Continuous and mechanical variable valve timing adjusting device for internal combustion engine

Abstract

The invention provides a continuous and mechanical variable valve timing adjusting device for an internal combustion engine, belonging to the technical field of internal combustion engines. The device comprises a crankshaft, a cam shaft, a cam, a driving gear, an intermediate gearing, an input center gear, a planet gear, a planet gear carrier, an output center gear and an adjusting device, wherein the front end of the crankshaft is installed at the axle center of the driving gear; the intermediate gearing is meshed with the driving gear and an outer gear ring of the input center gear respectively; the planet gear is meshed with an inner gear ring of the input center gear and the output center gear respectively; the front end of the cam shaft is installed at the axle center of the output center gear; and the adjusting device is connected with the planet gear carrier by a connecting shaft. In the working process of the device, when the planet gear carrier rotates in a certain direction,the rotating speed of the output center gear is increased or decreased, thus changing the rotation phase between the cam shaft and the crankshaft and realizing adjustment of valve timing. The device has reasonable design, simple structure, good reliability and higher adjustment precision and is easy to add on the original engine.

Description

technical field [0001] The invention relates to a valve adjustment device in the field of internal combustion engines, in particular to a continuously variable valve timing mechanical adjustment device for internal combustion engines. Background technique [0002] Energy saving and emission reduction is a major topic of common concern in the field of internal combustion engines. The valve timing of the engine directly affects the charging efficiency of the engine, and thus has a very important impact on the combustion process in the cylinder of the engine. The variable valve timing technology optimizes the charge into the cylinder by adjusting the valve timing of the engine under different operating conditions, thereby improving the power and economy of the engine. The ideal valve timing law should be able to adjust properly in time according to the change of engine operating conditions, and this adjustment should be continuous and have sufficient flexibility. When the eng...

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Problems solved by technology

[0003] Through the retrieval of prior art documents, it is found that the patent application number is 200610069982.5, the publication number is CN1959072, and the name is an invention patent of a continuously variable valve timing system for an internal combustion engine controlled by electro-hydraulic control. In its specific embodiment, it can only It is difficult to control the valve opening time by controlling the falling and closing time of the valve,

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