An electro-hydraulic fully variable gas distribution device and its control method

Abstract

The invention discloses an electro-hydraulic fully variable gas distribution device and a control method, which belong to the technical field of engine valves. The electro-hydraulic fully variable gas distribution device includes a buffer control valve, a lift control valve, a low-pressure fuel tank, a filter, a hydraulic Motor, accumulator, overflow valve, electromagnetic reversing valve, electro-hydraulic fully variable air distribution actuator, electronic control system and oil pipe and other auxiliary components; on the fully variable air distribution actuator, there are high pressure oil port, lift The stroke control oil port, the buffer control oil port, the cylinder throttle port and the five hydraulic chambers A, B, C, D, and E. By controlling the pressure of the hydraulic oil in these five chambers, the opening and closing of the engine air valve can be realized. Seating and other actions; by changing the power-on and power-off times of the two-position three-way valve, lift control valve, and buffer control valve, the opening phase and lift of the engine valve can be changed, and the flexible adjustment of the lift and phase of the valve and the adjustment of the valve can be realized. The duration of opening, so as to realize the fully variable movement of the valve.

Description

technical field [0001] The invention belongs to the technical field of engine air valves, and in particular relates to an electro-hydraulic fully variable air distribution device and a control method. Background technique [0002] With the increasing severity of world environmental problems and international energy crisis, it has seriously threatened the sustainable development of human society. With the rapid development of the internal combustion engine industry, people's demand for oil resources is increasing day by day, and the resulting problems such as environmental pollution and energy shortages have also followed one after another. Energy saving and environmental protection have become two important issues that the internal combustion engine industry has to face. question. In order to effectively solve these two problems, countries all over the world have higher and higher requirements for improving engine economy and controlling harmful emissions. Saving fuel and c...

AI Technical Summary

Problems solved by technology

The camless variable valve train developed at this stage has obvious advantages in gas distribution compared with the traditional valve train, but in these camless variable valve trains, the electromagnetic drive method is difficult to meet the high-pressure intake air and valve opening at the same time. According to the requirements of closing frequency and lift, electric drive has strict requirements on sealing, while the fully variable valve drive device driven by electro-hydraulic can break through the restriction of cam profile, realize the flexible adjustment of valve lift and phase, and improve the performance of the engine. The overall performance, so the electro-hydraulic drive is the easiest way to achieve

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