Dictionary of Automotive Terms Abbreviations

DICTIONARY OF AUTOMOTIVE TERMS - "Dr"

Dr: Abbreviation for Door".

Draft

An unpleasant current of air intruding into the interior of a car.
The depth of the ship below the waterline measured vertically to the lowest part of the hull.
To follow behind a faster vehicle to take advantage of its air currents.

Also See
Horizontal draft carburetor

Draft gauge: Instrument used to measure air movement by measuring air pressure differences.

Draft indicator: Instrument used to indicate or measure chimney draft or combustion gas movement. Draft is measured in units of .1 in. of water column.

Drafting: The action of following closely behind a faster vehicle so as to take advantage of the aerodynamic effect which causes both the vehicles behind and the one in front to move faster.

Also See
Slip stream.

Draft marks: The numbers which are placed on each side of a ship at the bow and stern from the lower edge of the number to the bottom of the keel

Draft regulator: Device which maintains a desired draft in a combustion-heated appliance by automatically controlling the chimney draft to the desired value.

Drag

To accelerate a vehicle from a standing start, over a course one-fourth mile in length. Also called drag racing.
Used by some Drivers when referring to challenging another Driver to an Acceleration race.
Air resistance.

Also See
Aerodynamic drag
The condition of a clutch when it fails to fully disengage. The plates still rub against each other and causes intermittent contact between the engine output and the transmission gears. Called clutch drag.
The condition of brakes when the pads or shoes still rub the disc or drum. Called brake drag.

Also See
Aerodynamic drag
Clutch drag
Coefficient of drag
Idling drag
Wind drag

Drag coefficient: (Cd) A number used in calculating the Aerodynamic drag acting on a vehicle. The Drag coefficient is a function of factors like the shape of the vehicle, airflow through the vehicle for Ventilation and cooling. The number is determined in a wind-tunnel or by Coasting tests performed on the vehicle. The lower the drag coefficient the less drag on the vehicle and the more aerodynamic is the vehicle. A sleek vehicle has a drag coefficient, or Cd, of about 0.30; a square, flat plate's is 1.98. Also signified by Cx.

Drag link: A steel rod connecting the Pitman arm to one of the Steering knuckles. On some installations the drag link connects the pitman arm to a center Idler arm.

Dragon fly: Trucker slang for a truck with no power as in "Drag 'er up one side of the hill, let 'er fly down the other."

Dragon wagon: Trucker slang for Tow truck as in "Looks like that bulldog is gonna need a dragon wagon."

Drag race: A competitive match between two vehicles in which they race over a 1/4 mile course.

Dragster: A specially constructed car for drag racing, typically with a huge supercharged V-8 engine mounted well back in the chassis and extremely wide rear tires

Dragstrip: A quarter-mile stretch of track for drag racing

Drag wheel: Special Steering wheel used on some Dragsters. Often consists of a crossbar Spoke and a portion of rim on each end.

Drain

To empty a container usually from the bottom.
A tube or channel which allows water to run to another place.

Also See
Magnetic drain plug
Oil drain plug
Oil drain valve
Radiator drain cock
Radiator drain plug

Draincock: A petcock or drain tap.

Also See
Radiator drain cock

Drain hole: A hole drilled in the bottom of a box section or a door, to allow water that has accumulated to escape so as to prevent or delay rusting

Draining tray: A container used to catch oil when draining the sump, transmission, etc.

Drain plug: Usually a threaded plug at the lowest point of the sump, gearbox, cooling system, etc., which is removed in order to drain the oil or coolant, and typically has a recessed hexagon head.
Also See
Magnetic drain plug
Oil drain plug
Oil pan drain plug
Radiator drain plug
Sump drain plug

Drain plug key: A tool for removing and tightening drain plugs, e.g., on transmissions and engine sumps, either as a multi-purpose tool with a number of different drives in the form of hexagonal or square projections at either end for different drain plugs, or as a special tool for one specific size of drain plug. Also called a drain plug wrench.

