نتایج جستجو برای: start of injection (soi)

تعداد نتایج: 21179052  

Journal: :international journal of automotive engineering 0
a.h kakaee p. rahnama a. paykani

in this paper, a numerical study is performed to provide the combustion and emission characteristics resulting from fuel-reactivity controlled compression ignition (rcci) combustion mode in a heavy-duty, single-cylinder diesel engine with gasoline and diesel fuels. in rcci strategy in-cylinder fuel blending is used to develop fuel reactivity gradients in the combustion chamber that result in a ...

In this work, a novel Silicon on Insulator (SOI) MOSFET is proposed and investigated. The drain and source electrode structures are optimized to enhance ON-current while global device temperature and hot carrier injection are decreased. In addition, to create an effective heat passage from channel to outside of the device, a silicon region has embedded in the buried oxide. In order to reduce th...

2015
Prashanth Kumar Karra Terry Meyer Michael Olsen Hui Hu Stuart Birrell

The objective of this research was to develop advanced diesel combustion strategies for emissions reduction in a multi-cylinder diesel engine. The engine was equipped with an electronically-controlled, common-rail fuel injection system, and an exhaust gas recirculation (EGR) system. This experimental setup allowed a wide range of operating conditions to be explored. Effects of various injector ...

Journal: :Energies 2021

The effects of two pilot injections on combustion and emissions were evaluated in a single−cylinder turbocharged diesel engine, which operated premixed charge compression ignition (PCCI) modes with multiple heavy exhaust gas recirculation under the low load by experiments simulation. It was revealed that delay start first injection (SOI−P1) or advance second (SOI−P2), respectively, pressure, he...

Small diesel engines are widely used for commercial vehicle and passenger car applications due to their higher torque requirements, fuel economy, and better thermal efficiency. These engines are exposed to different operating and environmental conditions and hence emissions from these engines are erratic. Strategies are required to enhance performance and reduce engine-out emissions considering...

Journal: :Energies 2021

Reactivity control compression ignition engines illustrated suitable abilities in emission reduction beside high thermal efficiency. In this research, nine various direct fuel injection strategies were studied numerically: three cases with single strategy and six split different start of (SOI). all simulated cases, equivalence ratio kept constant (i.e., 0.3). Among strategies, showed higher IME...

Journal: :Processes 2022

Hydrogen, as a suitable and clean energy carrier, has been long considered primary fuel or in combination with other conventional fuels such gasoline diesel. Since the density of hydrogen is very low, port fuel-injection configuration, engine’s volumetric efficiency reduces due to replacement by intake air. Therefore, direct in-cylinder injection (injection after valve closes) can be solution f...

Journal: :Fuel 2021

This study was aimed to explore the effects of different post-injection parameters on cracking, formation mechanism, composition, and carbon atoms distribution exhaust hydrocarbon (HC) compounds diesel engine. The influence three fuel masses (PIM) six dwell duration with start injection (SOI) timings were assessed an operating speed 1000 rpm a basic engine load 0.5 MPa. Post-injection strategy ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تبریز 0

a semi-empirical mathematical model for predicting physical part of ignition delay period in the combustion of direct - injection diesel engines with swirl is developed . this model based on a single droplet evaporation model . the governing equations , namely , equations of droplet motion , heat and mass transfer were solved simultaneously using a rung-kutta step by step unmerical method . the...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تربیت مدرس - پژوهشکده مهندسی فرایند 1395

abstract: mineral scaling in oil and gas production equipment is one of the most important problem that occurs while water injection and it has been recognized to be a major operational problem. the incompatibility between injected and formation waters may result in inorganic scale precipitation in the equipment and reservoir and then reduction of oil production rate and water injection rate. ...

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