Diesel Engine Speed, Fuel, Controls, and Protection Flashcards

1
Q

The Control of a Diesel Engine is accomplished through what components?

A

Camshaft
Fuel Injector
Governor

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
1
Q

It provides the timing needed to properly inject the fuel

A

Camshaft

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

It provides the component that meters and injects the fuel

A

Fuel Injector

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

It regulates the amount of fuel that the injector is to inject

A

Governor

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Together, these _______________ ensure that the engine runs at the desired speed

A

Three major components

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Each cylinder has a fuel injector designed to meter and inject fuel into the cylinder at the proper instant. To accomplish this function, the injectors are _______?

A

Actuated by the engine’s camshaft

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

The amount of fuel to be injected by each injector is set by a mechanical linkage called the?

A

Fuel Rack

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

The fuel rack position is controlled by the engine’s _______?

A

Governor

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

The governor provides the engine with the _____ _____ to change speed as needed and to maintain a speed once reached.

A

Feedback Mechanism

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

A governor is essentially a _________, designed to maintain a constant engine speed regardless of _______.

A

Speed-sensitive device
Load Variations

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Governors may be classified as?

A

Speed regulating Governors

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

In an engine that is required to come up and run at only a single speed regardless of load, the governor is called a?

A

Constant-speed type governor

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

If the engine is manually controlled or controlled by an outside device with engine speed being controlled over a range, the governor is called?

A

Variable-speed type governor

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

If the engine is designed to keep the engine speed above a minimum and below a maximum, then the governor is a?

A

Speed limiting type

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

This type of governor limits fuel to ensure that the engine is not loaded above a specified limit

A

Load-limiting type

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Common starting circuit of a diesel engine

A

Air motors, electric motors, hydraulic motors, and manual

16
Q

The start circuit can be a?

A

Manual start pushbutton or a complex auto-start circuit

17
Q

The following events must occur for the starting engine to start.

A
  1. The start signal is sent to the starting motor
  2. The starting motor will crank the engine
  3. The engine will then accelerate to idle speed.
18
Q

It is located in the cylinder head of the combustion chamber and uses electricity to heat up the electrode. The heat added by it helps ignite the fuel in a cold engine

A

Glow plug

19
Q

Large engines usually heat the block or have a?

A

Powerful starting motor

20
Q

Some large engines use _________ that inject compressed air into the cylinders which rotates the engine during the start sequence.

A

Air start manifolds

21
Q

It is a type of mechanical flyweight that will act to cut off fuel to the engine and alarm at a certain rpm.

A

Overspeed device (alarm/trip)

22
Q

It provides early warning of abnormal engine temperature, usually an alarm function only.

A

High water jacket temperature (alarm)

23
Q

It indicates an overloading of the engine or possible poor performance due to inadequate scavenging (cooling effect) in the engine

A

High exhaust temperature (alarm)

24
Q

It provides setpoints to indicate low pressure in an engine. One setpoint provides early warning of abnormal oil pressure, an alarm function only. The second setpoint can be set to shut down the engine before permanent damage is done.

A

Low lube oil pressure (alarm/trip)

25
Q

It is usually caused by excessive blow-by (gas pressure in the cylinder blowing by the piston rings and into the crankcase). The high-pressure condition indicates the engine is in poor condition.

A

High crankcase pressure (alarm)