Powerful, Clean Yet Silent

2006 ◽  
Author(s):  
Norbert Alt ◽  
Hans-Dieter Sonntag ◽  
Stefan Heuer ◽  
Michael Schlitzer
Keyword(s):  
Fuel Consumption ◽  
Fuel Injection ◽  
Combustion Engine ◽  
System Development ◽  
Combustion Noise ◽  
Injection System ◽  
Specific Power ◽  
Vehicle Interior ◽  
Subjective Impression ◽  
Simple Description

Internal combustion engine development nowadays is characterized by decrease of exhaust gas emissions and increase of specific power and torque. Combustion noise excitation and fuel consumption have to be decreased in parallel. All these goals can be met today due to the development of advanced combustion systems and the increased flexibility of fuel injection system and ECU. But hereby, combustion system development and vehicle application have become more complex in recent times. A precise and simple description of ‘combustion noise’ is not trivial in this context. The customer subjective impression of e.g. diesel knock intensity, at vehicle interior and exterior, is the relevant value for this. Combustion noise excitation today is described by using the in-cylinder pressure based FEV CSL. Full calibration NVH potential is explored hereby, while meeting the emission and fuel consumption targets. FEV CSL-CAL is the in-house developed tool for NVH related vehicle calibration. All important ECU parameters are optimized simultaneous under the customer-relevant driving conditions hereby. Additionally, sound quality objective parameters for judgment of subjective combustion noise impression — FEV SQO — are used to find the optimal calibration map, for steady state as well as for cold start and during acceleration. By all this, combustion noise is described well and can be optimized toward customer expectation.

scholarly journals Comparison of the Emissions, Noise, and Fuel Consumption Comparison of Direct and Indirect Piezoelectric and Solenoid Injectors in a Low-Compression-Ratio Diesel Engine

Energies ◽  
2019 ◽  
Vol 12 (21) ◽  
pp. 4023 ◽  
Author(s):  
Stefano d’Ambrosio ◽  
Alessandro Ferrari ◽  
Alessandro Mancarella ◽  
Salvatore Mancò ◽  
Antonio Mittica
Keyword(s):  
Diesel Engine ◽  
Fuel Consumption ◽  
Compression Ratio ◽  
Fuel Injection ◽  
Engine Performance ◽  
Combustion Noise ◽  
Driving System ◽  
Performance And Emissions ◽  
Direct Acting ◽  
Engine Performance And Emissions

An experimental investigation has been carried out to compare the performance and emissions of a low-compression-ratio Euro 5 diesel engine featuring high EGR rates, equipped with different injector technologies, i.e., solenoid, indirect-acting, and direct-acting piezoelectric. The comparisons, performed with reference to a state-of-the-art double fuel injection calibration, i.e., pilot-Main (pM), are presented in terms of engine-out exhaust emissions, combustion noise (CN), and fuel consumption, at low–medium engine speeds and loads. The differences in engine performance and emissions of the solenoidal, indirect-acting, and direct-acting piezoelectric injector setups have been found on the basis of experimental results to mainly depend on the specific features of their hydraulic circuits rather than on the considered injector driving system.

Combustion System Development for the Ramgen Engine

2003 ◽  
Vol 125 (4) ◽  
pp. 885-894 ◽  
Author(s):  
D. W. Kendrick ◽  
B. C. Chenevert ◽  
B. Trueblood ◽  
J. Tonouchi ◽  
S. P. Lawlor ◽  
...  
Keyword(s):  
Bluff Body ◽  
Fuel Injection ◽  
Combustion Engine ◽  
System Development ◽  
Electrical Power ◽  
Combustion Efficiency ◽  
Lessons Learned ◽  
Successful Operation ◽  
Injection Methods ◽  
The Individual

The research and development of a unique combustion engine is presented. The engine converts the thrust from ramjet modules located on the rim of a disk into shaft torque, which in turn can be used for electrical power generation or mechanical drive applications. A test program was undertaken that included evaluation of the pre-prototype engine and incorporation of improvements to the thrust modules and supporting systems. Fuel mixing studies with vortex generators and bluff-body flame holders demonstrated the importance of increasing the shear-layer area and spreading angle to augment flame volume. Evaluation of flame-holding configurations (with variable fuel injection methods) concluded that the heat release zone, and therefore combustion efficiency, could be manipulated by judicious selection of bluff-body geometry, and is less influenced by fuel injection distribution. Finally, successful operation of novel fuel and cooling air delivery systems have resolved issues of gas (fuel and air) delivery to the individual rotor segments. The lessons learned from the pre-prototype engine are currently being applied to the development of a 2.8MW engine.