Drain plug spanner: A British term for a drain plug wrench

Drain tap: A device which controls the flow of fluid (oil or coolant) out of the bottom of the cylinder block or the bottom of the radiator.

Drain plug wrench: A tool for removing and tightening drain plugs, e.g., on transmissions and engine sumps, either as a multi-purpose tool with a number of different drives in the form of hexagonal or square projections at either end for different drain plugs, or as a special tool for one specific size of drain plug. Also called a drain plug key.

Drain valve: See
Oil drain valve

Draught: British spelling for Draft"

Draught excluder: A British term for weatherstrip

Draw

To form wires by pulling the wire stock through a series of hardened dies.
The process of removing the hardness from a piece of metal.
The amount of electrical load or electrical requirement.

Drawback: See
Duty drawback

Drawbar: Two converging bars forming a V-frame or an A-frame at the front of a trailer or motorhome, which carry the coupling for attaching to the towing vehicle

Draw filing: A file is drawn across work at right angles.

Also See
Draw-filing.

Draw-filing: Filing by passing the file, at right angles, up and down the length of the work.

Draw-through: A tubocharger system in which the turbocharger sucks the air/fuel mixture through the carburetor or fuel in, i.e., the air and fuel mixing occurs upstream from the turbocharger

DRB: Acronym for demonstrated reserve base

DRB II: Acronym for Diagnostic Readout Box (Chrysler)

DRCV: Acronym for Distributor Retard Control Valve

Dream car: A one-of-a-kind futuristic, experimental automobile usually appearing at auto shows to stimulate interest in the manufacturer's products. Much design benefit spurs from dream cars and many reach the production stage.

Dress

To give (a rough surface, flanges, etc.) the right shape by grinding or a similar process.
To prepare ore for smelting by removing impurities.

Dresser: A motorcycle set up for long-distance touring

Dressing: See
Tire dressing

Dribble: Insufficiently atomized fuel issuing from the fuel injection nozzle at or immediately following the end of the main injection phase

Drier

A dehumidifier.
A drying oven.
Substance or device used to remove moisture from a refrigeration system.
A device located in the liquid line, contains desiccant to absorb moisture from the system. Usually combined with the receiver

Also See
A-drier
Accumulator-drier
Accumulator drier
Gelling drier
Infrared radiant drier
Receiver-drier
Top coat drier
Tunnel drier

Drift

A short bar or punch used with a hammer to drive a component in or out of place for removal or installation.
The action where the rear end of a car swings to the right or left. In racing, a controlled drift will help you to go around the corner. In the winter, an uncontrolled drift might cause the car to face the wrong way or put you in the ditch.
To deviate from the normal direction.

Also See
Four-wheel Drift
Tire deviation angle

Drift punch: A tapered tool which is hit with a hammer and used to remove or install pins, shafts, rivets, etc. or to align holes when inserting screws and bolts.

Drill

A tool used to bore holes.
The action of using a drill to make a hole.

Also See
Hammer drill
Hand drill
Letter drills
Number drills
Press, drill
Spot-weld drill
Twist drill

Drill bit: A piece of rod with spiral recesses cut in it and a hardened steel tip, made in different sizes for drilling different sized holes, and inserted in the chuck of a drill

Drilled: An expression used to describe a hole which has been cut into a crankshaft to allow oil to be fed to the main bearings on the connecting rod throws.

Drill press: Drill press

A nonportable machine used for drilling.

D ring: See
D-ring.

D-ring: A D-shaped ring found on many models of Bicycle shift levers, used to adjust the level of tension on the inner parts of the lever.

Drip molding: The curved metal molding around the edge of the roof that directs water away from the side windows. Also called Drip rail"

Drip moulding: British term for Drip rail"

Drip pan: Pan-shaped panel or trough used to collect condensate from evaporator.

