Scania DI09 Fuel system Installation Manual

Scania DI09 Fuel system Installation Manual
Scania Marine engines DI09, DI13, DI16 Fuel system Installation Manual

Scania Fuel Tank Position
Scania Marine engines DI09, DI13, DI16 If the fuel tank is placed higher than the engine feed pump, a shut-off cock should be installed in the fuel line to the feed pump. During downtime, this cock should be closed. Maximum permitted fuel level in the fuel tank is 3.5 m in relation to the feed pump.

The fuel tank must not be positioned so low that the vacuum in feed pump suction pipe is greater than 0.3 bar. The risk of air leaks in the suction pipe increases with increased vacuum. See also the section Flow and pressure, scania trucks,trucks scania,scania trucking,scania cars,scania car,scania truck usa.

If the fuel tank is mounted so low that the maximum permissible vacuum is exceeded, or if a large fuel tank is required which cannot be mounted close to the engine, a buffer tank must be installed at a suitable distance and height. A feed pump must be fitted directly downstream of the tank. The flow for the auxiliary feed pump must be minimum 15% higher than the flows specified in the Feed pump flow rates section.

If a reliable and quick starting response is required, the buffer tank should be positioned adjacent to the engine with the lowest fuel level at the same level as the feed pump. If the fuel tank(s) are built in, the space should be well ventilated. The fuel tank should normally be drained once a year, but this may vary depending on the quality of the fuel.

Example of a fuel tank installation.
1. Bleed pipe.
2. Fuel filler pipe with filler cap.
3. Lead-through sleeve of fuel-resistant rubber.
4. Inspection hatch.
5. Baffle plate.
6. Fuel cocks.
7. Prefilter.
8. Drain tap for sludge and water.
9. Suction pipe with strainer.
10.Return pipe. Note: For XPI engines, it should enter below the lowest fuel level.
11. Ground connection.

Fuel grade and power for PDE engines
Different fuel properties such as viscosity, density and temperature influence the power available from the engine. See the charts on the next page. The listed engine power assumes fuel with a density of 0.84 kg/dm3 and specific calorific value of 42,700 kJ/kg at a fuel temperature of 15°C.

Since it is difficult to measure the exact calorific value for the fuel in question, viscosity, density and temperature can be used instead to obtain a corrected engine power as a percentage for each of the properties.

The read corrected engine powers as a percentage from the figures must first be added together to obtain the final corrected engine power. Multiply this with Scania's specified engine power to obtain the corrected engine power in kW. Then add or subtract from Scania's specified engine power to obtain the corrected engine power within the given tolerances.

If you have measured the current engine power for a particular engine instead and wish to convert it to normal power, change the sign in front of the corrected engine power in the charts.

0 comments

Leave a Reply

Your email address will not be published.Required fields are marked *