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Internal conmbustion engine valve different lifting device and method thereof

A technology of different lifts and internal combustion engines, which is applied in the direction of valve devices, valve driving devices, mechanical equipment, etc., can solve problems such as poor flow capacity, and achieve the effect of improving internal combustion engine performance, combustion speed and fuel economy

Inactive Publication Date: 2010-04-28
张士强
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the structure of double intake valves is mostly used to improve the flow capacity, but the two intake valves move under the same lift, especially when the double intake valves are fully opened, due to the symmetry of the flowing gas in the gasoline engine, each The vortices cancel each other out, and there is almost no large-scale vortex, but only tumble flow. In order to obtain a strong vortex, one of the intake valves must be closed, but the flow capacity is worse than that of the double intake valves. The above-mentioned prior art is insufficient The point is: the same lift of the two intake valves sacrifices the swirl to ensure the flow, and the single opening of one intake valve sacrifices the flow to obtain the swirl

Method used

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  • Internal conmbustion engine valve different lifting device and method thereof
  • Internal conmbustion engine valve different lifting device and method thereof
  • Internal conmbustion engine valve different lifting device and method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0052] As shown in Figure 1(A), it includes a symmetrical profile cam and an asymmetrical profile cam or two asymmetrical profile cams. The maximum lift heights of the symmetrical profile cam and the asymmetric profile cam are the same, and are set on the cam The maximum lift points on the axial projection of the group of cams on the shaft coincide; the two intake valves are pushed by the two intake cams on the camshaft, the opening lift is different, and the closing lift is the same; the valve opening process There is a lift difference in the medium, there is a large-scale vortex, from weak to strong and then weakened; there is no lift difference in the valve closing process, but due to the vortex inertia at the beginning of the closing, the large-scale vortex disappears after a short period of time, as shown in Figure 1(B) The lift effect of the first embodiment is shown.

Embodiment 2

[0054] As shown in Figure 2(A), it includes a symmetrical profile cam and an asymmetrical profile cam or two asymmetrical profile cams. The maximum lift heights of the symmetrical profile cam and the asymmetric profile cam are the same, and are set on the cam The maximum lift points on the axial projection of the group of cams on the shaft coincide; the two intake valves are pushed by the two intake cams on the camshaft, the opening lift is the same, and the closing lift is different; when the valves are opened During the process, there is no lift difference and no large-scale vortex. During valve closing, there is a lift difference and large-scale vortices are generated, from weak to strong and then weakened to disappear. Figure 2(B) shows the second embodiment. The lift effect. The difference between the second embodiment and the first embodiment is that the device used in the first embodiment makes the valve opening lift different and the closing lift is the same; while the ...

Embodiment 3

[0056] As shown in Figure 3, it includes two asymmetric profile cams, the maximum lift height of the two asymmetric profile cams is consistent, and the maximum lift point on the axial projection of the group of cams set on the camshaft is In the non-coincident position, the two asymmetric contour cams are symmetrically distributed in the axial projection; the two intake valves are pushed by the two intake cams on the camshaft, and the opening lifts are different and the closing lifts are different. Different (except for the same point of lift); large-scale vortices exist during valve opening and valve closing. Due to the same lift point in the intermediate process and the influence of vortex inertia, a short period of time after the beginning of the valve closing process The large-scale vortex will gradually disappear, and then due to the increase of the lift difference, the large-scale vortex will appear again. Because the magnitude of the vortex intensity of the two intake val...

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Abstract

The invention discloses a combustion air valve different raising device which improves the air channel and the flow inside the cylinder, which is a set of cam includes a symmetric jam and a non-symmetric jam or two non symmetric jams; or includes a symmetric jam and a non-symmetric jam or two non symmetric jams. The maximum raising point on the axial project is a non doubling position, above two non-symmetric jam is symmetric at axial projection; each group of jams has the same maximum raising. The invention also discloses the actualizing method with above device.

Description

Technical field [0001] The invention relates to an internal combustion engine valve movement method and a device for implementing the method, in particular to a two-intake valve internal combustion engine valve movement method and a device for implementing the method. Background technique [0002] The combustion of internal combustion engines during operation is one of the main factors causing air pollution. Its harm to human health and the environment has been widely concerned, and reducing the emissions and fuel consumption of internal combustion engines has become a worldwide issue. The air movement in the cylinder of an internal combustion engine has a decisive influence on the formation and combustion process of the mixture, and also affects the power, economy, combustion noise and harmful gas emissions of the internal combustion engine. Well-organized air movement in the cylinder is an effective way to meet increasingly stringent emissions and fuel economy requirements. T...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01L1/08F01L13/00
Inventor 张士强
Owner 张士强
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