Investigation on the response time of a self-regulation variable compression ratio engine
| Autor: | Nicolae-Doru Stănescu, Rodica Niculescu, Vasile Hara, Adrian Clenci |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Variable compression ratio
020209 energy Mechanical Engineering Greenhouse gas 0202 electrical engineering electronic engineering information engineering Response time Environmental science 02 engineering and technology 010501 environmental sciences Combustion 01 natural sciences Automotive engineering 0105 earth and related environmental sciences |
| Zdroj: | Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science. 235:6956-6968 |
| ISSN: | 2041-2983 0954-4062 |
| DOI: | 10.1177/0954406221995226 |
| Popis: | Today, the greenhouse gas (GHG) emissions (specifically, CO2) represent the greatest challenge of the internal combustion (IC) engine and consequently, now, more than ever, the passenger car industry is looking for technologies meant to address this issue. Since CO2 emission is related to the combustion process occurring inside the engine, its reduction is inherently connected to lowering the fuel consumption, meaning that the only way to reduce it in the IC engine is to increase its overall efficiency. One solution to do this over the whole operating area is to fit the engine with a variable compression ratio (VCR) system, which may be advantageously combined with other enhancing-efficiency technologies. However, to avoid knocking and pre-ignition, such an engine should feature an adequate response time during the transition from the maximum compression ratio to the minimum one. Consequently, this paper describes a theoretical investigation on the kinematics and dynamics of a hinged VCR engine’s upper block tilting motion, aiming to show that this engine, as an automatic system with self-regulation of compression ratio, can respond adequately when the operating conditions change fast. This is paramount for the passenger car road mobility, which means anything but steady operation. |
| Databáze: | OpenAIRE |
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