Development Of The High Pressure Direct Injected Ultra Low No Subscript X Natural Gas Engine
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Development Of The High Pressure Direct Injected Ultra Low No Subscript X Natural Gas Engine
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Author : Vinod K. Duggal
language : en
Publisher:
Release Date : 2004
Development Of The High Pressure Direct Injected Ultra Low No Subscript X Natural Gas Engine written by Vinod K. Duggal and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with Diesel motors categories.
Development Of The High Pressure Direct Injected Ultra Low Nox Natural Gas Engine
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Author :
language : en
Publisher:
Release Date : 2004
Development Of The High Pressure Direct Injected Ultra Low Nox Natural Gas Engine written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with categories.
Subcontractor report details work done by Cummins and Westport Innovations to develop a heavy-duty, low-NOx, high-pressure direct-injection natural gas engine for the Next Generation Natural Gas Vehicle activity.
Development Of A Direct Injected Natural Gas Engine System For Heavy Duty Vehicles
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Author :
language : en
Publisher:
Release Date : 2000
Development Of A Direct Injected Natural Gas Engine System For Heavy Duty Vehicles written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2000 with categories.
The transportation sector accounts for approximately 65% of US petroleum consumption. Consumption for light-duty vehicles has stabilized in the last 10--15 years; however, consumption in the heavy-duty sector has continued to increase. For various reasons, the US must reduce its dependence on petroleum. One significant way is to substitute alternative fuels (natural gas, propane, alcohols, and others) in place of petroleum fuels in heavy-duty applications. Most alternative fuels have the additional benefit of reduced exhaust emissions relative to petroleum fuels, thus providing a cleaner environment. The best long-term technology for heavy-duty alternative fuel engines is the 4-stroke cycle, direct injected (DI) engine using a single fuel. This DI, single fuel approach maximizes the substitution of alternative fuel for diesel and retains the thermal efficiency and power density of the diesel engine. This report summarizes the results of the first year (Phase 1) of this contract. Phase 1 focused on developing a 4-stroke cycle, DI single fuel, alternative fuel technology that will duplicate or exceed diesel power density and thermal efficiency, while having exhaust emissions equal to or less than the diesel. Although the work is currently on a 3500 Series DING engine, the work is viewed as a basic technology development that can be applied to any engine. Phase 1 concentrated on DING engine component durability, exhaust emissions, and fuel handling system durability. Task 1 focused on identifying primary areas (e.g., ignition assist and gas injector systems) for future durability testing. In Task 2, eight mode-cycle-averaged NO(subscript x) emissions were reduced from 11.8 gm/hp-hr (baseline conditions) to 2.5 gm/hp-hr (modified conditions) on a 3501 DING engine. In Task 3, a state-of-the-art fuel handling system was identified.
Development Of The High Pressure Direct Injection Isx G Natural Gas Engine
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Author :
language : en
Publisher:
Release Date : 2004
Development Of The High Pressure Direct Injection Isx G Natural Gas Engine written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with categories.
Fact sheet details work by Cummins and Westport Innovations to develop a heavy-duty, low-NOx, high-pressure direct-injection natural gas engine for the Next Generation Natural Gas Vehicle activity.
Development Of The High Pressure Direct Injection Isx G Natural Gas Engine
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Author :
language : en
Publisher:
Release Date : 2004
Development Of The High Pressure Direct Injection Isx G Natural Gas Engine written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with categories.
Fact sheet details work by Cummins and Westport Innovations to develop a heavy-duty, low-NOx, high-pressure direct-injection natural gas engine for the Next Generation Natural Gas Vehicle activity.
Characterization Of The Effects Of Ducted Fuel Injection In A Compression Ignition Engine
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Author : Christopher William Nilsen
language : en
Publisher:
Release Date : 2020
Characterization Of The Effects Of Ducted Fuel Injection In A Compression Ignition Engine written by Christopher William Nilsen and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020 with categories.
