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Camshafts for internal combustion engines

A camshaft, internal combustion engine technology, applied in mechanical equipment, engine components, machine/engine, etc., to solve problems such as camshaft installation and placement restrictions

Active Publication Date: 2021-11-16
乌伟·艾森拜斯
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Furthermore, since the control shaft 53 is arranged on the axis of rotation, at least one shaft end of the camshaft must be accessible, which leads to restrictions on the installation and placement of the camshaft

Method used

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  • Camshafts for internal combustion engines
  • Camshafts for internal combustion engines
  • Camshafts for internal combustion engines

Examples

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Embodiment Construction

[0026] figure 1 with figure 2 A valve mechanism for an exhaust gate 70 for an internal combustion engine is shown in accordance with an embodiment of the present invention. The camshaft 10 includes a cam 11 which is arranged to actuate exhaust valve 70. The camshaft 10 rotates around its axis. For this purpose, the camshaft 10 is supported on the cylinder head by bearings 8a, 8b, and thus supports both sides by bearings 8a, 8b. Therefore, it is a top camshaft. The camshaft 10 also includes a centrifugal element 21, which is described in more detail below with respect to Figures 3 and 4.

[0027] The mounts 8a, 8b on both sides allow advantageous power transfer between the cams and valves, because avoiding undesirable curved vibration of the camshaft. The mounting member on both sides also enables flexible control of the valve mechanism; the drive gear or chain drive gear or chain drive gear or chain drive gear connected to the internal combustion engine is located on one side 7a ...

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PUM

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Abstract

The invention relates to a camshaft (10) mounted at both ends for outlet valves (70) of an internal combustion engine, said camshaft having a cam (11) and a release mechanism (20). The cam (11) defines a cam profile (16) for periodically actuating the outlet valves by rotation of the camshaft and comprises a cam body (12) and a cam profile element (40). The cam profile element (40) is movable relative to the cam body (12) to a first cam profile position and a second cam profile position in such a manner that the cam profile (16) is at the first cam profile position when the cam profile element (40) is The cam profile element has a first cam profile shape when in a second cam profile position, and has a second cam profile shape different from the first cam profile shape when the cam profile element is in a second cam profile position. A release mechanism (20) for a cam profile element (40) is configured to maintain said cam profile element in a first cam profile position at a first, lower rotational speed of said camshaft, and to maintain said cam profile element at a second, higher rotational speed. The cam profile element is maintained in a second cam profile position at rotational speed.

Description

Technical field [0001] One aspect of the invention relates to a camshaft for exhaust valve for an internal combustion engine. According to one aspect, the cam shaft has a movable cam profile element obtaining the cam contour shape associated with the rotational speed by means of the cam profile element. Background technique [0002] The valve mechanism for generating valve strokes having a fixed stroke height and the travel duration of the trip is usually used in an internal combustion engine by means of a camshaft. However, such valve mechanisms have a disadvantage in terms of the best adaptation of different load ranges of the internal combustion engine. In addition, once the engine is started during the start phase, the camshaft will actuate the valve mechanism; however, the energy of the gas used in the compressed combustion chamber must be applied by the starting engine, which may be unfavorable during the start of the start. [0003] In order to adapt to such a need, there ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01L13/08F01L1/047
CPCF01L1/047F01L13/085
Inventor 乌伟·艾森拜斯
Owner 乌伟·艾森拜斯