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Combined camshaft with variable wrap angle, engine and automobile

A technology of combining cams and camshafts, which is applied to engine components, engine control, combustion engines, etc., can solve the problems that the valves cannot be automatically adjusted, and cannot fully meet the engine's gas distribution requirements, so as to achieve the effect of meeting the gas distribution requirements

Active Publication Date: 2020-12-18
DONGFENG MOTOR CORP HUBEI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, in the related art, the existing camshaft is a single cam, and the valve opening duration cannot be automatically adjusted, which cannot meet the requirements of the above two cycles at the same time, and cannot fully meet the actual gas distribution requirements of the engine.

Method used

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  • Combined camshaft with variable wrap angle, engine and automobile
  • Combined camshaft with variable wrap angle, engine and automobile
  • Combined camshaft with variable wrap angle, engine and automobile

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Embodiment Construction

[0024] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0025] see figure 1 , figure 2 As shown; the embodiment of the present invention provides a combined camshaft with variable wrap angle, including a camshaft structure 1, a combined cam structure 2 and a cam rotation driving structure 3; the camshaft structure 1 includes a cam inner shaft 10, and a movable The cam sleeve 11 sleeved outside ...

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Abstract

The invention relates to a combined camshaft with a variable wrap angle, an engine and an automobile. The combined camshaft with the variable wrap angle comprises a camshaft structure, a combined camstructure and a cam rotation driving structure, wherein the camshaft structure comprises a cam inner shaft and a cam sleeve movably arranged outside the cam inner shaft in a sleeving mode; the combined cam structure comprises a plurality of fixed cams arranged on the cam sleeve and a rotating cam structure movably arranged outside the cam sleeve in a sleeving mode, the rotating cam structure is connected with the cam inner shaft, and the rotating cam structure is located between every two adjacent fixed cams; and the cam rotation driving structure comprises a driving shell arranged at one endof the cam sleeve and a hydraulic rotation driving main body arranged in the driving shell, and the hydraulic rotation driving main body is connected with the cam inner shaft and used for driving thecam inner shaft to rotate relative to the cam sleeve so as to drive the rotating cam structure to rotate. Therefore, the opening duration of an air valve can be automatically adjusted, and the actualair distribution requirement of the engine can be fully met.

Description

technical field [0001] The invention relates to the technical field of automobile engines, in particular to a combined camshaft with variable wrap angle, an engine and an automobile. Background technique [0002] At present, the camshafts of gasoline engines are all designed with a fixed wrap angle, which means a fixed valve opening duration and a fixed valve overlap angle; with the further stringent requirements on fuel consumption and emission of traditional gasoline engines, Atkinson-Miller cycle and other technical trends are gradually developing; this type of engine is an Atkinson cycle at low-to-medium speed and low-to-medium load, and the longer duration of intake valve opening can delay the closing time of the intake valve, changing the Its expansion ratio; at high load, it is necessary to realize the Otto cycle to ensure power performance, and at this time, the closing time of the intake valve is required to be advanced. [0003] However, in the related art, the ex...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01L1/047F01L13/00F02D13/02
CPCF01L1/047F01L13/00F02D13/0215F02D13/0253F01L2001/0473Y02T10/12
Inventor 孟成林飞秦志欣熊振坤洪柳
Owner DONGFENG MOTOR CORP HUBEI
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