What are the effects of excessive or insufficient ignition advance angle on the engine?
2 Answers
The effects of excessive or insufficient ignition advance angle on the engine are as follows: 1. Excessive ignition advance angle: The combustible mixture is ignited too early, and the expansion pressure generated by gas combustion will hinder the upward movement of the piston, resulting in reduced engine power, increased fuel consumption, poor idle speed, and sometimes even causing the crankshaft to reverse or break. 2. Insufficient ignition advance angle: It also leads to a decrease in engine power and an increase in fuel consumption. Because the combustion of the mixture is delayed until the working volume of the cylinder rapidly increases, the maximum pressure generated by the combustion gas is weakened, the thermal energy of combustion cannot be fully utilized, more heat is transferred to the cooling water, and the engine will overheat. As a result, phenomena such as backfiring in the exhaust pipe and backfire in the engine intake port often occur.
Having driven for decades, I've found improper ignition timing settings to be truly troublesome. If set too advanced, the spark occurs too early, causing premature fuel ignition during compression that leads to severe engine knocking. This subjects pistons and cylinder walls to impact wear, significantly reducing engine lifespan over time. If set too retarded, the delayed spark results in incomplete combustion, making the vehicle struggle on inclines while dramatically increasing fuel consumption and wasting money. My old car exhibited these exact symptoms due to misadjusted parameters, which a mechanic later diagnosed. In summary, improper ignition timing not only affects driving smoothness but may also cause detonation failures. I recommend regular engine setting inspections as preventive maintenance. With today's expensive vehicles, it's unwise to risk major issues by skimping on minor maintenance costs.
