An electric arc, or arc discharge, is an electrical breakdown of a gas that produces an ongoing plasma discharge, resulting from a current through normally nonconductive media such as air. An arc discharge is characterized by a lower voltage than a glow discharge, and relies on thermionic emission of electrons from the electrodes supporting the arc. An archaic term is voltaic arc, as used in the phrase "voltaic arc lamp".
A compact car (North America), or small family car in British acceptation, is a classification of cars that are larger than a subcompact car but smaller than a mid-size car, equating roughly to the C-segment in Europe.
Current compact car size, as defined by the United States Environmental Protection Agency (EPA), for the US and for international models respectively, is approximately 4,100 mm (161 in) and 4,450 mm (175 in) long for hatchbacks, or 4,400 mm (173 in) and 4,750 mm (187 in) long for convertibles, sedans (saloon) or station wagons (estate car). Multi-purpose vehicles and sport utility vehicles based on small family cars (often called compact MPVs and compact SUVs) have similar sizes, ranging from 4,200 mm (165 in) to 4,500 mm (177 in) in the U.S., and from 4,400 mm (173 in) to 4,700 mm (185 in) in international-based models.
Electrical breakdown or dielectric breakdown refers to a rapid reduction in the resistance of an electrical insulator when the voltage applied across it exceeds the breakdown voltage. This results in a portion of the insulator becoming electrically conductive. Electrical breakdown may be a momentary event (as in an electrostatic discharge), or may lead to a continuous arc discharge if protective devices fail to interrupt the current in a high power circuit.
Under sufficient electrical stress, electrical breakdown can occur within solids, liquids, gases or vacuum. However, the specific breakdown mechanisms are significantly different for each, particularly in different kinds of dielectric medium.
A spark plug (sometimes in British English a sparking plug, colloquially a plug) is a device for delivering electric current from an ignition system to the combustion chamber of a spark-ignition engine to ignite the compressed fuel/air mixture by an electric spark, while containing combustion pressure within the engine. A spark plug has a metal threaded shell, electrically isolated from a central electrode by a porcelain insulator. The central electrode, which may contain a resistor, is connected by a heavily insulated wire to the output terminal of an ignition coil or magneto. The spark plug's metal shell is screwed into the engine's cylinder head and thus electrically grounded. The central electrode protrudes through the porcelain insulator into the combustion chamber, forming one or more spark gaps between the inner end of the central electrode and usually one or more protuberances or structures attached to the inner end of the threaded shell and designated the "side", "earth", or "ground" electrode(s).
Spark plugs may also be used for other purposes; in Saab Direct Ignition when they are not firing, spark plugs are used to measure ionization in the cylinders - this ionic current measurement is used to replace the ordinary cam phase sensor, knock sensor and misfire measurement function.]citation needed[ Spark plugs may also be used in other applications such as furnaces wherein a combustible fuel/air mixture must be ignited. In this case, they are sometimes referred to as flame igniters.]citation needed[
An electric spark is a type of electrostatic discharge that occurs when an electric field creates an ionized electrically conductive channel in air producing a brief emission of light and sound. A spark is formed when the electric field strength exceeds the dielectric field strength of air. This causes an increase in the number of free electrons and ions in the air, temporarily causing the air to become an electrical conductor through dielectric breakdown.
Lightning is an example of an electric spark in nature, while electric sparks, large or small, occur in or near many man-made objects, both by design and sometimes by accident.
The Ford ZX2 or Escort ZX2 is a sports coupe derived from the third-generation Ford Escort. The Escort ZX2 was first introduced in 1998 and sold until the 2003 model year.
A sporty version of the Escort returned to the public in the Spring of 1997 as a 1998 model, a coupe called the ZX2. Ford gave the ZX2 a flashy body style and a 2.0-liter 16-valve "Zetec" engine which pumped out 130 horsepower and would move the ZX2 from 0 to 60 mph in around 7.8 seconds.
The Ford Escort was a compact car that was manufactured by the Ford Motor Company. The North American Escort adopted both the badge and the general design of a redesigned European model, and the name has been applied to several different designs in North America since its introduction as Ford's first successful world car. This platform was also known in Australia and Asia as the Ford Laser, and it was also sold as the Mazda 323, as the exterior dimensions and engine displacement were in compliance with Japanese regulations. It was sold at Mazda "Autorama" dealership sales channels.
The Escort was Ford's first front-wheel-drive car built in North America, replacing the dated Ford Pinto subcompact car (1971–80) with a modern front-wheel drive design popularized by the Volkswagen Rabbit. It also effectively replaced the smaller Ford Fiesta, which was imported from Europe from 1978–80.