Investigation into the Applicability of an Optical Fiber Sensor for Knock Detection and Knock Control System

Spicher, Ulrich; Spiegel, L.; Reggelin, B.; Heuser, G.

doi:10.4271/922370

Cited by 17 publications

(2 citation statements)

References 14 publications

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“…The substance of the algorithmic method named pressure correction method is solution by iterative method which includes the algorithmic of PISO [3], SIMPLE and SIMPLEC. The paper adopts the SIMPLE method to simulate the gas explosion [4～7] .…”

Section: Mathematical Model and Algorithmic Methodsmentioning

confidence: 99%

Numerical Simulation on the Influence of Flammable Gas Concentration on Explosion Peak Pressure

Xiao

2014

AMR

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This paper simulates the alternation of the maximum explosion overpressure on the different condition of the concentration based on the fluent software. The results show the maximum explosion overpressure increases in the earlier stage and then decreases in the later stage because of the different flammable gas concentration: the maximum explosion overpressure enhanced in 6% gas concentration and drops in 12% gas concentration; it augments in 6% gas concentration and drops in 12% gas concentration with the joining of the hydrogen; the explosion pressure peaked just at the 9% concentration of the flammable gas.

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Section: Mathematical Model and Algorithmic Methodsmentioning

confidence: 99%

Numerical Simulation on the Influence of Flammable Gas Concentration on Explosion Peak Pressure

Xiao

2014

AMR

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“…The detonation theory suggests that the normal spark-ignition flame front undergoes a transition from a subsonic deflagration to a supersonic detonation coupled with shock waves [Spicher, U. et al, 1992]. Simply put, the normal flame front associated with pre-mixed combustion accelerates to sonic velocity and consumes the end gas (unburned air-fuel mixture) at a rate much faster than would occur with normal flame speeds, thus creating the large pressure gradients associated with shock waves.…”

Section: Detonation Theorymentioning

confidence: 99%

Multivariate Knock Detection for Development and Production Applications

Tousignant

Reader

Tjong

2004

Transportation: Transportation and Environment

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Combustion knock caused by end gas autoignition continues to be a limiting factor in the performance of automotive internal combustion engines. As such, the availability of efficient knock detection methods is a prime requirement for the optimization of engine mapping and control. Current production knock control systems are based on the measurement of mechanical vibration induced by the acoustic resonance excited in the combustion chamber during autoignition. These vibrations are measured using accelerometers on the engine block. Conversely, knock detection in the laboratory environment during engine development or calibration generally involves either acoustic methods or acquisition of in-cylinder pressure. The purpose of this study is to develop an improved multi-transducer vibration-based knock detection method with applications in engine development and production. The possibility of replacing the pressure-based detection methods in the laboratory environment presents many advantages relating to cost and efficiency. Moreover, the economy of a vibration-based system coupled with improved correlation to laboratory methods represents great potential for performance improvements if applied to production applications.

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