Exam 22: Hybrid Transmissions

What is the battery pack voltage in a Honda integrated motor assist (IMA) system?

When a hybrid vehicle is being stopped, most of the kinetic energy of the vehicle's movement is converted into heat by the friction of the brake pads against the brake rotors; therefore, all of this energy is lost.

A technician should only work on a hybrid vehicle once they have completed the safety training and have a thorough knowledge of the system.

Which of the following features qualifies a vehicle as a "mild hybrid"?

Technician A says that hybrid vehicles have an internal combustion engine and an electric motor. Technician B says that most hybrid vehicles utilize regenerative braking to help improve fuel economy. Who is correct?

Technician A says torque assist refers to using torque to help propel the vehicle when additional torque is needed. Technician B says common hybrid systems in current production include belt alternator starter and integrated motor assist. Who is correct?

The hybrid system found in Toyota and Lexus vehicles uses a transaxle that contains two electric motor/generators, a final drive gear set, a differential assembly and a planetary gear set.

Two technicians are discussing Toyota and Lexus hybrids. Technician A says Toyota and Lexus hybrids use a power-splitting device that could be considered a type of CVT. Technician B says these types of hybrids use voltages from 200 to 650 volts depending on the application. Who is correct?

To maximize fuel savings and hybrid function performance, what is different between transaxles used with an Integrated Motor Assist (IMA) hybrid and those used in a conventional vehicle?

What determines if a vehicle is considered a mild hybrid or full hybrid?

Ford Motor Company uses planetary gear sets in their hybrid vehicles to create a ________ when it is requested by the driver.

Which hybrid system has two electric motors attached through a set of transfer gears?

The Ford transaxle uses two electric motor/generators that, in conjunction with an Internal Combustion Engine (ICE), split power through a planetary gear set.

At approximately what speed does a hybrid vehicle switch from electric-only propulsion to a mode that uses both electric and internal combustion engine propulsion?

All of the following statements with respect to the Honda integrated motor assist are true except:

Many full hybrid vehicles can operate at low speeds using the electric motor only. These cars typically begin using the internal combustion engine at _________.

The only major difference between the Ford and the Toyota hybrid vehicles is that rather than having the two electric motor/generators directly connected to the ring gear and the sun gear, as they are in the Toyota vehicles, the Ford hybrids are attached through a set of ________.

Tech A states that high voltage wiring will be encased in color coded conduit to identify the high voltage. Tech B states that many connectors on hybrids will have an interlock system built in that will turn off the high voltage system if the connector is unplugged. Who is correct?

Technician A says that the Honda IMA system uses a thin electric motor between the engine and the transmission. Technician B says that the Honda IMA system uses battery voltages between 144 and 158 volts. Who is correct?

Which of the following transaxles can be used in combination with the integrated motor assist system?