Exhaust gas storing and recirculating internal combustion engine

Abstract

An exhaust gas storing and recirculating internal combustion engine, comprising a gas cylinder, a combustion chamber, an exhaust valve, a gas inlet valve, a gas storage valve and a gas storage chamber. The gas storage valve is connected to the combustion chamber and the gas storage chamber, and is used to place the combustion chamber in communication with the gas storage chamber. The gas storage chamber is used to store exhaust gas. By means of controlling the exhaust valve, the gas inlet valve and the gas storage valve to open and close, inlet gas, exhaust gas, storage gas and stored gas can enter the gas cylinder. Thus, by means of reusing exhaust gas, fuel efficiency can be improved, and nitrogen oxides can be reduced.

Description

An exhaust gas storage and recirculation internal combustion engine Background Art

[0001] The present invention relates to an exhaust gas storage and recirculation (EGR) internal combustion engine. Existing internal combustion engines suffer from nitrogen oxide pollution and low combustion efficiency. Existing EGA systems employ external recirculation, resulting in complex mechanisms, low efficiency, and low reliability. To address these issues, an internal combustion engine with EGR is proposed. Summary of the Invention

[0002] The solution adopted by the present invention is: an exhaust gas storage and recirculation system, which includes a cylinder, an intake valve, an exhaust valve, an air storage valve, an air storage chamber, and a combustion chamber. The air storage chamber is used for storing exhaust gas.

[0003] The workflow is as follows:

[0004] At the beginning of the cycle, the piston is at top dead center, the intake valve opens, and the piston's downward motion creates negative pressure, drawing air in. When the piston reaches position a, the intake valve closes, the reservoir valve opens, and air in the reservoir chamber is drawn into the cylinder. When the piston reaches bottom dead center, the reservoir valve closes, completing the cylinder's intake stroke.

[0005] At this time, the cylinder contains a mixture of fresh air and exhaust gas.

[0006] 2. After completing the intake stroke, the piston moves upward, and the injector sprays fuel before the piston reaches top dead center. The spark plug ignites when the piston is near top dead center.

[0007] 3. After the piston is ignited, the gas expands and does work, and the piston moves toward its bottom dead center. The work is complete when the piston reaches its bottom dead center.

[0008] 4. After the piston completes its work, it moves toward top dead center. The exhaust valve opens to discharge some of the exhaust gas. When the piston reaches point b (see figure), the exhaust valve closes, completing the exhaust process. The air storage valve opens, and the piston continues its upward movement, compressing the remaining exhaust gas into the air storage chamber. When the piston reaches top dead center, the air storage valve closes, completing the air storage process.

[0009] This process can also be done by storing gas first and then exhausting it. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 is a schematic diagram of the exhaust valve. This type of internal combustion engine has three types of valves: intake valve, exhaust valve, and storage valve.

[0011] Fig. 2 is a schematic diagram of the main components of this internal combustion engine, including the air storage chamber. For convenience of viewing, the exhaust valve, fuel injector, and other parts are omitted in the figure.

[0012] Figure 3 is a schematic diagram of two cylinders sharing one air storage chamber, and its working principle is the same as that of one cylinder. The air storage chamber can be shared by multiple cylinders and its working principle is the same as that of one cylinder.

[0013] FIG4 is a schematic diagram of the start of the intake stroke.

[0014] Figure 5 is a schematic diagram of the piston reaching position a. Position a is a position between the top dead center and the bottom dead center.

[0015] FIG6 is a schematic diagram of the piston reaching the bottom dead center.

[0016] Figure 7 is a schematic diagram of the piston reaching position b. Position b is a position between the bottom dead center and the top dead center.

[0017] The exhaust gas storage and recirculation engine of the present invention has much higher fuel economy, less nitrogen oxide generation and higher reliability than the existing EGA system.

Claims

1. [Corrected according to Rule 26 on 30.12.2023] An internal combustion engine with an exhaust gas recirculation storage cycle, comprising a cylinder, an exhaust valve, an intake valve, a storage valve, a combustion chamber, and a storage chamber for storing exhaust gas, characterized in that The air storage valve is connected to the combustion chamber, and the air storage valve is also connected to the air storage chamber. As shown in Figure 2.

2. [Corrected according to Rule 26 on 30.12.2023] For the exhaust gas storage and recirculation internal combustion engine according to claim 1, there are multiple independent cylinders, exhaust valves, intake valves, storage valves, combustion chambers and a storage chamber, characterized in that The air storage valve is connected to the air storage chamber, and the air storage valve is also connected to the air storage chamber. They share one air storage chamber. As shown in Figure 3.

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