Compact laser ignition device for combustion engine

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	Compact laser ignition device for combustion engine
其他题名	Compact laser ignition device for combustion engine
	GHOSH, CHUNI L; WANG, QING; XU, BING; VAN LEEUWEN, ROBERT
	2017-02-21
专利权人	PRINCETON OPTRONICS INC
公开日期	2017-02-21
授权国家	美国
专利类型	授权发明
摘要	A high efficiency optical ignition device is provided in a two-part compact and robust package to be mounted directly on an internal combustion engine chamber. The ignition device ignites a combustion fuel with a high intensity plasma generated by a high power laser beam from a solid state laser operable in Q-switched, or non-Q-switched mode for producing short or long pulses, respectively. Multiple pulses are generated, and duration and frequency of the laser beam pulses are controlled by controlling an optical pump module to pump the solid state laser. The optical pump module comprises a semiconductor laser, preferably a VCSEL device. One or more laser beams are precisely directed, each one to a desired location anywhere within the combustion chamber for more efficient and near complete burning of the combustion fuel. The robust packaging is well suited to withstand mechanical and thermal stresses of the internal combustion engine.
其他摘要	高效率光学点火装置设置在两部分紧凑且坚固的包装中，以直接安装在内燃机室上。点火装置点燃具有高强度等离子体的燃烧燃料，该高强度等离子体由来自固态激光器的高功率激光束产生，该固态激光器可操作在Q开关模式或非Q开关模式，以分别产生短脉冲或长脉冲。产生多个脉冲，并且通过控制光泵模块来泵浦固态激光器来控制激光束脉冲的持续时间和频率。光泵模块包括半导体激光器，优选VCSEL器件。一个或多个激光束被精确地引导到燃烧室内的任何位置，每个激光束被引导到期望的位置，用于燃烧燃料的更有效和接近完全的燃烧。坚固的包装非常适合于承受内燃机的机械和热应力。
主权项	A laser ignition device comprising: a housing having a lower and an upper section placed in good thermal contact by bonding, wherein the exterior of the lower section comprises a threaded region to be attached to a correspondingly threaded cavity of an internal combustion engine wall, said lower and upper sections further including respective interior cavities, said cavities align to provide a contiguous hollow space, and a sealed window located at one extreme end of the lower section opposite from the upper section; a cooling apparatus surrounding the housing and in thermal contact with the housing; an optical pump module mounted on a first submount, said submount placed in thermal contact with a heat sink and a first section of the interior wall of the housing, such that the optical pump module is in thermal contact with the cooling apparatus; a solid state laser mounted on a second submount, said solid state laser including at least one solid gain medium disposed between a high reflectivity coating and a low reflectivity coating deposited on opposite ends of the gain medium with the low reflectivity coating end positioned to face the window, wherein said second submount is positioned in thermal contact with the heat sink and a second section of the interior wall of the housing, such that the solid state laser is in thermal contact with the cooling apparatus; at least two beam shaping elements, wherein at least a first beam shaping element is positioned between the optical pump module and the solid state laser, and at least a second beam shaping element is positioned between the solid state laser and the window, wherein upon operating the pump module, a laser beam generated in the solid state laser is directed to a desired location to ignite a combustion fuel in the internal combustion engine.
申请日期	2016-05-27
专利号	US9574541
专利状态	授权
申请号	US15/166296
公开（公告）号	US9574541
IPC 分类号	F02P23/00 \| F02P23/04
专利代理人	-
代理机构	-
文献类型	专利
条目标识符	http://ir.opt.ac.cn/handle/181661/46351
专题	半导体激光器专利数据库
作者单位	PRINCETON OPTRONICS INC
推荐引用方式 GB/T 7714	GHOSH, CHUNI L,WANG, QING,XU, BING,et al. Compact laser ignition device for combustion engine. US9574541[P]. 2017-02-21.