CamshaftCamshafts use cams in engines to open valves that let in fuel to the engine and allow exhaust gases to escape. Variable Valve Technology (VVT) allows for the timing of the cams to be altered while the engine is in operation, increasing economy and performance.
SEE ALSO: VVT Carbon dioxide (CO2)Carbon Dioxide (CO2) is the primary exhaust gas produced by burning petrol, diesel or other oils in internal combustion engines. Although naturally present in the atmosphere CO2 is a major greenhouse gas. In response to concerns over climate change and pressure from governments, car manufacturers have taken significant steps to reducing CO2 outputs of vehicles.
SEE ALSO: Bluemotion, hybrid, diesel, petrol, biofuel, biodiesel. Carbon fibreCan refer to hardened plastics containing carbon or cloth woven using carbon. Many performance cars such as the Bugatti Veyron, Koenigsegg CCX and Pagani Zonda are built with carbon fibre-reinforced plastic, which is extremely hard and lightweight.
Catalytic converterModern catalytic converters scrub carbon monoxide, NOx and hydrocarbons from engine exhausts and convert them to less polluting materials, typically carbon dioxide and water. Often work in conjunction with Diesel Particulate Filters on diesel engines.
SEE ALSO: Diesel Particulate Filter (DPF) CCCubic centilitres - the volume of an engine. For example a 1300cc engine is usually described as a 1.3-litre engine.
SEE ALSO: n/a ChassisChassis consist of suspension, exhaust system and steering box frameworks in cars.
SEE ALSO: Suspension Chicken stripsA derogatory term referring unworn patches at the sides of the tyres on the motorcycle of an inexperienced biker.
The chicken strips indicate that the owner of the bike is unwilling or incapable of safely leaning into bends, as the sides of tyres show no sign of wear.
SEE ALSO: Understeer ChippingRefers to altering a car's computer (ECU), usually to provide uprated performance. ECUs can be modified by software and can be carried out by specialist garages.
SEE ALSO: ECU, modding, tuning CNGCompressed natural gas, used as a fuel alternative to petrol or diesel. Costs less than either and is cheaper, but usage is falling in favour of hybrids and biofuels.
SEE ALSO: Biofuels, LPG, petrol, diesel, E85 Collision Avoidance by Auto SteeringAnother Volvo safety system. This one uses both a radar and camera to observe any departure from a particular lane without signalling. If the car is about to move into the wrong lane and the system detects that an oncoming vehicle is on a collision course, the car is automatically steered back to a safe position in the original lane. The system is not currently live on any models.
SEE ALSO: Collision Mitigation Avoidance System Collision-Mitigating Brake SystemSystems that detect imminent collisions and apply active and passive safety features accordingly. This usually means attempting to warn a driver before applying braking systems, tensing seatbelts. Honda have pioneered CMBSs over the last five years.
SEE ALSO: Passive safety features, seatbelts Common-rail injectionAs seen in modern diesel engines, common rail diesels employ a series of valves connected to a rail that inject fuel under high-pressure into cylinders, allowing for increased efficiency and lower emissions.
SEE ALSO: Diesel, cylinders Concept carConcept cars are built by manufacturers to trial new designs and technology prior to deciding whether to take the car into production. Concept cars that do go into production are usually scaled back from the aspirations of the concept for reasons of safety, practicality, cost and sanity.
SEE ALSO: Prototype CoupeA 2-seater or 2+2-seater performance car, coupes are generally more powerful and better-handling than other segments.
Coupe-cabrioletCar that doubles as a hard-top coupe or open-top cabriolet. Increasingly popular in the UK, recent examples include the Ford Focus CC, Vauxhall Astra TwinTop, Peugeot 307 CC, Renault Megane CC, Volkswagen Eos and Volvo C70.
SEE ALSO: Cabriolet, roadster, coupe CrossoverVehicles that blur the lines of traditional segments such as hatchback, supermini, SUV and MPV. Current examples of crossover vehicles include the Nissan QASHQAI (hatchback/SUV), Ford Fusion (supermini/MPV), Jeep Wrangler (compact SUV) and pretty much any Daihatsu car.
SEE ALSO: Supermini, SUV, MPV, hatchback Cruise controlSystem that automatically controls speed, allowing for right-foot relaxation. Generally seen on the higher trim levels of modern cars.
SEE ALSO: Trim Crumple zonePart of an exterior chassis designed to crumple and thus absorb and distribute force of impact around the car, protecting the cabin and its inhabitants.
SEE ALSO: Chassis C-segmentC-segment cars are typically hatchbacks of medium size. Typical C-segment cars include the Ford Focus, Vauxhall Astra, Renault Megane, Peugeot 308, Fiat Bravo, Citroen C4, Honda Civic, Toyota Auris and Volkswagen Golf.
The naming convention is informal and subject to interpretation as vehicle classes become less stratified by the introduction of crossover vehicles that do not readily fit a body style.
SEE ALSO: A-segment, B-segment, D-segment CVT (continuously variable transmission)Gearbox with a potentially infinite number of gearing ratios. CVTs find the optimum gearing ration for the driving conditions and shifts seamlessly. As a result performance is generally increased.
SEE ALSO: Gearbox