Advanced Hot Surface Ignition Systems for High Pressure Natural Gas (HPNG) Engines

该CRD项目将调查和解决位于卑诗省温哥华的Westport Innovation Inc.正在开发的高压天然气(HPNG)直喷发动机热表面点火系统(HSIS)的设计和材料限制。该项目的长期工程目标是向Westport提供研究支持和设计帮助，以开发一种成本可接受的HSIS，它将在HPNG发动机上可靠地运行10,000小时。基本的工程科学目标包括在天然气内燃机复杂而动态的环境中发展导电陶瓷加热器的科学。该计划的三个主要目标是：(1)设计、制造和评估基于MoSi2的实验性辉光环(GR)系统，并开发其退化过程的定量模型；(2)基于商用辉光塞(GP)研究用于HPNG-DI的先进的基于Si3N4的HSIS；(3)开发、加工和研究用于(I)基于MoSi2 GR的新型HSIS；(Ii)基于Si3N4的GP的表面改性技术。我们将在基础材料科学和工程以及工程设计层面研究和应对一系列材料和设计相关挑战，包括对GR、GP和火花塞导电陶瓷的损伤研究和预防(腐蚀、侵蚀、断裂、电场相关损伤)；开发陶瓷-金属系统以提高GR和GP的机械性能和可靠性(包括界面反应；残余应力最小化；元素重新分布和表面腐蚀最小化)；开发和评估GR和GP的被动(防腐)和活性(催化)涂层的性能，以及材料和器件性能的数学建模和预测。

This CRD program will investigate and address the limitations of the design and materials for Hot Surface Ignition systems (HSIS) in High-Pressure Natural Gas (HPNG) Direct Injection engines under development by Westport Innovations Inc, of Vancouver, BC. The long-term engineering goal of this project is to provide research support and design assistance to Westport towards development of an acceptable-cost HSIS which will reliably perform for >10,000 hrs in HPNG engine. The fundamental engineering science goals include advancement of the science of electrically conductive ceramic heaters in the complex and dynamic environment of the NG combustion engine. The three principal program objectives are: (1) Design, fabricate and evaluate MoSi2-based experimental Glow Ring (GR) systems and develop quantitative models of their deterioration process; (2) Investigate advanced Si3N4-based HSIS for HPNG-DI based on commercially available Glow Plug (GP); (3) Develop, process and investigate surface modification technologies for (i) the new HSIS based on MoSi2 GR; (ii) Si3N4-based GP. We will research and address a host of materials and design related challenges at the fundamental materials science & engineering as well as at engineering design levels, including damage study and prevention to electrically conductive ceramics for GR, GP, and Spark Plug (corrosion, erosion, fracture, electric-field related damage); development of ceramic-metal systems for improved mechanical performance and reliability of GR and GP (including interfacial reactions; residual stress minimization; elements redistribution and surface corrosion minimisation); development and assessment of performance of passive (corrosion protection) and active (catalytic) coatings for GR and GP, as well as mathematical modeling and prediction of the materials and devices performance.