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

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.

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...

AI Technical Summary

Problems solved by technology

However, under the existing technical conditions, the engine is limited by the structure, and the volume of the combustion chamber and the working volume of the cylinder are fixed, so it is difficult to achieve variable compression.

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