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Split exhaust two-stroke engine

An engine and two-stroke technology, which is applied in the direction of engine components, combustion engines, machines/engines, etc., can solve the problems of low utilization rate of engine exhaust energy and affect engine efficiency, and achieve the effect of reducing irreversible losses and improving efficiency

Inactive Publication Date: 2013-03-27
ZEROQ SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Existing two-stroke engine comprises an exhaust scavenging port, and the exhaust scavenging port communicates with the turbine through the exhaust channel, and the turbine outputs power to the impeller compressor. Since the engine of this structure cannot effectively utilize the gas distribution when the scavenging port is just opened Instantaneous high-pressure exhaust, so the utilization rate of engine exhaust energy is low, which affects the efficiency of the engine, so it is necessary to invent a new type of two-stroke engine

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Such as figure 1 The shown split exhaust two-stroke engine includes an opposed-piston two-stroke engine 1, and the scavenging exhaust port of the opposed-piston two-stroke engine 1 is composed of a high-pressure scavenging exhaust port 2 and a low-pressure scavenging exhaust port. 3 composition.

[0044] The working process of this embodiment is as follows: the opposed-piston two-stroke engine 1 first opens the high-pressure scavenging exhaust port 2 during the scavenging exhaust process, and the high-pressure gas is discharged from the high-pressure scavenging exhaust port 2, Then open the low-pressure scavenging air exhaust port 3, and the low-pressure gas is discharged from the low-pressure scavenging air exhaust port 3.

Embodiment 2

[0046] Such as figure 2 The difference between the shown split exhaust two-stroke engine and Embodiment 1 is that the high-pressure scavenging exhaust port 2 communicates with the high-pressure turbine 5 through the high-pressure exhaust passage 4, and the low-pressure scavenging exhaust port 3 The low-pressure exhaust passage 6 communicates with the low-pressure turbine 7, and the high-pressure turbine 5 and the low-pressure turbine 7 jointly output power to the impeller compressor 8 arranged on the intake passage of the split-exhaust two-stroke engine. An exhaust check valve 9 is provided at the high-pressure scavenging exhaust port 2 .

[0047] During specific implementation, optionally, the high-pressure turbine 5 and the low-pressure turbine 7 independently output power to the impeller compressor 8 arranged on the intake port of the split-exhaust two-stroke engine.

Embodiment 3

[0049] Such as image 3The difference between the shown split exhaust two-stroke engine and Embodiment 1 is that the high-pressure scavenging exhaust port 2 communicates with the low-pressure exhaust channel 6 through the high-pressure exhaust channel 4, and the low-pressure scavenging exhaust The port 3 communicates with the low-pressure turbine 7 through the low-pressure exhaust passage 6, the gas ejection direction of the high-pressure exhaust passage 4 is generally directed to the gas flow direction in the low-pressure exhaust passage 6, and the low-pressure turbine 7 is arranged on the The impeller compressor 8 on the air inlet of the split exhaust two-stroke engine outputs power.

[0050] An exhaust check valve 9 is provided at the high-pressure scavenging exhaust port 2 . The opposed-piston two-stroke engine 1 is a compression ignition engine, and a fuel nozzle 10 and a spark plug 11 are arranged on the cylinder liner of the opposed-piston two-stroke engine 1 .

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Abstract

The invention discloses a split exhaust two-stroke engine. The split exhaust two-stroke engine comprises an opposed-piston two-stroke engine, wherein an exhaust port of the opposed-piston two-stroke engine is composed of a high pressure scavenging exhaust port and a low pressure scavenging exhaust port. According to the split exhaust two-stroke engine, the scavenging exhaust port of the split exhaust two-stroke engine is set to be the high pressure scavenging exhaust port and the low pressure scavenging exhaust port, or an exhaust scavenging door is set to be a high pressure exhaust scavenging door and a low pressure exhaust scavenging door in a direct current scavenging two-stroke engine with the exhaust scavenging door arranged on a cylinder cover, so that high pressure gas and low pressure gas in exhausted gas respectively enter different channels, irreversible loss of a process is reduced, then high pressure exhausted gas and low pressure exhausted gas are respectively utilized, and the aim of improving efficiency of the engine is achieved.

Description

technical field [0001] The invention relates to the field of thermal energy and power, in particular to a two-stroke engine. Background technique [0002] Existing two-stroke engines include an exhaust scavenging port, which communicates with the turbine through the exhaust passage, and the turbine outputs power to the impeller compressor. The engine of this structure cannot effectively utilize the gas when the gas distribution scavenging port is just opened. Instantaneous high-pressure exhaust, so the exhaust energy utilization rate of the engine is low, thereby affecting the efficiency of the engine, so it is necessary to invent a new two-stroke engine. Contents of the invention [0003] In order to solve the above problems, the technical scheme proposed by the present invention is as follows: [0004] A split-exhaust two-stroke engine includes an opposed-piston two-stroke engine, and the scavenging exhaust port of the opposed-piston two-stroke engine is composed of a h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02B25/04F02B37/00F02B37/013F02B75/28F02B75/02F02F1/22F01L13/00F01N13/00
CPCY02T10/146Y02T10/144Y02T10/12
Inventor 靳北彪
Owner ZEROQ SCI & TECH