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 combustion process in a spark ignition engine using the experimental data of an internal pressure during combustion process is analyzed and it is shown that the system can be driven to chaotic behaviour.
Abstract: We analyse the combustion process in a spark ignition engine using the experimental data of an internal pressure during the combustion process and show that the system can be driven to chaotic behaviour. Our conclusion is based on the observation of unperiodicity in the time series, suitable stroboscopic maps and a complex structure of a reconstructed strange attractor. This analysis can explain that in some circumstances the level of noise in spark ignition engines increases considerably due to nonlinear dynamics of a combustion process.
39 citations
TL;DR: In this paper, the authors used experimental design to investigate surrogate fuels to investigate the effect of individual components on fuel properties and commercial engines performance and showed that mixtures of iso-octane, toluene, n-heptane and ethanol could be used as surrogate fuels for oxygenated gasolines.
39 citations
Patent•
10 Dec 1990TL;DR: In this paper, a method for controlling a spark-ignition engine without a throttle flap is carried out with variable inlet valve opening durations and variable acceleration and acceleration signals.
Abstract: A method for controlling a spark-ignition engine without a throttle flap is carried out with variable inlet valve opening durations. The method includes the steps of: detecting a speed signal having a value dependent upon the engine speed; detecting an accelerator pedal signal having a value dependent upon the accelerator pedal position; determining the intake valve opening durations as well as the fuel quantity in dependence upon the particular values of the engine speed signal and the accelerator pedal signal; and, determining the ignition angle in the dependence upon the particular values of the engine speed and fuel quantities. The method affords the advantage that for all driving conditions and even for sudden changes of the accelerator pedal signal, the masses of air and fuel are optimally adapted to each other in order to obtain high driving comfort without misfirings and with low toxic gas exhaust.
39 citations
TL;DR: In this paper, a negatively biased flush-mounted planar probe operated both in a pulsed and dc mode has been used to measure the ionization density in the plasma generated by combustion in a single-cylinder spark-ignition engine.
Abstract: A negatively biased flush‐mounted planar probe operated both in a pulsed and dc mode has been used to measure the ionization density in the plasma generated by combustion in a single‐cylinder spark‐ignition engine. The ionization was measured as a function of the air/fuel ratio and was found to exhibit a broad peak (Q?2) whose maximum occurs slightly to the rich side of stoichiometric. The peak ionization was calculated from two slightly different models for ion collection to be ?1019/m3. Values of this magnitude appear to be more reasonable than the very high value of 4×1021/m3 deduced by Rado using a similar experimental setup. Finally, it is proposed that this type of measurement may be useful to monitor engine performance.
39 citations
TL;DR: In this paper, thermal stratification technique by in-cylinder water injection toward pisis was used to improve thermal efficiency of spark ignition engine under super-lean burn conditions.
Abstract: In order to improve thermal efficiency of spark ignition engine under super-lean burn conditions (excess air ratio λ≈2.0), thermal stratification technique by in-cylinder water injection toward pis...
39 citations