- HID
- Acronym for High-intensity discharge
- Highball
- A term used in car sales, the practice of stating a very high trade-in price to a
customer who is known or expected to be shopping around, comparing prices. When the
customer finds that other dealers cannot match the trade-in price, he will return
to the original dealer, only to be told that the inflated figure was a mistake
(e.g., based on wrong assumptions as to the trade-in's clutch condition, etc.).
Many customers will then accept a new, lower price because they are tired of
shopping around.
Also see
- High beam
- All cars have at least two levels of lighting for night driving. The Low beam is used when there are other vehicles approaching or when you are following another vehicle. The high beam is used when driving on poorly lit roads where there is no visible traffic. The high beam light may be an integral part of the Headlight assembly or is the inboard light when there are two Lamps on each side of the vehicle. When the lamps are stacked vertically, the high beam is the upper one. When the high beam switch is activated, the low beam lights may or may not be switched off. In a system with factory installed day-time running lights, the high beam light is illuminated at a lower intensity. The British term for high beam is main beam.
- High beam indicator
- A blue light on the instrument panel which comes on when the high beams are activated. Also called beam indicator. The British term is main beam indicator.
- High box
- Status of the transmission when the two-speed transfer gearbox lever is in the high ratio position --for normal, on-road, day-to-day use.
- High-build filler
- A spray primer that leaves a relatively thick coat on the panel surface to cover up minor imperfections that would otherwise show up very prominently in the final color coat
- High carbon steel
- A very hard steel, as opposed to plain carbon steel. Hypereutectoid steels containing more than 0.8% carbon. Such steels consist of iron carbide (cementite) and pearlite when slow cooled. They are capable of being heat treated to high hardness, but tend to be brittle. Used for metal working formers and fine edge cutting tools (e.g., files)
- High center rim
- A raised center rim design, used in the Cts wheel
- High compression head
- A Cylinder head with a smaller Combustion chamber area thereby raising the Compression. The head can be Custom built or can be a stock head Milled (cut) down.
- High Crown Dolly
- A curved block of cast iron for shaping high crown radius panels with a bumping hammer. It has a rounded corner which is useful for bringing up low spots as is done with a pick hammer
- High crown panel
- A panel shape that curves rapidly in all directions, e.g., around the headlights of older cars. The opposite is Low crown panel
- High crown spoon
- A spoon with a broad working surface and a heavily rounded tip that is ideal for using as a Dolly or a lever in confined areas, such as headlight housings or rounded body sections above the waistline
- High-density polyethylene
- (HDPE) A very tough, chemically resistant thermoplastic, with a soapy touch; e.g., used for blow-molded parts such as fuel tanks or other moldings, such as bumpers
- High efficiency gas furnace
- Furnace which uses recycling of combustion gases or pulse combustion to obtain operating efficiencies from 85 to 95 percent.
- High energy coil
- A coil which generates higher ignition voltage and/or offers increased spark efficiency; ballasted
- High energy ignition system
- (HEI) An ignition system which provides more ignition power (higher voltage at higher amperage) than normal systems; a typical HEI includes an electronic control unit and magnetic pick-up in combination with mechanical ignition timing
- High energy ignition system with electronic spark timing
- (HEI-EST) A system consists of an electronic distributor, with the ignition coil mounted on the distributor cap on 6- and 8-cylinder models or externally on 4-cylinder models; the ignition timing is performed electronically by the electronic control module. (Used on several GM models since 1983.)
- Higher Heating value
- (HHV) The value of the heat of combustion of a fuel as measured by reducing all of the products of combustion back to their original temperature and condensing all water vapor formed by combustion. This value takes into account the heat of vaporization of water.
- High gear
- The top gear or the cruising gear of a Transmission. It is usually the highest number, i.e., fifth gear of a Five-speed transmission.
- High-geared
-
- A transmission (even like the chain system on a bicycle) where a large gear drives a small one. The larger the drive gear and the smaller the driven gear the higher the gear ratio. It will result in high speed, but is poor for getting started from a stop.
- A vehicle's transmission system which has a higher than usual gearing, to improve fuel economy.
- High impedance voltmeter
- A voltmeter with high opposition to the flow of electrical current. Good for reading circuits with low current flow, such as found in the CCC system
- High-intensity discharge
- (HID) A lamp that produces light by passing electricity through gas, which causes the gas to glow. Examples of HID lamps are mercury vapor lamps, metal halide lamps, and high-pressure sodium lamps. HID lamps have extremely long life and emit far more lumens per fixture than do fluorescent lights.
- High-intensity discharge lamp
- A lamp that produces light by passing electricity through gas, which causes the gas to glow. Examples of HID lamps are mercury vapor lamps, metal halide lamps, and high-pressure sodium lamps. HID lamps have extremely long life and emit far more lumens per fixture than do fluorescent lights.
