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Valve control apparatus for engine

An engine and valve control technology, applied in the direction of engine control, valve device, valve drive device, etc., can solve the problems of complex engine structure and rising engine cost, and achieve the effect of improving fuel efficiency, reducing discharge and increasing torque

Pending Publication Date: 2021-08-10
DOOSAN INFRACORE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, when the exhaust gas recirculation system and the selective catalytic reduction system are applied to the engine in order to reduce nitrogen oxides in the exhaust gas, not only the cost of manufacturing the engine is greatly increased, but also the structure of the engine becomes quite complicated.

Method used

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  • Valve control apparatus for engine
  • Valve control apparatus for engine
  • Valve control apparatus for engine

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Embodiment Construction

[0035] Embodiments of the present invention will be described in detail below with reference to the accompanying drawings, so that those skilled in the art of the present invention can easily implement them. The present invention can be implemented in many different forms and is not limited to the embodiments described here.

[0036] It should be pointed out that the drawings are schematic and not drawn to scale. For the sake of clarity and convenience in the drawings, the relative sizes and ratios of the parts shown in the drawings are illustrated exaggerated or reduced in size, and any size is only illustrative rather than limiting. In addition, the same reference numerals are used for the same structures, elements or components appearing in more than two figures to indicate similar features.

[0037] The embodiments of the present invention specifically illustrate ideal embodiments of the present invention. As a result, various deformations of the illustrations are expect...

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PUM

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Abstract

The present invention relates to a valve control apparatus for an engine, wherein the valve control apparatus opens and closes an exhaust valve and an intake valve of the engine while rotating in conjunction with a crankshaft of the engine. A valve control apparatus for an engine according to an embodiment of the present invention comprises: an exhaust valve opening / closing device for opening and closing the exhaust valve during a first exhaust valve opening period; and an intake valve opening / closing device for opening and closing the intake valve during a first intake valve opening period.

Description

technical field [0001] The present invention relates to a valve control device for controlling the opening and closing of an exhaust valve and an intake valve of an engine. Background technique [0002] Generally, a valve control device of an engine includes a camshaft in which cams for opening and closing exhaust valves and intake valves of each cylinder are combined on one shaft. [0003] Taking a four-stroke engine as an example, the cycle of the engine consists of four piston strokes: intake, compression, explosion, and exhaust. That is, one cycle is completed between two revolutions of the crankshaft. In addition, an intake valve and an exhaust valve of each cylinder are attached to a cylinder head of the engine, and the opening and closing of the intake valve and the exhaust valve are performed by the rotation of a camshaft that rotates in conjunction with the crankshaft. At this time, the camshaft is connected to the crankshaft via a timing chain or the like to rota...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D13/02F01L13/00F01L1/047F01L1/08
CPCF01L1/08F01L1/047F01L13/0015F01L1/053F02D13/0207F01L2001/0537F01L2001/0535F01L2800/10F01L2250/02F01L2820/01F02D13/0273Y02T10/12F02D41/006F02D13/0203
Inventor 曺慈允韩瑛德俞德根姜东明郑旭金正浩边钟旭李永勋金泰燮
Owner DOOSAN INFRACORE CO LTD