Oil octane number recognition system

Abstract

The invention discloses an oil octane number recognition system, and is suitable for recognizing the oil octane number of an automobile engine. The oil octane number recognition system comprises a storage module, an input module, an air intake calculation module, an oil injection calculation module, a first processing module, a second processing module, a first signal generating module, an ignition advance angle self-learning module, an oil recognition module, a correction module and a judgment module, wherein the first processing module is used for presetting a torque model, inputting air inflow and oil injection quantity and calculating the actual torque of the automobile engine; the second processing module is used for calculating the ignition advance angle of the automobile engine; thefirst signal generating module and the ignition advance angle self-learning module are used for calculating and outputting the average correction of the ignition advance angle; the oil recognition module is used for recognizing the oil octane number according to the average correction of the ignition advance angle; the correction module is used for correcting the torque model according to the oiloctane number; and the judgment module is used for judging the quality of oil. The oil octane number recognition system has the beneficial effects that the oil octane number is recognized by softwarein an electronic control unit, the ignition advance angle of the engine is dynamically adjusted, and the knock tendency of the engine is reduced.

Description

technical field [0001] The invention relates to the field of electronic control of automobile engines, in particular to an oil octane number identification system. Background technique [0002] Gasoline engine knock is an abnormal combustion in the cylinder. After the spark plug is ignited, the flame propagates from the center of the flame to the unburned mixture area in the cylinder. During the normal flame propagation process, the unburned mixture far away from the spark plug is subjected to the compression, heat radiation and conduction of the burned mixture. When the unburned mixture forms one or more flame centers before reaching it and self-ignites, it is called detonation combustion. The flame propagation speed of detonation is dozens of times that of normal combustion, and pressure shock waves are generated in the cylinder, and obvious knocking sounds can be heard outside. Severe detonation will destroy the oil film on the cylinder wall, aggravate the wear of the cy...

AI Technical Summary

Problems solved by technology

After the vehicle is filled with new gasoline, due to the change of gasoline octane number, the ignition advance angle of the engine is not adjusted for timing, which will increase the probability of engine knocking and cause damage to the engine

Images