Ducted fuel injection (DFI) has been proposed as a strategy to enhance the fuel/charge-gas mixing within the combustion chamber of a direct-injection mixing-controlled compression-ignition engine. The concept involves injecting each fuel spray through a small tube within the combustion chamber to facilitate the creation of a leaner mixture in the autoignition zone, relative to a conventional free-spray configuration (i.e., a fuel spray that is not surrounded by a duct). This dissertation investigates the effects of ducted fuel injection on engine-out emissions and efficiency with two-orifice and four-orifice injector tips across a wide range of conditions. A numerical study contributes to the understanding of the fluid flow effects of DFI. The experiments in chapter two use a two-orifice fuel injector to test two duct configurations relative to conventional diesel combustion. The result is that DFI is confirmed to be effective at curtailing engine-out soot emissions. It also breaks the tradeoff between emissions of soot and nitrogen oxides (NO[subscript x]) by simultaneously attenuating soot and NO[subscript x] with increasing dilution. The third chapter expands on the second by comparing ducted fuel injection to conventional diesel combustion over a wide range of operating conditions and at higher loads (up to 8.7 bar gross indicated mean effective pressure) with a four-orifice fuel injector. This chapter is achieved through sweeps of intake-oxygen mole-fraction, injection duration, intake pressure, start of combustion timing, fuel-injection pressure, and intake temperature. Ducted fuel injection is shown to curtail engine-out soot emissions at all tested conditions. Under certain conditions, ducted fuel injection can attenuate engine-out soot by over a factor of 100. In addition to producing significantly lower engine-out soot emissions, ducted fuel injection enables the engine to be operated at low-NO[subscript x] conditions that are not feasible with conventional diesel combustion due to high soot emissions. The fourth chapter explores 1.1 bar IMEP[subscript g] (low load) conditions and 10 bar IMEP[subscript g] (higher-load) conditions with the same four-orifice fuel injector as in chapter three. DFI and CDC are directly compared at each operating point in the study. At the idle condition, the intake dilution was swept to elucidate the soot and NO[subscript x] performance of DFI in this new load range. This expands the range of conditions over which DFI has been shown to attenuate soot formation. It also shows that DFI enables low-NO[subscript x], low-load operation that is not achievable with CDC due to excessive soot formation at high dilution levels. The fifth chapter uses a numerical model to develop the understanding of the fluid flow effects of DFI. This enabled studies of entrainment and mixing that would have been much more challenging to do in an experiment. This showed that DFI enhances charge gas entrainment before the duct and blocks entrainment inside of the duct. Mixing is enhanced by the duct, which resulted in lower peak equivalence ratios at the end of the duct.
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Author :
language : en
Publisher:
Release Date : 19??
written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 19?? with categories.
Emission And Performance Comparison Of The Natural Gas C Gas Plus Engine In Heavy Duty Trucks
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Author :
language : en
Publisher:
Release Date : 2003
Emission And Performance Comparison Of The Natural Gas C Gas Plus Engine In Heavy Duty Trucks written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003 with categories.
Subcontractor report details results of on-road development and emissions characteristics of C-Gas Plus natural gas engine in Viking Freight heavy duty trucks. The objective of this project was to develop, on road and in service, a natural gas truck/bus engine (the C-Gas Plus) with higher horsepower, lower cost, and better performance and diagnostics than the previous C8.3G natural gas engine. The engine was to have an advanced engine management control system to enable implementation of proven technologies that improve engine performance and power density (hp/L). The C-Gas Plus engine was designed to meet the following objectives: (1) Higher engine ratings (280 hp and 850 ft-lb torque for the C-Gas Plus) than the C8.3G natural gas engine; (2) Lower capital cost than the C8.3G engine; and (3) Low emission standards: California Air Resources Board (CARB) low-NO(subscript x) (oxides of nitrogen) (2.0 g/bhp-h) and U.S. Environmental Protection Agency (EPA) Clean Fuel Fleet Program ultra-low emission vehicle (ULEV) emission certifications.
Development Of A Direct Injected Natural Gas Engine System For Heavy Duty Vehicles
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Author :
language : en
Publisher:
Release Date : 2000
Development Of A Direct Injected Natural Gas Engine System For Heavy Duty Vehicles written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2000 with categories.
This report summarizes the results of Phase 2 of this contract. The authors completed four tasks under this phase of the subcontract. (1) They developed a computational fluid dynamics (CFD) model of a 3500 direct injected natural gas (DING) engine gas injection/combustion system and used it to identify DING ignition/combustion system improvements. The results were a 20% improvement in efficiency compared to Phase 1 testing. (2) The authors designed and procured the components for a 3126 DING engine (300 hp) and finished assembling it. During preliminary testing, the engine ran successfully at low loads for approximately 2 hours before injector tip and check failures terminated the test. The problems are solvable; however, this phase of the program was terminated. (3) They developed a Decision & Risk Analysis model to compare DING engine technology with various other engine technologies in a number of commercial applications. The model shows the most likely commercial applications for DING technology and can also be used to identify the sensitivity of variables that impact commercial viability. (4) MVE, Inc., completed a preliminary design concept study that examines the major design issues involved in making a reliable and durable 3,000 psi LNG pump. A primary concern is the life of pump seals and piston rings. Plans for the next phase of this program (Phase 3) have been put on indefinite hold. Caterpillar has decided not to fund further DING work at this time due to limited current market potential for the DING engine. However, based on results from this program, the authors believe that DI natural gas technology is viable for allowing a natural gas-fueled engine to achieve diesel power density and thermal efficiency for both the near and long terms.
Development Of A Direct Injected Natural Gas Engine System For Heavy Duty Vehicles
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Author : Caterpillar Inc
language : en
Publisher:
Release Date : 2000
Development Of A Direct Injected Natural Gas Engine System For Heavy Duty Vehicles written by Caterpillar Inc and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2000 with Buses categories.