORS

Following practices are being followed at Gilgit, Skardu and

surrounding areas: -

Heating the fuel tanks / engine sumps for heating the diesel fuel

prior to starting the vehicles in the morning.

To overcome the freezing of moisture in diesel in the fuel tanks /

pipes etc or to overcome issues related to Pour Point , vehicles

should be parked under cover at night to facilitate starting in the

morning; however, such cover is not generally available.

Therefore, at times fuel is directly heated in pots and then

poured in the fuel tanks which is very hazardous.


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TYPES OF DIESEL FUELS

Inducted in Pakistan ArmySIGMAMOTORS

47 Cetane 40 Pour Pt (47/40)Dieso 4 C

47 Cetane 20 Pour Pt (47/20)Dieso -7 C

47 Cetane zero pour Pt (47/0)Dieso -18 C

For extreme cold conditions as experienced in Gilgit Baltistan area,

diesel fuel (47/0) Dieso is recommended for use in diesel vehicles in

winters.

Above diesel fuels should be made available in the country for cold

areas.


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PREVENTIVE MEASURESAGAINST CONTAMINATED FUEL

SIGMA

MOTORS

Avoid using contaminated diesel fuel directly from jericans

Fuel should be filled from pumps

Where use of jericans is unavoidable, the fuel should be

filtered prior to filling in the fuel tanks, preferably by usingchamois cloth.

Drivers should remove the water & sediments from the

sedimentor at least once a week.

Above precautions will extend the life of diesel injectors and

other components in the fuel system.


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FUEL STORAGE & SUPPLYSIGMAMOTORS

Jericans

Bowzers Fuel Tanks

Fuel Pumping Stations


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RECOMMENDATIONSSIGMAMOTORS

Diesel fuel specifications should be revised particularly with

respect to sulpher content to meet international EURO standard

as well as to enhance engine life.

Winterized fuel should be made available in cold areas.

BG products may be used for flushing vehicle engine, in order

to reduce overhauling cost.

Fuel filter should be changed earlier than the period specifiedby manufacturers.


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Documents

MOVING TOWARDS CLEANER FUELS