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Free piston internal combustion generation power system with adjustable compression ratio

A power system, compression ratio technology, applied in engine control, machine/engine, mechanical equipment, etc., can solve problems such as uncontrollable, variable compression ratio, unstable system operation, etc., to achieve high power density and fuel adaptability Good, high energy conversion efficiency

Active Publication Date: 2015-07-29
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the compression ratio of the free-piston internal combustion generator in the prior art is variable but uncontrollable, resulting in unstable operation of the system

Method used

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  • Free piston internal combustion generation power system with adjustable compression ratio
  • Free piston internal combustion generation power system with adjustable compression ratio

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Effect test

Embodiment 1

[0023] Free piston internal combustion power generation system with adjustable compression ratio, including connecting rod 1, limit mechanism, rack 5, gear 6, drive motor 7, control system ECU8, such as figure 1 shown;

[0024] The limit mechanism includes: position adjustment box 2, positioning rod 3, spring 4;

[0025] The limit mechanism is placed between the cylinder and the motor; the connecting rod 1 passes through the position adjustment box 2 and is fixedly connected with the pistons on both sides and the motor mover respectively; the positioning rod 3 is fixed on the connecting rod 1, and is located in the position adjustment box when the system is stopped. 2 in the middle; the spring 4 is nested on the connecting rod 1, and is symmetrically installed on both sides of the positioning rod 3; a rack 5 is arranged on the outside of the position adjustment box 2; the side of the position adjustment box 2 with the rack 5 is connected to the gear 6; The gear 6 is connected...

Embodiment 2

[0032] Free piston internal combustion power generation system with adjustable compression ratio, including connecting rod 1, limit mechanism, rack 5, gear 6, drive motor 7, control system ECU8, such as figure 2 shown;

[0033] The limit mechanism includes: position adjustment box 2, positioning rod 3, hydraulic damper 9;

[0034] The limit mechanism is placed between the cylinder and the motor; the connecting rod 1 passes through the position adjustment box 2 and is fixedly connected with the pistons on both sides and the motor mover respectively; the positioning rod 3 is fixed on the connecting rod 1, and is located in the position adjustment box when the system is stopped. 2 in the middle; the hydraulic damper 9 is nested on the connecting rod 1, and is symmetrically installed on both sides of the positioning rod 3; a rack 5 is arranged on the outside of the position adjustment box 2; the side of the position adjustment box 2 with the rack 5 and the gear 6 connection; the...

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Abstract

The invention relates to a free piston internal combustion generation power system with an adjustable compression ratio, and belongs to the technical field of power machinery. A position regulating box is adopted to control the position of a rotor stroke middle point, so as to adjust the compression ratio of cylinders at the two sides. Displacement data collected by a displacement sensor are processed by an ECU (Electronic Control Unit) to be control signals, so that the closed feedback regulation of the whole system can be realized. Under an engine starting working condition, the position of a starting point can be changed by adjusting the position of a locating rod; under a system steady running working condition, the position regulating box is controlled by an ECU output signal, and the position variation is determined by the compression ratio of the cylinders at the two sides. Since the locating rod is fixedly connected with a rotor connecting rod, so that the locating rod seals springs under a state of compression at the right and left sides; under the functions of the springs at the two sides and the stress of a gear rack, the regulation of the system compression ratio is realized.

Description

technical field [0001] The invention relates to a free piston internal combustion power generation power system with adjustable compression ratio, which belongs to the technical field of power machinery. Background technique [0002] Free Piston Engine Generator (FPEG for short) is a new type of power system that has been gradually developed in the past ten years under the background of energy shortage and serious environmental pollution. It couples a free-piston internal combustion engine and a linear generator into a body, aiming to provide clean energy for hybrid vehicles. Compared with the combined power of the traditional crankshaft internal combustion engine and rotary generator, the free piston internal combustion power generation system omits the crank connecting rod mechanism, and has the advantages of simple structure, high energy conversion efficiency, multi-fuel adaptability, high energy density, relatively Many performance advantages such as low NVH and high tr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02B75/04F02D15/04
Inventor 冯慧华许洪瑜宋豫何谦益
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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