Two-stroke high expansion ratio free piston internal combustion engine generator

An internal combustion generator, piston engine technology, applied in free piston engines, pistons, engine components, etc., can solve the problems of limiting thermal efficiency, unable to ensure effective ventilation, etc., and achieve the effect of improving thermal efficiency, compact structure, and high ventilation efficiency.

Inactive Publication Date: 2020-10-30
SHANDONG JIAOTONG UNIV
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  • Summary
  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For traditional two-stroke engines, the position of the scavenging port is fixed, and the expansion ratio is equal to the compression ratio, which limits the further improvement of thermal efficiency
If the intake and exhaust valves are arranged on the cylinder head of the two-stroke engine at the same time, not only the effective ventilation cannot be guaranteed, but also the intake booster device needs to be installed separately

Method used

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  • Two-stroke high expansion ratio free piston internal combustion engine generator

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Embodiment 1

[0032] A two-stroke high expansion ratio free-piston internal combustion generator of the present invention mainly includes: a free-piston engine, a linear generator, and a connecting rod 8 .

[0033] The free piston engine includes: exhaust valve controller 1, fuel injector 2, exhaust valve 3, intake valve 4, intake valve gasket 5, piston 6, one-way intake valve 7, intake valve spring 11, Intake valve damping 12, cylinder 13;

[0034] The linear generator includes: generator secondary 9, generator primary 10;

[0035] The piston 6 is provided with a plurality of intake passages;

[0036] Connection relationship:

[0037] A fuel injector 2 is arranged at the center of the top of the cylinder 13, and multiple exhaust passages are opened around it. The exhaust valve 3 is installed on the exhaust passage, and the piston 6 is installed inside the cylinder 13, and it is ensured that the piston 6 is always inside the cylinder 13 during operation. . The side surface of the piston...

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Abstract

The invention relates to a two-stroke high expansion ratio free piston internal combustion engine generator, and belongs to the field of energy and power. The generator mainly includes a free piston engine, a linear generator, and a connecting rod. A plurality of air inlet channels are opened in pistons, an air inlet door is arranged on each air inlet channel, and air inlet door springs and air inlet door damping are arranged between air inlet door gaskets and the pistons. Moments of opening and closing of the air inlet doors can be optimized by adjusting the relative position of the air inletdoor gaskets and the bottom of a cylinder and damping factors of the air inlet door damping, low compression ratio and high expansion ratio can be achieved on the two-stroke free piston engine, and the circulation heat efficiency can be further improved.

Description

technical field [0001] The invention relates to an energy power engineering mechanical device, in particular to a two-stroke high expansion ratio free-piston internal combustion generator, which belongs to the field of energy power. Background technique [0002] In recent years, people have been working hard to find an internal combustion power generation device with high energy conversion efficiency. Among them, the free piston internal combustion generator is a new type of energy conversion device formed by coupling a free piston engine and a linear generator. It is directly connected with the secondary side of the linear generator to form the only moving part - the piston assembly. When the system is running, the gas in the cylinder burns and expands to do work, pushes the piston and drives the mover to move, and then generates electrical energy, and finally converts the chemical energy of the fuel directly into electrical energy through a short transmission path. It has...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02B75/02F02B71/04F02B63/04F02F3/24
CPCF02B63/041F02B71/04F02B75/02F02B2075/025F02F3/24
Inventor 李延骁杨君
Owner SHANDONG JIAOTONG UNIV
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