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Exhaust system configuration. SCR coated on filter (SCR-F) allows for close coupling of an SCR (selective catalytic reduction) function for fast light off. Earlier post.). In addition, the cold start catalyst also exhibits excellent CO, HC, and NO oxidation activity under normal lean conditions.
The results represent a light-load indicated efficiency improvement of 15-30% (up to 40.9%). The test engine for the paper was a 250cc single-cylinder unit with dual-camshaft-actuated reciprocating sleeve valves for induction and exhaust. There is no ISFC improvement at high load. Click to enlarge.
Elements of the multi-mode combustion system include: Spark-ignited (SI) combustion with high compression ratio and high boost assisted by cooled external exhaust gas recirculation (EGR). Two-stage boost—a small supercharger for HCCI, and a regular turbocharger for downsizing.
Internal combustion engines have been significantly improving in the past decade, after the adoption of technologies such as Gasoline Direct Injection, mild electrification, downsizing and turbocharging. The OSU EcoCAR prototype vehicle features an extended-range electric architecture with a downsized 1.8L —Marcello Canova.
In a 2010 paper, Roger Stone, Engineering Director, Torotrak noted that conventional turbo- and supercharging technologies are more than capable of delivering the required peak power and torque levels from downsized engines but suffer from a number of. It gives the next generation of downsized powertrains ‘big-engine’ response.
Below this GVW the technology has already been acquired by Valeo as a supercharger for cars and light commercial vehicle applications. Unlike a turbocharger, Cobra is not dependent on the exhaust gases flowing to do its work. Earlier post.) The benefits of Cobra to the engine developer and end user depend on the application.
In addition to demonstrating better fuel consumption results than current advanced gasoline engines, the Omnivore engine has successfully demonstrated homogeneous charge compression ignition (HCCI) down to extremely light loads. Jamie Turner, Chief Engineer of Powertrain Research at Lotus Engineering. Displacement. Compression ratio.
Use of ethanol, methanol or alcohol mixtures could be particularly attractive for heavy duty vehicles because of the need for cleaner engines than present diesel engines and a less demanding infrastructure requirement than that for light duty vehicles. More modest downsizing up to 5 liters could offer a practical solution.
This trend of increasing demand for higher octane gasoline is likely driven by changes in fuel requirements for light-duty vehicles (LDV) in response to increasing fuel economy standards, which will have widespread implications for future gasoline markets, according to EIA analysts.
Weighing 220 kilograms (485 lb) including all key add-on parts, the V8 is comparatively light. Audi’s principle of downsizing: “ Forced induction replaces displacement ” One twin-scroll turbocharger per cylinder bank compresses the fresh air. Even at 1,000 rpm, the 4.0
Reducing the number of exhaust gas particulates, including those smaller than 23 nm, will help manufacturers meet increasingly stringent future global emissions standards. Reducing engine-out emissions cuts tailpipe emissions in the crucial period before catalyst light-off and reduces the need for costly aftertreatment systems.
With an innovative new sealing system and a new, downsized plunger, Delphi Technologies’ high-efficiency fuel pump delivers the increased pressures needed without increasing the load on the on the engine’s camshaft. Left: GDi 500+ injector. Right: GDi 500+ fuel pump. —Walter Piock, chief engineer, Delphi Technologies.
The engine should yield fuel efficiency gains of more than 50% compared to a downsized, turbo-charged gasoline direct injection engine, while reducing the overall cost of the powertrain system, said Fabien Redon, Vice President, Technology Development at Achates Power. Earlier post.) Earlier post.). Earlier post.).
Develop and demonstrate technologies including engine downsizing, electrification of auxiliary systems such as oil and water pumps, waste heat recovery, improved aerodynamics and hybridization. Advanced Technology Powertrains for Light-Duty Vehicles (ATP-LD). 38,831,115. Daimler Trucks North America, LLC. 39,559,868. Navistar, Inc.