Introduction to the Conception of Combustion Process Onboard Monitoring System

2014 ◽  
Vol 214 ◽  
pp. 83-93
Author(s):  
Andrzej Bieniek
Keyword(s):  
Monitoring System ◽  
Pressure Sensor ◽  
Rotational Speed ◽  
Fuel Injection ◽  
Combustion Engine ◽  
Combustion Process ◽  
Injection System ◽  
Fuel Injection System ◽  
Speed Sensor ◽  
Future Potential

This paper presents a conception of a system designed for monitoring combustion process in a multi-cylinder combustion engine. The proposed system is based on the application of a pressure sensor installed in one of the engine’s cylinders. The analysis of the combustion process in the remaining cylinders is possible as a result of analyzing the course of the rotational speed by means of a sensor with a large resolution integrated with engine control phase sensor. This paper presents results of the initial testing of its operation and results of research into a system named CPMOS (Combustion Process Onboard Monitoring System) dedicated to a self-ignition engine of an off-highway vehicle. The use of an algorithm which applies a synthesis of a pressure sensor signal and rotational speed sensor offers the possibility of gaining a reconstructed course of pressure in all cylinders in the engine. The proposed measurement of pressure in a cylinder not involving fuel injection system can provide more detailed information regarding the course of the combustion process in the particular cylinders. The proposed concept of the CPMOS system leads to a decrease in the overall system cost as a result of the application of a single pressure sensor in a single cylinder. The future potential application of the monitoring of the combustion in each cylinder can enable the improvement of the operating parameters of the cylinders as a result of optimizing the control of the fuel injection system, EGR system and systems used for limiting exhaust gases used in the vehicle.

Factors Affecting Performance of Dual Fuel Compression Ignition Engines

2013 ◽  
Vol 388 ◽  
pp. 217-222
Author(s):  
Mohamed Mustafa Ali ◽  
Sabir Mohamed Salih
Keyword(s):  
Diesel Engine ◽  
Fuel Consumption ◽  
Thermal Efficiency ◽  
Fuel Injection ◽  
Direct Injection ◽  
Injection System ◽  
Dual Fuel ◽  
Injection Timing ◽  
Compression Ignition ◽  
Factors Affecting

Compression Ignition Diesel Engine use Diesel as conventional fuel. This has proven to be the most economical source of prime mover in medium and heavy duty loads for both stationary and mobile applications. Performance enhancements have been implemented to optimize fuel consumption and increase thermal efficiency as well as lowering exhaust emissions on these engines. Recently dual fueling of Diesel engines has been found one of the means to achieve these goals. Different types of fuels are tried to displace some of the diesel fuel consumption. This study is made to identify the most favorable conditions for dual fuel mode of operation using Diesel as main fuel and Gasoline as a combustion improver. A single cylinder naturally aspirated air cooled 0.4 liter direct injection diesel engine is used. Diesel is injected by the normal fuel injection system, while Gasoline is carbureted with air using a simple single jet carburetor mounted at the air intake. The engine has been operated at constant speed of 3000 rpm and the load was varied. Different Gasoline to air mixture strengths investigated, and diesel injection timing is also varied. The optimum setting of the engine has been defined which increased the thermal efficiency, reduced the NOx % and HC%.

scholarly journals Fuel Consumption Analysis of Injection System and Carburetor System on Honda Beat Fi 2013

2020 ◽  
Vol 20 (3) ◽  
pp. 141-144
Author(s):  
Nyoman Sutarna ◽  
◽  
I Nengah Ludra Antara ◽  
Daud Simon Anakottapary
Keyword(s):  
Combustion Chamber ◽  
Fuel Consumption ◽  
Combustion Engine ◽  
Real Data ◽  
Fuel Mixture ◽  
Electronic System ◽  
Mean Value ◽  
Injection System ◽  
Average Value ◽  
The Mean

An injection system is a process of burning fuel on an internal combustion engine by using an electronic system to inject fuel with air into the combustion chamber. The carburetor system uses a nozzle to blur the fuel mixture with the combustor air. The purpose of this study was to determine differences in the value of fuel consumption from the injection system with the carburetor system. This research was conducted by the experimental method. The results of the analysis showed that the average value of fuel consumption even with the injection system was 51.53ml, while the mean value of the carburetor system was 90.40 ml, this meant that the injection system was more efficient compared to the carburetor system of 44.89 ml or 47%. Conclusion injection system at any rotation is more economical than the carburetor system. It is recommended to conduct further research by taking real data that is distance and travel time.

A Multidimensional Model to Simulate Direct Gaseous Fuel Injection in Internal Combustion Engines

2009 ◽  
Author(s):  
L. Andreassi ◽  
A. L. Facci ◽  
S. Ubertini
Keyword(s):  
Internal Combustion Engines ◽  
Fuel Injection ◽  
Combustion Engine ◽  
Combustion Process ◽  
Three Dimensional ◽  
Air Entrainment ◽  
Internal Combustion ◽  
Numerical Results ◽  
Gaseous Fuel ◽  
Injection System

As a consequence of the endless price growing of oil, and oil derivate fuels, automotive industry is experiencing a concerning decreasing in sales. Accordingly, in order to meet customer needs, there is every day a greater interest in solutions for increasing engine efficiency. On the other hand the growing attention to environmental problems leads to increasingly restrictive regulations, such as European EURO 4 and EURO 5. Direct injection of gaseous fuel has emerged to be a high potential strategy to tackle both environmental and fuel economy requirements. However since the electronic gaseous injection technology is rather new for automotive applications, limited experience exists on the optimum configuration of the injection system and the combustion chamber. To facilitate the development of these applications computer models are being developed to simulate gaseous injection, air entrainment and the ensuing combustion. This paper introduces a new method for modelling the injection process of gaseous fuels in multi-dimensional simulations. The proposed model allows holding down grid requirements, thus making it compatible with the three-dimensional simulation of an internal combustion engine. The model is validated and calibrated by comparing numerical results with available experimental data. To highlight the potential applications, some numerical results of the three-dimensional combustion process in a gas engine are presented.

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