Oil and gas mixture ratio is too lean or cause detonation will be uneven mix. Thick oil and gas will exhaust ignition autoignition delay time increases, but also make the relatively incomplete combustion, less heat is generated, so that the final combustion temperature is reduced, reducing the occurrence of knocking, but also lead to increased fuel consumption, thermal efficiency decline, while reducing engine output. Some engine knock control system is at the knock sensor detects a knock signal, fuel system and gas concentration will increase moderately until the knock eliminated.

       Intake air temperature and the cylinder temperature

       The volumetric efficiency of intake air temperature and the cylinder temperature causes an increase in the engine is reduced, so that the time required to complete the combustion of growth, i.e., the exhaust gas is pressurized and heated time increases, increase exhaust temperature and pressure, resulting in detonation. Thus, we can know when the engine temperature is too high, for the engine is not directly due to the damage caused by the high temperature (and the temperature inside the cylinder compared to it can not be called a high temperature), but because the cylinder wall temperature increases lead severe knock, knock again and again because of serious damage arising.

       Ignition timing

       If the premature ignition in the compression stroke of the piston top dead center before the arrival burn more oil and gas, will increase the required power piston compression, but also to improve the maximum combustion chamber temperature and pressure, easily generate the knocking. If the ignition timing is delayed, most of the oil and gas in the piston over the top dead center of combustion, Turbocharger Kits combustion of the piston has moved downward, can eliminate the bottom part of the gas pressure resulting from expansion of combustion increases, and mitigate blast shock trend. However, if the ignition too far behind, the power and efficiency of the engine will be reduced. Although the ignition timing of the engine can cause delay in weakness, increased fuel consumption, but the choice of the most knock control mode to change the ignition timing based, for not changing the ignition timing compared to other methods to eliminate knocking is more simple, economic and feasible, especially in the electronics technology developed especially today.

       Inlet pressure

       Intake pressure can improve oil and gas density becomes large, the total heat generated by the combustion more final combustion temperature will rise, prone to knock. This shows that when using a pressurized air intake device, whether turbocharged or supercharged often have to moderate with lower compression ratio, combined with knock control system to prevent the occurrence of knocking. Where the turbo system (Turbo Charger) will also cause more because the intake air temperature rises, Aftermarket Auto Parts so there intake cooler (Inter-Cooler) appeared to reduce the intake air temperature to improve the volumetric efficiency and reduce the occurrence of knocking. Related Articles: http://blogit.naimisiin.info/blogs/anahall/note/181323/since-the-establishment-should-be-modified.html http://annahall1.deviantart.com/journal/Interpretation-of-American-DUB-style-modification-505665232