401dB Transmission Fundamentals - Part B Flashcards Preview

HET4 190401 Clutch/ Driveline/ Transmission > 401dB Transmission Fundamentals - Part B > Flashcards

Flashcards in 401dB Transmission Fundamentals - Part B Deck (25):
1

In most twin countershaft transmissions, which of the following does the auxiliary section not provide?
a) reverse gearing
b) range gearing
c) splitter gearing
d) deep reduction gearing

a) reverse gearing

2

The auxiliary drive gear receives torque from the auxiliary countershafts.
T/F

false; The auxiliary drive gear receives torque from the mainshaft.

3

The auxiliary section uses the synchronizer to aid in the:

b) range shift.

4

The purpose of the range, splitter and deep reduction cylinders is to:
a) transmit the gearshift lever actions to shift the auxiliary section sliding clutches.
b) use the air signal to shift the main section sliding clutches.
c) use the air signal to shift the auxiliary section sliding gears.
d) use the air signal to shift the auxiliary section sliding clutches.

d) use the air signal to shift the auxiliary section sliding clutches.

5

The output shaft:
a) delivers torque to the driveline.
b) is supported on tapered roller bearings.
c) is splined to the synchronizer sliding clutch.
d) all of the above.

d) all of the above.

6

The two-speed auxiliary section provides:
a) reduction and direct.
b) reduction and overdrive.
c) direct and overdrive.
d) direct and neutral.

a) reduction and direct.

7

The three-speed auxiliary section provides:
a) 15 usable gears.
b) 18 usable gears.
c) 13 usable gears.
d) 12 usable gears.

d) 12 usable gears.

8

Which position provides direct drive in the four-speed auxiliary section?
a) low range, low splitter
b) low range, high splitter
c) high range, low splitter
d) high range, high splitter

d) high range, high splitter

9

Identify the two (2) methods of lubrication used on multiple countershaft transmissions.

a) splash
b) pressure

10

When a spin-on type of oil filter is used on a transmission lubrication system, the filter is located between the oil cooler and the:

b) pump outlet port.

11

Transmissions that utilize splash lubrication generally filter their oil by means of:

magnetic drain plugs or magnets located in the bottom of the case.

12

How should you check the oil level of the transmission?

Always check the transmission lubricant level with the vehicle on a level surface, front-to-rear and side-to-side. Clean the area around the filler plug and ensure that the oil is level with the lower edge of the filler plug opening.

13

Which of the following best defines a hybrid drive vehicle?
a) any vehicle that has two or more drive axles
b) any vehicle that has two or more methods of propulsion
c) any vehicle that has two or more electrical systems
d) any vehicle that is propelled using hydraulics

b) any vehicle that has two or more methods of propulsion

14

Explain the difference between a series hybrid and a parallel hybrid.

In a series hybrid the engine never directly propels the vehicle. In a parallel hybrid an electric motor or hydraulic motor is sandwiched between the engine and the transmission assists with the propulsion of the vehicle.

15

Identify the three (3) key components of a diesel parallel electric hybrid.

- motor/generator
- inverter
- power electronics carrier (PEC)

16

What are the two (2) primary functions of the motor generator?

- to propel the vehicle
- to charge the battery pack

17

Why are lithium ion batteries desirable for electric hybrid applications?

low discharge rates and high storage capacity

18

During diesel electric propel mode, what effect does the electric assist that the motor provides have on the diesel engine?
a) lowers engine duty cycle
b) increases engine duty cycle
c) increases the engine's fuel consumption
d) lowers the engine RPM

lowers engine duty cycle

19

What effect does coasting or braking have on the lithium ion batteries?

the batteries are charged

20

In a diesel hydraulic hybrid assembly which component receives energy from the engine or the rear axle?

transfer case

21

Explain the two (2) functions of the hydraulic pump/motor.

The hydraulic pump/motor has two functions.
- During coast or regenerative braking it provides the oil flow into the accumulator to pressurize the system.
- During propel mode the flow of oil is reversed and the pump acts as a hydraulic motor to apply torque to the drive line.

22

Explain the function of the accumulator in a diesel hydraulic hybrid vehicle.

The function of the accumulator is to store energy for the hydraulic launch system.

23

During propulsion, explain the function of the accumulator, hydraulic motor and transfer case.

Oil flows from the high pressure accumulator to the pump/motor. The oil causes the pump/motor to operate as a motor. The motor transfers the fluid energy to the transfer case, which converts the fluid energy into mechanical energy. The transfer case applies torque to the drive line to assist with the propulsion of the vehicle.

24

In a diesel electric hybrid, what color are the high voltage cables?

orange

25

In a diesel hydraulic hybrid, what is the minimum amount of time to wait for the accumulator to drain after shut down?

5 minutes