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Discharge

1. Releasing some, or all, refrigerant from a system by opening a valve to permit the refrigerant to escape slowly into a recovery system. 2. To purge air from a sealed system.

Discharge Air

Conditioned air as it passes through the outlets and enters the passenger compartment.

Discharge Line

The fluid line that connects the compressor outlet to the condenser inlet.

Discharge Pressure

The high-side pressure of the refrigerant as it is being discharged from the compressor. Also known as high-side pressure.

Discharge Pressure Switch

A term used for compressor-discharge pressure switch.

Discharge Side

That portion of the refrigeration system under high pressure, extending from the compressor outlet to the metering-device inlet.

Discharge Valve

A term used for high-side service valve.

Disconnect

A switching device for disconnecting an electrical circuit or load from the power supply.

Discrete Components

An electrical component, such as a capacitor, that has been fabricated prior to its installation.

Discrete Device

An individual electrical component, such as a resistor.

Discriminating Sensors

Parts of the air bag circuitry that calibrate to close with speed changes that are great enough to warrant air bag deployment.

Disengage

To disconnect; used to describe the action when a clutch un-couples the power of the driving part from the driven part.

Dished Piston

A piston having a depression in the crown.

Disk

1. A magnetic device for storing information and programs accessible by a computer. 2. The rotor, a revolving piece of metal, against which shoes are applied to provide a braking action. 3. A two-dimensional figure defined by all points enclosed by a circle's diameter. 4 Often referred to as disc.

Disk Drive

A device that stores, reads, or retrieves data from a magnetic disk and copies it into the computer's memory for use.

Disk Runout

The amount that a brake disk wobbles during rotation.

Disk-operating System

An operating system in which the programs are stored on magnetic disks that keep track of, save, and retrieve files; allocate storage space and manage other control functions.

Disperesant

A chemical added to oil that prevents impurities from clinging together and forming lumps that could clog the lubrication system galleys.

Displacement

The volume within an engine's cylinders, usually expressed in cubic centimeters (cc).

Displacement

A measurement of engine size. It is literally the volume swept out by the piston in its travel from top dead center to bottom dead center, multiplied by the number of cylinders (e.g., eight for a V8 or six for a V6). It is often expressed in cubic inches or liters.