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Journal Article

Influence of Rubber Temperature on Transfer Functions of Bushings

2015-12-01
2015-01-9115
In ride comfort as well as driving dynamics, the behavior of the vehicle is affected by several subsystems and their properties. When analyzing the suspension, especially the characteristics of the main spring and damper but also rubber bushings are of main importance. Still, the properties of the different components are dependent on the present operating conditions. Concerning rubber bushings, several effects have already been investigated, e.g. dependencies of the transfer function of frequency, amplitude or load history. In this context influences of changes in temperature are often neglected. However, in the following research, the focus specifically lies on determination and analysis of the temperature dependency of rubber bushings. For this purpose, initially the relationship between properties of pure rubber and rubber bushings is described, which serves as a basis for correlating respective temperature dependencies.
Technical Paper

Optical Investigations on Partially Premixed Diesel Combustion for Different Operating Parameters

2008-04-14
2008-01-0041
Combustion processes with partially or fully premixed cylinder load combined with self-ignition provide high combustion efficiency and low emissions of Nitrogen Oxides (NOx) and particulate matter at the same time. Since the number of diesel operated passenger cars is still rising, it would be interesting, if such a combustion concept can be realized in an ordinary DI-Diesel engine which is operated with conventional diesel fuel. In this study, the influence of nozzle geometry, Tintake, pTDC and injection timing on the functioning chain of combustion was analyzed in a transparent single-cylinder diesel engine equipped with a common rail injection system by means of optical measurement techniques. Simultaneously, different optical diagnostics (laser-based and non laser-based) were used to study the fuel distribution, ignition and combustion in the combustion chamber of the optically accessible diesel engine. The liquid fuel was visualized by Mie scattering at 532nm.
Technical Paper

A Fast Auxiliary Defrosting/Heating System

1992-02-01
920015
Comfort and safety of car passengers are the main concern of car manufacturers. Whilst there are adequate solutions as long as the car's engine is running, the first few minutes still pose a problem. The rapid heating/defrosting system under discussion avoids these difficulties by the use of a burner, fired by the car's fuel. Minimized masses in the system result in extremely short reaction time while enhancing designers' freedom where the car system is concerned. Applications in standard cars as well as in extremely fuel-efficient or electrically powered cars are discussed.
Technical Paper

Optimization of Water Heating Systems

1989-02-01
890050
Webasto has developed a wide range of pre-heaters and auxiliary heaters for vehicles. In order to obtain optimum performance an optimized integration in the vehicle is essential. This paper will deal with the integration of water heaters, as a general example, in private cars. The object of this paper is to present possible forms of integration, assessment criteria and methods which will lead to an optimized solution.
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