Drip-proof enclosure: (DP) An electric motor housing with ventilation openings in the end shells and the shells placed so drops of liquid falling within an angle of 15° from vertical will not affect performance. Usually used indoors, in fairly clean, dry locations. See Enclosure

Drip rail: A gutter running along either side of the roof to take water to the front or rear of the car, and prevent it from dripping into the car when the door is opened. The British term is drip moulding

Drivable: The condition of a vehicle which may have many mechanical and appearance problems, but it has an engine which runs and wheels that turn, etc. so that it can be operated and driven.

Drivability: The general qualitative evaluation of a Powertrain's operating qualities, including Idle smoothness, cold and hot starting, throttle response, power delivery, and Tolerance for altitude changes.

Drive

To travel in a car as in the expression, "She drives to work."
To operate a vehicle as in the expression, "Martha can drive her Dad's car."
To cause a wheel, shaft, etc. to turn or rotate.
To propel a vehicle.
A journey in a car as in "The drive to Chicago was uneventful."
To go for a drive as in, "We went for a drive last Sunday."
A stretch of private road leading to a house (i.e., driveway).
A means of transmitting power or motion as in "The drive is controlled by a servo switch."
A tool which has a square end (1/4 inch, 3/8 inch, or 1/2 inch) which fits into a recess in a corresponding socket for the installation or removal of nuts and bolts.
A die position.
One of the forward gears marked on the gear selector of an automatic transmission.

Also See
All-wheel drive
All wheel drive
Automatic four-wheel drive
Axle drive
Belt drive
Bendix drive
Bendix type starter drive
Bevel gear drive
Camshaft drive sprocket
Camshaft drive
Center drive
Chain drive
Clutch starter drive
Direct drive powertrain
Direct drive
Dual drive
Eccentric drive
Ferguson four-wheel drive
Final drive gear
Final drive ratio
Final drive
Fixed drive
Flexible drive handle
Flexible drive
Four-wheel drive
Friction drive
Front-wheel drive
Front wheel drive
Full-time four-wheel drive
Hotchkiss drive
Hydrostatic drive
Inertia drive
Intermediate drive plate
Left-hand drive
Meshing drive
Metallic drive screw
Overrunning clutch starter drive
Part-time four-wheel drive
Permanent four-wheel drive
Real-time four-wheel drive
Rear-wheel drive
Rear-wheel drive transaxle
Right-hand drive
Shaft drive
Starter drive
Strap drive
Tandem drive
Test-drive
Test drive
Torque tube drive
Torsen four-wheel drive
Tri-drive
Two-wheel drive
V-belt drive

Drive axle: Drive axles are those with powered wheels

Drive belt

A flat belt which connects two or more pulleys so as to transmit motion from one pulley to the other.
The belt that transfers the rotation of the engine by way of the crankshaft pulley to drive the various devices such as the alternator for electricity, water pump for the cooling system, air conditioning compressor for air conditioning, or power steering pump for ease of steering.

Also See
Camshaft drive belt
Fan belt
Serpentine belt

Drive cable: See
Speedometer drive cable

Drive chain: An endless chain which encircles two or more sprockets so as to transmit motion from one sprocket to the other

Drive Cycle: Any journey of a vehicle in which the engine temperature is raised from cold (below 49°C) to normal operating temperature (above 71°C)

Drive end: The end of an alternator, generator, etc., where the drive pulley or gear is located.

Drive end bracket: The cover which houses the drive end of an alternator or generator

Drive fit: A condition of fit (contact) between two parts that requires pressure to force the parts together. Usually the shaft is slightly larger than the hole so that they must be pounded or forced or driven together. Also called Force fit", Press fit", or Interference fit".

Drive gear: The gear which transmits the power to a driven gear.

Also See
Final drive gear

Drive handle: A tool, typically in the form of a bar, for turning sockets to loosen and tighten nuts and bolts, with a male square drive to be inserted into the female square drive of sockets for the turning operation. They include ratchets, jointed handles, speed brace, T-handles, torque wrenches, speeeder handle, and breaker bar.

