Cam profile, cam applying profile and diesel engine applying cam

A cam and profile technology, applied in the direction of valve details, valve driving devices, etc., can solve the problems of lack of buffer section of the cam, high valve seating speed, lack of continuous full opening section, etc., to achieve the goal of improving the fullness coefficient and air intake capacity Effect

Inactive Publication Date: 2019-12-20
CHONGQING WEICHAI ENGINE FACTORY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The common cam in the prior art lacks a buffer section, and the deformation of the mechanism in the dynamics affects the position when seated, causing the seat speed of the air valve to be too high, exceeding the design limit, and reducing the reliability of the air valve
There is also a lack of a continuous full-open section, resulting in a reduction in the fullness coefficient and inflation coefficient

Method used

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  • Cam profile, cam applying profile and diesel engine applying cam

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Embodiment Construction

[0022] Embodiments of the present invention are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation modes, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the diagrams provided in the following embodiments are only schematically illustrating the basic concept of the present invention, and the following embodiments and the features in the embodiments can be combined with each other in the case of no conflict.

[0023] Wherein, the accompanying drawings are for illustrative purposes only, and represent only schematic diagrams, rather than physical drawings, and should...

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Abstract

The invention belongs to the field of engines, and relates to a cam profile, a cam applying the profile and a diesel engine applying the cam. The cam profile comprises a base circle part and a peach-shaped contour part which are mutually connected into a closed curve; the peach-shaped contour part comprises a plurality of contour sections and sequentially comprises an opening buffer section, an opening stable section, an ascending section, a continuous full-opening section, a descending section, a closing stable section and a closing buffer section which are connected end to end; and every twoadjacent contour sections in the peach-shaped contour part is in smooth transition. According to the cam profile, According to the cam profile, the ascending section / descending section and the opening buffer section / closing buffer section of the peach-shaped profile part are blocked, so that the impact load of an air valve is effectively reduced, and the design limit value is met; and by improving the air inlet rates of the ascending section and the descending section and introducing the continuous full-opening section, the fullness coefficient of the cam profile is effectively improved, andthe air inlet capacity of the diesel engine is improved.

Description

technical field [0001] The invention belongs to the field of engines and relates to a cam profile, a cam using the profile and a diesel engine using the cam. Background technique [0002] Due to the design and manufacturing limitations of the cam profile, and because of the power increase and working conditions of the diesel engine, it has brought many adverse effects on the valve. Different working conditions have different requirements for diesel engine performance. In order to improve the working conditions of the valve and improve the reliability of the valve, it is necessary to design the corresponding cam profile. [0003] The common cam in the prior art lacks a buffer section, and the deformation of the mechanism in the dynamics affects the position when seated, causing the seat speed of the valve to be too high, exceeding the design limit, and reducing the reliability of the valve. There is also a lack of a continuous full-open section, resulting in a reduction in t...

Claims

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Application Information

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IPC IPC(8): F01L1/08
CPCF01L1/08
Inventor 郑小华段艳强向本银和晓锋杨栋郭庆
Owner CHONGQING WEICHAI ENGINE FACTORY
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