Wednesday April 11th, 2018 Flashcards Preview

Fuel Injections > Wednesday April 11th, 2018 > Flashcards

Flashcards in Wednesday April 11th, 2018 Deck (14):
1

Managing air-fuel ratio controls

Minimizes the production of PM emissions or black smoke during acceleration.

2

What is "Droop" ?

The change or difference in engine speed caused by a change in load.

3

Definition of "Hunting" ?

A rhythmic change in engine rpm at idle speed caused by uneven feeling of cylinders.

4

What are Mechanical Governors ?

Regulates the quantity of fuel I injected by the high pressure injection pump using fly weights and spring

5

Governor Spring Force

A throttle lever connected to the governor adds or removes tension.

6

What is "Torque Control" ?

Regulation fuel that enters the cylinders to produce an appropriate amount of torque for engine speed.

7

What is "Effective Stroke" ?

The distance the plunger moves between port opening and port closure.

8

What are "Timing Pins" ?

Locks injection pump or engine in position to obtain correct pump to engine timing.

9

What is "Sleeve Metering" ?

Sliding control sleeve.
Sleeve position determines when injection period ends by spilling fuel from the plunger.

10

Reference Voltage (Vref)

Precise voltage supplied to ECM sensors.
Typically 5 volts.

11

Piezoresistive Sensors

Measures vibration and dynamic or continuous pressure changes.

12

Variable Reluctance Sensors

Measures rotational speed; wheels, Vehicle speed, engine speed, camshaft and crankshaft speed.

13

Hall Effect Sensors

Measures the rotational speed of a shaft.
Produces digital signal square waveform.
strong signal at low shaft rotational speed.

14

Control Sleeve Position Sensor

Sensor used in electronic governors.
Provides close loop feedback about control sleeve position.