- C -

Computerized Automatic Temperature Control

A microprocessor control system that monitors incoming data and adjusts the temperature and humidity of the air inside the passenger compartment.

Computerized Engine Control

A microprocessor-based, engine-management system that utilizes various sensor inputs to regulate spark timing, fuel mixture, emissions, and other functions. Most systems include on-board, self-diagnostic capability and store fault codes to help diagnosis of system problems.

Con Rod

Short for connecting rod.

Concave Fillet Weld

A fillet weld having a concave face.

Concave Side

An inward-curved depression.

Concealed Headlight

A headlight system that enhances a vehicle's style and aerodynamics by hiding the lamps behind electrically-or vacuum-controlled doors when not in use.

Concentricity

The condition in which two or more features, in any combination have a common axis.

Concept Car

A vehicle built by (or for) an automaker, usually for the purposes of gauging consumer reaction at an auto show or other event. Some concept cars are design studies to test consumer response to a new look the automaker may be considering for future vehicles. Others are engineering exercises to try out new or different mechanical components.

Concours D'elegance

French for "contest of elegance," a showing of luxury cars in a plush setting.

Condensate

Moisture that is removed from air, such as that collected on the surface of an air-conditioning-system evaporator.

Condensation

1. The moisture removed from ambient air. 2. The process of a substance changing state from a vapor (gas) to a liquid.

Condenser

(also see capacitor)1. A device made up of two metallic plates separated by a dielectric insulating material. Used to store electrical energy in the plates. 2. A liquefier; the component of a refrigeration system in which refrigerant vapor is changed to a liquid by the removal of heat. 3. An improper by often used term for a capacitor.

Condenser Comb

A comb-like device used to straighten the fins on the evaporator or condenser.

Condenser Temperature

The temperature at which compressed gas in the condenser changes to a liquid.

Condensing Pressure

1. High side or head pressure, as read from the gauge at the high-side service valve. 2. The pressure present from the discharge side of the compressor to the metering device inlet.

Conditioned Air

Air that is cool, dry, and clean.

Conductance

The ability of a material to transmit an electrical charge. In DC circuits, it is the reciprocal of the resistance.

Conduction

The transmission of heat or electricity thought, or by means of, a conductor.

Conductor

Any material that will conduct an electrical charge or any material with less than three electrons in its valance shell.

Conductor Placement

A term used for wire placement.