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Common Rail System for GDI Engines
58,84 € *
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Progressive reductions in vehicle emission requirements have forced the automotive industry to invest in research and development of alternative control strategies. Continual control action exerted by a dedicated electronic control unit ensures that best performance in terms of pollutant emissions and power density is married with driveability and diagnostics. Gasoline direct injection (GDI) engine technology is a way to attain these goals.This brief describes the functioning of a GDI engine equipped with a common rail (CR) system, and the devices necessary to run test-bench experiments in detail. The text should prove instructive to researchers in engine control and students are recommended to this brief as their first approach to this technology. Later chapters of the brief relate an innovative strategy designed to assist with the engine management system, injection pressure regulation for fuel pressure stabilization in the CR fuel line is proposed and validated by experiment. The resulting control scheme is composed of a feedback integral action and a static model-based feed-forward action, the gains of which are scheduled as a function of fundamental plant parameters. The tuning of closed-loop performance is supported by an analysis of the phase-margin and the sensitivity function. Experimental results confirm the effectiveness of the control algorithm in regulating the mean-value rail pressure independently from engine working conditions (engine speed and time of injection) with limited design effort.

Anbieter: Dodax
Stand: 25.01.2020
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Mitsubishi 8A8 engine
35,00 € *
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High Quality Content by WIKIPEDIA articles! The Mitsubishi 8A8 engine is a range of V8 powerplants produced by Mitsubishi Motors since 1999. The only variant to date is the 8A80, a 4.5 L with double overhead camshafts and gasoline direct injection (GDI) technology. Financial pressures forced the company to discontinue sales of the Proudia and Dignity, the only vehicles in its range to which it was fitted, after only fifteen months. However, the two vehicles were developed in partnership with the Hyundai Motor Company of South Korea, with whom Mitsubishi has had a longstanding relationship.[3] While Mitsubishi makes the cylinder heads and other GDI-related equipment, Hyundai casts the aluminium block, and other major internal components. Hyundai's version of the Proudia/Dignity, the Equus, proved more successful, and this has been the sole application of the powerplant since 2001. Hyundai replaced the engine with its newly developed Tau V8 in 2008 when the second generation rear wheel drive Equus replaced the first model.

Anbieter: Dodax AT
Stand: 25.01.2020
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Soot Formation of Gasoline Surrogate Components...
45,80 € *
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Stringent emission regulations aim to restrict soot emissions by particle mass and particle number in the transport sector. Whilst the concept of direct-injection gasoline (GDI) engines is very promising with respect to efficiency, complying with the legislative soot emission limits is challenging for GDI-engines. A sufficient reduction of soot emissions in GDI engines requires a detailed understanding and accurate modeling of soot formation processes of gasoline fuels in engines. This study provides fundamental investigations of the soot formation process of common gasoline surrogate components.Soot volume fraction profiles in laminar counterflow flames burning ethylene, n-heptane, iso-octane, and toluene were determined experimentally for a wide range of flame conditions. Simulations of these flames reveal that applied models are capable of predicting the soot volume fraction with remarkable accuracy for ethylene. For the gasoline surrogate components, however, the overall soot volume fractions are overpredicted. Reaction pathway analysis suggests that, in these flames, more soot precursors are formed via the reaction pathways involving fuel pyrolysis products.Furthermore, flame structure, local gas temperature, local soot volume fraction, and primary soot particle diameter were simultaneously detected by means of optical diagnostics in turbulent toluene flames. Joint statistics of flame and soot properties indicate that, due to differential diffusion of soot, high soot concentrations are present at conditions of low temperatures and low OH concentrations. In the soot oxidation region, the presence of large particles suggest that the oxidation is not sufficiently fast to burn soot completely.

Anbieter: Dodax AT
Stand: 25.01.2020
Zum Angebot
Mitsubishi 8A8 engine
34,00 € *
ggf. zzgl. Versand

High Quality Content by WIKIPEDIA articles! The Mitsubishi 8A8 engine is a range of V8 powerplants produced by Mitsubishi Motors since 1999. The only variant to date is the 8A80, a 4.5 L with double overhead camshafts and gasoline direct injection (GDI) technology. Financial pressures forced the company to discontinue sales of the Proudia and Dignity, the only vehicles in its range to which it was fitted, after only fifteen months. However, the two vehicles were developed in partnership with the Hyundai Motor Company of South Korea, with whom Mitsubishi has had a longstanding relationship.[3] While Mitsubishi makes the cylinder heads and other GDI-related equipment, Hyundai casts the aluminium block, and other major internal components. Hyundai's version of the Proudia/Dignity, the Equus, proved more successful, and this has been the sole application of the powerplant since 2001. Hyundai replaced the engine with its newly developed Tau V8 in 2008 when the second generation rear wheel drive Equus replaced the first model.

