A battery in a traditional car cannot directly create engine spark. It’s only rated at 12 volts, after all, so it needs a little help boosting the signal to the spark plugs. To make that happen, a car ...

An ignition coil takes voltage from the battery and multiplies it to create a spark at the spark plugs, which in turn ignites the engine. Cars have been using some form of the coil ignition system for ...

Take a steel rod, wrap it into a spiral shape, throw some engineered heat-treating in the mix, and you've got yourself a coil spring. That spring can be used as part of your suspension to support the ...