The Lotus Range Extender engine features an innovative architecture comprising an aluminum monoblock construction, integrating the cylinder block, cylinder head and exhaust manifold in one casting. Integrated Exhaust Manifold. An integrated exhaust manifold has potential to: Reduce parts count: 18 fewer components resulting.
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. PSA has filed for two patents on its work. PSA concept D-EGR engine.
Future RDE emissions legislation and fleet average CO 2 targets represent a challenge for automakers wishing to provide cost-effective light duty diesel vehicles. The introduction of RDE regulations in Europe represents a very significant challenge, particularly for those automakers offering light duty diesel products.
Based on a Ford Focus, this ADEPT prototype incorporates a 48V electrical architecture, a SpeedStart 10kW (later to be upgraded to 12.5kW) belt integrated starter generator and TIGERS turbine integrated exhaust gas energy recovery system, both switched reluctance machines supplied by CPT, and an advanced lead carbon battery pack provided by EALABC.
Automakers are turning to downsized turbocharged engines to satisfy more stringent global fuel economy and emission regulations and customer demand for better-performing vehicles. In addition to improving fuel efficiency, downsized turbocharged engines also reduce harmful exhaust emissions.
The second-generation HECS has been adapted to a downsized 1.6L The HECS concept incorporates split cooling, and an air gap insulated exhaust gas manifold, which generally contributes to improved aftertreatment functionality, and especially during cold start to achieve early catalyst light-off.
In keeping with the trend to downsizing, Hyundai has been expanding the application of Turbo Gasoline Direct Injection (T-GDI) engines. Hyundai will continue its efforts to develop light-weight and fuel-efficient transmissions. Transmissions.
To achieve the target fuel economy improvement over the baseline V6 configuration, the team used GTDI technology for downsizing in combination with part-load lean homogeneous charge compression ignition (HCCI) operation for further fuel economy gains. Earlier post.). The project team is replacing a 3.6L I4 Ecotec engine. Wheeler, J.,
Compared to new diesel engines, the Delphi team found that BSFC for GDCI at light loads was comparable or better, and at high loads was about 5% higher. Due to the lower exhaust enthalpy of lower temperature engines using PPCI, it is difficult to produce intake boost with acceptable boost system parasitis. —Sellnau et al.
To address this request, the NRC formed the Committee on the Assessment of Technologies for Improving Light-Duty Vehicle Fuel Economy. Spark-ignition (SI) engines will continue to be the primary source of propulsion for light-duty vehicles in the United States over the time frame of the report (next 15 years).
Continuously variable camshaft phasers for both the intake and exhaust enabled variable valve timing. Standard production intake and exhaust profiles were retained. bar IMEP), corresponding to an exhaust lambda in excess of two. —Attard et al.
to eliminate turbo lag—in support of aggressive engine downsizing. CPT recommends a combination of the highly dynamic electric supercharger in series with a conventional exhaust-driven turbocharger to optimize the overall response of the system, compared to other air charging methods. Boost pressure is directly controlled by the ECU.
As a result of continuous engine downsizing, particularly in the compact car segment, temperatures under the hood are going up, putting extra demands on plastics components used in this area. It will enable car makers to save costs and improve fuel efficiency through light weighting.
Continental will present an innovative close-coupled annular catalytic converter that supports near-complete NO x conversion in downsized turbocharged gasoline engines at the 37 th Vienna Motor Symposium next week. Markus Distelhoff, Executive Vice President Fuel & Exhaust Management Business Unit in Continental’s Powertrain Division.
Additionally, suggested one of the speakers, advanced SIDI (spark-ignited, direct-injection) engines can take light-duty market share back from diesels in Europe based on the same trends. don’t think we expect to see a large market share of light duty diesel in the short term. SULEV/Tier 2 Bin 2 is the target. smog and particulates.
The work of the consortium will be structured into a series of modules, the first of which will focus on the effect of downsizedlight duty gasoline and diesel engine technologies on lubricant soot levels and engine wear. The drive towards thinner, lower viscosity lubricants for reduced friction.
