
Mario Eduardo Santos MartinsFederal University of Santa Maria · Department of Mechanical Engineering (DEM)
Mario Eduardo Santos Martins
PhD
About
140
Publications
64,102
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1,417
Citations
Introduction
Mario Eduardo Santos Martins currently works at the Department of Mechanical Engineering (DEM), Universidade Federal de Santa Maria. His current projects are both experimental and numerical about 'The use of wet ethanol in SI engines', 'HCCI of hydrous ethanol with diesel exhaust heat recovery', 'Variable Compression Ratio for internal combustion engines', 'Racing Engine Performance Development', 'Piston Engines for low grade steam expansion', 'butanol combustion', 'diesel and vegetable oil combustion', etc.
Additional affiliations
January 2010 - March 2019
February 2002 - August 2003
Volkswagen Trucks and Buses of Brazil
Position
- Engineer
Description
- Day-to-day supervision of various dealers and their technical assistance operations; after-sales work; problem solving, fault reporting, warranty requests analysis, recall management and follow up.
Education
September 2003 - September 2007
March 1999 - February 2002
March 1993 - October 1998
Publications
Publications (140)
This study investigates the efficiency and combustion characteristics of a hydrogen port fuel injection (PFI) spark ignition (SI) engine under various load levels, excess air ratios and intake pressures. Experiments were conducted on a single-cylinder research engine to evaluate the effects of throttle opening and supercharging on pumping work and...
The automotive industry has long prioritized the search for more efficient engines, driven by environmental concerns, fuel prices, and consumer demand for fuel-efficient vehicles. Various technologies and strategies are explored to enhance performance while reducing fuel consumption and emissions. Despite potential combustion stability issues, tech...
div class="section abstract"> The use of green hydrogen as a fuel is a promising solution for reducing greenhouse gas emissions from our current fleet of petrol-fueled vehicles. However, achieving zero emissions remains a challenge due to the higher relative air-to-fuel ratio (lambda) required to avoid NOx formation during periods of increased load...
div class="section abstract"> The development and improvement of efficient compressed natural gas (CNG) engines align with efforts to reduce greenhouse gas and pollutant emissions. The objective of this study is to evaluate the flame structure and compare the performance characteristics of an engine powered by compressed natural gas (CNG) under sto...
div class="section abstract"> In order to further explore the potential of hydrogen as an alternative fuel, this study aims to validate a computational fluid dynamics model for hydrogen combustion in a port fuel injection spark ignition engine. The engine operates at 1800 rpm with a compression ratio of 10:1, under two lean combustion conditions: e...
div class="section abstract"> Computational tools have become indispensable in the development of cam profiles, aiding designers in achieving optimal performance. This paper explores the application of computational tools in the design of cam profiles for a single-cylinder research engine (SCRE) prototype under development with a direct-acting mech...
div class="section abstract"> The use of green hydrogen as a fuel for internal combustion engines is a cleaner alternative to conventional fuels for the automotive industry. Hydrogen combustion produces only water vapor and nitrogen oxides, which can be avoided with ultra-lean operation, thus, eliminating carbon emissions, from a tank-to-wheel pers...
div class="section abstract"> Experimental aviation engines face numerous challenges, including the need for energy efficiency, alternative fuel sources, reduced weight and size, greater durability with reliability, emissions reduction, and integration with advanced control and monitoring systems. This study presents the performance of a two-stroke...
An ethanol-fueled Atkinson cycle PFI SI engine using exhaust rebreathing (ER) was evaluated under 110 different operating conditions. While ethanol is an important biofuel to reduce greenhouse gas emissions, Atkinson cycle engines have been studied as low-consumption alternatives for hybrid architecture vehicles. The operating conditions were valid...
Wet ethanol is a renewable fuel that has great potential to reduce the energy cost of ethanol production and improve the life-cycle carbon footprint of ethanol. The use of wet ethanol in homogeneous charge compression ignition (HCCI) mode can achieve high efficiency with low emission levels. In this context, this study investigates the effects of w...
With the growing concern about the environmental impact of internal combustion engines, several efforts have been made in order to gradually replace the use of fossil fuels and in that context, alternative biofuels can be highlighted. In addition, internal combustion engines undergo increasingly strict regulations in order to minimize emissions. In...
Battery Electric Vehicles (BEVs), Hybrid Electric Vehicles (HEVs) and Fuel Cell Vehicles (FCEVs) are potential alternatives to replacing the Internal Combustion Engine Vehicles (ICEVs). However, these new possibilities, that aim to make mobility more sustainable, still lack greater research and development to boost their competitiveness and achieve...
