A method and system for self-learning the octane number of oil products

Abstract

The present application relates to a method and system for self-learning of oil octane number. The method includes the following steps: dividing the knock intensity coefficient of the engine into three knock intensity levels: low, medium and high; Knock intensity level; count the number of knocking occurrences of low, medium and high knock intensity levels in each cylinder of the engine; judge whether the octane number of the engine oil satisfies the self-learning condition; when the self-learning condition of the oil octane number is satisfied, the engine Oil octane number self-learning update. The embodiments of the present application provide a method and system for self-learning of the octane number of an oil product. In an engine control system, a learning method for identifying the octane number of an oil product is designed, and the knocking intensity is divided into three different knocking levels. In the case of grades, the octane number of the oil is reduced to different degrees, and the recognized octane number is used as the adjustment input of the ignition advance angle control, thereby reducing the probability of engine knocking and reducing the damage to the engine caused by frequent knocking.

Description

technical field [0001] This application relates to engine knocking and ignition angle control, in particular to a method and system for self-learning the octane number of oil products. Background technique [0002] Gasoline engine knock is an abnormal combustion in the cylinder. Severe knocking will destroy the oil film on the cylinder wall, aggravate the wear of the cylinder wall, or directly cause damage to parts such as pistons and valves. At present, poor engine manufacturing, carbon deposits in cylinders, high intake air temperature, overheating of the engine, and use of inferior or low-octane gasoline may all cause engine knocking. Modern engine control systems are designed with knock control logic. By reading the signal of the knock sensor installed on the engine block, it is judged whether knocking occurs. shock. [0003] Due to differences in production processes and storage conditions, the octane number of the same oil will change. After the vehicle is filled w...

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Problems solved by technology

[0006] The embodiment of the present application provides a method and system for self-learning the octane number of oil products to solve the problem that the learning method for identifying the octane number of oil products is not designed in the engine control system in the related art, due to differences in production processes and storage conditions, etc. When the octane number of the same oil product changes, the probability of engine knocking is high, causing damage to the engine

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