Method for controlling optimal ignition advance angle of gasoline direct injection engine

• Main Author: BAI YANFANG
• Format: Patent
• Language: Chinese; English
• Published: 29.10.2019
• Subjects: BLASTING; COMBUSTION ENGINES; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; IGNITION, OTHER THAN COMPRESSION IGNITION, FORINTERNAL-COMBUSTION ENGINES; LIGHTING; MECHANICAL ENGINEERING; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES; WEAPONS

The invention provides a method for controlling an optimal ignition advance angle of a gasoline direct injection engine. The method for controlling the optimal ignition advance angle of the gasoline direct injection engine comprises the following steps that after a basic ignition advance angle is set, a system analysis mathematical model is established by measuring three factors of engine water inlet temperature, engine air inlet temperature and engine air-fuel ratio. According to the method, modeling analysis is carried out through the influence of all the factors on the ignition advance angle, the integral mathematical model is established through comprehensively considering the influence of all the factors on the ignition advance angle, the ignition advance angle of an engine is alwayscontrolled at the optimal moment when the engine operates in any working conditions and circumstances, so that the power performance, the economical efficiency and the emission time of the engine areall in the optimal state.