Piston four stroke engine

Abstract

The invention provides a piston four stroke engine, comprising a valve actuating mechanism, an ignition device and a fueling injection device, which are arranged on cylinder head, wherein the actuating mechanism comprises a valve stem the external end of which is connected with an electromagnet component and the electromagnet component is composed of an upper electromagnet and a lower electromagnet which are in coaxial connection. The invention has the advantages that an electromagnetic magnetic circuit close is used as power to control immutable stroke of open and close of an air valve; a valve spring is not provided and motion line speed of the air valve is high; when air inflows, an intake valve can realize full open under the full stroke of descent of the piston, thereby ensuring full stroke air inflow for descent of the piston upward and sufficient air inflow; when exhausting the air, an exhaust valve can realize full open under the full stroke descent of the piston and for the piston stroking upward, thereby ensuring full stroke exhaust air for the piston stroking upward; and drift diameter of the exhaust valve is larger than that of the intake valve, the exhaust valve has small resistance and complete exhaust. When being in a state of high speed, lag behind and springback for the air valve does not occur, thereby eliminating air cross interference caused by an over-lapping angle of the air valve, implementing purification inside the engine, improving fuel availability and reducing environmental pollution.

Description

technical field [0001] The invention relates to a piston type four-stroke engine, including a piston type four-stroke engine of various fuels. Background technique [0002] The traditional four-stroke engine valve is mechanically circularly moved by the paraboloid of the cam. The cam lift overcomes the valve spring tension to force the valve to gradually open, and the valve closes under the action of the spring restoring force. The paraboloid of the physical limit cam cannot be made very steep, so The valve can only be controlled to the valve overlap angle of early opening and late closing to make up for the lack of intake air and incomplete exhaust, and the intake valve opens early. like figure 1 As shown by the arc-shaped band (its width indicates the degree of valve opening) and the arrow at one end (indicates the gradual closing angle of the valve phase rotation direction), the result of the early opening of the exhaust valve is that when the exhaust stroke is not compl...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a piston-type four-stroke engine to solve the problems of low engine efficiency, large fuel loss and environmental pollution due to the early opening and late closing of the valve and the short duration of spark ignition in the prior art

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