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Double-group element single-piston type hydraulic free piston engine

A piston engine and single-piston technology, which is applied in the field of energy and power, can solve problems such as difficulty in precise control of compression ratio, impact on engine reliability, application limitations, etc., and achieve the effect of compact structure, simple structure, and high energy conversion efficiency

Inactive Publication Date: 2009-03-04
SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is not easy to achieve precise control of the compression ratio, and it needs to rely on a complex detection and control system, which not only greatly affects the reliability of the engine operation, but also for spark ignition or compression ignition conventional internal combustion hydraulic free piston engines, The dependence of such internal combustion engines on oxygen in the air due to the need to draw air (mainly oxygen) from the atmosphere during the operation of the engine makes their application in anaerobic or hypoxic environments such as underwater or in space. very restrictive

Method used

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  • Double-group element single-piston type hydraulic free piston engine
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  • Double-group element single-piston type hydraulic free piston engine

Examples

Experimental program
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Effect test

Embodiment 1

[0030] Embodiment 1: adopt the two-component single-piston hydraulic free-piston engine of catalytic ignition mode

[0031] refer to figure 1 , embodiment 1 two-component single-piston hydraulic free-piston engine comprises single-piston hydraulic free-piston engine, oxidant storage tank 1, fuel storage tank 2, oxidant control valve 27, fuel control valve 3 and electronic control unit (ECU) 28. Both the outlet port of the oxidant control valve 27 and the outlet port of the fuel control valve 3 communicate with the air inlet 5 of the power chamber of the single-piston hydraulic free-piston engine, and the inlet port of the oxidant control valve 27 communicates with the oxidant storage tank 1 is connected to the bottom end (i.e. the outlet end), the inlet port of the fuel control valve 3 is connected to the bottom end (i.e. the outlet end) of the fuel storage tank 2, the control end of the oxidant control valve 27 is connected to the control end of the fuel agent control valve 3...

Embodiment 2

[0058] Embodiment 2: adopt the two-component single-piston hydraulic free-piston engine of homogeneous ignition mode

[0059] refer to Figure 5 , Embodiment 2 Two-component single-piston hydraulic free-piston engine comprises single-piston hydraulic free-piston engine, oxidant storage tank 1, fuel storage tank 2, oxidant control valve 27, fuel control valve 3 and electronic control unit 28, so The outlet port of the oxidant control valve 27 and the outlet port of the fuel control valve 3 are all communicated with the air inlet of the single-piston hydraulic free piston engine power chamber, and the inlet port of the oxidant control valve 27 is connected with the outlet port of the oxidant storage tank 1 ( bottom end), the inlet end of the fuel control valve 3 is connected to the outlet end (bottom end) of the fuel storage tank 2, the control end of the oxidant control valve 27 and the control end of the fuel control valve 3 are respectively connected to the electric The corr...

Embodiment 3

[0068] Embodiment 3: Adopt homogeneous ignition mode and contain the two-component single-piston hydraulic free-piston engine of stroke regulating circuit

[0069] refer to Figure 6 , embodiment 3 adds a stroke adjustment loop on the basis of embodiment 2 dual-component single-piston hydraulic free-piston engine, so that the engine can work in a variable-range working mode under the control of the electronic control unit 28 to realize stroke adjust. The stroke adjustment loop includes a variable range control valve 30 and an unloading check valve 29. The control end of the variable range control valve 30 is connected to the output end of the electronic control unit 28, and the inlet port of the variable range control valve 30 is connected to the hydraulic pump chamber 14 of the engine. , the outlet end of the range control valve 30 is connected to the inlet end of the unloading check valve 29 , and the outlet end of the unloading check valve 29 is connected to the low-pressu...

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Abstract

The present invention relates to a double-component single-piston type hydraulic free-piston engine, which comprises a single-piston hydraulic free-piston engine, an oxidizer storage tank, a fuel agent storage tank, an oxidizer control valve, a fuel agent control valve and an electronic control unit; wherein, both the outlet end of the oxidizer control valve and the outlet end of the fuel agent control valve are communicated with the air inlet of the power cavity of the single-piston hydraulic free-piston engine; the inlet end of the oxidizer control valve is connected with the outlet end of the oxidizer storage tank; the inlet end of the fuel agent control valve is connected with the outlet end of the fuel agent storage tank; and the control end of the oxidizer control valve and the control end of the fuel agent control valve are respectively connected with the corresponding output ends of the electronic control unit. The double-component single-piston type hydraulic free-piston engine, which is characterized by simple structure, reliable operation, wide application range, high energy density, high power density, little moving parts, etc., can operate under various oxygen-deficient or oxygen-free environments, such as plateaus, underwater and outer space, and can realize stroke control and regenerative braking.

Description

technical field [0001] The invention relates to a dual-component single-piston hydraulic free-piston engine, in particular to a hydraulic free-piston special engine integrating a prime mover and a reciprocating hydraulic pump, which can be used for energy-autonomous walking of engineering walking machinery and field operations Machinery, self-propelled platforms, and power devices for hydraulic energy supply in anaerobic or hypoxic environments (such as space, underwater, or plateau, etc.), have a wide range of applications in hydraulic forklifts, hydraulic excavators, hydraulic pavers, and energy autonomous robots. The application prospect belongs to the field of energy and power technology. Background technique [0002] Hydraulic free piston engine, also known as prime mover reciprocating hydraulic pump, refers to a type that integrates prime mover and hydraulic pump, uses liquid (usually hydraulic oil) as the working medium, and uses liquid pressure to realize non-rigid t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02B71/00
Inventor 夏必忠汪劲松杨华勇谢海波郁鼎文张辉段广洪
Owner SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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