“Air Inlet Grilles for Passenger Cars”

Abstract Tire vibration modes are known to play a key role in vehicle ride, for applications ranging from passenger cars to earthmover equipment. Inputs to the tire such as discrete impacts (harshness), rough road surfaces, tire nonuniformities, and tread patterns can potentially excite tire vibration modes. Many parameters affect the frequency of tire vibration modes: tire size, tire construction, inflation pressure, and operating conditions such as speed, load, and temperature. This paper discusses the influence of these parameters on tire vibration modes and describes how these tire modes influence vehicle ride quality. Results from both finite element modeling and modal testing are discussed.

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Assessing the Impact of the Inlet Total Pressure Distortion on the Turbofan Thrust

Mechanical Engineering and Computer Science ◽

10.24108/0118.0001360 ◽

2018 ◽

pp. 19-30

Author(s):

Yu. A. Ezrokhi ◽

E. A. Khoreva

Keyword(s):

Total Pressure ◽

External Compression ◽

Average Value ◽

Inlet Distortion ◽

Air Inlet ◽

Engine Thrust ◽

Relative Value ◽

Main Effect ◽

Pressure Recovery Factor ◽

The Impact

The paper considers techniques to develop a mathematical model using a method of «parallel compressors». The model is intended to estimate the impact of the air inlet distortion on the primary parameters of the aero-engine. The paper presents rated estimation results in the context of twin spool turbofan design for two typical cruiser modes of flight of the supersonic passenger jet. In estimation the base values σbase and the average values of the inlet ram recovery σave remained invariable. Thus, parametrical calculations were performed for each chosen relative value of the area of low-pressure region.The paper shows that an impact degree of the inlet distortion on the engine thrust for two modes under consideration is essentially different. In other words, if in the subsonic mode the impact assessment can be confined only to taking into account the influence of decreasing average values of the inlet total pressure, the use of such an assumption in the supersonic cruiser mode may result in considerable errors.With invariable values of the pressure recovery factor at the engine intake, which correspond to the speed of flight for a typical air inlet of external compression σbase, and average value σave, a parameter Δσuneven has the main effect on the engine thrust, and degree of this effect essentially depends on a difference between σave and σbase values.

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PROJECT ON ELECTRONIC STEERING SYSYTEM

SMART MOVES JOURNAL IJOSCIENCE ◽

10.24113/ijoscience.v4i5.140 ◽

2018 ◽

Vol 4 (5) ◽

pp. 7

Author(s):

Shivam Dwivedi ◽

Prof. Vikas Gupta

Keyword(s):

Steering System ◽

Essential Elements ◽

Variable Pressure ◽

Passenger Cars ◽

Control Techniques ◽

Steering Mechanism ◽

Dynamics And Control ◽

Active Research ◽

Electronic Steering ◽

And Control

As the four-wheel steering (4WS) system has great potentials, many researchers' attention was attracted to this technique and active research was made. As a result, passenger cars equipped with 4WS systems were put on the market a few years ago. This report tries to identify the essential elements of the 4WS technology in terms of vehicle dynamics and control techniques. Based on the findings of this investigation, the report gives a mechanism of electronically controlling the steering system depending on the variable pressure applied on it. This enhances the controlling and smoothens the operation of steering mechanism.

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