Der Weg zum konsequenten Downsizing Motor mit kontinuierlich variablem Verdichtungsverhältnis in einem Demonstrationsfahrzeug

Pischinger, Stefan; Habermann, Knut; Yapici, Kurt Imren; Baumgarten, Henning; Kemper, Hans

doi:10.1007/bf03226704

Cited by 7 publications

(1 citation statement)

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“…where ε is the compression ratio, k is the specific heat ratio [1]. Higher efficiency results in lower fuel consumption; therefore, paper [13] presents the desired compression ratio variability compared to the engine's overall characteristics. Hence, many research facilities work on variable compression ratio engines; however, such engines are still being tested, as in the case of HCCI engines.…”

Section: Motivation For Taking Up the Topicmentioning

confidence: 99%

Improving the Efficiency of Spark-Ignition Internal Combustion Engine Using a Novel Electromagnetic Actuator and Adapting Increased Compression

et al. 2023

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This paper presents an empirical study of a spark-ignition internal combustion engine with modifications made to increase its effectiveness. The modification was implemented bi-directionally in terms of changes to the compression ratio and changes to the engine’s valve train. The compression ratio was increased by 2.3 units by design and a hybrid intake valve opening control was used in the engine’s valve train. The hybrid control involved autonomous control of one of the inlet valves with a dedicated electromagnetic actuator. The designed electromagnetic actuator was mounted downstream of the single-cylinder engine’s intake system’s modified camshaft to control the effective compression pressure build-up. Field calculations were carried out for the electromagnetic actuator’s design variants and its current characteristics were determined. The multivariate calculations were carried out in order to find the quasi-optimal geometry of the actuator. The width and height of magnetic field coils and the dimensions of the stator poles were changed, while maintaining the same external dimensions of the actuator to enable its mounting in the cylinder head system. In the next step, the prototype of the actuator was made and placed on the combustion engine in order to conduct the experimental investigations. The work was aimed at improving the internal combustion engine’s efficiency at the low load range, as this is load range in which it has low efficiency despite it being the most often used during normal vehicle operation. The original measurement stand was prepared, and many tests were carried out in order to investigate the influence of the electromagnetic valve on the combustion engine characteristic. This improved the internal combustion engine’s efficiency at its low-load range by up to 25%. Both calculation and measurement results are presented in form of graphs.

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Section: Motivation For Taking Up the Topicmentioning

confidence: 99%

Improving the Efficiency of Spark-Ignition Internal Combustion Engine Using a Novel Electromagnetic Actuator and Adapting Increased Compression

et al. 2023

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Trends—Spark Ignition

Pischinger

Nijs

Adomeit

et al. 2014

Encyclopedia of Automotive Engineering

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Current and future combustion engine development targets a considerable reduction in fuel consumption and emissions to meet strict emission legislation despite steady or increasing customer comfort and performance demands. Additionally, reduced time to market is required despite increasing variations in customer demands and fuel qualities in worldwide markets. To meet these targets, gasoline engines have made progress in efficiency by the introduction of technologies such as direct injection in combination with downsizing and turbo‐ or supercharging, valve train variability, and a variety of additional measures to reduce friction losses such as electrification of accessories. In this article, current and future engine development trends are described and illustrated in detail. Potential future measures to further reduce fuel consumption are pointed out and evaluated. Besides well‐known mega trends such as downsizing and variable valve trains, concepts such as controlled autoignition, variable compression, and new ignition systems are considered. In general, the article shows the potential of new technologies to improve fuel consumption and emission behavior of future combustion engines.

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The Future of Vehicle Propulsion – Combustion Engines and Alternatives

Pischinger

2004

Topics in Catalysis

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Der Weg zum konsequenten Downsizing Motor mit kontinuierlich variablem Verdichtungsverhältnis in einem Demonstrationsfahrzeug

Cited by 7 publications

References 1 publication

Improving the Efficiency of Spark-Ignition Internal Combustion Engine Using a Novel Electromagnetic Actuator and Adapting Increased Compression

Improving the Efficiency of Spark-Ignition Internal Combustion Engine Using a Novel Electromagnetic Actuator and Adapting Increased Compression

Trends—Spark Ignition

The Future of Vehicle Propulsion – Combustion Engines and Alternatives

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