Topic
Spark-ignition engine
About: Spark-ignition engine is a research topic. Over the lifetime, 4352 publications have been published within this topic receiving 66550 citations.
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TL;DR: In this article, the authors compared the performance of the single-pressure Rankine cycle and the ammonia-water cycle as a bottoming cycle to internal combustion engines and found that the ammonia water cycle with gas engines as prime movers generated more power compared to the single pressure Rankine cycles with gas diesel engines.
62 citations
01 Jan 1991
TL;DR: In this paper, a First-Law-based model for the growth of the spark-generated flame kernel in a spark-ignition engine has been developed and applied and applied to show how the basic physics relevant to the early stages of flame growth can explain the observed kernel behavior under real engine operating conditions.
Abstract: A First-Law-based model for the growth of the spark-generated flame kernel in a spark-ignition engine has been developed and applied. The purpose of the study was to show how the basic physics relevant to the early stages of flame growth—electrical energy deposition, chemical energy release, and heat losses to the spark plug—can explain the observed kernel behavior under real engine operating conditions. The primary focus was on how the heat losses to the spark plug electrodes, insulator and ground case effect the rate of flame kernel development and its variation, cycle-by-cycle. It is shown that the heat loss rate from the kernel to the spark plug, and the electrical power fed into the kernel from the discharge positive column, are comparable in magnitude and vary significantly cycle-by-cycle. For flame kernels which remain centered on the plug electrodes and have a high contact area with the plug, the heat losses are higher and spark energy deposited is lower than for the cycles where the kernel is convected away from the electrodes by the flow. With higher heat losses, which can be comparble in magnitude to the combustion energy release for kernels up to a about 1.5 mm radius, the kernel grows significantly more slowly. The model also shows that excessive heat loss to the spark plug can lead to misfire.
62 citations
TL;DR: In this article, an experimental study aiming at improving engine performance through DME addition was carried out on a four-cylinder spark-ignited (SI) gasoline engine, which was modified to be fueled with the mixture of gasoline and DME which were injected into the engine intake ports simultaneously.
62 citations
TL;DR: In this article, an experimental investigation has been performed on the potential of the Atkinson cycle and reducing intake oxygen concentration for pollutant control in a heavy-duty diesel engine, which has been carried out at low engine load (25%).
62 citations
TL;DR: In this article, a laminar growth of the flame in its early stages of development was shown to follow the discharge of the spark plug in the range 2−4 m/s.
61 citations