What is the function of spark plug in petrol engine?
Your spark plugs are what supply the spark that ignites the air/fuel mixture, creating the explosion which makes your engine produce power. These small but simple plugs create an arc of electricity across two leads which are not touching, but close enough together that electricity can jump the gap between them.
How does a 4-stroke engine get spark?
In a four-stroke spark ignition (SI) engine the burning of the fuel occurs by the spark generated from the spark plug. … As the piston moves down the suction pressure is created inside the cylinder, drawing an air-fuel mixture into the cylinder.
What should a 4-stroke spark plug look like?
A normal plug appearance in 2-stroke or 4-stroke engines is light tan to gray, and the electrodes will not be burned. If a spark plug from a 4-stroke engine is covered with a dry, black carbon coating, it may be cold fouled.
What is the proper spark plug gap?
For most racing applications, you usually want the plug gap to be between 0.020 and 0.040 of an inch. Most engine builders seem to settle around 0.035 of an inch. Factors such as the type of ignition you run, cylinder heads, fuel and even timing can affect how much gap will work best for you.
Does changing spark plugs make a difference?
Once your vehicle receives new spark plugs, you’ll notice how much better your car feels while driving. … Increased Fuel Economy – Misfiring spark plugs can reduce fuel efficiency by as much as 30%. New plugs that are replaced at regular intervals maximize fuel economy, saving you money.
What are the advantages and disadvantages of a 4 stroke engine?
More fuel efficiency :- 4 stroke engines have greater fuel efficiency than 2 stroke ones because fuel is consumed once every 4 strokes. Less pollution :- As power is generated once every 4 strokes & also as no oil or lubricant is added to the fuel; 4 stroke engine produces less pollution.
What are the 4 steps of a 4 stroke engine?
An internal-combustion engine goes through four strokes: intake, compression, combustion (power), and exhaust. As the piston moves during each stroke, it turns the crankshaft.