Electric and Hybrid Vehicles Final Exam UPDATED ACTUAL Questions And
Correct Answers
C
Terms in this set (66)
List the 4 mechanical components that make up a 1. ring gear
planetary gear speed-coupling device 2. sun gear
3. planetary gears
4, yoke
When ___ element(s) among the sun gear, ring gear, and - one
yoke is locked to the _____, that is, ___ degree(s) of - vehicle frame
freedom is constrained, the unit becomes a ______ - one
transmission - single gear
List the 3 sub modes of operation for speed-coupling 1. engine alone traction
mode of a series-parallel drivetrain 2. motor/generator alone traction
3. engine and motor/generator with speed-coupling traction
List the 6 sub modes of operation for torque-coupling 1. engine alone plus traction motor motoring
mode of a series-parallel drivetrain 2. engine alone plus traction motor generating
3. motor/generator alone plus traction motor motoring
4. motor/generator alone plus traction motor generating
5. speed-coupling traction plus traction motor motoring
6. speed-coupling traction plus traction motor generating
Describe regenerative braking in terms of which - the traction motor, motor/generator, or both produce the braking torque
components produce braking torque, where the energy - the recaptured energy is used to charge the PPS
is captured, and which components are not operating - the engine is shut down while the clutch is open
When evaluating the engine speed control approach, engine speed increases
with a fixed m/g torque, increasing the engine throttle
opening will cause what to occur
, When evaluating the engine speed control approach, engine speed increases
with a fixed engine throttle, decreasing the m/g torque
will cause what to occur
By controlling the clutch, locks, engine, m/g, and the 1. speed-coupling mode
traction motor, which operation modes are available 2. torque-coupling mode
3. regenerative braking
When evaluating the traction torque control approach, sum of torque transmitted from the ring gear of the planetary gear (Tring), and the
total traction requested to the driven wheels by the torque from the traction motor (Ttm)
driver through the accelerator pedal can be met by the
summation of which torque outputs
What are 2 control objectives for drivetrain control 1. always meet driver's torque demands (traction and braking)
strategies? 2. always maintain SOC of PPS at reasonable level (~70%, never <30%)
For a PHEV, the average net energy consumption of the zero, energy level in PPS at the beginning and end of the driving cycle are equal
PPS in a complete driving cycle is what
For a PHEV, the energy storage in the PPS is considered 0.05 hours to 0.1 hour
sufficient if it can sustain operation for what range of time
Which components are the most promising candidates as ultracapacitors, high-power batteries, or the combination of both
the PPS for PHEV's
What 3 things make PPS sustained hybrid drivetrains - drivetrain control strategy
unique from other powertrains - energy storage design
- slightly different electric motor power design
The major feature of PHEVs is what charging energy in the energy storage device from the utility grid, opposed to
through petroleum, displacing part of the petroleum fuel consumption
The amount of petroleum fuel displaced by the utility - amount of electrical energy per recharge
electricity depends on what 3 things - total driving distance between recharges
- electrical power usage profiles
List 3 driving cycles used to represent driving in the USA - FTP 72: urban route, starts with engine cold start
- FTP 75: like FTP 72 but executed with a hot engine
- LA-92: represents urban driving cycle with average speed higher than FTP 72
- NYCC: represents urban route through New York
- US06: aggressive driving cycle that describes driving pattern under high engine
loads
Describe the Charge-Depleting (CD) mode of PHEVs an operating mode in which the SOC of PPS may fluctuate, but decreases on
average while driving
Describe the Charge-Sustaining (CS) mode of PHEVs an operating mode in which the SOC of PPS may fluctuate, but is maintained at a
certain level on average while driving
Describe All Electric Range (AER) of PHEVs after full recharge, the total kilometers driven electrically (engine off) before the
engine turns on for the first time
Correct Answers
C
Terms in this set (66)
List the 4 mechanical components that make up a 1. ring gear
planetary gear speed-coupling device 2. sun gear
3. planetary gears
4, yoke
When ___ element(s) among the sun gear, ring gear, and - one
yoke is locked to the _____, that is, ___ degree(s) of - vehicle frame
freedom is constrained, the unit becomes a ______ - one
transmission - single gear
List the 3 sub modes of operation for speed-coupling 1. engine alone traction
mode of a series-parallel drivetrain 2. motor/generator alone traction
3. engine and motor/generator with speed-coupling traction
List the 6 sub modes of operation for torque-coupling 1. engine alone plus traction motor motoring
mode of a series-parallel drivetrain 2. engine alone plus traction motor generating
3. motor/generator alone plus traction motor motoring
4. motor/generator alone plus traction motor generating
5. speed-coupling traction plus traction motor motoring
6. speed-coupling traction plus traction motor generating
Describe regenerative braking in terms of which - the traction motor, motor/generator, or both produce the braking torque
components produce braking torque, where the energy - the recaptured energy is used to charge the PPS
is captured, and which components are not operating - the engine is shut down while the clutch is open
When evaluating the engine speed control approach, engine speed increases
with a fixed m/g torque, increasing the engine throttle
opening will cause what to occur
, When evaluating the engine speed control approach, engine speed increases
with a fixed engine throttle, decreasing the m/g torque
will cause what to occur
By controlling the clutch, locks, engine, m/g, and the 1. speed-coupling mode
traction motor, which operation modes are available 2. torque-coupling mode
3. regenerative braking
When evaluating the traction torque control approach, sum of torque transmitted from the ring gear of the planetary gear (Tring), and the
total traction requested to the driven wheels by the torque from the traction motor (Ttm)
driver through the accelerator pedal can be met by the
summation of which torque outputs
What are 2 control objectives for drivetrain control 1. always meet driver's torque demands (traction and braking)
strategies? 2. always maintain SOC of PPS at reasonable level (~70%, never <30%)
For a PHEV, the average net energy consumption of the zero, energy level in PPS at the beginning and end of the driving cycle are equal
PPS in a complete driving cycle is what
For a PHEV, the energy storage in the PPS is considered 0.05 hours to 0.1 hour
sufficient if it can sustain operation for what range of time
Which components are the most promising candidates as ultracapacitors, high-power batteries, or the combination of both
the PPS for PHEV's
What 3 things make PPS sustained hybrid drivetrains - drivetrain control strategy
unique from other powertrains - energy storage design
- slightly different electric motor power design
The major feature of PHEVs is what charging energy in the energy storage device from the utility grid, opposed to
through petroleum, displacing part of the petroleum fuel consumption
The amount of petroleum fuel displaced by the utility - amount of electrical energy per recharge
electricity depends on what 3 things - total driving distance between recharges
- electrical power usage profiles
List 3 driving cycles used to represent driving in the USA - FTP 72: urban route, starts with engine cold start
- FTP 75: like FTP 72 but executed with a hot engine
- LA-92: represents urban driving cycle with average speed higher than FTP 72
- NYCC: represents urban route through New York
- US06: aggressive driving cycle that describes driving pattern under high engine
loads
Describe the Charge-Depleting (CD) mode of PHEVs an operating mode in which the SOC of PPS may fluctuate, but decreases on
average while driving
Describe the Charge-Sustaining (CS) mode of PHEVs an operating mode in which the SOC of PPS may fluctuate, but is maintained at a
certain level on average while driving
Describe All Electric Range (AER) of PHEVs after full recharge, the total kilometers driven electrically (engine off) before the
engine turns on for the first time
