Which risk significantly increases when the lambda of a gasoline engine drifts lean?

💡 Explanation

Fuel-lean conditions elevate exhaust temperatures; the catalytic converter overheats because oxidation reactions on the platinum and palladium surfaces increase exponentially. Therefore converter failure risk rises, rather than reduced knock since excessively lean mixtures cause pre-ignition.

• Which operational error arises when a PLC controlling a pick-and-place robot arm exceeds its program cycle time?
• Which risk abruptly increases when a communications satellite signal's frequency drifts outside the allocated band?
• Which programming inaccuracy increases when a robotic arm's joint angles, derived via inverse kinematics from the PLC, are near a singularity?
• Which process can cause thermal runaway in vapor-compression?
• Which outcome occurs when exceeding a Schottky diode's temperature rating?
• Which actuator failure mode results when the hydraulic fluid bulk modulus significantly decreases?