What is Corrected Ignition Timing Advance Angle?
2 Answers
Corrected ignition timing advance angle refers to the spark plug firing before the piston reaches the compression top dead center, igniting the combustible mixture in the combustion chamber, from the moment of ignition until the piston reaches the compression top dead center. Air-fuel ratio voltage correction: Under closed-loop control, the engine uses the feedback signal from the oxygen sensor to correct the air-fuel ratio. Through the correction function of the oxygen sensor, the amount of fuel injection can be controlled. When the feedback correction reduces the fuel quantity, the ignition timing advance angle increases accordingly; when the feedback correction increases the fuel quantity, the ignition timing advance angle decreases accordingly. Correction during warm-up: The ignition timing advance angle is corrected based on the engine's coolant temperature. Different coolant temperatures have varying effects on the engine's ignition timing advance angle. When the coolant temperature is low, the ignition timing advance angle increases to speed up ignition and help the engine warm up faster. As the coolant temperature rises, the correction value of the ignition timing advance angle gradually decreases.
I've been driving for almost 20 years and often chat with friends about engine stuff. Ignition timing advance angle, simply put, is the setting of when your engine ignites - too early or too late can cause issues. Correcting the ignition timing advance means automatically adjusting this ignition moment while driving, based on various sensor data like engine RPM, temperature, even road gradient. Why correct it? Because the car needs flexible ignition control under different conditions. For example, when you step on the accelerator to speed up, the engine is prone to knocking (that rattling sound), and correction can advance ignition to prevent knocking. Or at high altitudes where the air is thin, correction delays ignition to keep the engine running smoothly. Without correction, fuel consumption increases, the car loses power, and the engine gets damaged. Modern cars are computer-controlled, with almost fully automatic adjustments, making driving more worry-free. In short, this is one small detail of intelligent design that lets experienced drivers worry less.
