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SwRI
Beijing Representative Office News Release
SwRI's HEDGE® technology
eliminates low-speed pre-ignition in highly boosted engines
美国西南研究院开发最新HEDGE®高效稀燃汽油机技术打造高效低碳发动机
San Antonio — June 28, 2010 — Southwest Research Institute
(SwRI) has successfully demonstrated that its HEDGE® (High-Efficiency, Dilute
Gasoline Engine) technology, using cooled exhaust gas recirculation (EGR) and
advanced ignition systems, suppresses low-speed pre-ignition in turbocharged
gasoline direct-injection engines. Low-speed pre-ignition (LSPI) causes heavy
engine knock and can seriously damage engine parts or cause complete engine
failure.
美国圣安东尼奥，2010年X月X日 – 近日，
由美国西南研究院（SwRI）开发的HEDGE®高效稀燃汽油机技术的卓越成果得到成功验证。该技术采用冷却废气再循环（EGR）和先进的点火系统，抑制涡轮增压汽油直喷发动机在低速运转时预先点火。低速预点火（LSPI）会导致发动机严重爆震，造成发动机部件的严重损害，甚至使整个发动机出现故障。
The presence of low-speed pre-ignition is considered a
major impediment to automobile manufacturers' efforts to aggressively downsize
engines to reduce carbon dioxide emissions.
"This is a substantial development because it has the
potential to affect every original equipment manufacturer (OEM). We have
demonstrated that our HEDGE technology, primarily the use of cooled EGR,
successfully suppresses low-speed pre-ignition events and in a way that improves
fuel economy," said Dr. Terry Alger, manager of the Advanced Combustion and
Emissions Section in SwRI's Engine, Emissions and Vehicle Research Division.
"This problem was important enough to the automotive industry that SwRI chose to
fund the work internally through our internal research and development program,"
Alger added.
The causes of low-speed pre-ignition events are not
completely understood. They are random, infrequent occurrences that happen at
low speed and high torque, Alger said. Under these conditions, a pre-ignition
event leads to very heavy knock, which can cause catastrophic damage in only a
few engine cycles.
低速预点火被认为是汽车制造商进行发动机小型化，并且减少二氧化碳排放的主要障碍。“这项技术的开发是一个长足的发展，将会影响到每一个原始设备制造商（OEM）。我们的HEDGE™技术，主要使用冷却废气再循环（EGR），成功抑制了低速预点火，大大提高了燃油经济性。”来自SwRI发动机、排放及车辆研究所高级燃烧和排放部门的阿尔基尔博士（Dr.
Terry
Alger）说道。正是看到这个难题对于汽车制造业的困扰，SwRI决定投入资金并且展开研发计划。目前业内还没有完全理解低速预点火的原因，它们在低转速高扭矩时发生的频率是非常随机而不频繁的。阿尔基尔博士解释，在这种条件下，预点火造成非常严重的敲缸，这会导致在仅仅几个循环下发动机的灾难性破坏。
Cooled EGR and its supporting technologies for high
efficiency are being investigated in SwRI's
HEDGE II consortium. HEDGE II is in
the second year of a cooperative research consortium aimed at developing a
high-efficiency gasoline engine for both light-duty automotive, medium-duty and
heavy-duty markets. This four-year program expands on earlier efforts to improve
gasoline engine technology for future emissions and fuel economy requirements.
The first HEDGE consortium focused on high levels of EGR
combined with supporting technologies such as advanced ignition systems and
advanced boosting technology to develop strategies for high efficiency.
冷却EGR和配套的高效率技术目前正在SwRI发起的HEDGE
II联盟中进行验证和调查。HEDGE II计划已经进入第二年，旨在为轻型、中型及重型汽车市场，开发高效汽油发动机。联盟早期主要进行了对大量和EGR配套的先进的点火系统，以及增压技术的重点研究，以开发实现高效率的技术策略。这项四年的联盟计划，为改善汽油发动机技术，应对将来的排放和燃油经济性的要求，提前做好了准备。
"What we were able to accomplish through the first HEDGE
consortium showed we could significantly improve gasoline engine performance and
efficiency," Alger said. "Not only were we able to decrease fuel consumption,
but we were also able to lower emissions significantly." SwRI engineers have
been working on low-speed pre-ignition suppression internally for the past year.
"It is another significant step forward in developing an
aggressive knock mitigation strategy," Alger said. "Our internally funded work
has also looked into the fuel's effect on pre-ignition as well as potential non-EGR
hardware and control solutions, but our first goal was to show how our cooled
EGR technology suppresses the phenomenon."
SwRI also is working on examining lubricant effects on
LSPI and expects to begin a separate consortium on the topic to develop new
lubricants and lubricant testing methods.
HEDGE II consortium members represent the transportation
industry in Asia, Europe and the United States. They are from a broad industry
cross section, including light, heavy-duty and off-road engine manufacturers,
component suppliers and oil and fuel companies. There are 23 members of the
consortium, including most major automotive manufacturers.
"We will continue to develop these
concepts that were initiated in the first HEDGE program and
further develop the supporting technologies to implement this strategy in modern
engines," Alger said. "We are already seeing concepts developed in HEDGE I enter
production."
As an independent R&D laboratory, SwRI has extensive
experience in managing consortia. Since 1991, a separate Clean Diesel consortium
has conducted research in low-emission diesel engines with as many as 46 member
companies worldwide.
HEDGE
II联盟成员遍及亚洲、欧洲和美国的汽车和交通行业。目前有23位成员，其中包括最主要的汽车制造商。同时，SwRI还发起了一个旨在开发低排放柴油发动机的清洁柴油联盟，拥有46个会员公司的全球研究。作为一个独立的研发机构，SwRI拥有丰富的项目管理经验。
“我们将继续开发先进发动机的概念和其配套技术。同时，很欣慰地看到，在HEDGE
I中开发的概念已经进入到生产阶段。”阿尔基尔博士最后总结道。HEDGE联盟计划已经证明，通过HEDGE™技术可以大幅提高发动机的性能和效率，并且在降低燃油耗的同时尾气排放明显减少。SwRI自己资助的研究中，还调查了燃料对预燃的影响以及潜在的非EGR硬件和控制技术解决方案，但我们的首要目标是要证明如何用我们的冷却EGR技术抑制这种现象。西南研究院也正在研究润滑剂对低速预燃的影响，预计会开始一个新的联盟来开发新的润滑剂和测试方法。
It’s noticed that at 2010 China Auto Engine High-level
Conference last week, Mr. Robert R. Burrahm，the Chief Representative Officer,
SwRI Beijing Representative office, introduced HEDGE II at the conference, which
shows the SwRI’s confidence of HEDGE ™ to help solve problems of emissions and
fuel consumption in Chinese automobile industry.
据悉，在上周的发动机高层论坛研讨会上，来自美国西南研究院的北京代表处的首席代表，罗伯特布瑞恩先生作了关于HEDGE
II的相关报告，显示了SwRI对于HEDGE™高效稀燃汽油机技术可以帮助中国汽车制造业有效解决当下排放与燃油耗难题的信心。
The next meeting for the HEDGE II Consortium is scheduled
for June 21, 2010. For more information about the consortium, contact Alger at
(210) 522-5505, fax (210) 522-2019 or e-mail at
talger@swri.org.
For more information contact
Rob Leibold at (210) 522-2258, Communications Department, Southwest Research
Institute, P.O. Drawer 28510, San Antonio, TX 78228-0510.
SwRI Beijing Representative Office News Release
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March 25, 2013
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