Misfire
A misfire is an ignition of the air-fuel mixture in an internal combustion engine in the hot exhaust pipe instead of in the cylinder. The misfire creates a bang in the exhaust and can damage the muffler system , catalytic converter and oxygen sensor .
Misfires occur e.g. B. occurs when the spark plugs no longer ignite reliably in a gasoline engine or when fresh air reacts with still unburned fuel in a damaged exhaust system with holes.
In order to intentionally cause misfires at shows , a switch is operated to interrupt the ignition in show cars.
In motorsport , misfires are very common, as the clutch is often not used for a gear change, but ignition interrupters are used to briefly relieve the crankshaft and thus the transmission. The unburned fuel then enters the hot exhaust tract and burns explosively there, often audible with a loud bang shortly after changing gears. However, the exhaust manifolds and the entire exhaust of racing engines are designed for this enormous load.
An anti-lag system is another way to control misfire.