Also See
Flexible drive handle

Drive layout: The arrangement of the order of the engine, transmission, and driven axles, e.g., Front-wheel drive, rear-wheel drive, mid-engine drive, four-wheel drive, two-wheel drive

Drive line: See
Driveline

Driveline

All the individual components beyond the engine up to the wheels (e.g., clutch, drive shaft, differential, driven axles); but not the engine or transmission. Also called drivetrain or powertrain
All the components which together transmit power from the transmission to the drive axle(s). These consist of at least one driveshaft (propeller shaft) with a universal joint at each end.

Drive module: Interchangeable unit providing motive power, either in the form of an electric motor and ancillaries, or an internal combustion engine with all necessary components, for alternative use in the same vehicle according to needs and conditions

Drive motor: Electric motor providing motive power in an electric vehicle

Driven: Something made to rotate by the engine or some other source of motive power.

Also See
Two-wheel driven

Driven axle: The axle to which power is transmitted to drive the vehicle

Driven gear: An engine needs to transmit power to the wheels by the use of sprockets and chain (as in a motorcycle) or by a drive gear which meshes with a driven gear to propel the vehicle.

Driven plate: The central clutch plate carrying clutch linings and held under pressure between the flywheel and the pressure plate when the clutch pedal is released, and transmitting power to the gearbox input shaft via splines

Driven pulley: A pulley which is surrounded by a belt to receive power from the drive pulley

Driven sprocket: On a vehicle which uses a chain (like a bicycle and some motorcycles), there are two important sprockets the drive sprocket is connected to the power source (the engine or your pedals) and the driven sprocket is usually connected to your rear wheel.

Driven wheel: The wheel (or wheels) to which power is transmitted to drive the vehicle

Drive pinion: Drive pinion

The shaft that takes power from the clutch into the Gearbox.

Also See
Clutch shaft
Hypoid gear

Drive plate: A light plate bolted to the crankshaft to which the torque converter is attached in a vehicle with automatic transmission.

Also See
Center drive plate
Intermediate drive plate
Torque converter drive plate

Drive powertrain: See
Direct drive powertrain

Drive pulley

A pulley which is surrounded by a belt to transmit power to the driven pulley
The pulley attached to the nose of the engine crankshaft. It drives the compressor clutch pulley, usually with a V-type drivebelt

Driver

A collectible vehicle which is too good to treat as a Beater and not quite good enough to show. It is a presentable old car or truck that is used for everyday purposes. It is maintained as though it were a late-model vehicle. With care, it could be easily restored to show car condition.
A person who operates the controls of a vehicle to regulate its Speed and direction.
A tool used to insert something like a fastening device (e.g., Screwdriver).

Also See
Drivers
Impact driver
Nut driver
Rim drivers
Socket driver
Tubular nut driver
Valve guide driver

Driver air bag: Original type of air bag, designed to protect the driver from being hurled into the steering wheel and instrument panel

Driver and Vehicle Licensing Agency: (DVLA) A section of the British Department of Transport which is responsible for keeping records of all registered vehicles and issuing registrations and licences for vehicles as well as licences for drivers. The center is located in Swansea.

Driver and Vehicle Licensing Center: The location for the British Driver and Vehicle Licensing Agency located in Swansea.

Drive ratio: See
Final drive ratio

Driver error: A mistake made by the operator of a vehicle particularly when there is an accident. An accident may be caused by a vehicle failure (e.g., a tire blowout), unsafe road conditions (e.g., snow, ice, fallen rock or tree), the inattention of a pedestrian, or the fault of a driver (e.g., drunkenness, inattention, intentional damage, disobedience to rules of the road).

Driver evaluation: A test of a driver's ability to handle a vehicle. May be used to grant a driver's licence for a particular type of vehicle (i.e., motorcycle, passenger car, truck, bus, taxi)

Driver reaction distance: The distance travelled between the point at which the driver perceives a demand for braking and the start of brake application.

Driver reaction time: The time elapsed between the instant the driver perceives a demand for braking and the start of brake application

Drivers: Colloquial term for drive axle tires.

Also See
Rim drivers

Driver Team: A pair of drivers who alternative driving and resting.

