Self-learning control method, system and vehicle for variable valve timing system

Abstract

The invention provides a self-learning control method, system and vehicle of a variable valve timing system, belonging to the field of vehicles. The self-learning control method includes: controlling the engine speed and load of the range extender to increase with a preset slope, so that the time for the range extender to meet the self-learning activation conditions reaches the self-learning requirement time of the variable valve timing system; When the engine meets the self-learning activation conditions, control the variable valve timing system to carry out self-learning; judge whether the self-learning of the variable valve timing system is completed; correct according to the self-learning value of the variable valve timing system after the self-learning is completed The reference point position of the variable valve timing system. The invention also provides a self-learning control system corresponding to the self-learning control method and a vehicle including the self-learning control system. The self-learning control method, system and vehicle of the present invention can ensure the success of the self-learning of the range extender, thereby ensuring the normal operation of the engine of the range extender.

Description

Technical field [0001] The present invention belongs to the field of vehicle, particularly a self-learning control method, system, and vehicle of a variable valve timing system. Background technique [0002] With the development of internal combustion engine technology, in order to achieve higher performance indicators, various emerging technologies are applied to internal combustion engines, of which the engine variable valve timing technology (VVT, VARIABLE VALVE TIMING) is one of which, the technology changes the engine The gas phase, thereby increasing the intake charge, improves the torque and power of the engine while significantly reducing fuel consumption and discharging pollutants. The core of the VVT ​​technology is based on different speeds, and different loads determine the best valve overlap angle. As the engine speed rises, the absolute time of intake and exhaust gas in the cylinder, the faster the air flow in the intake manifold or exhaust manifold, the engine need...

AI Technical Summary

Problems solved by technology

That is, the current control strategy cannot guarantee the self-learning time of VVT

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