A car spark plug firing. Spark plugs are used in petrol engines to ignite a compressed fuel/air mixture in the combustion cylinders. This provides the force required to propel the car. A supply of electricity,normally at 6 or 12 volts,is fed via a distributor to an induction coil. There the voltage is stepped up to about 18,000V,enough to create a spark in the dense gas in the cylinder. At normal engine speeds,a spark plug may fire between 300 and 3,000 times each minute | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Lovegrove, Damien |
Taille de l’image : | 3704 px × 2480 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |