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GDCI engine was significantly better than advanced production spark injection gasoline engines, and comparable to very efficient hybrid vehicle engines at their best efficiency conditions (214 g/kWh). This early work established that gasoline-like fuels with high resistance to autoignition are preferred for PPCI. Combustion stability.
Cost of the new engine relative to gasoline baseline. The approach that Cummins and partners have taken features: Replacing the aluminium V8 gasoline engine and emission control system with smaller diesel (2.8-liter) Exhaust system configuration. Earlier post.). l/100 km) for a vehicle of that size. Source: Cummins.
During its recent Innovation Day presentations ( earlier post ), PSA Peugeot Citroën announced that it will commercialize high-efficiency gasoline engines featuring dedicated exhaust gas recirculation (D-EGR), derived from a collaborative program with SwRI in the US. Click to enlarge. PSA has filed for two patents on its work.
The effects of gasoline ratio on indicated thermal efficiency of HCII and GDBF modes. Researchers at Tsinghua University have compared the combustion and emissions characteristics of two dual-fuel (diesel-gasoline) modes intended to integrate the advantages of both fuels to achieve high thermal efficiency and low emission targets.
At SAE World Congress next week in Detroit, Delphi Automotive will present two technical papers describing its ongoing progress with the Gasoline Direct-Injection Compression-Ignition (GDCI) engine concept. Two-stage supercharger/turbocharger system with two liquid charge air coolers (LCCA) to control intake air temperature (IAT) for GDCI.
The engine of the quasi-monovalent drive system is powered primarily with CNG (Compressed Natural Gas), but can also run on gasoline. The Golf TGI is also equipped with a gasoline tank with a useful capacity of 9 liters (2.4 Driving in CNG mode produces around 25% fewer carbon emissions than with gasoline.
In the area of energy conservation, TMC has developed a new gasoline engine that achieves a maximum 38.5% TMC says it is also working on wireless battery charging. Gasoline engines. liter AR gasoline engine, adopts the Atkinson cycle and D-4S injection system. liter, turbo-charged AR engine, also based on the 2.5-liter
IAV has developed a particularly closed-coupled diesel exhaust gas aftertreatment (EAT) system. A key contribution to this performance must come from the exhaust gas aftertreatment system—across the entire speed and load range. This way, exhaust gas flows through DOC and SCRF before it enters the turbine.
Dennis Assanis at the University of Michigan suggests that accessing the “thermodynamic sweet spot” in high-efficiency, dilute, boosted gasoline engines has the potential for vehicle fuel economy gains between 23% and 58%. Assanis (2012) Thermodynamic sweet spot for high-efficiency, dilute, boosted gasoline engines. Martz and Dennis N.
Volkswagen has developed and deployed a gasoline engine that offers diesel-like fuel economy but is significantly cheaper to buy. Compared with other gasoline engines, the intake valves of the 1.5 Chargers of this kind combined with gasoline engines are usually found only in high-performance cars. l/100 km (49 mpg US).
Under this same operating condition with stoichiometric engine exhaust (and no reforming), they could only sustain stable combustion with EGR under 25%. D-EGR uses fuel-rich combustion in one cylinder and recirculates its exhaust to the intake system, generating brake thermal efficiency as high as 42.5% —Jim Szybist, ORNL.
in hybrid drive with the option of inductive charging is a major step toward the mobility of the future. At part load, indirect injection supplements gasoline direct injection for lower fuel consumption. The exhaust manifold is integrated into the cylinder head—the foundation for the high-performance thermal management system.
Researchers from Tampere University and the University of Eastern Finland have found that the particulate emissions of auxiliary heaters can be up to a thousand times higher than the particulate emissions of idling gasoline vehicles. Their open-access study is published in the journal Atmosphere.
FCA also plans to consolidate its small gasoline engine lineup with a new family to be launched in 2015. Much more progress will come as gasoline and diesel engine technologies converge. FCA will start the global roll out of a new small gasoline engine family in 2015 which incorporates these new and emerging technologies.
A team from Brunel University, MAHLE Powertrain and University College London studied the combined effects of different inlet valve operating strategies on combustion, performance and emissions with different ethanol and 1-butanol blends with gasoline in a single-cylinder spark-ignition research engine equipped with a fully variable valvetrain.
