Induction and Turbocharging

Question 1

The primary purpose of an induction system in a reciprocating engine is to provide a sufficient quantity of air to support normal ______.

Answer 1

COMBUSTION

Question 2

(AIR FILTERING) If dust could accumulate and clog an oil passage. What could happen?

Answer 2

• It will cause oil starvation
• dust could fuck up FUEL METERING DEVICE and disrupts it’s ability to provide fuel/air mixture. Therefore , ENGINE POWER is affected

Question 3

The purpose of a fuel delivery system is to meter the amount of fuel based on the ______ of ____ delivered to the cylinders.

Answer 3

volume of air

Question 4

Drawback for Superchargers?

Answer 4

they use a large amount of the engine’s power output for the amount of power increase that they produce.

Question 5

_______ are powered by engine exhaust. In other words, a turbocharger recovers energy from a source that would otherwise be lost.

Answer 5

turbochargers

Question 6

_______ is defined as the maximum altitude that a turbocharged engine can produce its rated horsepower
under standard atmospheric conditions.

Answer 6

Critical altitude

Question 7

What happens if a turbocharged engine exceeds critical altitude?

Answer 7

power output begins to decrease like a normally aspirated engine.

Question 8

Where is turbocharger located?

Answer 8

between the air intake and the fuel metering device

or between the compressor discharge and throttle valve

Question 9

A continuous flow of ______ ______ must be pumped through the bearing housing to cool and lubricate the bearings.

Answer 9

engine oil

Question 10

An _____ is a small heat exchanger that uses outside air to cool the hot compressed air before it enters the fuel metering device.

Answer 10

intercooler

Question 11

When a wastegate is fully _____, all of the exhaust gases bypass the turbocharger and pass out the exhaust stack.

Answer 11

open

Question 12

When a wastegate is fully ______, all of the exhaust gases are routed through the turbine before they exit through the exhaust.

Answer 12

closed

Question 13

Protection for overboost condition?

Answer 13

Pressure Relief valve

Question 14

For waste gate actuators , the wastegate is held open by _____ pressure and closed by _____ pressure that acts on a piston.

Answer 14

spring, oil

Question 15

_____ _____ ____ consist of a bellows and a variable restrictor valve. The bellows senses the absolute pressure of the air before it enters the fuel metering device. This pressure is commonly referred to as ____ _____ _____.

Answer 15

Absolute Pressure Controller(APC)

Upper deck pressure

Question 16

On Automatic control system waste-gate actuator is controlled by ______?

Answer 16

APC

Question 17

______ is similar to APC but instead of using a bellows to control the position of a restrictor valve, the position of the restrictor valve seat is controlled by a CAM that is actuated by the throttle control.

Answer 17

Variable absolute pressure controller (VAPC)

Question 18

The _______ monitors both the ambient and upper deck pressures to PREVENT the turbocharger
from boosting upper deck pressure more than 2.2 times the ambient pressure.

Answer 18

pressure-ratio controller

Question 19

____ - ____ - ____ controller prevents upper deck pressure from increasing too RAPIDLY.

Answer 19

rate-of-change controller

Question 20

The ______ ______ valve assembly functions in a manner similar to the wastegate actuator.

Answer 20

exhaust bypass

Question 21

If the density of the air is insufficient to produce full engine power, the _______ _______ adjusts the oil pressure acting on the exhaust bypass valve assembly so more exhaust is directed to the turbocharger.

Answer 21

density controller

Question 22

_________ typically occurs during part-throttle operation and is characterized by a continual drift or transient increase in manifold pressure.

Answer 22

Bootstrapping

Question 23

As turbocharger air passes through a ______ ______, it accelerates to transonic speed to produce a shock wave. The shock wave slows the remaining airflow in the venturi, thereby limiting the amount of air entering the cabin.

Answer 23

sonic venturi

Question 24

A _______ engine is a reciprocating engine in which exhaust driven turbines are coupled to the engine crankshaft.

Answer 24

turbocompound

Question 25

a _______ system enables an engine to recover energy from the velocity of the exhaust gases that would be lost if
they were ducted overboard.

Answer 25

Power Recovery Turbine (PRT)