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Self-priming hydraulic free-piston linear engine

An engine and self-priming technology, which is applied in the field of power devices and piston engines, can solve the problems that the system does not have self-priming oil function, the engine fuel utilization rate is poor, and the complexity of the system increases, so as to improve efficiency and reliability, Good transient response, good economical effect

Active Publication Date: 2015-07-08
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In these inventions, the entire system does not have a self-priming oil function, and oil is supplied to the compression chamber through a low-pressure accumulator or an oil pump during the compression stroke, which increases the complexity of the system and makes the overall fuel utilization of the engine poor. , poor economy

Method used

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  • Self-priming hydraulic free-piston linear engine
  • Self-priming hydraulic free-piston linear engine
  • Self-priming hydraulic free-piston linear engine

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Embodiment Construction

[0026] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0027] This embodiment provides a hydraulic free-piston linear engine with self-priming ability, which can solve the problems of low efficiency, poor fuel rate and complex structure of the existing linear engine.

[0028] The linear engine includes: a cylinder block 2, a piston assembly, a low pressure accumulator 11, a high pressure accumulator 12, a pressure oil tank 13, a pneumatic control valve 14 and a fuel injector 20. Wherein the cylinder body 2 is the body, the high-pressure accumulator 12 and the low-pressure accumulator 11 are energy storage devices, and the piston assembly includes a cylinder piston 3 , a pump piston 6 and a compression piston 18 .

[0029] Its overall connection relationship is as follows figure 1 As shown: the cylinder block 2 is a hollow cylindrical structure, providing a mounting cavity for the piston assembly. The cylinde...

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Abstract

The invention discloses a self-priming hydraulic free-piston linear engine. Pressure difference produced by a piston moving at high speed can be utilized to suck oil into a pump cavity, an independent oil supply pump can be omitted, accordingly energy loss is reduced, and the efficiency of the engine is improved. The linear engine comprises an internal combustion engine portion and a hydraulic portion, wherein the internal combustion engine portion applies a working principle of a two-stroke diesel engine and adopts a uniflow scavenging mode. The hydraulic portion provides energy for a compression stroke and meanwhile stores energy produced by an acting stroke in energy accumulators. The self-priming hydraulic free-piston linear engine comprises an air cylinder body, a piston module, a scavenging chamber, a low-pressure energy accumulator, a high-pressure energy accumulator, a pressure oil tank, a pneumatic control valve and an oil sprayer. The piston module comprises an air cylinder piston, a pump piston and a compression piston which are fixedly connected together. The piston module performs circulating reciprocating linear motion, and the pump piston suck low-pressure oil through a low-pressure oil way in the compression stroke. In an expansion stroke, the compression piston converts the low-pressure oil into high-pressure oil to complete power output.

Description

technical field [0001] The invention relates to a power device, in particular to a piston engine, and belongs to the technical field of hybrid power. Background technique [0002] 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. Therefore, all countries in the world are diligently pursuing new technologies and new principles, striving to develop new engines with high efficiency, low pollution, reliability and good technical inheritance, so as to adapt to contemporary material and technical conditions. The hydraulic free piston engine is a new type of special internal combustion engine developed under this background. The hydraulic free piston engine is a synthesis of modern hydraulic technology, microelectronics technology, control technology and internal combustion engine technology. This new type of power...

Claims

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Application Information

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