The researchers assessed the gaseous, particulate, and genotoxic pollutants from two current technology gasoline direct injection vehicles when tested in their original configuration and with a catalyzed gasoline particulate filter (GPF). Their study is publishedin the ACS journal Environmental Science & Technology. Johnson, David R.
HEDGE-III will investigate solutions to the primary barriers to high efficiency in gasoline engines. Southwest Research Institute (SwRI) has launched its third cooperative research program aimed at developing a high-efficiency gasoline engine for the light-duty automotive and medium-duty engine markets. Source: SwRI. Click to enlarge.
Engineers at Transonic Combustion, a start-up developing a fuel efficient supercritical (SC) fuel injection and combustion system—Transonic Combustion, or TSCi ( earlier post )—have demonstrated the TSCi process using gasoline fuel at low load without EGR, medium load with EGR, and high speed low load with EGR.
Comparison of brake thermal efficiency and specific fuel consumption at rated power (ICOMIA Mode 5), hydrogen vs. gasoline engines. This is due to raw, externally premixed fresh charge comprising air, fuel and lube oil being short-circuited into the exhaust during the scavenging process. Oh and Plante. Click to enlarge.
Operating range of 2-stroke CAI fueled with gasoline, E10 and E85. homogeneous charge compression ignition, HCCI) combustion processes offer the promise of simultaneously reducing fuel consumption and NO x emissions. To minimize the air short-circuiting rate, the intake and exhaust valve timings were adjusted. Zhang et al.
These include fully-electric systems, as well as a gasoline-generated EV system (known as e-POWER at Nissan, earlier post ) in which a gasoline engine generates electrical power stored in a battery (series hybrid), which can then be delivered to all four wheels through a pair of high-output electric motors. Earlier post.)
As part of the new technology to achieve this vision, the company disclosed plans to introduce a next-generation gasoline engine called SKYACTIV-X in 2019. This new proprietary combustion engine combines the advantages of gasoline and diesel engines to optimize environmental performance, power and acceleration performance. Yamasaki, Y.,
liter gasoline-fueled TSI of the Polo BlueGT. This combination of efficiency and dynamic performance is enabled by the systematic interplay of ACT, downsizing (reduced engine displacement plus direct injection and charging) and BlueMotion Technology (Stop/Start system, battery regeneration). The system was realized with the new 1.4-liter
Researchers at the University of Wisconsin-Madison have used computational fluid dynamics modeling to investigate cycle-to-cycle instability of homogeneous charge compression ignition (HCCI) and reactivity-controlled compression ignition (RCCI) engines—two approaches to low-temperature combustion.
Honda is developing a Homogeneous Lean Charge Spark Ignition (HLSI) combustion engine as one of the key elements in its technology roadmap for a higher thermal efficiency gasoline engine. A great deal of research has been conducted on lean burn as an effective means of increasing the efficiency of gasoline engines. Hanabusa, H.,
A new study by Dr. Gautam Kalghatgi and his colleagues at Saudi Aramco provides further support a pathway for significant improvements in the efficiency of a gasoline engine (i.e., Broadly, this approach is termed Gasoline Compression Ignition (GCI). spark ignited, SI) by running it in compression ignition mode with naphtha fuels.
Citroën is introducing the first members of its new PureTech family of three-cylinder gasoline engines on the C3, DS3 and C-Elysée (for international markets) ranges. The exhaust manifold is integrated directly in the cylinder head, which reduces the number of parts and overall weight. PureTech 3-cylinder engine. Click to enlarge.
Toyota anticipates a 1/3 full hybrid, 1/3 gasoline, 1/3 diesel engine mix. The new Auris’ powertrain line-up, which now features a choice of an improved full hybrid or two gasoline and two diesel engines offering the performance- and economy-enhancing benefits of Toyota Optimal Drive. Valvematic gasoline engine. Powertrains.
Among the technologies it is developing to improve the fuel consumption of gasoline and diesel engines, Audi is working on an electric biturbo system in which a secondary compressor boosts the main turbocharger at lower engine speeds. Turbochargers are typically driven by energy from the exhaust—i.e., Click to enlarge.
