Exam 16: Vehicles With Alternative Power Sourceshybrid and High-Voltage System Service

In which hybrid vehicle design is there a direct mechanical connection between the engine and the wheels?

In a hybrid system, the __________ __________ is a device that stores energy as electrostatic charge and is the primary device in the power supply during hill climbing, acceleration, and the recovery of braking energy.

____ braking means that the braking energy is turned back into electricity instead of heat.

In the dual-stator, dual-voltage system, dual voltage is produced from a single ____ that has two output voltages.

Describe the basic operating principle of a fuel cell.

The ____ controls the operation of the system main relay (SMR) to connect and disconnect the power source of the high-voltage system.

After the high-voltage service plug is removed, a minimum of ____ must pass before beginning service on the system.

The main advantage of the ISG system is:

In a PEM fuel cell, which side does the oxygen enter from?

In the ISG system the stator is attached to the engine block and coils that are formed by laser-welding copper bars.

The hybrid electric vehicle (HEV) system can use ____ to recover energy that normally would be lost to heat and use it to supplement the power of the engine.

A reformer on board a fuel cell powered vehicle is used to produce hydrogen from a fuel sources such as methanol.

What technology combines oxygen from the air with hydrogen to produce electricity?

In a hybrid vehicle the motor/generator recovers the heat energy used to brake by converting rotational energy into kinetic energy through a system of electric motors and generators.

What is one of the newest technologies to emerge from the research and development of the 42-volt system?

Lean burn technology uses high air-fuel ratios to increase ____.

What type of system uses two generators, one that operates at 42-volts while the other operates at 14-volts?

Technician A say the inverter converts the voltage from 270 VDC to 14 VDC to recharge the auxiliary battery and to power 12-volt electrical components. Technician B says the convertor converts HV battery DC voltage into three-phase alternating current  (AC) for MG1 and MG2. Who is correct?

What are some of the advantages that can be derived from a 42-volt electrical system?

The high-voltage electronic control unit (HV ECU) controls the two motor generators (MG1 and MG2) and the engine based on ____ demand.