I believe that many riders are very interested in the data of "detonation", but they do not know much about what "detonation", "detonation delay" and "detonation control" are, and what are the differencesToday we're going to tell you about it
Let's first understand, what is detonation?
Detonation refers to the phenomenon of premature spontaneous combustion of gas mixtures before or during ignition in an internal combustion engine, resulting in an abnormal combustion process. The main reasons include spontaneous combustion under high temperature and high pressure conditions, early ignition and high air-fuel ratio.
One person and one sentence cheer for the graduate school entrance examination When a detonation occurs, what phenomena are accompanied?What are the effects on the vehicle?
1.When there is a "knocking" phenomenon, it usually makes a sound similar to a knock or pop.
2.The engine shakes, and the body of the car shudders.
3.Abnormal dynamics, degraded performance, loss of power, reduced acceleration, and sluggishness may occur.
4.The fault light is illuminated, which is caused by the ECU (Vehicle Electronic Control Unit) sensing abnormal combustion or engine problems.
5.Exhaust emissions are abnormal, which is due to incomplete combustion of abnormal exhaust gases, which produce excessive exhaust gases and exhaust black or other colored smoke from the exhaust pipe.
6.Damage to internal engine parts such as pistons, cylinder walls, and crankshafts may occur.
What are the strategies for vehicles to prevent knocking?
1.Detonation Control Strategy:
Ignition timing control: By adjusting the ignition timing, the combustion rate of the gas mixture can be affected, thereby reducing the risk of detonation. At high loads or speeds, the ignition timing can be advanced, while at low loads or low speeds, knocking can be prevented by delaying the ignition timing. Terms such as "detonation delay, detonation deignition" all refer to the control of ignition timing.
Air/Fuel Ratio Control: Maintaining an appropriate air/fuel ratio is also critical to prevent knocking. An excessively high air-fuel ratio increases the risk of spontaneous combustion, so controlling the fuel injection system to maintain a suitable gas mixture composition is part of detonation control.
We can use the OBD meter to view the detonation delay or detonation control data, once the detonation strategy is triggered, the instrument will automatically prompt.
Why detonation control?
Performance Improvements: With reasonable ignition timing control and detonation delay, modified vehicles can achieve higher power output and faster acceleration response, improving overall performance. Reliability: Knock control not only helps improve performance, but also protects the engine from potential knock hazards, extending engine life and reducing maintenance costs. In the field of modified vehicles, the problem of knocking has become a need to attract the attention of car enthusiasts. Through strategies such as meticulous ignition timing control, air/fuel ratio adjustment, and flexible use of detonation delays, modders are able to maintain engine stability and reliability while improving performance. This opens up more possibilities for tuners to better balance power performance, fuel efficiency and engine health in engine tuning.