Breweŕs spent grain is the highest volume by-product of the brewing industry. When inappropriately disposed of, it represents a serious environmental hazard. Despite the availability and the possibilities that the literature presents, few Brazilian companies use breweŕs spent grain as raw material for composting, animal feed, or energy production....
Several efforts are required to improve engine efficiency and decrease global carbon dioxide (CO 2 ) emissions and local pollutant products. In countries like Brazil, with a four-decade long experience with ethanol, the use of fossil fuels, although widespread, is being put under intense scrutiny. Governmental programs like ROTA 2030 stimulate engi...
This study aims to evaluate the financial and economic feasibility of implementing a biorefinery to process the solid waste, called brewers’ spent grain, generated in the production of craft beer into special flour. In addition, to present a path for open innovation in the possibility of replication of the process and technology used in the plant....
Stringent environmental legislation demands development of internal combustion engines seeking higher thermal efficiency to reduce greenhouse gas emissions. Brazilian governmental programs like ROTA 2030 and RenovaBio drive the research and development of highly efficient engines fueled with biofuels, like sugarcane bioethanol, that has a near to z...
Carbon neutral solutions are demanded to reduce the greenhouse gas (GHG) emissions
from the mobility sector. In Brazil, alongside bioethanol, natural gas and biogas are po-
tential solutions towards a low carbon future. While Brazilian natural gas market growth
has increased due to recent offshore discoveries, its biogas potential is one of the lar...
S tringent emission legislations have pushed engine operation to borderline knock. Knocking combustion limits engine efficiency, putting a threshold in carbon emission reduction that impairs further decarbonization of the transport sector. In this way, online knock monitoring is very important during engine development and calibration to allow oper...
Homogeneous charge compression ignition (HCCI) combustion is low-temperature combustion (LTC) mode that offers an alternative to conventional combustion modes. The advantages of HCCI combustion include high conversion efficiency and low NOx emissions. On the other hand, a direct control mechanism for combustion phasing control is not attainable as...
This study describes how industrial symbiosis is reposed in studies dealing with the Brazilian context. This study was based on a systematic literature review in the Scopus and Web of Science databases, relying on the Prisma method and a research protocol. The results embrace quantitative and qualitative aspects such as the number of publications,...
Homogeneous charge compression ignition (HCCI), also known as Controlled Auto-Ignition (CAI), enables combustion with high fuel conversion efficiency and low NOX emissions. It can benefit both spark and compression ignition engines and lessens the demand for expensive exhaust after-treatment systems. However, the HCCI application is restricted due...
Low Temperature Combustion (LTC) is an emerging technology that offers an alternative to conventional spark and compression ignition. A highly discussed LTC mode is homogeneous charge compression ignition (HCCI), which consists in a combustion of a highly diluted well-mixed charge at the end of compression stroke, when the charge reaches the auto-i...
Carbon neutral solutions are demanded to reduce the greenhouse gas (GHG) emissions from the mobility sector. In Brazil, alongside bioethanol, natural gas and biogas are potential solutions towards a low carbon future. While Brazilian natural gas market growth has increased due to recent offshore discoveries, its biogas potential is one of the large...
Current mobility is highly dependent on fossil fuels which are the energy vectors of internal combustion engines, which power more than 99% of all road vehicles. In order to reduce pollutant emissions from ever growing urban centers, electric vehicles have emerged and their importance is growing steeply. However, these still face several problems r...
Craft breweries have been expanding and standing out in the Brazilian market. The increase in the number of breweries entails a concern with the waste generated in the production process. This article addresses the concepts of Circular Economy and Industrial Symbiosis and aims to seek evidence of SI in production waste sharing in craft breweries, d...
Bees play a fundamental role in the ecological balance of ecosystems, due to the pollination process they carry out on crops, including the production of honey. However, the mortality of bees is a significant concern; bee mortality can occur for several reasons, such as pesticides, mites, viruses, climate change, pathogens and a reduction in food r...
Universal concerns about harmful emissions, strict emission regulations and global warming have motivated research of engines operating with alternative combustion concepts. Low temperature combustion (LTC) is an advanced concept for internal combustion engines, which will be able to replace the conventional combustion modes and have the advantage...
Our dependence on fossil fuels coupled with concerns about harmful emissions have motivated researchers to look for renewable fuels that have clean combustion and for advanced combustion modes. In this context, homogeneous charge compression ignition (HCCI) is an emerging technology which offers an alternative to conventional spark ignition and com...
Wet ethanol applications in compression ignition engines may become important in the coming years due to the possibility of replacing a fossil fuel by a renewable one, with low production cost and accessible production in remote regions. In this context, this research sought to explore the use of renewable fuel and its potential for operation in an...
Over the past decades, internal combustion engines (ICEs) have struggled with ever stringent emission legislation. Nowadays, the downsizing concept is becoming largely employed in spark ignition engines due to increased engine efficiency. However, the presence of turbocharging and direct fuel injection system makes the strategies of engine manageme...
