Experimental Investigation of CAI Combustion in a Two-stroke Poppet Valve DI Engine PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download Experimental Investigation of CAI Combustion in a Two-stroke Poppet Valve DI Engine PDF full book. Access full book title Experimental Investigation of CAI Combustion in a Two-stroke Poppet Valve DI Engine by Yan Zhang. Download full books in PDF and EPUB format.
Author: Yan Zhang
Publisher:
ISBN:
Category :
Languages : en
Pages :
Get Book Here
Book Description
Author: Yan Zhang
Publisher:
ISBN:
Category :
Languages : en
Pages :
Get Book Here
Book Description
Author: Haofan Zhang
Publisher:
ISBN:
Category :
Languages : en
Pages :
Get Book Here
Book Description
A new dual fuel Controlled Auto-Ignition (CA!) combustion concept was proposed and researched for lower exhaust emissions and better fuel economy. The concept takes the advantage of the complementary physical and chemical properties of high octane number gasoline and high cetane number Di-Methyl Ether (DME) to organize the combustion process. Homogeneous gasoline/air mixture is utilized as the main combustible charge, which is realised by a low-cost Port Fuel Injection (PFI) system. Pressurised DME is directly injected into cylinder via a commercial Gasoline Direct Injection (GDI) injector. Flexible DME injection strategies are employed to realise the controlled auto ignition of the premixed charge. The engine is operated at Wide Open Throttle (WOT) in the entire operating region in order to minimize the intake pumping loss. Engine load is controlled by varying the amount of internal Exhaust Gas Recirculation (iEGR) which is achieved and adjusted by Positive Valve Overlap (PVO) and/or exhaust back pressure, and exhaust re- breathing method. The premixed mixture can be of either stoichiometric air/fuel ratio or fuel lean mixture and is heated and diluted by recycled exhaust gases. The use of internal EGR is considered as a very effective method to initiate CAI combustion due to its heating effect and moderation of the heat release rate by its dilution effect. In addition, the new combustion concept is compared to conventional SI combustion. The results indicate that the new combustion concept has potential for high efficiency, low emissions, enlargement of the engine operational region and flexible control of CAI combustion.
Author: Macklini Dalla Nora
Publisher:
ISBN:
Category :
Languages : en
Pages :
Get Book Here
Book Description
Author: Nikos P. Brouzos
Publisher: LAP Lambert Academic Publishing
ISBN: 9783659743061
Category :
Languages : en
Pages : 256
Get Book Here
Book Description
A single cylinder, air-assisted gasoline direct injection engine was used to investigate the factors affecting CAI combustion. CAI was achieved by residual gas trapping using low-lift short duration camshafts and early closing of the exhaust valves. The effects of EVC (Exhaust Valve Closure) and IVO (Inlet Valve opening) timings, spark timing, single and split injection timings, coolant temperature, compression ratio, cam lift and duration on emissions and CAI operation were investigated experimentally. Results show that EVC timing, compression ratio, cam lift and duration had significant influence on CAI combustion and emissions. Coolant temperature was revealed to have substantial impact on CAI combustion at coolant temperature below 65 degrees. Results also showed the importance of injection timing and especially split injection that enabled the extension of CAI range in both stoichiometric and lean conditions. Furthermore, CAI operation range was extended via fuel injection during recompression. All the above clearly suggest that optimising injection timing and using split injection is an effective way to control and extend CAI operation in a direct injection gasoline engine.
Author: SAE-China
Publisher: Springer Science & Business Media
ISBN: 3642337503
Category : Technology & Engineering
Languages : en
Pages : 558
Get Book Here
Book Description
Proceedings of the FISITA 2012 World Automotive Congress are selected from nearly 2,000 papers submitted to the 34th FISITA World Automotive Congress, which is held by Society of Automotive Engineers of China (SAE-China ) and the International Federation of Automotive Engineering Societies (FISITA). This proceedings focus on solutions for sustainable mobility in all areas of passenger car, truck and bus transportation. Volume 2: Advanced Internal Combustion Engines (II) focuses on: •Flow and Combustion Diagnosis •Engine Design and Simulation •Heat Transfer and Waste Heat Reutilization •Emission Standard and International Regulations Above all researchers, professional engineers and graduates in fields of automotive engineering, mechanical engineering and electronic engineering will benefit from this book. SAE-China is a national academic organization composed of enterprises and professionals who focus on research, design and education in the fields of automotive and related industries. FISITA is the umbrella organization for the national automotive societies in 37 countries around the world. It was founded in Paris in 1948 with the purpose of bringing engineers from around the world together in a spirit of cooperation to share ideas and advance the technological development of the automobile.
Author: Scott R. Miles
Publisher:
ISBN:
Category :
Languages : en
Pages : 266
Get Book Here
Book Description
Author: Institution of Mechanical Engineers
Publisher: Woodhead Publishing
ISBN: 178242184X
Category : Technology & Engineering
Languages : en
Pages : 263
Get Book Here
Book Description
This book presents the papers from the Internal Combustion Engines: Performance, fuel economy and emissions held in London, UK. This popular international conference from the Institution of Mechanical Engineers provides a forum for IC engine experts looking closely at developments for personal transport applications, though many of the drivers of change apply to light and heavy duty, on and off highway, transport and other sectors. These are exciting times to be working in the IC engine field. With the move towards downsizing, advances in FIE and alternative fuels, new engine architectures and the introduction of Euro 6 in 2014, there are plenty of challenges. The aim remains to reduce both CO2 emissions and the dependence on oil-derivate fossil fuels whilst meeting the future, more stringent constraints on gaseous and particulate material emissions as set by EU, North American and Japanese regulations. How will technology developments enhance performance and shape the next generation of designs? The book introduces compression and internal combustion engines’ applications, followed by chapters on the challenges faced by alternative fuels and fuel delivery. The remaining chapters explore current improvements in combustion, pollution prevention strategies and data comparisons. Presents the latest requirements and challenges for personal transport applications Gives an insight into the technical advances and research going on in the IC Engines field Provides the latest developments in compression and spark ignition engines for light and heavy-duty applications, automotive and other markets
Author: Nikolaos Brouzos
Publisher:
ISBN:
Category :
Languages : en
Pages :
Get Book Here
Book Description
Author: R. Edward Kelsey
Publisher:
ISBN:
Category : Automobiles
Languages : en
Pages : 11
Get Book Here
Book Description
Author: Hua Zhao
Publisher: CRC Press
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 562
Get Book Here
Book Description
Homogeneous charge compression ignition (HCCI)/controlled auto-ignition (CAI) has emerged as one of the most promising engine technologies with the potential to combine fuel efficiency and improved emissions performance, offering reduced nitrous oxides and particulate matter alongside efficiency comparable with modern diesel engines. Despite the considerable advantages, its operational range is rather limited and controlling the combustion (timing of ignition and rate of energy release) is still an area of on-going research. Commercial applications are, however, close to reality. HCCI a.
