An experimental study on premixed-charge compression ignition gasoline engine
About: This article is published in Jsae Review.The article was published on 1995-07-01. It has received 254 citations till now. The article focuses on the topics: Carbureted compression ignition model engine & Homogeneous charge compression ignition.
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TL;DR: In this paper, five types of models applied to HCCI engine modelling are discussed in the present paper, and specific strategies for diesel-fuelled, gasoline-fined, and other alternative fuelled combustion are also discussed.
1,068 citations
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...simultaneously at multiple sites within the combustion chamber and that there is no discernable flame propagation [1,5,6]....
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Patent•
23 Feb 1999
TL;DR: In this paper, a premixed charge compression ignition engine, and a control system, is provided which effectively initiates combustion by compression ignition and maintains stable combustion while achieving extremely low nitrous oxide emissions, good overall efficiency and acceptable combustion noise and cylinder pressures.
Abstract: A premixed charge compression ignition engine, and a control system, is provided which effectively initiates combustion by compression ignition and maintains stable combustion while achieving extremely low nitrous oxide emissions, good overall efficiency and acceptable combustion noise and cylinder pressures. The present engine and control system effectively controls the combustion history, that is, the time at which combustion occurs, the rate of combustion, the duration of combustion and/or the completeness of combustion, by controlling the operation of certain control variables providing temperature control, pressure control, control of the mixture's autoignition properties and equivalence ratio control. The combustion control system provides active feedback control of the combustion event and includes a sensor, e.g. pressure sensor, for detecting an engine operating condition indicative of the combustion history, e.g. the start of combustion, and generating an associated engine operating condition signal. A processor receives the signal and generates control signals based on the engine operating condition signal for controlling various engine components to control the temperature, pressure, equivalence ratio and/or autoignition properties so as to variably control the combustion history of future combustion events to achieve stable, low emission combustion in each cylinder and combustion balancing between the cylinders.
624 citations
TL;DR: In this article, the authors demonstrate the multi fuel capability of a homogeneous charge compression Ignition Engine with Variable Compression Ratio (VCR) and demonstrate its multi-fuel capability.
Abstract: Demonstrating the Multi Fuel Capability of a Homogeneous Charge Compression Ignition Engine with Variable Compression Ratio
512 citations
TL;DR: In this article, the influence of supercharging on HCCI was investigated and three different fuels were used during the experiments: iso-octane, ethanol and natural gas, and two different compression ratios were used, 17:1 and 19:1.
Abstract: The Homogeneous Charge Compression Ignition (HCCI) is the third alternative for combustion in the reciprocating engine. Here a homogeneous charge is used as in a spark-ignited engine, but the charge is compressed to autoignition as in a diesel. The main difference compared with the Spark Ignition (SI) engine is the lack of flame propagation and hence the independence from turbulence. Compared with the diesel engine, HCCI has a homogeneous charge and hence no problems associated with soot and NOdx formation. Earlier research on HCCI showed high efficiency and very low amounts of NOdx, but HC and CO were higher than in SI mode. It was not possible to achieve high IMEP values with HCCI, the limit being 5 bar. Supercharging is one way to dramatically increase IMEP. The influence of supercharging on HCCI was therefore experimentally investigated. Three different fuels were used during the experiments: iso-octane, ethanol and natural gas. Two different compression ratios were used, 17:1 and 19:1. The inlet pressure conditions were set to give 0, 1, or 2 bar of boost pressure. The highest attainable IMEP was 14 bar using natural gas as fuel at the lower compression ratio. The limit in achieving even higher IMEP was set by the high rate of combustion and a high peak pressure. Numerical calculations of the HCCI process have been performed for natural gas as fuel. The calculated ignition timings agreed well with the experimental findings. The numerical solution is, however, very sensitive to the composition of the natural gas. (Less)
365 citations
TL;DR: Low temperature combustion (LTC) is an advanced combustion concept for internal combustion (IC) engines, which has attracted global attention in recent years as discussed by the authors, which offers prominent benefits in terms of simultaneous reduction of both oxides of nitrogen (NO x ) and particulate matter (PM), in addition to reduction in specific fuel consumption (SFC).
320 citations
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01 Feb 1979
TL;DR: Active Thermo-Atmosphere Combustion (ATAC) as discussed by the authors is a new lean combustion process for internal combustion engines that differs from conventional gasoline and diesel engine combustion processes.
Abstract: A new lean combustion process for internal combustion engines has been developed. This newly devised combustion system, designated as "Active Thermo-Atmosphere Combustion" (ATAC), differs from conventional gasoline and diesel engine combustion processes. ATAC can be applied most easily to two-stroke cycle gasoline engines. Stable combustion can be achieved with lean mixtures at part-throttle operation. With ATAC the fuel consumption and exhaust emissions of two-stroke cycle spark-ignition engines are remarkably improved, and noise and vibration are reduced.
956 citations
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