Unit 2 chapter 26-31

List the four parts of a starter armature.

1. Armature shaft 2. Armature core 3. Commutator 4. Armature windings

What is the typical range of output voltage for HV batteries?

100-300 volts

The voltmeter reading for a 12-volt battery under a light current load should be ___ volts.

12.5

HV battery voltage can range from about ____ to ____ volts dc?

150, 400

HV battery service life averages about _____ miles.

150,000

How many power sources does a hybrid vehicle use for propulsion?

2

When fast charging a 12-volt battery, you should never exceed a charge rate of _____.

35 amps

To prevent electric shock, wait at least ___ minutes after removing the high voltage disconnect before working on the HV circuits.

5

Most hybrids only charge their battery packs to ____ of maximum charge

80%

List the six major assemblies found in a hybrid drive system.

A high voltage battery, a motor-generator, a high voltage power control module, a hybrid control module, high voltage power cables, ice engine

Identify three problems that can be caused by a bad HV power cable connection.

Affect electric drive train performance, cable overheating, reduced current flow, lowered motor generator torque, and overall reduced electrical efficiency.

List the six modes of hybrid drive system operation.

All electric drive mode, motor assist mode, idle stop mode, regen brake mode, engine start mode, high voltage battery recharge mode

An ___ is an electrochemical device for producing and storing electricity.

Automotive battery.

Two causes of a humming sound after momentary engine cranking

Bad overrunning clutch or worn pinion gear unit.

Which of the following will neutralize and remove an acid diet mixture from a 12 volt battery case

Baking soda and water

A ___ test is one of the best methods of checking the condition of a 12 volt battery.

Battery load

What commonly causes a metallic grinding noise during startup?

Broken flywheel teeth or worn pinion gear teeth

What are the most common causes of a no-crank condition?

Dead battery, poor electrical connection, faulty system component

___ prevents electrical corrosion and the resulting bad connections that can burn up cables and components

Dielectric grease

Define the terms "discharging" and charging as related to battery ops.

Discharge= chemical into electrical energy; charging= electrical converted to chemical energy

Two causes of a buzzing or clicking sound from the starter solenoid.

Discharged battery or poor battery connection

When removing a starter motor, what is the first step?

Disconnect the battery.

Explain the difference between a full hybrid and a mild hybrid.

Full hybrid uses a motor generator to initially accelerate and propel the vehicle, mild hybrid shuts down is ice engine when brake pedal is pressed and doesn't have an electric motor.

a hybrid ____ monitors the system for high voltage leaking into the metal chassis of the vehicle

Ground fault interrupter

A set of electronic/electric circuits that feeds voltage (alternating current and direct current) between the high voltage (HV) battery and the motor-generator is the

HV PCM

List two symptoms of a bad starter solenoid.

No crank, slow crank, starting motor may be prevented from disengaging w the engine

Gloves to wear when working on HV components:

OSHA approved "lineman gloves"

A ____ is a planetary headset used to transfer power thru the hybrid driveline.

Power splitter

How is the power of large battery packs rated?

Watt-hour

A ___ test will determine whether current is discharging across the top of a 12 volt battery case.

battery leakage

The ___ allows the pinion gear to turn the flywheel ring gear for starting

overrunning clutch

A starter-actuated solenoid has a(n) _____ that moves a shift lever to engage the pinion gear.

plunger

The ___ keeps the engine from cranking unless the shift selector is in neutral or park.

Neutral safety switch

___ gas can collect around the top of the batteries. If this gas is exposed to a flame or spark it can explode.

Hydrogen

What is the purpose of the starting motor?

It converts electrical energy from the battery into mechanical energy to crank the engine

What is the function of a starter pinion gear?

It is a small gear mounted on the armature shaft that engages a large gear on the engine flywheel. It moves into and meshes w the flywheel ring gear any time the starter is energized.

Why is a starter current draw test used?

It measures the current used by the starting system, quickly tell you about the condition of the starting motor

How do you adjust a neutral safety switch?

Loosen fasteners, place into park, try to start engine, slide neutral switch on its mount until engine cranks.

How do you test the battery cables

Measure voltage drop across the battery post and the cable end connector while cranking engine. If more than 0.3 volts drop tighten and clean connections

List the five major components of a hybrid starting system.

Motor generator, HV power cables, hybrid control module, HV pcm, ECM

In a ____ hybrid the ice has no mechanical connection to the drive train.

Series

What is the purpose of a battery eye?

Shows the general charge condition of a 12-volt battery

A 12-volt battery has ____ cells that produce an open circuit voltage of ___ volts.

Six, 12.6

The ___ is a high current relay that completes the circuit between the battery and the starting motor.

Starter solenoid

What is the drawback to a parallel hybrid?

The motor-generator cannot drive the vehicle and recharge the battery pack at the same time. This limits the amount of time the vehicle can be driven by the motor-generator.

Starters are grouped by ____.

The type of pinion gear engagement.

How many HV power cables connect the HV power control module to the motor-generator?

Three

Why is a reduction starter sometimes used?

To further increase the rotating force applied to the engine flywheel

A bad starter relay will keep power from the starter solenoid. A faulty neutral safety switch can prevent current from flowing from the ignition switch to the starter solenoid.

True

After removing high voltage disconnect, remove the high voltage fuse and keep it in your pocket

True

HV power control module converts DC into three phase ac to operate the motor generator for engine startup.

True

Starter rebuild generally involves replacing brushes bushings and other damaged parts as well as the commutator being polished and turned.

True