Anbieter: Dodax
Stand: 25.01.2020
Zum Angebot
Soot Formation of Gasoline Surrogate Components...
45,80 € *
ggf. zzgl. Versand

Stringent emission regulations aim to restrict soot emissions by particle mass and particle number in the transport sector. Whilst the concept of direct-injection gasoline (GDI) engines is very promising with respect to efficiency, complying with the legislative soot emission limits is challenging for GDI-engines. A sufficient reduction of soot emissions in GDI engines requires a detailed understanding and accurate modeling of soot formation processes of gasoline fuels in engines. This study provides fundamental investigations of the soot formation process of common gasoline surrogate components.Soot volume fraction profiles in laminar counterflow flames burning ethylene, n-heptane, iso-octane, and toluene were determined experimentally for a wide range of flame conditions. Simulations of these flames reveal that applied models are capable of predicting the soot volume fraction with remarkable accuracy for ethylene. For the gasoline surrogate components, however, the overall soot volume fractions are overpredicted. Reaction pathway analysis suggests that, in these flames, more soot precursors are formed via the reaction pathways involving fuel pyrolysis products.Furthermore, flame structure, local gas temperature, local soot volume fraction, and primary soot particle diameter were simultaneously detected by means of optical diagnostics in turbulent toluene flames. Joint statistics of flame and soot properties indicate that, due to differential diffusion of soot, high soot concentrations are present at conditions of low temperatures and low OH concentrations. In the soot oxidation region, the presence of large particles suggest that the oxidation is not sufficiently fast to burn soot completely.

Anbieter: Dodax
Stand: 25.01.2020
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1 Bit Full Adder Cell for reducing low leakage ...
50,40 € *
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As technology scales into the nanometer regime leakage current, active power, delay and area are the important metric for the analysis and design of complex arithmetic logic circuits. In this paper, low leakage 1bit full adder cell are proposed for mobile applications and a novel technique has been introduced with improved staggered phase damping technique and also Gated Diffusion Input (GDI) technique for further reduction in the Active power. Leakage power is being estimated when the circuits are connected with a sleep transistor, Further compared to the Base case and Design1 and Design2 and GDI Technique when a circuit is connected to sleep transistor. We introduced a new transistor resizing approach for 1bit full adder cells to determine the optimal sleep transistor size which reduce the leakage power and Area. The simulation results depicts that the proposed design also leads to efficient 1bit full adder cells in terms of standby leakage power, active power. We have performed simulations using Microwind 90nm standard CMOS technology at room temperature with supply voltage of 1V.

Anbieter: Dodax AT
Stand: 25.01.2020
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1 Bit Full Adder Cell for reducing low leakage ...
49,00 € *
ggf. zzgl. Versand

As technology scales into the nanometer regime leakage current, active power, delay and area are the important metric for the analysis and design of complex arithmetic logic circuits. In this paper, low leakage 1bit full adder cell are proposed for mobile applications and a novel technique has been introduced with improved staggered phase damping technique and also Gated Diffusion Input (GDI) technique for further reduction in the Active power. Leakage power is being estimated when the circuits are connected with a sleep transistor, Further compared to the Base case and Design1 and Design2 and GDI Technique when a circuit is connected to sleep transistor. We introduced a new transistor resizing approach for 1bit full adder cells to determine the optimal sleep transistor size which reduce the leakage power and Area. The simulation results depicts that the proposed design also leads to efficient 1bit full adder cells in terms of standby leakage power, active power. We have performed simulations using Microwind 90nm standard CMOS technology at room temperature with supply voltage of 1V.

Anbieter: Dodax
Stand: 25.01.2020
Zum Angebot
Implementation of Circuit Using M-GDI Technology
47,20 € *
ggf. zzgl. Versand

MGDI technique, in which a low number of transistors are used to reduce the power consumption and area on chip of digital circuits. In this paper the full adder is introduced using MGDI technique. 2 bit comparator, full subtractor were introduced using GDI technique. Then these digital circuits were compared with traditional CMOS transistors in terms of power dissipation, number of transistors, area, speed and delay.

Anbieter: Dodax AT
Stand: 25.01.2020
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Implementation of Circuit Using M-GDI Technology
45,90 € *
ggf. zzgl. Versand

MGDI technique, in which a low number of transistors are used to reduce the power consumption and area on chip of digital circuits. In this paper the full adder is introduced using MGDI technique. 2 bit comparator, full subtractor were introduced using GDI technique. Then these digital circuits were compared with traditional CMOS transistors in terms of power dissipation, number of transistors, area, speed and delay.

Anbieter: Dodax
Stand: 25.01.2020
Zum Angebot