Is there a relationship between gas engine detonation and valves?

There is indeed a certain relationship between gas engine knock and valve, which is mainly reflected in the influence of valve clearance on engine knock. The following is a detailed explanation of this viewpoint:

1、 The relationship between valve clearance and detonation

Valve clearance refers to the gap between the valve and the valve seat. The size of this gap has a significant impact on the performance of the engine. When the valve clearance is not appropriate, it may cause changes in the opening and closing time of the valves, thereby affecting the intake and exhaust processes of the engine. This change may cause the gas mixture to automatically explode before the spark plug ignites, leading to detonation.

2、 Definition and hazards of detonation

Detonation refers to the phenomenon in the combustion chamber where the gas mixture automatically detonates before the spark plug ignites, causing cylinder vibration. Knocking can cause engine shaking, increased noise, and may be accompanied by metallic knocking sounds. In severe cases, detonation can cause a decrease in engine power, a surge in temperature, an increase in gas consumption, worsening emissions, and may even lead to serious consequences such as engine stalling, piston cracking, melting, and damage to engine mechanical components.

3、 Other factors that cause detonation

In addition to improper valve clearance, there are various other factors that may cause detonation, including:

Ignition angle too early: When the ignition angle is too early, it can cause premature spontaneous combustion of the gas mixture, leading to detonation.

Excessive carbon buildup in the engine: Carbon buildup can become a ignition source for self ignition points, leading to detonation.

Excessive engine temperature: High temperatures increase the likelihood of spontaneous combustion of the gas mixture, leading to detonation.

Incorrect air-fuel ratio: When the air-fuel ratio deviates from the normal range, the gas mixture in the combustion chamber is prone to spontaneous combustion, leading to detonation.

Low octane rating of fuel: The lower the octane rating, the more unstable the combustion, thereby increasing the probability of detonation.

In summary, there is a certain relationship between gas engine detonation and valve clearance, but the occurrence of detonation may also be influenced by various other factors. Therefore, when solving the problem of detonation, it is necessary to comprehensively consider various factors and take corresponding measures for investigation and repair.