Tudor Mitran

A Pneumatic Propulsion System for Urban Cars

Compressed air vehicles can be an alternative for new, low polluting emissions, urban cars. This paper presents a new innovative concept of a pneumatic motor propulsion system that aims to improve the efficiency of such systems. The advantages and the disadvantages of the proposed propulsion system are taking into consideration and some application have been analyzed.

Driver drowsiness detection using ANN image processing

The paper presents a study regarding the possibility to develop a drowsiness detection system for car drivers based on three types of methods: EEG and EOG signal processing and driver image analysis. In previous works the authors have described the researches on the first two methods. In this paper the authors have studied the possibility to detect the drowsy or alert state of the driver based on the images taken during driving and by analyzing the state of the driver’s eyes: opened, half-opened and closed. For this purpose two kinds of artificial neural networks were employed: a 1 hidden layer network and an autoencoder network.

The Calculation Algorithm for the Determination of the Temperature at the End of the Intake Stroke for GDI Engines

The paper presents an algorithm for the calculation of the parameters of the working fluid at the end of the intake stroke for a GDI engine. This is only a part of a program developed by the authors, based on an own designed cycle model. The intake process determines the further evolution of the working fluid during the entire engine cycle. The initial parameters depend on the ones at the end of the previous cycle. This algorithm calculates the temperature at the end of the intake stroke and the adiabatic exponent of the intake process.

A Propulsion System for Means of Transport with Non-Autonomous Electrical Traction

The paper presents a new, innovative concept regarding a propulsion system for non-autonomous electric vehicles (trolley buses, trams, subway frames). The system’s main part is the electric-hydraulic generator. The generator converts electrical energy into hydrostatic energy that’s stored in an accumulator. By using a hydraulic motor, this hydrostatic energy is converted in motor torque in form of rotational motion. Because the electric motor operates in a single regime, the electric consumption is reduced. Also the new system ensures better dynamic performances and operational safety.

Vehicle Driver Drowsiness Monitoring and Warning System

The paper presents a new method of monitoring and warning drowsy drivers in order to prevent accidents. Analyzing current approaches we decided to study algorithms which can be used for drowsiness/awareness detection when applying techniques based on EEG and EMG signals measurement. There are also a large number of studies which uses EEG signals for brain – computer interface applications. This method has the advantage that is independent from the equipment, vehicle or situ where it is used, and can be applied both for drivers and equipment operators too.

The Calculation of the Pressure Losses in the Hydraulic Circuit of a Single Regime Operating Thermal-Hydraulic Generator

The thermo-hydraulic single regime operating generator is an innovative concept developed for the propulsion of road vehicles. The aim of the paper is to calculate the pressure losses in the hydraulic circuit of the single regime running thermo-hydraulic generator. The calculus is based on a modular approach proposed by. The pressure of the hydraulic liquid is determined by taking into consideration the local and the linear pressure losses in the system. These pressure losses are calculated applying classic formulas. This is important because the free piston displacement depends on the pressures acting on the side surfaces. The calculus algorithm is based on the constructive data of an experimental model.

The Calculation of the Injection Process for a SI Engine with Electromagnetic Injectors

The objective of this paper is to solve the differential equation that determines the duration of the injection and the time constant (T). Moreover, the injection rate, the instantaneous and flow section through the injector are calculated depending on the needle’s lift.

Studies Regarding Occupant Kinematics in the Vehicle at the Frontal and Rear Impact

In this paper is presented the analysis of the behavior of occupants inside a vehicle during road events, methods and means of biomechanics. Also, to analyze the behavior of the occupants were taken into account research methods impact occupant kinematics, based techniques for acquisition and processing of experimental data.

THE CALCULUS OF THE FUEL CONSUMPTION AND OF THE INJECTION DURATION FOR A SPARK IGNITION ENGINE

In this paper is presented the calculus, designed by the authors, of the fuel supply scheme for a multipoint injection system. The calculated outputs are the fuel consumption and the injection duration depending on the rotational speed and on the environmental temperature. A computer program was developed to determine the parameters of a SI engine in two cases: 1. the calculation of the injection parameters depending on the rotational speed (n) and on the airfuel ratio () for environmental temperatures t0=-35...+45 C and environmental pressures p0=1·10 5 Pa; 2. the calculation of the injection parameters depending on the rotational speed (n) and on the environmental temperature t0 for a air-fuel ratio =1 and environmental pressures p0=1·10 5 Pa. Keywords— electric pump, electronic injection, flow meter, air-fuel ratio

Educational Pneumatic Engine for a Small Size Vehicle

The paper presents the design and testing of a pneumatic engine built from standard cylinders. The engine, designed as a centric inverted slider-crank mechanism, had been modeled and simulation results are presented together with some test results used to validate the model.