Event-driven synchronous control method for jet ignition of EFI si engine

Abstract

The invention provides a synchronous control method for air injection and ignition of an event-driven electronic injection gasoline engine. According to the control method, the tooth lacking positionscan be correctly judged according to crank signals for engine synchronization, and air injection and ignition event tooth numbers of all cylinders are calculated with the tooth lacking positions as the datum; and secondly, a new error-correcting mechanism is further introduced in the control method, executing of error events is delayed in this way, accordingly, the completeness of the time sequence in the working process of the engine is guaranteed, and precise synchronous control over air injection and ignition of the engine is achieved. In addition, the invention further provides a tooth packing finding and tooth number distributing method, thus the tooth lacking positions can be accurately found, and distribution of the tooth numbers can be achieved rapidly and efficiently. Through verification of a bench test, it is shown that under the control method, the Hainan Mazda Family 479Q-BA engine operates stably, air injection and ignition signals are accurate and effective, and the control method is feasible.

Description

technical field [0001] The invention relates to the technical field of synchronous control of jet ignition of an engine, in particular to an event-driven method for synchronous control of jet ignition of an electronic injection SI engine. Background technique [0002] As my country's emission standards become increasingly stringent and the energy crisis intensifies, automotive electronic control systems based on the combination of fuel metering and ignition timing have been widely used due to their economy, power, and safety. At present, the application scope of the electronic control system has been expanded to affect many aspects of the normal operation of the engine, such as: exhaust gas recirculation EGR, evaporative emission control, etc. [0003] In an electronic ignition system that uses no contacts or even no distributors, the control of jet and ignition timing is based on the correct judgment of the position of the crankshaft. normal operation. Therefore, designin...

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Problems solved by technology

[0004] However, there is no synchronous control method for the jet ignition of the EFI SI engine driven by events in the prior art. Therefore, after years of research, the inventor used the Haima Familia 479Q-BA engine (4 cylinders, 4 strokes, 16 valves, group ignition, sequential injection) as the research object, a set of event-driven EFI gasoline engine injection and ignition synchronous control strategy was designed, and a new error correction mechanism was introduced in the synchronous control strategy

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