Which outcome occurs in a modern gasoline direct injection engine operating at high temperature with lean fuel mixture?

💡 Explanation

When a lean fuel mixture is burned at high temperature in a GDI engine, Zeldovich mechanism prevails, resulting in increased nitrogen oxide (NOx) formation due to the higher availability of oxygen atoms at elevated temperature. Therefore increased NOx formation results, rather than reduced knock or improved efficiency which happens at rich mixtures, or increased particulates which relates to incomplete combustion of the fuel.

• Which outcome occurs when contaminants block a hydraulic actuator's servovalve?
• Which risk increases when automated landing systems experience radio altimeter anomalies?
• Which risk increases when a stall fence on an aircraft wing is damaged during flight?
• Which risk increases for hydroelectric power distribution systems experiencing sustained reactive power imbalance?
• Which consequence results when a tailstrike occurs during takeoff?
• Which risk increases when a PLC controlling a robotic arm's trajectory uses floating-point arithmetic without proper range checks?