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Free Piston Internal Combustion Electric 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: 2017-12-22
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 Electric Power System with Adjustable Compression Ratio
  • Free Piston Internal Combustion Electric Power System with Adjustable Compression Ratio

Examples

Experimental program
Comparison scheme
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 power generation power system with adjustable compression ratio, which belongs to the technical field of power machinery. The present invention uses a position adjustment box to control the position of the middle point of the mover's stroke, so as to adjust the compression ratio of the cylinders on both sides. The displacement data collected by the displacement sensor is processed by the ECU as a control signal to realize the closed feedback adjustment of the entire system. In this design, the starting position can be changed by adjusting the position of the positioning rod in the starting condition of the engine. In the stable operating condition of the system, the position adjustment box is controlled by the output signal of the ECU, and the position change is determined by the compression ratio of the cylinders on both sides. Since the positioning rod is fixedly connected with the mover connecting rod, the left and right sides of the positioning rod are packed with compressed springs, and under the action of the stress of the springs on both sides and the rack and pinion, the adjustment 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 Patents(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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