Device and method for ignition through dual-mode lasers in target portion breakdown manner

A technology of ignition device and laser target, which is applied in the direction of engine ignition, engine components, machine/engine, etc., to achieve the effect of saving fuel, improving ignition speed, and reducing the difficulty of ignition adjustment

Active Publication Date: 2015-12-09
INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention provides an effective solution to the problems existing in the existing target breakdown laser ignition device and method

Method used

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  • Device and method for ignition through dual-mode lasers in target portion breakdown manner

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A semiconductor continuous laser with a wavelength of 808nm is used, and its output 45W laser is used to preheat the target and the mixed gas. Subsequently, a 1064nm nanosecond laser was used to break down the target to generate plasma spark ignition with a repetition frequency of 10Hz and a single pulse energy of 200mJ.

[0029] The laser ignition operation according to this embodiment is completed under the above conditions, and the ignition of the mixture of methane and air is realized.

Embodiment 2

[0031] Nd:YAG all-solid-state continuous laser with a wavelength of 1064nm is used, and its output 60W laser is used to preheat the target and the mixed gas. A picosecond laser is used to break down the target, with a wavelength of 1064 nm, a repetition rate of 10 kHz, and a single pulse energy of 0.5 mJ.

[0032] The laser ignition operation according to this embodiment is completed under the above conditions, and the ignition of the mixture of methane and air is realized.

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Abstract

The invention provides a device and method for ignition by plasma sparks generated through continuous and pulsed dual-mode lasers in a target portion breakdown manner. The device is mainly provided with a pulsed laser transmitting end, a continuous laser transmitting end, a fuel injection device, a target portion, a combustion chamber, a cylinder cover, a piston and the like. The laser transmitting end does not stretch into the combustion chamber. According to the device and method for ignition through the continuous and pulsed dual-mode lasers in the target portion breakdown manner, the plasma sparks can always be reliably generated to ignite a fuel-air mixture in the combustion chamber; and the ignition speed can be effectively increased, the ignition adjusting difficulty is lowered, ignition reliability is improved, the combustion area is increased, combustion efficiency can be improved, and fuel can be saved.

Description

technical field [0001] The invention belongs to a laser ignition device and method, in particular to a device and method for ignition by using continuous and pulsed dual-mode lasers to generate plasma sparks in a target breakdown manner. Background technique [0002] The laser ignition device is a device used for internal ignition of the engine. It mainly involves two ignition methods, namely, the target breakdown ignition method and the gas breakdown ignition method. Among them, the working principle of the target breakdown ignition method is to input the pulsed laser with high peak power to the solid target set in the combustion chamber of the engine. When the laser power density exceeds the breakdown threshold of the solid target, plasma sparks will be generated. The spark ignites the fuel-air mixture rapidly in a manner similar to a conventional electric spark. Laser ignition devices, which use laser light to ignite the fuel-air mixture in the combustion chamber, are at...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02P23/04
Inventor 于海娟林学春高文焱张志研张玲邹淑珍王奕博陈寒
Owner INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
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