Deck 11: Electronically Controlled and Automated Transmissions Diagnosing Advanced Electronic Systems

Question 1

A DCT transmission is really two separate transmissions, one for the even-numbered gears and one for the odd-numbered gears.

Answer 1

True

Question 2

DCTs were first put into production by _____.

A) Volkswagen
B) Borg Warner
C) BMW
D) Porsche

Answer 2

B

Question 3

Dual-clutch transmissions can change gears faster than any other geared transmission.

Answer 3

True

Question 4

A CVT transmission is an automatic transmission which functions like a manual transmission.

Question 5

A CVT without a torque converter may use a(n) _____.

A) dual-clutch flywheel
B) start clutch
C) planetary gear
D) initial start pulley

Question 6

In a typical CVT, one pulley is the drive member and the other is the driven member.

Question 7

Sequential manual transmissions (SMTs) work like typical manual transmissions, except automatic actuators shift the gears and work the clutch.

Question 8

If a CVT is equipped with five or six predetermined pulley stops in the transmission, it is known as a(n) _____.

A) manual transmission
B) automatic transmission
C) stepless transmission
D) stepped transmission

Question 9

The size of the pulleys in a CVT is _____ controlled to select the best overall drive ratio based on throttle position, vehicle speed, and engine speed

A) manually
B) automatically
C) electronically
D) computer

Question 10

Controller area network (CAN) components are used in _____ to interconnect the network of electronic control modules.

A) Toyota and Lexus hybrids
B) Ford hybrids
C) BMW hybrids
D) Honda hybrids

Question 11

The _____ hybrid system, found in GM, BMW, and DaimlerChrysler vehicles, relies in advanced hybrid, transmission, and electronic technologies to improve fuel economy and overall vehicle performance.

A) two-mode
B) four-mode
C) SMG
D) MGR

Question 12

All dual-clutch transmissions use wet clutches to prevent overheating and damage.

Question 13

Technician A says both MG1 and MG2 are used to power the drive wheels in a Toyota hybrid drive system. Technician B says only MG1 is used to drive the wheels. Who is correct?

A) A only
B) B only
C) both A and B
D) neither A nor B

Question 14

A(n) _____ is a fully automated, manual transmission with two computer-controlled clutches.

A) SMT
B) DCT
C) CVT
D) SST

Question 15

In Toyota and Lexus hybrids, MG1 is used as a starter activator and a generator.

Question 16

The most complex transmissions are those used in most high-performance vehicles.

Question 17

Two-mode hybrid vehicles can rely on electric motor power, engine power, or both.

Question 18

Currently, Audi has more models available with DCTs than any other manufacturer.

Question 19

Motor generator 1 (MG1) and Motor generator 2 (MG2) are components found in _____.

A) Toyota and Lexus hybrids
B) Ford hybrids
C) BMW hybrids
D) Honda hybrids

Question 20

Dual-clutch transmissions are being discussed: Technician A says these transmissions use a modified torque converter to transfer power from the engine to the transmission. Technician B says dual-clutch transmissions can use either wet or dry clutches. Who is correct?

A) A only
B) B only
C) both A and B
D) neither A nor B

Question 21

What was the original name of the dual-clutch transmission and where was it found?

Question 22

What do the terms "stepless" or "nonstepped" mean when referring to transmission?

Question 23

Explain how a SMT is different from a traditional manual transmission.

Question 24

Dual-clutch transmissions use what types of clutch assemblies?

Question 25

The start clutch in a CVT replaces what component?

Question 26

What is the controlling unit in the power-split device?

Question 27

What are the components of the electronic control system for a typical CVT?

Question 28

What does the acronym CAN stand for?

Question 29

What additional component found in the rear axle of Toyota and Lexus 4WD hybrids rotates the rear drive wheels?

Question 30

What unit contains a constant-mesh, six-speed manual transaxle with wet clutches?

A) Porsche Dual Klutch
B) Audi DSG
C) Volkswagen DSG
D) Mitsubishi SST

Question 31

The normal, sport, and super sport shifting modes are found in the _____.

A) Porsche Dual Klutch
B) Audi DSG
C) BMW M-DCT
D) Mitsubishi SST

Question 32

Explain the benefits and operation of a dual-clutch transmission.

Question 33

What components make up the Toyota/Lexus power-split device?

Question 34

Explain how a typical CVT operates.

Question 35

What are the benefits of continuously variable transmissions (CVTs)?

Question 36

Which of the following clutches serves to reduce friction, limits the production of heat, improves overall performance, increases the life of the clutch assembly, and is capable of handling large amounts of torque?

A) dry clutch
B) wet clutch
C) dual-clutch
D) sequential clutch

Question 37

The _____ contains a seven-speed computer-controlled unit called Drivelogic which carries out all shifts with no interruption of power flow.

A) Porsche Dual Klutch
B) Audi DSG
C) BMW M-DCT
D) Ferrari F1

Question 38

The control unit of a(n) _____ relies on inputs available on the CAN bus, plus four distance sensors, two pressure sensors, and two engine-speed sensors to choose the correct gear and shift timing.

A) Porsche Dual Klutch
B) Audi DSG
C) BMW M-DCT
D) Ford Escape

Question 39

What does the acronym IMA stands for?

Question 40

Describe the different CVT designs that have been used over the years. Give examples of each.