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Variable cycle engine

An engine, variable technology, applied in the direction of engine operation, engine components, engine control, etc., can solve the problems of reduced compression ratio, deteriorated ignition performance, unachievable compression ratio, etc., to reduce vibration and noise, and improve fuel consumption efficiency. Effect

Active Publication Date: 2014-06-11
HYUNDAI MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] However, in the cold state, the reduction of the compression ratio deteriorates the ignition performance, the glow system must be made of ceramic material in order to improve its durability, and a separate control unit must be used to control the glow system, which increases the cost
Moreover, depending on the driving conditions, the fixed compression ratio makes it impossible to achieve the optimal compression ratio

Method used

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Embodiment Construction

[0027] Reference will now be made in detail to various embodiments of the present invention, examples of which are illustrated in the accompanying drawings and described below. While the invention will be described in conjunction with exemplary embodiments, it will be appreciated that present description is not intended to limit the invention to those exemplary embodiments. On the contrary, the invention is intended to cover not only the exemplary embodiments but also various alternatives, modifications, equivalents and other alternatives, modifications, equivalents and others, which may be included within the spirit and scope of the invention as defined by the appended claims. implementation plan.

[0028] figure 1 is a schematic top view of the interior of an exemplary variable cycle engine according to the present invention. refer to figure 1 , the variable cycle engine includes intake manifold 100, intake port 105, intake valve 110, first cylinder C1, second cylinder ...

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Abstract

A variable cycle engine may include a first cylinder that performs an intake, a compression, an explosion, or an exhaust stroke, a second cylinder that performs an intake, a compression, an explosion, or an exhaust stroke, a connection rail that is formed near the first cylinder and the second cylinder, a first variable port that is diverged from one side of the connection rail and is connected to the first cylinder, a second variable port that is diverged from the other side of the connection rail and is connected to the second cylinder, and a first variable control valve disposed on the first variable port and a second variable control valve disposed on the second variable port, wherein the first and second variable control valves are opened or closed accordingly with respect to each other to directly connect the first cylinder with the second cylinder.

Description

[0001] Cross References to Related Applications [0002] This application claims priority from Korean Patent Application No. 10-2012-0141287 filed on December 6, 2012, the entire contents of which are hereby incorporated by reference for all purposes. technical field [0003] The present invention selectively changes the compression ratio of cylinders to improve fuel consumption efficiency while reducing vibration and noise. Background technique [0004] Generally, the thermal efficiency of a thermal engine increases when the compression ratio is high, and also increases when the ignition timing is advanced to a predetermined level in the case of an ignition engine. [0005] However, when the ignition timing is advanced at a high compression ratio in a spark ignition type engine, abnormal combustion occurs, resulting in damage to the engine. Therefore, there is a limit to advancing the ignition timing, and it is necessary to bear the deterioration of the output due to this ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D15/00
CPCF02B75/02F02B47/08F02D13/06F02M25/0749F02D13/0276F02B69/06F02M25/0737F02M26/43F02M26/32Y02T10/12F02D15/04F02B75/18
Inventor 禹秀亨李源埈梁在椿郭永弘催炳永孔镇国辛起旭
Owner HYUNDAI MOTOR CO LTD