Multi-stage supercharging exhaust valve

Abstract

The invention aims to provide a multi-stage supercharging exhaust valve. The multi-stage supercharging exhaust valve comprises an exhaust valve seat, an exhaust valve reset spring, an exhaust valve reset spring seat, an exhaust valve rod, an exhaust valve hydraulic piston, a supercharging chamber, a hydraulic piston, a two-stage piston, a one-stage piston, a servo oil through hole and a hydraulic cavity, wherein the hydraulic cavity is formed between the one-stage piston and an exhaust valve body; the hydraulic cavity is communicated with a high-pressure servo oil pipe through a servo oil inlet; the one-stage piston is connected with the two-stage piston; the servo oil through hole is formed in the one-stage piston; a hydraulic plunger piston is tightly contacted with the two-stage piston due to a hydraulic force effect of servo oil inside the supercharging chamber; the supercharging chamber is formed between the hydraulic plunger piston and the exhaust valve hydraulic piston; the supercharging chamber is communicated with a servo oil tank through a servo oil suction one-way valve; the lower end of the exhaust valve hydraulic piston is tightly connected to the exhaust valve rod. According to the multi-stage supercharging exhaust valve, the degree of freedom for controlling the exhaust valve is great, exhaust timing and duration angle can be flexibly controlled, lift variability of the exhaust valve can be realized, and the discharge of an internal combustion engine and the economical efficiency of fuel oil can be improved further.

Description

technical field [0001] The invention relates to an engine, in particular to an exhaust valve of the engine. Background technique [0002] During the working process of the internal combustion engine, every time a working cycle is completed, the exhaust gas must be discharged from the cylinder, and the fresh air must be sucked into the cylinder. The intake and exhaust process must be carried out in strict accordance with the timing requirements of the internal combustion engine. The ignition sequence is carried out to ensure that the internal combustion engine operates under optimal conditions. The exhaust valve is one of the important parts of the exhaust system of the internal combustion engine. Its main function is to discharge the burned exhaust gas out of the combustion chamber within a specified time. have a great impact. The opening and closing time and action rules of the exhaust valve of the existing internal combustion engine are mostly controlled by the cam insta...

AI Technical Summary

Problems solved by technology

The opening and closing time and action rules of the exhaust valve of the existing internal combustion engine are mostly controlled by the cam installed on the camshaft in the timing gear system of the valve train through a set of transmission mechanisms. The cam is easy to wear and tear, and the mechanical transmission mechanism Disadvantages such as high working noise and high machining accuracy requirements, invariable exhaust phase and valve lift, and poor control accuracy

Images