Seating buffer type electromagnetic full-variable air valve control system and method

Abstract

The invention provides a seating buffer type electromagnetic full-variable air valve control method. As for a fast deceleration phase and stable seating phase of an air valve, the method includes thefollowing implementation steps that in the fast deceleration phase, the peak speeds and the deceleration distance of the air value are collected, a fast deceleration target speed of the air valve is preset, an ECU calculates a damping force generated by a variable damping buffer device according to the peak speeds to change the speed of the air valve, the real-time speed of the air valve is periodically collected, and if the real-time speed of the air valve is equal to the preset fast deceleration target speed of the air valve, an electromagnetic force is removed; in the stable seating phase,the distance between the air valve and an air valve seat is collected, and if the distance is within a preset range, the ECU reduces the voltage of a main control circuit of the variable damping buffer device to zero.

Description

technical field [0001] The invention relates to an internal combustion engine technology, in particular to a seat buffer type electromagnetic fully variable valve control system and method. Background technique [0002] It is one of the frontiers of engine design and electronic control technology research using electromagnetic fully variable valves. The engine uses electromagnetic fully variable valves, and the intake valve and exhaust valve are fully flexibly controlled by the engine electronic control unit to realize the independent and continuous adjustment of the engine valve lift, valve opening and closing angle and its motion law. One of the main problems it faces is that the valve seating is difficult to achieve "soft landing", resulting in valve seating shock, resulting in loud noise and reducing the life of the valve and valve seat ring, and even causing violent rebound of the valve, affecting the timely closing of the valve , resulting in difficulty in starting th...

AI Technical Summary

Problems solved by technology

The electromagnetic fully variable valve is a camless structure, and the valve seating speed cannot be constrained by the cam profile.

In the entire electromagnetic drive valve mechanism, the movement of the valve is controlled by the engine management control system in real time. However, due to the harsh working environment of the valve, it is very difficult to accurately control the valve. It is necessary to use an external device to effectively cushion the seat.

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