Drive screw: See
Metallic drive screw

Driveshaft: Click image to supersize
Driveshaft

The shaft connecting the Transmission Output shaft to the Differential Pinion shaft. It transmits power from the transmission to the Differential. It is found primarily on rear-drive vehicles. There is usually a Universal joint on either end. Also called propeller shaft.

Also See
Auxilliar drive shaft
Bevel drive shaft

Drive shaft: See
Driveshaft

Driveshaft safety strap: A metal strap or straps, surrounding the Driveshaft to prevent the shaft from falling to the ground in the event of a Universal joint or shaft failure.

Drive sprocket: On a vehicle which uses a chain (like a bicycle and some motorcycles), there are two important sprockets the drive sprocket is connected to the power source (the engine or your pedals) and the driven sprocket is usually connected to your rear wheel.
Also See
Camshaft drive sprocket

Drive tool: Any accessory for use with a socket wrench, including the drive handle

Drive train

The entire moving part of the car or motorcycle: Engine, Clutch, Transmission, Driveshaft, Differential, axles, and sometimes the wheels.
The moving parts of a bicycle: Derailleurs, Chain, Freewheel, and Crankset.

Also See
Strain in the drive train

Drivetrain

The entire moving part of the car or motorcycle: Engine, Clutch, Transmission, Driveshaft, Differential, axles, and sometimes the wheels.
The moving parts of a bicycle: Derailleurs, Chain, Freewheel, and Crankset.

Also See
Strain in the drive train

Drive transaxle: See
Rear-wheel drive transaxle

Driveway: A short drive, often leading to a garage

Drive wheels: The set of wheels that actually propel the car forward and backward. Vehicles are now identified as having Front-wheel drive, Rear-wheel drive, Four-wheel drive, or All-wheel drive.

Driving

Providing motive power, making a gear, shaft, etc. rotate.
Controlling the movement and direction of a vehicle.

Also See
Al fresco driving
Defensive driving
Metro driving
Urban driving

Driving axle: The axle which is driven by the engine through the drivetrain. Used to hold, align, and drive rear wheels and support weight of vehicle on rear wheel drive cars, or half shafts on front wheel drive cars that provide torque force to front wheels. Also called the drive axle or driven axle

Driving conditions: The situation created by the amount of traffic, the weather, and state of the roads

Driving gear: The gear which is driven by the engine. Also called the driven gear

Driving habits: The personal behaviour of the driver when controlling the vehicle, including the speeds he travels, how and when he shifts gears, how he uses the brakes, when and if he uses his signal lights, how he changes lanes, how he turns corners, etc.

Driving lamp: A British term for driving light or spot light.

Also See
Auxilliar driving lamp

Driving licence: A British term for driver's licence or operator's licence. A document which allows the holder to drive a certain type or types of vehicle, and is the only document required to be carried by the driver in Britain

Driving light: An auxiliary light used at night to illuminate the side of the road and increase the viewing distance.
Also See
Auxiliary driving light

Driving mirror: A British term for either the interior rear-view mirror or the mirrors mounted on the outside of the front doors or the front fenders

Driving position: The position in which the driver grasps the steering wheel and adjusts the location of the seat in relation to the pedals.

Driving style: The manner in which the driver handles a vehicle.

Also See
Sporty driving style

Driving wheel: The wheel(s) which is driven by the engine through the drivetrain. Also called the driven wheel

DRL: Acronym for Daytime Running Lights -- A system that automatically turns on a vehicle's low beam headlights (or in some cases, a low-power high beam headlight or even bright park lights) when the parking brake is released and the ignition is on.

Drop

A sudden reduction of pressure or voltage, etc.
Also See
Voltage drop.
On a bicycle, the vertical distance from the horizontal line connecting the two wheel axles and the Bottom bracket, one way of determining the location of the Bottom bracket in relation to the rest of the Bicycle frame
Also See
Drops
The action of leaving behind. For example in a race, you drop the vehicle you pass (i.e., overtake) and he gets further behind you as you continue to speed away.
A location where your supplies have been cached. In randonneuring events of 1200 km, you can pre-arrange to have a bag of extra clothes and other supplies waiting for you at a prescribed control (i.e., checkpoint). Also called a bag drop.

