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首页> 外文会议>Proceedings of the 2009 spring technical conference of the ASME Internal Combustion Engine Division >A TURBOCHARGED, SPARK-IGNITION ENGINE: RESULTS FROM AN ENGINE CYCLE SIMULATION INCLUDING THE SECOND LAW OF THERMODYNAMICS
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A TURBOCHARGED, SPARK-IGNITION ENGINE: RESULTS FROM AN ENGINE CYCLE SIMULATION INCLUDING THE SECOND LAW OF THERMODYNAMICS

机译：涡轮增压火花点火发动机：来自发动机循环模拟的结果，其中包括热力学第二定律

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摘要

The use of turbocharging systems for spark-ignition engines has seen increased interest in recent years due to the importance of fuel efficiency, and in some cases, increased performance. An example of a possible strategy is to use a smaller displacement engine with turbocharging rather than a larger engine without turbocharging. To better understand the tradeoffs and the fundamental aspects of a turbocharged engine, this investigation is aimed at determining the energy and exergy quantities for a range of operating conditions for a spark-ignition engine.rnA 3.8 liter automotive engine with a turbocharger and intercooler was selected for this study. Various engine performance and other output parameters were determined as functions of engine speed and load. For the base case (2000 rpm and a bmep of 1200 kPa), the bsfc was about 240 g/kW-h. At these conditions, the second law analysis indicated that the original fuel exergy was distributed as follows: 34.7% was delivered as indicated work, 16.9% was moved via heat transfer to the cylinder walls, 23.0% exited with the exhaust gases, 20.6% was destroyed during the combustion process, 2.5% was destroyed due to inlet mixing processes, and 1.9% was destroyed due to the exhaust processes. The turbocharger components including the intercooler were responsible for less than 1.0% of the fuel exergy destruction or transfer.
机译：近年来，由于燃油效率的重要性，在某些情况下，性能的提高，火花点火发动机使用涡轮增压系统引起了越来越多的关注。可能策略的一个示例是使用带涡轮增压的较小排量发动机，而不是不带涡轮增压的较大排量发动机。为了更好地理解涡轮增压发动机的权衡和基本方面，本研究旨在确定火花点火发动机在各种运行条件下的能量和火用量。选择了带有涡轮增压器和中冷器的3.8升汽车发动机这项研究。确定了各种发动机性能和其他输出参数，作为发动机转速和负载的函数。对于基本情况（2000 rpm和bmep为1200 kPa），bsfc约为240 g / kW-h。在这些条件下，第二定律分析表明原始燃料的火用分布如下：按指示工作交付了34.7％，通过热传递到气缸壁移动了16.9％，废气排出了23.0％，废气排放了20.6％。燃烧过程中被破坏，进气混合过程被破坏了2.5％，排气过程被破坏了1.9％。包括中冷器在内的涡轮增压器组件所造成的燃料火用破坏或转移的比例不到1.0％。

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