Since 2010, all Sprinters in the US have been powered by BlueTEC diesel engines, marking the first use of BlueTEC technology, with its selective catalytic reduction (SCR) exhaust aftertreatment system, in the commercial van market here. The two overhead camshafts actuate 16 intake and exhaust valves.
GMZ Energy and its partners are on track to deliver a 1 kW thermoelectric generator (TEG) for the Bradley Fighting Vehicle as well as to design and to integrate a light-duty vehicle TEG into a Honda Accord as part of a DOE-funded project. down-speeding, downsized engine, etc.), Click to enlarge.
The more efficient combustion engine technologies, with their enabling of downsizing, come in compatibly with hybridization, with hybridization and electrification playing a larger role over time. The further downsized next-generation technologies can be very synergistic within hybrid applications. Planning background.
Early versions of direct injection employed a stratified injection strategy which included late fuel injection and charge air motion to produce a stoichiometric air/fuel mixture in the vicinity of the spark plug and, thereby, avoid pumping losses from the need to throttle the engine at light load. —Maricq et al. Click to enlarge.
The current decline is ales of diesel light duty vehicle in Europe does not put EU CO 2 targets out of reach of automakers, according to a new analysis by the International Council on Clean Transportation (ICCT). For instance, hybrid electric vehicles and diesel cars in the small (e.g., Renault Clio) and lower medium (e.g.,
Southwest Research Institute (SwRI) has successfully demonstrated that its HEDGE (High-Efficiency, Dilute Gasoline Engine) technology, using cooled exhaust gas recirculation (EGR) and advanced ignition systems, suppresses low-speed pre-ignition in turbocharged gasoline direct-injection engines. Earlier post.).
A new stage in the PSA Peugeot Citroën Group’s downsizing strategy, this new generation of engine block delivers a reduction of fuel consumption and CO 2 emissions, while offering a good level of performance for the entry-level versions. The 208 also introduces a new range of 3-cylinder gasoline engines, 1.0- mpg US or 4.3 208 gasoline range.
On 15 Sep, NHTSA and the US EPA proposed a joint rulemaking on fuel economy and greenhouse gas emissions for light duty vehicles: an average new car 34.1 Three of the NHTSA scenarios for penetration of technologies for light trucks for MY 2016. Data: Preliminary Regulatory Impact Analysis. Click to enlarge. Click to enlarge.
Conflicting evidence does not support making a firm conclusion on the fuel consumption benefit of catalysed Exhaust Gas Recirculation (EGR), according to a review of current studies by a team at the University of Bath (UK). According to the review, the conversion of HCs, CO, and NO in the exhaust gas by the catalyst can result in up to a 4.5%
Polycyclic aromatic hydrocarbons (PAHs) and nitrated PAHs were quantified in both the vapor and particle phases of the PM, with the GPF-equipped vehicles practically eliminating most of these species in the exhaust. liter downsized turbocharged centrally-mounted direct injection engine. The first was equipped with a 2.0-liter
“People downsize cars, not expectations. Customers are increasingly making decisions to downsize driven by lifestyle and fuel economy. We’ve learned that when customers downsize, they still want the amenities they’ve become used to in larger vehicles.”
Fiesta features Twin Independent Variable Camshaft Timing (Ti-VCT) ( earlier post ) which allows the engine to be downsized for fuel economy while continuously optimizing camshaft phasing for throttle response, performance and flexibility. The block, cylinder head and oil pan—traditionally the heaviest engine components—are aluminum castings.
the Worldwide harmonized Light vehicles Test Procedures (WLTP). This means that in addition the power demand is more difficult to achieve with engine downsizing and transmission down-speeding alone. The EU goal is to introduce the WLTP by 2017 if possible and no later than 2020 to coincide with the 95 g/km requirement. The conference.
Although real-world fuel economy improvements from GDI technology alone are close to 1.5%, they can reach 8% by downsizing and turbocharging the engine, which can be achieved on GDI engines without loss of power compared to PFI engines. Finally, we analyze the potential climate effects of switching a PFI to a GDI fleet. —Saliba et al.
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