Drop arm: A British term for the Pitman arm

Drop Center: The main part or center of the frame is dropped down between the front and rear wheels to lower the vehicle to create a lower center of gravity.

Drop-center axle: A beam axle in which the main central portion of the beam is lower than the wheel centers, which was the usual layout for front axles until independent front suspension became almost universal

Drop-center rim: See
Drop center rim

Drop center rim: A one-piece rim with a deep center section which is lower than the two outer edges, this allows the bead of the tire to be pushed into the low area on one side while the other side is pulled over and off the Flange. The British term is "well-base rim"

Drop center rim taper: A passenger rim where both bead seats are tapered 5° or a tubeless truck rim where both bead seats are tapered 15°.

Drop-centre rim: See
Drop center rim

Drop centre rim: See
Drop center rim

Drop forged: A part that has been formed by heating the steel blank red hot and pounding it into shape with a powerful drop hammer.

Drop forging: A piece of steel shaped between dies while hot

Drophead

A British term for a Convertible. The word "head" refers to the roof.
Having a folding top which can be raised or lowered over the passenger compartment.

Also See
Drophead coupé
Jaguar Drophead
Lagonda Drophead

Drophead coupe: (DHC) This is a two-door automobile which has the appearance of a Convertible, but the roof is fixed in place. Abbreviated dhc. In Europe, it is called a Cabriolet".

Drophead coupé: This is a two-door automobile which has the appearance of a Convertible, but the roof is fixed in place. Abbreviated dhc. In Europe, it is called a Cabriolet".

Dropout: One of two slots in the Frame into which the rear wheel axle fits.
Also See
Fork tips

Dropout hanger: A threaded metal piece that extends below the right rear Dropout of a Bicycle used as a mount for the rear Derailleur.

Dropped axle: A front axle that has been altered so as to lower the Frame of the vehicle, consists of bending the axle downward at the outer ends.

Dropped valve: A situation where the rising piston hits a valve which has become dislodged or open at the wrong time.

Drops: The lower, straight portion of a turned-down-type Handlebar set.

Droptop: A colloquial term for convertible.

Druid forks: Side-sprung girder forks on a motorcycle. Druid was the original maker

Drum

The part of a drum brake that rotates with the axle hub. The brake shoes press against the inside of the drum when the brakes are applied
A cylindrical container.
A Housing for Transmission gears where the Bands are located.
To make a whump, whump sound.

Also See
Brake drum
Brake drum lathe
Drum brake

Drum brake: Click image to supersize
Drum Brake

A type of brake using a shallow drum-shaped metal Cylinder that attaches to the inner surface of the wheel and rotates with it. When you press down on the Brake pedal, curved Brake shoes with Friction linings press against the inner circumference of the drum to slow or stop the vehicle.

Also See
Brake drum

Drum brakes: See
Drum brake.

Drum compound: See
Anti-drum compound

Drum lathe: See
Brake drum lathe

Drum web: The metal plate or structure that fills the closed edge of the drum

Dry

For paint, to lose its wetness often to the place where the surface is not even tacky.
For bearings, to lack grease or other lubricant.

Also See
Air-dry
Air dry
Hard-dry
Surface dry
Touch-dry

Dry ballast: A form of Ballasting where a fine powder of barium sulfate is inserted inside the tire. It is sometimes referred to incorrectly as Lead ballast because of one brand name, Ledballast.

Dry battery: See
Dry cell.

Dry boiling point: The temperature at which fresh Brake fluid from a new container will boil.

Also See
Wet boiling point
DOT 3.

Dry box: Trucker slang for freight trailer as in "I pulled both skateboards and dry boxes."

Dry bulb: An instrument with a sensitive element to measure ambient air temperature.

Dry bulb temperature: Air temperature as indicated by an ordinary thermometer.

