438 Auto Electricity and Electronics
8. The maximum DC voltage available from the HV
battery pack is called the hybrid _____ _____ voltage.
9. The HV battery pack sends high-voltage DC into
the _____ _____ _____ for inversion into AC or
conversion to a higher or lower voltage.
10. List four functions of a hybrid motor-generator.
11. How many hybrid power cables connect the power
control module to the motor generator?
12. List three methods used to cool hybrid drive components.
ASE Certifi cation-Type Questions
1. Manufacturers are experimenting with each of the
following hybrid types, except:
(A) pneumatic hybrids.
(B) hydraulic hybrids.
(C) fuel-cell hybrids.
(D) steam-powered hybrids.
2. While discussing hybrid vehicles, Technician A says
that the internal combustion engine is not a component
of the hybrid drive system. Technician B says that the
internal combustion engine and the motor-generator
work together to provide a dependable and
fuel-effi cient means of transportation. Who is right?
(A) A only.
(B) B only.
(C) Both A and B.
(D) Neither A nor B.
3. Technician A says all assist hybrids use a small motor-
generator to aid the gas engine during acceleration.
Technician B says a full hybrid uses all electric energy to
initially accelerate and propel the vehicle. Who is right?
(A) A only.
(B) B only.
(C) Both A and B.
(D) Neither A nor B.
4. In the all-electric drive mode, the energy needed to
power the motor-generator is provided by the _____.
(A) internal combustion engine
(B) power splitter
(C) battery pack
(D) hybrid drive ECU
5. Hybrid system voltages are being discussed. Technician A
says that most hybrids have both a high-voltage system and
a low-voltage system. Technician B says that all low-voltage
systems contain a 24-volt battery. Who is right?
(A) A only.
(B) B only.
(C) Both A and B.
(D) Neither A nor B.
6. Technician A says that in motor assist mode, the
motor-generator and the internal combustion engine
apply torque to the drive train for propulsion.
Technician B says that some hybrid systems start
out only using the motor-generator during rapid
acceleration and motor assist at cruising speeds. Who
is right?
(A) A only.
(B) B only.
(C) Both A and B.
(D) Neither A nor B.
7. When discussing regenerative breaking mode,
Technician A says the motor-generator places a drag
on the rotating tires, wheels, and drive train to slow
the vehicle. Technician B says that with moderate
break pedal pressure, conventional hydraulic brakes
apply the friction pads into the spinning brake
armatures. Who is right?
(A) A only.
(B) B only.
(C) Both A and B.
(D) Neither A nor B.
8. Technician A says that in hybrid engine starting mode,
the motor-generator spins the engine crankshaft to start
the internal combustion engine. Technician B says the
hybrid ECU signals the engine ECU to provide “spark
and fuel” to the engine. Who is right?
(A) A only.
(B) B only.
(C) Both A and B.
(D) Neither A nor B.
9. Technician A says that a hybrid vehicle will switch to
battery pack charging mode when the HV battery pack
is 30% discharged. Technician B says that a hybrid
vehicle will switch to battery pack charging mode when
the HV battery pack is 70% charged. Who is right?
(A) A only.
(B) B only.
(C) Both A and B.
(D) Neither A nor B.
10. Technician A says that the inverter in the hybrid
power control module steps AC or DC voltage up or
down. Technician B says the power converter in the
hybrid power control module converts DC to AC and
AC to DC voltage. Who is right?
(A) A only.
(B) B only.
(C) Both A and B.
(D) Neither A nor B.