Glossary

of

Terms

and

Acronyms

Used

in

the

Design

and

Testing

of

Internal

Combustion

Engines

AAFI\p=m-\Air-assisted

fuel

injection.

ABI\p=m-\Advanced

break-in.

Absorbed

horsepower\p=m-\Total

horsepower

absorbed

by

the

absorption

unit

of

the

dynamometer

and

the

friction

components

of

the

dynamometer.

Accelerated

life

test\p=m-\Any

set

of

test

conditions

designed

to

reproduce

in

a

short

time

the

effects

encountered

in

the

field.

Actual

horsepower\p=m-\The

actual

horsepower

is

the

load

horsepower

that

includes

the

friction

in

the

dynamometer

bearings

and

inertia

simulation

mechanism.

"A"

curve\p=m-\Maximum

performance

test.

Additive

removal

test\p=m-\A

test

conducted

by

recirculating

a

specific

additive

type

of

oil

through

a

test

element

for

a

specific

period

of

time.

Aeration\p=m-\The

entrapment

of

gas

in

the

coolant

or

oil.

After-boil\p=m-\Boiling

of

the

coolant

after

engine

shutdown,

caused

by

residual

heat.

Air

cleaner

element\p=m-\All

airflow

measurements

are

corrected

to

25\s=deg\C

at

100

kPa

standard

test

condition.

Air

density\p=m-\1.2250

kg/m

.

Air

viscosity\p=m-\1.7894

x

105Ns/m2.

Ambient\p=m-\Used

to

denote

surroundings,

such

as

ambient

temperature.

AQL\p=m-\Acceptable

quality

level.

ATB\p=m-\Air-to-boil

temperature;

the

ambient

temperature

at

which

the

coolant

at

the

radiator

reaches

its

boiling

point.

Auto\p=m-\Automatic.

Available

secondary

spark

voltage\p=m-\The

minimum

voltage

at

the

spark

terminal

with

the

terminal

open

circuited

and

insulated

from

ground.