Dry capacitor condenser: Electrical device made of dry metal and dry insulation; used to store electrons.

Dry cargo ship: Vessel which carries all dry cargo

Dry cell: A Battery (like a flashlight battery) that uses no liquid Electrolyte.

Dry cell battery: Electrical device used to provide DC electricity, having no liquid in the cells.

Dry charged battery: A Battery with the plates charged but lacking Electrolyte
when ready to be placed in service, the Electrolyte is added.

Dry clutch: A clutch where the plate or plates do not run in a oil bath as opposed to a "wet clutch" which does.

Dry dock: An enclosed basin used to place a ship on dry land so that all the submerged parts and fittings can be repaired.

Dryer: See
A-dryer

Dry friction: Dry friction exists when the rubbing parts have no other substance between them and are clean of other materials (i.e., no grease or oil). Opposite to Wet friction.

Dry galvanizing: A hot-dip galvanizing method in which the metal components are first immersed in a solution of flux and then dried, so that they become pre-coated with a thin film of flux, which melts in the zinc bath, to which certain metals, such as tin and aluminum, may be added to give fluidity, and in the case of tin, brightness. The opposite is Wet galvanizing

Dry gas: See
Dry natural gas

Dry hole: An exploratory or development well found to be incapable of producing either oil or gas in sufficient quantities to justify completion as an oil or gas well. Also see Well.

Dry ice: Refrigerating substance made of solid carbon dioxide which changes directly from a solid to a gas (sublimates). Its subliming temperature is - 109 0F I - 79 0C1.

Drying agent: See
Desiccant

Drying oil: Any oil that hardens in the presence of air and sunlight

Drying oven: An enclosure where painted vehicle bodies are subjected to heat in order to dry and/or bake on the paint

Drying time: The time required for a solvent to evaporate after an adhesive film has been spread over the two surfaces to be bonded

Dry joint: A faulty electrical joint which does not give proper contact

Dry liner: When a Cylinder sleeve is pressed into a bore and the cooling fluid does not contact the outside of the sleeve, the engine has a dry liner.

Also See
Liner

Dry manifold: An intake manifold with no integral coolant passages cast into it

Dry natural gas

Natural gas which remains after:

the liquefiable hydrocarbon portion has been removed from the gas stream (i.e., gas after lease, field, and/or plant separation)
any volumes of nonhydrocarbon gases have been removed where they occur in sufficient quantity to render the gas unmarketable.

Dry natural gas is also known as consumer-grade natural gas. The parameters for measurement are cubic feet at 15.5°C and 14.73 pounds per square inch absolute.

Dry setting: The adjustment of the float with a graduated rule or drill bit while the carburetor is disassembled on the bench. Usually consists of setting a prescribed clearance between the top of the float and the air horn

Dry sleeve: A Cylinder sleeve application in which the sleeve is supported in the block metal over its entire length, the Coolant does not touch the sleeve itself.

Also See
Wet sleeve

Dry spray: See
Dry-spray.

Dry-spray: A paint fault where the paint pigment is not being held properly by the binder, or where the binder evaporates before the paint reaches the surface. Atomized paint that does not dissolve into the material being sprayed. It is caused by holding the gun too far from the work, too much air pressure or a Solvent that evaporates too fast.

Dry sump: A Lubrication system in which the engine's supply of oil is not contained in the Crankcase ( Sump) but is pumped to the engine from an external container. This system allows the Crankcase to be reduced in size and the engine to be installed lower in the Chassis, and eliminates the oil starvation most conventional oiling systems suffer when subjected to the accelerative, braking, and Cornering forces generated by a racing car.

Dry sump lubrication: See
Dry sump

Dry system: Refrigeration system which has the evaporator liquid refrigerant mainly in the atomized or droplet condition.

Dry type evaporator: Evaporator in which the refrigerant is in the liquid droplet form.

Dry weight: The weight of a vehicle without any fuel, oil, or coolant.

Also See
Curb weight
Gross vehicle weight