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以往的ＣＡＤ技术，都是以数值计算为主，结合计算机绘图，这只适用于处理数值信息，用以解决数值模型（如数学模型）描述的问题。而燃烧系统的设计需加入专家经验，并接受试验结果的约束，难以用数值模型表达，必须用新的软件技术来实现。本文即针对应用射流燃烧技术的主要改动件——气缸盖的设计、制图问题，在计算机辅助设计中加入了人类专家的参与，是专家经验和数值计算程序库的集成，是智能化的软件系统，应用该系统可以自动修改汽油机射流燃烧系统的气缸盖图形
In the past, CAD technology was mainly based on numerical calculation and combined with computer graphics, which was only used to deal with the numerical information to solve the problems described by numerical model (such as mathematical model). However, the design of the combustion system needs to add expert experience, and accept the constraints of the test results, it is difficult to use numerical model to express, we must use new software technology to achieve. This article aims at the application of jet combustion technology, the main changes - cylinder head design, mapping problems in the computer-aided design to join the participation of human experts, is the integration of expert experience and numerical library, is an intelligent software system , The application of the system can automatically modify the gasoline cylinder jet combustion system cylinder head graphics