Investigation of Mixture Preparation and Charge Motion Effects on the Combustion of Fast-Burn Gasoline Engines

1989 ◽  
Author(s):  
Wolfgang Bandel ◽  
Gunther K. Fraidl ◽  
Leo A. Mikulic ◽  
Friedrich Quissek ◽  
Hartmuth Carstensen
Keyword(s):  
Charge Motion ◽  
Gasoline Engines ◽  
Mixture Preparation

Establishing New Correlations Between In-Cylinder Charge Motion and Combustion Process in Gasoline Engines Through a Numerical DOE

2010 ◽  
Vol 3 (1) ◽  
pp. 183-201 ◽  
Author(s):  
Olivier Laget ◽  
Jean-Marc Zaccardi ◽  
Xavier Gautrot ◽  
Thomas Mansion ◽  
Emmanuel Cotte
Keyword(s):  
Combustion Process ◽  
Charge Motion ◽  
Gasoline Engines

Future gasoline engine ignition: A review on advanced concepts

2020 ◽  
pp. 146808742095308
Author(s):  
Shui Yu ◽  
Ming Zheng
Keyword(s):  
High Efficiency ◽  
Gasoline Engine ◽  
Empirical Work ◽  
High Energy ◽  
Charge Motion ◽  
Engine Operation ◽  
Gasoline Engines ◽  
Implementation Challenges ◽  
Plasma Ignition ◽  
Discharge Ignition

To meet the future requirements of fuel economy and exhaust emissions, high-efficiency gasoline engines tend to employ diluted combustion concepts along with intensified charge motion and stratified mixtures. Securing the ignition of such mixtures over the full engine operation range is challenging, because of the lowered mixture reactivity and increased discrepancy of stoichiometry. In recent years, increasing research efforts have been spending on innovations of ignition technologies to tackle the challenges. In this paper, the directions of ignition improvement are highlighted based on the fundamental understanding of the ignition mechanisms. The working principles of the primary types of advanced ignition systems are introduced; and relevant engine and combustion vessel test results are reviewed. The ignition systems are categorized as: (1) high-energy spark ignition, (2) pulsed nanosecond discharge ignition, (3) radio-frequency plasma ignition, (4) laser-induced plasma ignition, and (5) pre-chamber ignition. The advanced ignition systems are commented, regarding the ignition effectiveness and the implementation challenges, according to the literatures and the extensive empirical work at the authors’ laboratory.

scholarly journals Trends in Gasoline Engines Technology

2005 ◽  
Vol 121 (2) ◽  
pp. 3-19
Author(s):  
Hubert FRIEDL ◽  
Paul KAPUS
Keyword(s):  
High Performance ◽  
Phase Shifter ◽  
Low Cost ◽  
Direct Injection ◽  
Fuel Efficiency ◽  
Charge Motion ◽  
Passenger Cars ◽  
Gasoline Engines ◽  
Improve Fuel Efficiency ◽  
Variable Valve

The development of vehicle powertrains is increasingly challenged by emission legislation and by the end-users’ fueleconomy demands. In order to meet these requirements it is necessary to continuously improve existing powertrains and to develop totally new generations of engines. For Gasoline engines in passenger cars the most important task is to improve fuel efficiency. Therefore, a big variety of different technologies potentially can be applied. The system range from simple variable charge motion and low cost variable valve timing devices up to highly sophisticated systems like fully variable valve actuation systems and also combustion with auto ignition (HCCI). Direct Gasoline Injection systems of Generation 1 (wall guided systems) and even more the systems of Generation 2 (spray guided systems) improve fuel efficiency, but the significant oncosts for NOx exhaust aftertreatment have to be taken into consideration. Due to its full load benefits homogeneous DGI is a preferred solution for high performance engines as well as in combination with turbocharging for downsizing/downrating concepts. The combination of turbocharging, direct injection and cam phase shifter has proven to be a highly attractive package combining good fuel economy with fun to drive. The different gasoline engines technologies will have to be applied according to the specific needs of their application and brand specific requirements. Even keeping high performance characteristics, fuel consumption will be reduced continuously and future legislative limits can be met. However, system complexity and cost will increase.

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