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Fuel Injections > Fuel Injections > Flashcards

Fuel Injections Flashcards

1
Q

Lubricating Properties

A

the lubricating quality of fuel must help reduce engine and fuel system wear

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2
Q

Operation during low temperature conditions

A

diesel fules contain wax like molecules, that solidify at low temperatures

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3
Q

good fuel economy

A

increasing density of fuel will increase its heat contact and improve fuel economy

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4
Q

starting ease

A

diesel fuel needs to ignite at low temperatures and pressure found in the combustion chamber during cranking

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5
Q

Flash point

A

the temperature where fuel must be heated to produce a vapour that will ignite when exposed to sparks or open flame

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6
Q

Two types of nozzles

A

Hole and Pintle

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7
Q

Cetane Fuel

A

Runs good in cold weather

Diesel rating

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8
Q

Octane Fuel

A

Gas Rating

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9
Q

Winter Fuel Pour Point

A

-44C

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10
Q

Summer Fuel Pour Point

A

-23C

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11
Q

Volatility

A

How quickly something vaporizes than burns

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12
Q

Stoichiometric

A

(Air/Fuel mix) makes sure all fuel burns

14.7:1 = Gas

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13
Q

Isopropyl Alcohol

A 
Helps diesel fuel not freeze 
Absorbs water (Base for diesel Additives)
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14
Q

Cloud Point

A

Temperature at which wax begins to give fuel a hazy or milky look (plugs filters with wax Particles)

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15
Q

Ratio for Air to fuel

A

20:1

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16
Q

White smoke

A

Happens when cranking engine

Un burned fuel

17
Q

Black smoke

A

Over burned fuel
Air to fuel Mixture is wrong
too much fuel too little air

18
Q

Blue smoke

A

Occurs from oil contamination

19
Q

Swirl

A

Helps combustion and mix fuel in cylinder

20
Q

Port closure

A

Is the beginning of injection

21
Q

Fuel Metering

A

Measures the correct quantity of fuel required for any given engine speed

22
Q

Actions occurring in the injector

A

pressure and metering

23
Q

Paraffin

A

wax-like compound

24
Q

Effective Stroke

A

The time the plunger is injecting

25
Q

Auto-ignition temperature

A

The temperature at which fuel will ignite when heated

26
Q

Lubricity

A

A fuel’s lubricating quality

Fuel Injections (3 decks)

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