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Starting system of motor type free piston internal combustion power generation device

A technology of power generation device and starting system, which is applied in the field of power machinery, can solve the problems of no crank connecting rod mechanism, etc., and achieve the effects of short starting time, reduced volume and fewer parts

Inactive Publication Date: 2013-01-16
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, since the free-piston internal combustion power generation system does not have a crank-and-rod mechanism, the internal combustion engine cannot be started by accumulating the energy of the starter motor through the flywheel as in the traditional internal combustion engine. Compression ratio required for ignition of free piston internal combustion engine

Method used

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  • Starting system of motor type free piston internal combustion power generation device

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The first starting scheme: when the free piston internal combustion power generation device is not working, the piston assembly is located at the midpoint of the linear motor, the first intake valve 3, the first exhaust valve 4, the second intake valve 16 and the second exhaust valve 13 They are all in the closed state. Before starting, according to the expected compression ratio, the distance, acceleration, deceleration, and time required for the acceleration and deceleration process of the piston assembly are preset in the control program. When starting, the linear motor works in the motor mode to drive the piston assembly to move to the side of the first internal combustion engine cylinder 5 (or the second internal combustion engine cylinder 12) according to the preset setting. When the speed of the piston assembly is zero, the fuel injector of the internal combustion engine on this side The fuel is injected into the cylinder, the mixture in the cylinder is ignited an...

Embodiment 2

[0035] The second starting scheme: when the free piston internal combustion power generation device is not working, the piston assembly is located at the midpoint of the linear motor, the first intake valve 3, the first exhaust valve 4, the second intake valve 16 and the second exhaust valve 13 Both are in the closed state; when the free-piston internal combustion power generation device needs to be started, the linear motor works in the motor mode and acts on the piston assembly with a constant force, dragging the piston assembly to the first internal combustion engine cylinder 5 (or the second internal combustion engine cylinder 12) One side movement; as the gas pressure in the cylinder gradually increases, when the motor force is less than the sum of the gas pressure and friction in the cylinder, the piston assembly starts to decelerate until the speed is zero; then the motor force reverses and drags the piston The assembly moves in the opposite direction, and the piston ass...

Embodiment 3

[0037] When the free piston internal combustion power generation device is not working, the piston assembly is located at the midpoint of the linear motor, and the first intake valve 3, the first exhaust valve 4, the second intake valve 16 and the second exhaust valve 13 are all in a closed state, Before starting, according to the expected compression ratio, the distance, acceleration, deceleration, and time required for the acceleration and deceleration process of the piston assembly are preset in the control program. When starting is required, the first starting coil 7, the second starting coil 10 and the linear motor mover 9 form a starting motor, and the piston assembly is driven to the first internal combustion engine cylinder 5 (or the second internal combustion engine cylinder 12) according to the setting of the control program. One side moves, completes a process of first accelerating and then decelerating to zero, and reaches the compression ratio required for starting...

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Abstract

The invention belongs to the technical field of power machine, and in particular relates to a starting system of a motor type free piston internal combustion power generation device. The invention provides two types. The first type comprises a first free piston internal combustion engine, a second free piston internal combustion engine, a connecting rod and a linear motor, wherein the first free piston internal combustion engine, the linear motor and the second free piston internal combustion engine are sequentially connected with one another, and the whole mechanism is eudipleural. The second type is provided with a first starting coil and a second starting coil. Three starting schemes are provided according to two system structures. The first starting scheme is simple and is easy to control, and an extra linear motor mode conversion circuit is not needed; the number of parts in the second starting scheme is small, so that the starting time is short; and according to the third starting scheme, the linear motor with relatively small peak value can be matched, and the size of the whole device can be reduced. A simulation and experiment result shows that the free piston internal combustion power generation device can be quickly started within one second.

Description

technical field [0001] The invention belongs to the technical field of power machinery, and in particular relates to a starting system for a motor-type free-piston internal combustion power generation device. Background technique [0002] The free piston internal combustion power generation device is a new type of energy conversion device formed after the coupling of the free piston internal combustion engine and the linear generator. It directly connects the free piston with the linear motor mover to form the only moving part - the piston assembly. When the system is running, the gas in the cylinder burns and expands to do work, pushes the piston and drives the mover to move, and then generates electrical energy, and finally converts the chemical energy of the fuel directly into electrical energy through a short transmission path. [0003] The general structure of the existing internal combustion generators is that the reciprocating internal combustion engine is connected w...

Claims

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Application Information

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IPC IPC(8): F02B71/02
Inventor 左正兴贾博儒冯慧华许大涛宋豫
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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