Which outcome occurs when combustion timing drifts in a lean-burn gasoline engine?

💡 Explanation

Unstable combustion causes fluctuating exhaust temperature because deviations in ignition timing induce cycle-to-cycle variations in peak temperatures via adiabatic expansion/compression of the gas, therefore exhaust gases vary rather than showing consistently hot/cold patterns associated with efficient or in-efficient burn profile.

• Which risk increases in high-power laser cutting applications due to beam instability?
• Which phenomenon occurs when a laser beam reflects?
• Which risk increases when a voltage induces electron transition to higher orbitals in a transistor?
• Which mechanism limits the maximum achievable cooling temperature in thermoelectric molecular coolers?
• Which outcome occurs when a jet engine exhaust induces instabilities?
• Which outcome occurs when an LED's emitted photon energy nearly matches its band gap?