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A single-piston hydraulic free-piston engine with stepless speed regulation

A piston engine and stepless speed regulation technology, applied in the field of hybrid power, can solve the problems of cumbersome conversion, reduced efficiency of hydraulic free piston engine, complex mechanism, etc., and achieve the effects of compact overall structure, shortened energy transmission chain, and simplified structure

Active Publication Date: 2017-05-03
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among the many inventions about hydraulic free-piston engines nowadays, in the process of energy conversion, the mechanism is complicated, the conversion is cumbersome, and there are many losses, which seriously reduces the efficiency of hydraulic free-piston engines.

Method used

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  • A single-piston hydraulic free-piston engine with stepless speed regulation
  • A single-piston hydraulic free-piston engine with stepless speed regulation
  • A single-piston hydraulic free-piston engine with stepless speed regulation

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Experimental program
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Effect test

Embodiment 1

[0026] The hydraulic free piston engine includes: a high pressure accumulator 1, a low pressure accumulator 16, a constant power transformer 2, a control valve A3, a control valve B13, a cylinder block 6, a fuel injector 9 and a piston assembly. Wherein the cylinder block 6 is the body, the high-pressure accumulator 1 and the low-pressure accumulator 16 are energy storage devices, and the piston assembly includes a cylinder piston 10, a piston connecting rod 12 and a pump piston 14 connected in sequence. The constant power transformer 2 has three ports, namely port A, port B and port C.

[0027] Its overall connection relationship is as follows figure 1 As shown, the cylinder block 6 is a hollow cylindrical structure, providing a mounting cavity for the piston assembly. The cylinder block 6 can be divided into three sections in the axial direction according to different diameters. From left to right, there are cylindrical section A, cylindrical section B and cylindrical secti...

Embodiment 2

[0036] The hydraulic free piston engine includes: a high pressure accumulator 1, a low pressure accumulator 16, a constant power transformer 2, a control valve C18, a cylinder block 6, an injector 9 and a piston assembly. Wherein the cylinder block 6 is the body, the high-pressure accumulator 1 and the low-pressure accumulator 16 are energy storage devices, and the piston assembly includes a cylinder piston 10, a piston connecting rod 12 and a pump piston 14 connected in sequence. The constant power transformer 2 has three ports, namely port A, port B and port C.

[0037] Its overall connection relationship is as follows figure 2 As shown, the cylinder block 6 is a hollow cylindrical structure, providing a mounting cavity for the piston assembly. The cylinder block 6 can be divided into three sections in the axial direction according to different diameters. From left to right, there are cylindrical section A, cylindrical section B and cylindrical section C, wherein the diame...

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Abstract

The invention discloses a stepless speed regulating single-piston type hydraulic free piston engine and belongs to the technical field of hybrid power. The hydraulic free piston engine comprises a high-voltage energy accumulator, a low-voltage energy accumulator, a constant power transformer, a control valve, an air cylinder body, an oil atomizer and a piston component. The air cylinder body provides a mounting cavity of the piston component, and accordingly a piston oil cavity, a starting oil cavity and a scavenging chamber are formed. A port A of the constant power transformer is connected with the high-voltage energy accumulator. A port C is connected with the low-voltage energy accumulator. A port B is communicated with the piston oil cavity. The control valve is arranged, so that when the hydraulic free piston engine is in a starting working condition, the high-voltage energy accumulator is communicated with the starting oil cavity. In a first stroke and a second stroke, the low-voltage energy accumulator is communicated with the starting oil cavity. The engine generates pressure changing through the constant power transformer, so that hydraulic energy and fuel burning heat energy are directly converted, and meanwhile by changing the port pressure of the constant power transformer, stepless speed regulating of the free piston engine can be achieved.

Description

technical field [0001] The invention relates to a free-piston engine, in particular to a single-piston hydraulic free-piston engine with stepless speed regulation, and belongs to the technical field of hybrid power. [0002] technical background [0003] As the global energy crisis and environmental degradation become increasingly apparent, the requirements for energy-saving and environmental protection performance of engines are also increasing. At the same time, with the rapid development and application of the internal combustion engine industry, people have higher and higher requirements for the structure, efficiency, power density and pollution emission of the power plant. On the one hand, people are committed to the improvement and perfection of traditional engines, and on the other hand, they are diligently seeking new power devices. The hydraulic free piston engine is a new type of special internal combustion engine developed under this background. The hydraulic fre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02B71/00F15B1/02
Inventor 吴维娄伟鹏苑士华胡纪滨
Owner BEIJING INSTITUTE OF TECHNOLOGYGY