- High lead screw
- A screw with a low pitch so that an engaged nut would move an appreciable distance with a partial revolution.
- High leverage diagonal cutting pliers
- Diagonal cutting pliers with special joint and handle design for extra cutting power
- High leverage end cutting pliers
- End cutting pliers with special joint and handle design for extra cutting power
- High lift rocker arms
- Custom Rocker arms designed so that a standard lift of the Push rod will depress or open the valve somewhat more than the stock Lifter.
- High load condition
- Occurs when the air conditioner system must operate continuously at maximum capacity to supply enough cold air
- High-Low Firing combustion controls
- The action of a combustion control which positions the air and fuel supply for low-fire and for high-fire in accordance with load demand.
- High-Mileage Vehicle
- A vehicle that exceeds 12,500 miles (20,000 km) per year. For example, a four-year old car has high miles if the odometer reads more than (12,500 x 4) 50,000 miles (80,000 km).
- High-mileage households
- Households with estimated aggregate annual vehicle mileage that exceeds 12,500 miles (20,000 km).
- High-mounted brake light
- Third brake light mounted in the middle of the rear window or on some cars integrated in the trailing edge of the rear deck spoiler
- High Occupancy Vehicle
- (HOV) Vehicles having more than one occupant. Examples include carpools, vanpools, buses, and mini-buses. Transportation systems may encourage HOV use by having designated HOV lanes.
- High Occupancy Vehicle Lane
- (HOV Lane) Exclusive road or traffic lane limited to buses, vanpools, carpools, emergency vehicles, and in some cases, single occupant motorcycles. HOV lanes typically have higher operating speeds and lower traffic volumes than adjacent general purpose lanes. HOV lanes have proven to be successful in major metropolitan areas across the US; however, their full effectiveness is usually not realized until about one to two years after implementation.
- High-performance header
- A special exhaust manifold, which is not made of cast iron as usual, but of specially designed, curved and welded steel tubes, to produce a smooth flow path for the exhaust gases, avoiding any sharp bends; less heavy, less sturdy and more expensive than an ordinary manifold; usually replaces the down pipe
- High Platform Bus
- Depicting heavy-duty, OTR coaches and tour buses designed for long-distance or intercity travel. Passenger platform higher than driver's seat, with large cargo holds under floor. May have a washroom. Some are two axle vehicles but most are found with three axles: One steering, one four-wheeled drive and one two-wheeled tag axle.
- High-pressure cut-out
- Electrical control switch operated by the high-side pressure which automatically opens electrical circuit if too high pressure is reached.
- High pressure foaming
- A process in which plastics are foamed under high pressure (6-50 Bar). The opposite is Low-pressure foaming
- High-pressure gauge
- Instrument for measuring pressures in range of 0 psia to 500 psia (101.3 kPa to 3600 kPa).
- High pressure line
- The line(s) carrying high pressure liquid and gas from the compressor outlet to the expansion valve inlet
- High pressure relief valve
-
- A safety valve located in the discharge line (six-cylinder compressors) or the compressor block (two-cylinder compressors)
- Located somewhere on the high side of the air conditioning system often next to the receiver drier this safety valve protects the system against excessive pressure
- High-rise manifold
- An Intake manifold designed to mount the Carburetor or carburetors, considerably higher above the engine than is done in the standard manifold. This is done to improve the angle at which the fuel is delivered.
- High side
-
- In air conditioning systems, the high side (i.e., high pressure side or discharge side) is located between the compressor and expansion valve or orifice tube and includes the condenser. The opposite is Low side
- Parts of a refrigerating system which are under condensing or high-side pressure.
- Another term for discharge side. The part of the air conditioning system under high pressure, extending from the compressor outlet to the thermostatic expansion valve/tube inlet
- High-side float
- Refrigerant control mechanism which controls the level of the liquid refrigerant in the high-pressure side of mechanism.
- High-side float flooded system
- Refrigeration system which has a float operated by the level of the high-side liquid refrigerant.
- High-side service valve
- A device, located on the discharge or high side of the compressor, at which high side pressure can be checked and other service operations can be performed
- High side service valve
- A device, located on the discharge or high side of the compressor, at which high side pressure can be checked and other service operations can be performed
- High siding
- Pitching a bike over away from the direction you are turning. The most dangerous kind of crash
- High-temperature collector
- A solar thermal collector designed to operate at a temperature of 82°C or higher.
- High-tension battery
- A UK term for a B-battery
- High-tension distributor
- A distributor, in electronically controlled ignition systems, which has no controlling functions or advance mechanism
- High tension lead
- High Voltage wire from the Ignition coil. May also indicate the Secondary wire from the Ignition coil to the Distributor and wires from the distributor to the Spark plugs.
