Dictionary of Automotive Terms Abbreviations

DICTIONARY OF AUTOMOTIVE TERMS - "Eq"

Equalizer: A bracket or cable connector which balances tension equally on the cables to the parking brakes.

Also See
graphic equalizer
compensator

Equalizer line: In air conditioner system, a line or connection used to operate certain control valves. Little or no refrigerant flows through the line

Equal length header: An exhaust manifold where the runners from each cylinder are of equal length. Such a system allows exhaust pulses to meet at the collector or single pipe in a controlled sequence, thus enhancing cylinder evacuation and gas flow.

Equal power distribution: A system in four-wheel drive vehicles which ensures that an equal amount of power is passed to the front and rear wheels

Equal power split: A system in four-wheel drive vehicles which ensures that an equal amount of power is passed to the front and rear wheels

Equilibrium reflux boiling point: (ERBP) The boiling point of a brake fluid as determined by a special test procedure. Both dry and wet ERBP's are used in evaluating brake fluids.

Equipment: Devices and systems fitted to a vehicle which are either essential or optional, and either fitted by the manufacturer (original equipment) or subsequently by the owner (aftermarket equipment).

Also See
aftermarket equipment
integral equipment
low-bake equipment
optional equipment
original equipment
standard equipment

Equivalence ratio: (ER) The ratio of the stoichiometric oxidizer to fuel ratio (O/F) of a particular oxidizer and fuel to the actual oxidizer to fuel ratio at which the unit is operating. This is a measure of the "fuel rich" condition of a system ("ER>1" is fuel rich while "ER<1" is fuel lean). For example, in a pure oxygen and hydrogen system, the stoichiometric O/F is 8:1. Therefore, a unit operating at a ratio of 4:1 has an equivalence ratio of 2.0 (fuel rich).