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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01 Oct 1992
20 citations
TL;DR: In this paper, a single-cylinder Ricardo Hydra camless research engine equipped with a side mounted direct injector was modeled by ANN and hybridization of ANNs with PSO with two standard training methods.
20 citations
Patent•
29 Jun 1990
TL;DR: In this paper, the authors proposed to perform satisfactory combustion by jetting the total required fuel jet amount when it is not more than a first jet amount, that is, under a low load.
Abstract: PURPOSE:To perform satisfactory combustion by jetting the total required fuel jet amount when it is not more than a first jet amount, that is, under a low load, and jetting the fuel jet amount while being distributed to intake and compression processes when it is less than a second and not less than a third jet amount, that is, under a medium load. CONSTITUTION:In a control unit 20, a fuel pressure detected by a sensor 27, an engine speed obtained from a crank angle signal of a sensor 29, accelerator opening angle detected by a sensor 30, etc., are input to compute a fuel jet amount. When the required fuel jet amount is not more than a first jet amount which is a sum of a minimum compression process jet amount for an ignition plug 65 enough to form ignitable air fuel mixture and a minimum intake process jet amount enough to propagate frame, a fuel jet valve 5 is controlled such that the total amount is jet during compression process. When the required jet amount is not less than a third jet amount which is less than a second jet amount enough to form an even air-fuel mixture and not less than the first amount, the total amount is jet while being distributed to the intake and compression processes. Satisfactory ignition and combustion are thus performed.
20 citations
TL;DR: Oxygen was added to the intake air of a spark ignition engine to determine its effects on exhaust emissions and engine performance as mentioned in this paper, which can be largely attributed to high flame temperatures and/or flame speeds with Os enriched air.
Abstract: Oxygen was added to the intake air of a spark ignition engine to determine its effects on exhaust emissions and engine performance. Increasing the content of O2 in the intake air of the engine from 21 to 32 percent by volume, increased exhaust nitric oxide emissions, decreased exhaust hydrocarbon emissions, decreased thermal efficiency and permitted leaner engine operation. These effects can be largely attributed to high flame temperatures and/or flame speeds with Os enriched air.
20 citations
08 Sep 2013
TL;DR: In this article, a traditional spark ignition engine converted to mono-cylinder operation was used to investigate the performance and emissions of methyl and ethyl valerates for SI engines.
Abstract: As an alternative to second generation ethanol, valeric esters can be produced from lignocellulose through levulinic acid. While some data on these fuels are available, only few experiments have been performed to analyze their combustion characteristics under engine conditions. Using a traditional spark ignition engine converted to mono-cylinder operation, we have investigated the engine performances and emissions of methyl and ethyl valerates. This paper compares the experimental results for pure valeric esters and for blends of 20% of esters in PRF95, with PRF95 as the reference fuel. The esters propagate faster than PRF95 which requires a slight change of ignition timing to optimise the work output. However, both the performances and the emissions are not significantly changed compared to the reference. Accordingly, methyl and ethyl valerate represent very good alternatives as biofuels for SI engines. Future studies will focus on testing these esters in real application engines and performing endurance tests.
20 citations