We have therefore developed a hydrogen combustion engine that aims to match the power and torque of current high-performance gasoline engines as a concept study. liter eight-cylinder gasoline engine—or rather, its digital data set, since we conducted the entire study virtually using engine performance simulations.
for XSE grade, which uses a dual-outlet exhaust). Most AWD grades have 202 hp, while the Camry XSE AWD grade has 205 hp with dual exhaust. A variable cooling system, variable oil pump and a cooled exhaust gas recirculation (EGR) system all contribute to the engine’s high thermal efficiency and outstanding fuel economy.
liter three-cylinder Ingenium gasoline engine with a 109PS (80kW) electric motor integrated into the rear axle and powered by a 15 kWh lithium-ion battery located below the rear seats. The operating strategy adapts to driving conditions and the remaining charge in the battery. The new PHEV models combine a 200PS (147kW) 1.5-liter
A study by a team at the Propulsion Systems Research Labs, GM R&D has concluded that the combustion instability of homogeneous charge compression ignition (HCCI) at the low-load range is caused by lack of oxygen concentration rather than lower in-cylinder mixture temperature. Earlier post.). 5 512-524 doi: 10.1177/1468087412463304.
The Skyactiv 2 gasoline and diesel engines will focus on improved internal combustion, said Mitsuo Hitomi, executive officer in charge of powertrain development, during a briefing at Mazda’s Yokohama technical center. The focus will be on lean burning, and increased compression ratios for the gasoline engines. Earlier post.).
mpg US) (99 g/km CO 2 )—more efficient than any previous Golf with a gasoline engine. The new TSI engine also offers the highest specific torque of any large-scale production series gasoline engines: 200 N·m per liter displacement. The turbocharged gasoline engine with its 10.5:1 The exhaust manifold of the 1.0
Volkswagen is holding media drive events this week for the sporty new 2013 Jetta Turbo Hybrid ( earlier post ), which features the second version of a Volkswagen gasoline-electric hybrid drive system: a 1.4L Volkswagen’s first gasoline-electric hybrid system—that for the Touareg Hybrid—combines a 3.3-liter Click to enlarge.
The electric biturbo system comprises a classic exhaust turbocharger (mono- or bi-turbo) working together with a supplemental, electric-powered compressor arranged in series and powered by a separate 48-volt electrical system. Note the position of the single exhaust gas turbocharger and the electrically driven compressor.
The editorial addresses important issues in the current politically charged discussions of global warming and climate-change alarm. … A transition from the gasoline or diesel ICE to a full gasoline/diesel hybrid can significantly reduce emissions. Gas exchange. Electrification. Engine thermal and energy management.
Among their findings was that E20 offers higher peak load capability and thermal efficiency than gasoline. RCCI, a dual-fuel combustion technology developed by Dr. Rolf Reitz and colleagues, is a variant of Homogeneous Charge Compression Ignition (HCCI).
Starting from a energy-based powertrain simulation model validated on experimental data from the PHEV, the researchers conducted a first- and second-law analysis to identify the potential for engine waste heat recovery, considering a variety of driving cycles and assuming the vehicle operating in charge-sustaining (HEV) mode. Skarke et al.
Achates Power, the developer of a family of two-stroke compression-ignition opposed-piston engines ( earlier post ), has been selected by APRA-E under its OPEN 2015 solicitation ( earlier post ) for an award of more than $9 million to develop a multi-cylinder opposed piston engine operating with compression ignition that uses gasoline as the fuel.
All models of the new A-Class are also powered by new diesel and gasoline engines. New, efficient gasoline and diesel engines. All the new A-Class models are powered by new, efficient engines: two new four-cylinder gasoline engines are available at market launch. Cylinder cutoff, 4-cylinder-gasoline engine M282.
The new six-cylinder in-line gasoline engine M 256 features a 48 V electrical system. The M 256 is the first member of a new family of premium gasoline engines that have for the first time been systematically designed for electrification from the outset. Mercedes-Benz is investing a total of around €3 billion (US$3.3 Click to enlarge.
The ACIS technology provides for more thorough combustion and enables advanced combustion strategies like lean burn, highly diluted mixtures and very high exhaust gas recirculation (EGR), further increasing fuel efficiency. liter turbocharged gasoline direct injection engine, and there is potential for further improvements.
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