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Air inlet and outlet cam on canshaft of internal combustion engine

A technology of exhaust cams and camshafts, applied in mechanical equipment, engine components, machines/engines, etc., can solve the problems of reducing the fullness coefficient of the cam profile, affecting the charging efficiency and exhaust efficiency, and the power drop of the internal combustion engine, etc.

Inactive Publication Date: 2006-11-15
晏家全
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the following problems in the design of the cam profile of the traditional internal combustion engine camshaft, the end point of the valve opening buffer section is set after the valve clearance point is eliminated, and the beginning point of the valve closing buffer section is set before the valve clearance point begins to appear. The advanced design technology reduces the fullness coefficient of the cam profile, which affects the charging efficiency and exhaust efficiency, and reduces the power of the internal combustion engine

Method used

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  • Air inlet and outlet cam on canshaft of internal combustion engine
  • Air inlet and outlet cam on canshaft of internal combustion engine
  • Air inlet and outlet cam on canshaft of internal combustion engine

Examples

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Embodiment Construction

[0013] figure 1 It shows the schematic diagram of the intake and exhaust cam profiles on the camshaft of the existing internal combustion engine. This figure is extracted from the camshaft in the tenth "Gas Distribution Phase" of "Jiefang CA1091 Truck Atlas" published by Liaoning Science and Technology Publishing House Cam profile diagram. In the figure, 1 is the cam, point 9 is the center of the cam shaft, point 7 is the elimination of the valve clearance, point 8 is the beginning of the valve clearance, point 4 is the maximum lift of the valve, point 6-point 1 is the base circle of the cam 10, point 2- Point 3 is the valve opening buffer section 11, point 3-point 4-point 5 is the working section 12, and point 5-point 6 is the valve closing buffer section 13. The figure shows that the end point 3 of its valve opening buffer section 11 is located after the valve clearance point 7 is eliminated in the cold state, and the starting point 5 of its valve closing buffer section 13 ...

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Abstract

There is disclosed an air inlet and exhaust cam on the camshaft of internal-combustion engines, whose contour includes a base circle, air valve opening and closing buffer sections and a working section. In a cold state, the end of the air valve opening buffer section is set in front of the air valve clearance eliminating point and the initial point of the air valve closing buffer section is set at the back of the air valve clearance appearing point. Using the inventive structure can extend the cam angle of the working section, so as to increase the power output of the internal-combustion engines.

Description

Technical field: [0001] The invention relates to an intake and exhaust cam on a camshaft of an internal combustion engine. The cam profile includes a base circle, a valve opening buffer section, a working section and a valve closing buffer section. Background technique: [0002] The work of the internal combustion engine is to do work through the combustion of fuel in the cylinder, so as to output power externally. In the case of a certain internal combustion engine displacement, if you want to increase the power output, the effective way is to provide more fuel and make it burn effectively and fully. However, it is easy to provide more fuel to the cylinder, but you must provide More air makes it more difficult to burn the fuel properly. The crankshaft speed of the internal combustion engine is very high, and each stroke of the piston lasts very short. For example, the engine of the Shanghai Santana sedan has a speed of 5600r / min at maximum power, and a stroke lasts only 0....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01L1/08
CPCF01L1/22F01L1/08
Inventor 晏家全
Owner 晏家全
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