Homogeneous charge compression ignition (HCCI) is an emerging technology that offers an alternative to conventional spark ignition and compression ignition engines. Low-temperature combustion, which can result in low NOx emissions with high indicated efficiency, is the more important characteristic of this combustion mode. The main problem is the c...
Tests were conducted on a spark ignition engine fueled with ethanol fuels with water content up to 30% by volume. Engine experiments, along with the determination of in-cylinder state variables by GT-Power® computational routines, allowed to identify representative engine operating conditions for ethanol oxidation. Reactor simulations with Cantera®...
Formula Student/FSAE competitions establish noise limits for Formula SAE prototypes powered by internal-combustion engines; thus ensuring auditory protection for all participants. Current regulations establish sound pressure level (SPL) limits of 103,0 dB(C) and 110 dB(C) for idle engine speed and test speed conditions, respectively, under specific...
Exhaust silencer design in motorsport is a matter of establishing the best compromise between rules compliance, mass savings and engine restriction. A design methodology that acknowledges these difficulties is likely to be desirable to ensure that the best solution is always provided for the competing team. The present work takes into account a com...
The n-butanol, an alcohol with chemical characteristics similar to gasoline, was evaluated experimentally in a spark ignition (SI) engine and through two-zone computer modelling. To do so, n-butanol was burned as a pure fuel and compared to hydrous ethanol, and a blend of n-butanol/ethanol was compared to a blend of gasoline/ethanol in order to eva...
Fuel consumption standards imposed in several countries for the next years have prompted the development of hybrid passenger cars with ever smaller internal combustion engines. In such powertrain, fuel consumption is as important as engine packaging and power density, so two-stroke engines may be an option due to their higher combustion frequency c...
Gasoline spark-ignited internal combustion engines for passenger cars are still a major part of the worldwide market share. With legislation pushing towards a lower carbon footprint, many technological alternatives are under scrutiny. Among them, one of the most promising is a variable compression ratio (VCR). This paper aims to experimentally prov...
The use of fossil fuels favors the emission of greenhouse gases (GHG). With that in mind, there is a growing need to find sustainable energy options for the transport sector. Hydrogen appears as a potential substitute for fossil fuels. In this way, the objective of this study is to map the hydrogen economy through the patent consultation in the per...
Using Exhaust Gas Recycling (EGR) on internal combustion engines enables the reduction of emissions with a low or even no cost to the engine efficiency at part-load operation. The charge dilution with EGR can even increase the engine efficiency due to de-throttling and reduction of part load pumping losses. This experimental study proposed the use...
Of all the biofuels available in the market, ethanol seems to be the most promising one for spark-ignited engines. However, its lower calorific value makes operation more expensive due to increased volumetric fuel consumption, when compared to gasoline. Measures that further increase efficiency and that reduce fuel costs are necessary for a more wi...
In the industrial revolution, steam engines were the main responsible for the huge increase in production capacity and were used in the most diverse applications. When it comes to electricity production, its efficiency for minigeneration (between 75 kW and 5 MW) may exceed that of other renewable energy sources such as hydric, solar and wind. Consi...
Internal Combustion Engines (ICE) have their use highly disseminated in the most diverse operations. Exhaust gaseous emissions and fuel consumption have been on the scope for decades and therefore the necessity for research on more efficient and lower exhaust emission engines has increased. Considering the cost of equipment and software to develop...
The possibility to vary compression ratio offers a new degree of
freedom that may enable so far not exploited benefits for the
combustion process especially for highly boosted spark ignited
engines. Numerous approaches to enable a variable compression ratio
(VCR) have been tried and tested in the past. Nevertheless, none of
these systems reached se...
Vegetable oils have been seen as promising surrogates to petroleum
diesel in compression ignition internal combustion engines, showing
similar performance and combustion characteristics of the fossil fuel.
Nevertheless, the use of straight (crude) vegetable oil (SVO) is
unfavorable due to its high viscosity, which affects the Sauter Mean
Diameter o...
This work compares the emissions and performance of two dual-mode reactivity controlled compression ignition (RCCI) combustion strategies under the World Harmonized Vehicle Cycle (WHVC), a chassis dynamometer version of the World Harmonized Transient Cycle (WHTC) test proposed by the EURO VI emission regulation for heavy-duty engines. The major dif...
Fossil fuels are responsible for a significant portion of the emissions of greenhouse gases. As the need to find renewable and environmentally friendly energy solutions grows, the tendency is for these sources increase in the vehicle matrices, gradually. Because of this, hydrogen appears as a potential alternative to fossil fuels. Hydrogen is one o...