1. The document discusses a 1.5 L DOHE VTEC 4 Stork Naturally Aspirated DI13 engine made by Scania. It describes the engine's specifications and components.
2. Scania is a major Swedish manufacturer of diesel engines for trucks, buses, marine vessels, and industrial applications. The DI13 series are naturally aspirated engines with compression ratios ranging from 16.3:1 to 17.3:1.
3. The document covers the engine's parts, workings, advantages and disadvantages of natural aspiration, cooling systems, maintenance procedures, applications in trucks and buses, and concludes with an overview of the information presented.
4. INTRODUCTION:
The marine engines from Scania.
Scania marine engines are designed for strength and durability.
The basis of the design is an optimized cylinder block with replaceable
water-cooled cylinder liners.
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5. BACKGROUND
Scania AB is a major Swedish
manufacturer headquartered in
Södertälje.
It also manufactures diesel engines for
heavy vehicles as well as marine and
general industrial applications.
Scania was formed in 1911 through the
merger of Södertälje-based Vabis and
Malmö-based Maskinfabriks-
aktiebolaget Scania.
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6. DI13 SERIES
DI13 070 – 078M with a compression ratio of 16.3:1
DI13 080-086/091/092M with a compression ratio of 17.3:1
EC legislation applies to DI13 072M, 077M and 078M
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8. NATURALLY ASPIRATED ENGINE
A naturally-aspirated engine, also known as a normally-aspirated engine, is
an internal combustion engine in which air intake depends solely on
atmospheric pressure and does not have forced induction through a
turbocharger or a supercharger.
In a naturally aspirated engine, air for combustion is drawn into the
engine's cylinders by atmospheric pressure acting against a partial vacuum
that occurs as the piston travels downwards toward bottom dead centre
during the intake stroke.
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9. ADVANTAGES
Easier to maintain
and repair
Lower development
and production
costs
Increased reliability,
partly due to fewer
separate parts
More direct throttle
response (due to the
lack of turbo lag)
Less potential for
overheating
Tend to sound better
(Personal Preference)
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11. DOHC
ENGINE
DOHC stands for Dual Overhead Cam or Double
Overhead cam (there are two cams located over head
operating various intake and exhaust valves).
The DOHC engines usually come in 4 valves.
One camshaft for the intake valves and the other for the
exhaust valves.
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22. Cooling System
Purpose
To remove the waste heat from IC engine, lubricants.
Temperature range ( below freezing point to 50 degrees).
Removes excess heat from the engine.
Maintains the engine operating temperature.
Overheating of lubricants results in the seizure of piston.
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23. Coolants used in Cooling
System
Mineral
Oils
Ester
Oil
Water-
glycol
mixture
Silicon
Oil Air
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25. Preventive Maintenance
Seats and seat belts security
Oil level
Coolant level
First aid kit
Fire Extinguisher
Spare wheel, rim and tire
Wheel Wrench Windshield washer fluid
Stock air filter
Change spark plug every
15000miles
Body panels
Power steering fluid
Brake fluid level
Light and indicators
Wheel allignment
Oil and filter every 3000 miles
Check Wheel nuts
Tire conditions and pressure
Battery and terminals
Pulleys of engine
Fan belts
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26. Corrective Maintenance
When there is a noise problem at starting the engine
When there is a valve retainer problem
When there is a high oil consumption
When there is no proper combustion
When there is low output work of engine
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27. Troubleshooting
Accessibility for troubleshooting:
There must be sufficient space at installation so that standard times for
maintenance and repairs can be attained.
Troubleshooting follows a systematic four-step approach;
1. Identify the problem.
2. Plan a response.
3. Test the solution.
4. Resolve the problem.
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28. .
Troubleshooting
A logical and systematic method for finding root cause of the problem.
Step 1: Check Your Fuel. Do you have fresh, clean fuel in the tank? ...
Step 2: Clean the Carburetor. ...
Step 3: Check the Spark Plug & Possible Ignition Problems. ...
Step 4: Check the Valves.
Mostly engine Problems
Stalling
Ignition switch failure.
Neglecting oil and filter changes
Leakages 28
29. Troubleshooting
Heavy Problems and There Troubleshooting
Broken
Problems
Crack
Seized
Burnt out
Flogged
Hole
You can repair all
type of failures to
being economical.
Different welding
method can be use
for this purpose in
Pakistan. But if you
want the personal
suggestion than
Replace that part.
Pre-ignition
Causing
Heavy load
Thermal fatigue
Insufficient clearance
Friction
Impurity
Solution
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30. Major Overhauling
It life cycle is nearly 15 years but it is not the fix number it depends upon
the usage and mostly it has 20000 running hours because it is naturally
aspirated.
Removal and Disassembly of the Engine
Inspection process
Calibration
Assembly
Check and start engine 30
31. Applications
Scania producing this type of engines and they
produce around 100,000 engine a year use in
• Trucks
• Buses
• Marine
• Industrial
• Power Generation
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32. Conclusion
We Study about the 1.5 L DOHE VTEC 4 Stork Naturally
Aspirated DI13 and we give a brief presentation about it.
In this presentation we start from scratch and discuss it to
advance where we cover the parts, working, Specification,
efficiency, advantages, disadvantages, Cooling systems,
Manufacturers, Maintenance, Overhauling and
applications.
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