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.

Discrete Simplified External Linearization and Analytical Comparison of IC Engine Families

Abstract: A general, nonlinear spark ignition engine model is presented. Speed dependent discretization is employed to develop a linearized formulation for four and six cylinder port fuel injected engine representations. The methods presented provide a foundation for the application of classical or modern control techniques to internal combustion (IC) engine related control problems.

Performance analysis of ethanol–gasoline blends on a spark ignition engine: a review

Abstract: Alternative fuels have an important role to play for both spark ignition and compression ignition engines, the prime reasons being the need to trim down the dependency on gasoline as a fuel and its economic aspects. Many investigations have primarily focused on using alternative fuels to see the diminishing effect on fuel consumption. The aim of this review is to study and analyze the range of opportunities and future prospects of introducing blends of gasoline–ethanol, gasoline with all other alcohols derivative and subsequent alternative fuels in varying percentage ratios in the existing spark ignition engines by diagnosing various aspects such as air–fuel ratio, operating cylinder pressure, ignition timing and compression ratio related to the performance parameters only. Ethanol blends in lower proportions showed an increment in the range of 2.31–4.16% for the engine torque and 0.29–4.77% for brake power. Brake specific fuel consumption (BSFC) increased for higher volume of ethanol content in t...

Integral Length Scales and Time Scales of Turbulence in an Optical Spark-Ignition Engine

Abstract: In-cylinder air flow structures are known to play a major role in mixture preparation and flame development in spark-ignition engines. In this paper both LDV and PIV measurements were undertaken in an optical spark-ignition at 1500 RPM 0.5 bar inlet plenum pressure. One of the primary PIV planes was vertical cutting through the centrally located spark plug (tumble plane) inside the pentroof at ignition timing. The other plane was horizontal inside the pentroof 1 mm below the spark plug LDV was conducted 1 mm below the spark plug on a line from inlet to exhaust but also on a lower line 14 mm below the spark plug. In-cylinder PIV data at specific crank angles in the intake and compression strokes were also analysed on the central tumble plane and on a horizontal plane 14 mm below the spark plug. The combination of both techniques allowed high spatial and temporal resolution as the two data sets complemented each other to provide details of mean flow and turbulence characteristics on different levels, aiming ultimately for quantification of integral time scales and length scales. LDV cycle-resolved analysis distinguished between the classic approach of using the time integral of the autocorrelation function to obtain the integral time scale and a high-frequency cut-off analysis to obtain high- and low-frequency fluctuations about an in-cycle mean.

Device for optimum control of the sparking time of a spark ignition engine, during its operation

Abstract: This device comprises, in combination, means generating a digital value equal to the difference between a number of cycles of the engine and the number of knockings detected during the period of said cycles and means controlling the spark advance point in response to said difference.