Multi-cylinder Miller cycle engine synergetic gas intake energy-saving device and control method thereof

An energy-saving device and engine technology, applied in the direction of engine control, combustion engine, engine components, etc., can solve problems such as variable compression difficulties, and achieve the effects of avoiding fuel wall loss, reducing intake air backflow, and reducing energy consumption

CN108798874APending Publication Date: 2018-11-13JILIN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2018-11-13

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Abstract

The invention discloses a multi-cylinder Miller cycle engine synergetic gas intake energy-saving device and a control method thereof. The device comprises a gas storage chamber, a control valve and amechanical movable valve, wherein the gas storage chamber communicates with an inlet valve through a gas inlet branch pipe and is used for storing high-pressure low-temperature combustible mixed gas of a combustion chamber; the control valve is arranged in the gas inlet branch pipe and used for controlling opening and closing of a channel; the mechanical movable valve has the one-way communicatingfunction; gas can get into the combustion chamber from a main gas inlet pipeline, and gas in the combustion chamber cannot return. When the control valve is turned on, the high-pressure low-temperature combustible mixed gas gets into the combustion chamber and is combusted with intake gas of a gas inlet main pipe to do work. The engine synergetic gas intake device provided by the invention can temporarily store the high-pressure low-temperature combustible mixed gas discharged from a Miller engine during compression travel and supplies gas together with the inlet valve when a next cylinder takes in the gas. Meanwhile, according to the turn-on time of the control valve, the whole engine is equivalent to a variable compression ratio engine, and the comprehensive performance of the engine isimproved.
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Description

technical field

[0001] The invention relates to the field of engines, in particular to an energy-saving device that utilizes a high-pressure, low-temperature combustible mixture to realize coordinated air intake of an engine. Background technique

[0002] The Miller cycle is generally an engine cycle in which the expansion ratio is greater than the compression ratio by delaying the closing of the intake valve. During the Miller cycle, the intake valve is kept open until the beginning of the compression process, so that part of the intake air is returned to the intake port, reducing the intake charge. On the one hand, the effective compression stroke is reduced, and the effective compression stroke of the engine is smaller than the effective expansion stroke without changing the expansion stroke, that is, the separation of compression ratio and expansion ratio is realized, which can not only suppress engine knocking but also reduce carbon oxidation On the other hand, at part...

Examples

Embodiment Construction

[0027] The present invention will be further described in detail below in conjunction with the accompanying drawings, so that those skilled in the art can implement it with reference to the description.

[0028] like figure 1 As shown, the control valve 104 communicates with the combustion chamber 101 and the gas storage chamber 105 in the branch passage 103 of the intake pipe, and is used to control the two-way flow of the high-pressure and low-temperature combustible mixture. The mechanical movable valve 107 has a one-way conduction capability, and the gas can enter during the intake, but when the gas discharged from the compression stroke enters the intake pipe and flows back, the gas closes the main intake pipe by pressing the mechanical movable valve 107, and most of the gas passes through The control valve 104 enters an air reservoir 105 . When the next intake stroke starts, the control valve 104 is opened, and the high-pressure, low-temperature combustible mixture in ...