Synthetic automotive fuels

28 March 2023 the EU Council has adopted a regulation setting stringent carbon dioxide emission standards for new cars and vans. Under the new law, new vehicles with a 100 per cent reduction in carbon dioxide emissions will be able to be registered after 2035. The new EU legislation sets the following targets: a 55 per cent reduction in CO2 emissions for new cars and 50 per cent for new vans between 2030 and 2034 compared to 2021 levels; a 100 per cent reduction in CO2 emissions for both new cars and vans from 2035. This will result in only electric or hydrogen-powered cars and vans being able to be registered after 2035. The fuel omitted from the Fit for 55 packages within cars and vans is hydrotreated vegetable oil. According to the research carried out so far, it is possible to replace diesel with HVO fuel even without interference with the fuel injection control system. If an internal combustion engine is fuelled with HVO fuel instead of diesel, the greenhouse gas emissions can be reduced by up to 90 per cent. What is more, the technology for using HVO fuel has many more possibilities for reducing CO2 emissions, if only by refining the exhaust after-treatment process. The exclusion of this fuel from the Fit for 55 package raises serious doubts about the quality of the analyses based on which HVO fuel was not included in the Fit for 55 packages.

Section: Fit For 55mentioning

confidence: 99%

Hydrotreated vegetable oil fuel within the Fit for 55 package

Sikora,

Orliński

2023

“…An alternative to FAME fuel can be hydrotreated vegetable oil (HVO). It is a synthetic liquid biofuel free of aromatics, oxygen, and sulfur [22]. In terms of chemical structure, it consists of straightchain paraffinic hydrocarbons.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of selected combustion parameters in a compression-ignition engine powered by hydrogenated vegetable oil (HVO)

Orliński,

Sikora,

Bednarski

et al. 2024

The article carries out a detailed analysis and evaluation of indicators related to the combustion process (pressure and temperature in the engine combustion chamber, heat release rate, heat release fraction) in a JCB 444 TA4i compression-ignition engine fuelled with diesel and hydrogenated vegetable oil (HVO). During the empirical tests, the operation of the exhaust gas recirculation (EGR) system was stopped and no other changes were made to the engine settings (factory settings were used). In the first stage, the empirical tests were carried out at speed characteristics on an engine dynamometer. Then, an experiment was carried out at the engine crankshaft speed corresponding to the maximum torque - which consisted of determining the indicators related to the combustion process at a constant mass flow of fuel: diesel and HVO fuel. This provided information on the effect of hydrogenated vegetable oil on the combustion process in relation to the diesel engine feed. The conclusions drawn from the empirical study can be used to develop guidelines to change the operating map of a compression-ignition engine when it is fed with hydrogenated vegetable oil.

“…Various types of alternative fuels are still being developed to decrease emissions [2,15,16], although uniquely hydrogen is a fuel that inherently does not produce carbonrelated emissions when combusted, thus serving as a suitable substitute to classic liquid fuels [5,7,8,21]. The combustion of hydrogen still requires minimization of nitrogen oxide emissions, and the distinct nature of hydrogen as a fuel in comparison to gasoline requires advanced control methods to enhance the efficiency of the process.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of a pressure sensing glow plug in terms of its application possibility to control the combustion process of a hydrogen-powered spark-ignition engine

Noga,

Moskal

2023

The article contains the results of an analysis of the suitability of a pressure sensing glow plug for use in a hydrogen engine control system. Due to the properties of hydrogen, the process of its combustion in spark-ignition engines is significantly different from the classic fuels. It is planned to use the pressure sensor signal to control the combustion process to obtain high power and efficiency, with the lowest possible emission of nitrogen oxides, which is the main harmful component of hydrogen engines. After an initial assessment of suitability, it was decided to use a pressure sensing glow plug. This choice is dictated by the low price, good availability and high durability of these sensors. The preliminary tests were carried out using a low-power single-cylinder SI engine coupled with a 48V generator. The tests were carried out for several values of engine speed and load of the generator and for classic gasoline with a research octane number (RON) of 95. In order to obtain an increased pressure rise rate in the cylinder, as for hydrogen fueling, the engine operation was also tested with unmodified light gasoline used as solvent, which is characterized by a significantly lower RON value. The use of a reference pressure sensor in the cylinder made it possible to determine the behavior of the PSG in various operating conditions. The tests revealed that the differences in the pressure waveforms registered with both sensors can be systematized depending on the engine speed and its load.