- High-tension leads
- The wire which goes from the Ignition coil to
the Distributor and the wires which go from the
distributor to each of the Spark plugs.
Also see
- High-voltage reserve
- The difference between the available ignition voltage and the ignition voltage required at a given moment
- Highway
- Any public road outside the cities with a foundation and a hard surface. Originally, the highway was a way higher than the ground, e.g., as opposed to stage coach tracks. Since similar speed limits exist in the USA and Canada for all types of highways, both single or multilane (usually between 50 and 70 mph or 80 and 110 kph), the terms highway driving speeds and highway driving should not be associated with speeds higher than 70 mph (110 kph).
- Highway bar
- An auxiliary lateral piece of metal (usually chromed for good appearance) fitted to the front down tubes or frame. Folding Pegs may be found at each end. The bar allows the rider to position his feet straight ahead for variety in leg position when riding long distances. Also called hi-way bar.
- Highway marker shield
-
A road sign which indicates the type and road number of a highway. In some cases the direction of travel (nearly always North, South, East or West) is also indicated.
Interstate shield
- Highway peg
- A folding footrest which is mounted on the ends of a Highway bar
- Highway Tractor
- The truck portion of semi-tractor-trailer unit or train which is designed to pull a semitrailer by means of a fifth wheel mounted over the rear axle(s). Also called a Truck tractor
- Hill descent control
- (HDC) A system employed on newer 4x4 vehicles which allow them to proceed down a hill more slowly so that the wheels won't lock up.
- Hill holder
- A mechanically or electromechanically engaged device for preventing accidental rearward movement of a vehicle prior to driving away; found mainly in automatic transmissions
- Hill-holder system
- A system that locks the brakes in the applied position on uphill grades when the driver's foot is removed from the brake pedal.
- Hi-lo lever
- Term sometimes used to describe the transfer gearbox lever. High Load suspension. An option on the Defender 90 enabling payload to be raised by about 150 kg.
- Hinged-caliper disc brake
- An old disc brake design formerly used on motor cycles; superseded by sliding-caliper disc brakes
- Hinged quarter window
- A rear side window between the B-post and the C-post and/or in the case of station wagons, between the C-post and the D-post. It is provided with hinges to allow it to be opened
- Hinge facing
- A part of the door frame that includes the bracing and threaded plate for mounting the hinge to the door. It is not to be confused with the Hinge panel that is part of the hinge pillar of the body shell.
- Hinge panel
- Sheet metal panel spot-welded to the A-post or rear of the front fender that accommodates the hinges for the front door
- Hinge pillar
- The vertical structural element that carries the front door hinges; the upper end of the hinge pillar is usually the side of the windshield frame. Also called A-pillar
- Hinge plate
- The reinforcing plate between the hinge and the door panel which distributes the forces acting on the hinge bolts over a larger area of the panel
- Hinge tapping plate
- The threaded plate housed in a sheet metal cage spot-welded to the hinge pillar or, in some cases, to the door frame; the door is bolted to this plate and may be adjusted within certain limits, as the plate can be moved about in its sheet metal cage
- Hispano Suiza
- A brand of vehicle of which the H6 from 1919, all French models, and the Spanish models T56, T56BIS, T64 are classic cars.
- Hitch
-
- To connect or couple up a motorhome or trailer to a towing vehicle.
- The bracket used to connect a vehicle to a trailer or motorhome.
Also see
- Hitch class II
-
A trailer hitch rated at 3500 lb gross trailer weight and 350 lb tongue weight.
Hitch class II
- Hitch ball
-
A metal ball with a bolt attached to it. It is secured to a bracket on a vehicle in order to mount a trailer hitch. British term is towball
Hitch ball
- Hitch pin
- A heat-treated, hi-strength steel pin ranging from a diameter of 7/16" to 1-1/4"
and a length from 3-1/2" to 7". A flange is at one end and a hole (through which a
Hair pin cotter or
Hitch pin clip can be inserted)
at the other end. The hitch pin secures the hitch to the receiver.
Also see
- Hitch pin clip
-
A Hair pin cotter with one straight leg. Insert the straight leg into the hole of a rod so that the bent leg will encircle the rod.
Hitch pin clip
- Hitch rack
- A bicycle rack mounted to the hitch on the rear of a car or truck. Available in ball mount, 1.25" receiver, and 2" receiver versions.
- Hi-way bar
- An auxiliary lateral piece of metal (usually chromed for good appearance) fitted to the front down tubes or frame. Folding pegs may be found at each end. The bar allows the rider to position his feet straight ahead for variety in leg position when riding long distances. Also called highway bar.