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Why is high voltage needed to establish a spark across the gap of a spark plug?
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What is the spark plug voltage?
Spark plug voltage is high tension voltage, needed to jump a spark between the plus and minus poles. Needed tension is about a minimum of 10.000 Volt between the poles.
How far can a spark jump?
That depends on the voltage across the gap, and the type of atmosphere it is in. Lightning, which is a type of spark, can jump thoudsands of feet.
How the fuel is ignited in a petrol engine?
Through the help of a spark plug. An high voltage electrical discharge across the the tips of a spark plug, which sits in the compression chamber, creates a spark which ignites the fuel-air mixture inside.
What is the expected firing voltage at the spark plug?
On older cars around 10,000v was needed. On modern cars it can be between 20,000 and 30,000 volts.
Is a plasma spark plug better than a pulstar spark plug?
look up spark plug wikipedia. more surface area of spark equals more gas burnt efficiently equals more power/torque more surface area of spark equals wider spark gap which requires higher voltage to make a spark across the gap
How much voltage is there in a visible spark?
30,000V for each centimeter in length. So for a spark of 2 centimeters that implies the voltage is 60,000V
How spark plugs produce high voltage?
Spark plugs don't produce high voltage they just make sparks with high voltage. The high voltage in a car is produced by running the low voltage of a car through a coil and condenser a distributor defines exactly when the spark happens to light up the fuel in the cylinder
Why is a high voltage spark needed to produce nitrogen dioxide?
Well its not needed. When air comes into contact with a plasma NO2 can form N + 02 --> NO2 under the right conditions. its a balance that is depending on temp.
What voltage spark plug sparks?
40000
How many volts are needed to cause electricity to jump 1 cm?
The dielectric field strength of air is 4 to 30 kV/cm. So a voltage of less than 4 kV is not enough to cause a spark to jump a 1 cm air gap. A voltage over 30 kV is plenty to cause a spark to jump a 1 cm air gap. Within that range, pointy conductors allow a spark to form at lower voltage than smoothly rounded conductors. Different gases and gas pressures also have an effect on the exact voltage required to produce a spark.
What is the function of a coil?
An ignition coil (also called a spark coil) is an induction coil in a automobile's ignition system which transforms a storage battery's 12 volts to the thousands of volts needed to spark the spark plugs.This specific form of the autotransformer, together with the contact breaker, converts low voltage from a battery into the high voltage required by spark plugs in an internal combustion.source is from http://www.madabout-kitcars.com/kitcar/kb.php?aid=269
What is the ignition coil for?
The coilThe igition coil provides high voltage to the spark plug, to provide the spark to ignite the fuel in the combustion process inside the engine. Likely, you know that most cars only have 12 volts that run all the functions in a car. But 12 volts is not enough to provide a spark across the electrode of a spark plug, so more voltage is needed to jump the gap of the spark plug electrode. The coil provides this by magnetic induction inside the coil. It converts 12 volts to tens of thousands of volts, which is what is needed by the spark plug. If you are shocked by a car's ignition coil output voltage, you will definitely feel it! But you will not be permentately harmed or killed, because this voltage is at a very low amperage. ===========================================================The ignition coil is basically a transformer. It converts a low voltage into a high voltage to create a spark at the spark plug.The way it works may seem backwards, but basically, a low voltage (about 12 volt) electrical current is sent through a coil of wire (the "primary" winding), which causes an electromagnetic field to build up. When this low-voltage electrical is inturrupted (by the points in a conventional distributor, or by the engine's computer), it causes this electromagnetic field to collapse suddenly. As it collapses, it cuts across the windings of a "secondary winding" which is wound around the primary winding. Since the secondary has many more turns of wire than the primary, the magnetic field causes a much higher voltage (anywhere from 5,00 to 20,000 volts) to flow in it. This is the voltage that is sent out through the ignition leads to the spark plugs.Why do they have it trigger the high voltage when the current is shut off rather than when it's turned on? Because, back when they first started making ignition systems for engines, they used mechanical "points" to switch the voltage on and off. When the points "made" to allow the current to flow, they had a tendency to bounce, causing the voltage to build up erratically. When they were opened, though, the current was shut off very rapidly, giving the sudden change in current flow necessary to create the higher voltage to be induced. Nowadays, with electronic ignition systems, it could be done either way, but they usually stick with the "old" way just because it's what they're used to.
