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CI Fuel systems - Common rail Flashcards | StudBud
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CI Fuel systems - Common rail
CI Fuel systems - Common rail
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A short quiz to test your knowledge of common rail fuel systems
Flashcards
23 cards
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Questions
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Answers
1
What are the main advantages of the common rail fuel system
Improvements in power, increased noise and emissions
Increased power, lower emissions, fuel consumption and noise
Improvements in power, economy and lower operating pressures
Increased power, emissions and fuel consumption
2
What is the purpose of component A, fitted to vehicles with common rail diesel engines
To pressurise the diesel fuel
To filter the diesel fuel
To cool the diesel fuel
To pump the diesel fuel
3
A vehicle fitted with a common rail fuel system develops a fault, what would you check first
Check for faults using an OBD scan tool
Check the fuel pressure in the rail
Carry out a compression test
Replace the fuel filter
4
The component identified by the letter I is known as a
High pressure pump
Injector
Rail pressure sensor
Common rail
5
The component identified by the letter E is known as a
Fuel filter
Fuel pump
High pressure pump
Fuel lift pump
6
The component identified by the letter B is known as a
Fuel pressure regulator
Fuel stop solenoid
Pressure control valve
Fuel filter
7
The components identified by the letter H are known as a
Engine knock sensor
Engine speed sensors
Lambda sensor
Accelerator pedal (TPS)
8
What is the main safety precaution required when working on common rail fuel systems
Work in a well ventilated area
Depressurise the system before starting work
Fit the correct vehicle protection equipment
Clean up all fuel spillages immediately
9
Common rail fuel systems operate at pressures up to
100,000 KPA
2,500 bar
1500 bar
2,500 PSI
10
The component identified by the letter C is known as a
Fuel pressure regulator
Pressure control valve
Fuel temperature sensor
Rail pressure sensor
11
What lubricates the high pressure pump on a common rail system
The diesel fuel itself lubricates the pump
The high pressure pumps are lubricated by engine coolant
The high pressure pumps have their own lubricating oil
Lubricating oil fed from the engine via a small bore pipe
12
Before common rail was introduced in 1997 most diesel engines were fitted with
A crescent type injector pump
Thermostatically controlled injector pumps
A mechanical distributor or straight injector pump
A mechanical rotary or inline injector pump
13
Which are the two forms of injection
Direct & Indirect
Obstinate & Wishful
Indirect & Direct
Incidental & Occasional
14
Common rail fuel systems use one of two types of injector, which type is shown in this video
Solenoid injector
Piezoelectric injector
15
With regards to CI Engines what are the three phases of combustion
Delay period-Uncontrolled combustion-Controlled combustion
Induction-Controlled combustion-Uncontrolled combustion
Fuel retard-Uncontrolled combustion-Controlled combustion
Compression-Controlled combustion-Uncontrolled combustion
16
Which was the first passenger vehicle (in 1997) to be fitted with a common rail fuel system
Alfa Romeo 156 2.4JTD
Honda Accord CTDi
Volkswagen Passat 2.0Tdi
BMW 3 Series 2.0 Diesel
17
When carrying out a service you should report faults that you find to your supervisor so that
To show your boss that you are observant and knowledgeable
You can't be blamed if the car goes wrong afterwards
The owner can be contacted for permission to do the work
The additional parts can be ordered without delay
18
The component identified by the letter G is known as a
Manifold pressure (MAP)
Accelerator pedal (TPS)
Engine temperature
Mass air flow (MAF)
19
The component identified by the letter F is known as a
Fuel pump relay
Fuel computer
Engine ECU
Fuel solenoid
20
The component identified by the letter A is known as a
Scavenge pump
Low pressure pump
Injector pump
High pressure pump
21
The component identified by the letter D is known as a
Fuel chamber
Rail pressure sensor
Common rail
Fuel rail
22
Which of the following is most likely to provide technical data for a vehicle repair
Owners handbook
Vehicle workshop manual
Job card
MOT testers manual
23
Common rail fuel systems use one of two types of injector, which type is shown in this video
Solenoid injector
Piezoelectric injector