A coaxial four-cylinder four-stroke free-piston generator

A generator and four-stroke technology, which is applied to free piston engines, machines/engines, mechanical equipment, etc., can solve the problems of high emission of two-stroke free-piston generators, prominent lateral force of four-stroke free-piston generators, and energy conversion efficiency Low-level problems, to achieve the effect of improving intake and exhaust efficiency, avoiding the generation of lateral force, and reducing power loss

Active Publication Date: 2022-03-18
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of low energy conversion efficiency of traditional extended-range internal combustion engines, high emission of two-stroke free-piston generators, and prominent lateral force of four-stroke free-piston generators, and propose a coaxial four-cylinder four-stroke free-piston power generator machine

Method used

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  • A coaxial four-cylinder four-stroke free-piston generator
  • A coaxial four-cylinder four-stroke free-piston generator
  • A coaxial four-cylinder four-stroke free-piston generator

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Embodiment 1

[0030] like Figure 1-9 As shown, a coaxial four-cylinder four-stroke free-piston generator is characterized in that: the four cylinders of the internal combustion engine are coaxially installed, there is no traditional internal combustion engine moving parts such as a crankshaft, and a four-stroke combustion method is adopted while reciprocating.

[0031] first as figure 1 As shown, the four-cylinder four-stroke free-piston generator of the present invention must be installed horizontally to avoid different gravitational effects in the four cylinders.

[0032] like figure 2 As shown, the two pistons inside the movable parts are the second piston 3 and the third piston 5, and there are four windows on the circular wall around each piston for the intake and exhaust of the second and third pistons, Oil supply, cooling and control etc. pass figure 2 It can also be seen that the first and second pistons and the third and fourth pistons are installed symmetrically. This insta...

Embodiment 2

[0046] The device is the same as in Embodiment 1, except that in order to illustrate another operation process of this coaxial four-cylinder four-stroke generator, specifically as Figure 10 shown.

[0047] Figure 10 To simplify the installation perspective view of the rear moving parts and fixed parts, it is shown that the third cylinder 17 and the fourth cylinder 18 reach the top dead center at the same time, and the first cylinder 13 and the second cylinder 16 reach the bottom dead center at the same time.

[0048] This patent uses a four-stroke operation mode. When the piston reaches the top dead center, it can be the end of the compression stroke and the beginning of the power stroke, or the end of the exhaust stroke and the beginning of the intake stroke. So this moment can have two kinds of situations, can be that the 3rd cylinder 17 starts power stroke, the 4th cylinder 18 starts intake stroke, also can be the 3rd cylinder 17 starts intake stroke, the 4th cylinder 18...

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Abstract

The invention relates to an energy power mechanical engineering device, in particular to a coaxial four-cylinder four-stroke free-piston generator, which belongs to the field of energy power. The purpose of the present invention is to solve the problems of low energy conversion efficiency of traditional extended-range internal combustion engines, high emission of two-stroke free-piston generators, and outstanding lateral force of existing four-stroke free-piston generators. The free-piston generator of the present invention uses a four-stroke operation mode, and the intake and exhaust process is obviously better than that of the two-stroke process, which can efficiently perform intake and exhaust, improve fuel efficiency, and effectively reduce the emission of gas pollutants; The linear motion of the piston generator reduces the number of moving parts such as the crankshaft, effectively improving the mechanical efficiency and power-to-weight ratio of the internal combustion engine; the coaxial arrangement of the four pistons on the moving parts effectively avoids the generation of lateral force.

Description

technical field [0001] The invention relates to an energy power mechanical engineering device, in particular to a coaxial four-cylinder four-stroke free-piston generator, which belongs to the field of energy power. Background technique [0002] With the continuous development of electric vehicle technology, the technology of extended-range electric vehicles has advanced rapidly, and mass-produced extended-range electric vehicles have appeared on the market. The range-extended electric vehicle has only one mode of motor drive, but it can be charged by direct plug-in, or it can use an internal combustion range extender to generate power to drive the motor and store the extra electric energy generated. Although the range extenders of mass-produced electric vehicles have different displacements, they all use the traditional internal combustion engine as the power source for energy conversion. The battery module of the range-extended electric vehicle is small, and the mileage of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02B71/04F02B63/04
Inventor 左正兴王文晓
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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