Jindrich Krivka

Autonomous control system of Electrically Regenerable Diesel Particulate Filter for light duty vehicles

This paper describes a new approach to designing ERDPF control system. Contrary to the previous system, which used the high performance relay for switching the regeneration current, the new solution uses only semiconductor electronic parts. The ERDPF filter is designed to meet the requirements of the EURO 6 emission standard for PM. The ERDPF filter was designed with emphasis on the independence of the connection to internal vehicle communication buses, which means that the ERDPF control system does not need any external data for its correct function.

Electrical glowing of filtering elements in the DPF filter

This paper deals with controlling of the DPF filter regeneration. Our field of study is electrically burned DPFs. The paper contains the results of the burning tests and their comments. A task of the DPF regeneration is to burn soot accumulated in DPF. This needs to reach a sufficient temperature but not to exceed the safe temperature. Possibilities for determining a temperature in the filter are discussed. Advantages and disadvantages of these methods are described. For the real application one of them was chosen. A prototype of control device was designed.

Replacement of the mains voltage by reconfigurable Li-ion battery for 4kW power inverter

The goal of this paper is to describe the key parts of proposed Li-ion battery system with reconfigurable topology for high power, 4kW power inverter as a replacement of the mains supply voltage in places where is not available. The proposed system was designed with regard to the safety, reliability and cost.

Control and navigation system for mobile platform

This paper deals with problems of design and realization of control system for autonomous robot. First part of project was to design hardware modules for data collection and motor control. Second part was SW that collects data from different types of simple sensors through Data collection module connected to CAN bus and from more advanced, like GPS and Microsoft KINECT, through USB. According these data, SW plans route with possibility of obstacle avoidance, glyph following and manual control, using wireless joystick (gamepad).

Self-sufficient system for NOx reduction

This paper describes a SCR system which is being developed for using with the diesel engines. Unlike the commercial products this system has not to be connected with the electrical control units or sensors of the target engine. It means the system is not dependent on the vehicle type. The goal of this project is to develop a self-sufficient system for the reduction of nitrogen oxides. This feature enables using the same system in wide range of projects, including retrofitting. It also describes whole hardware principle and the interconnection between modules. Additionally the basic behavior of the catalytic convertor is described and demonstrated by the results of several tests on the test bench.

Automatic detection of different mechanical ERDPF configurations

The Electrically Regenerable Diesel Particulate Filter is primary intended as part of an exhaust system which is able to use for a vehicle retrofitting. The portfolio of target applications is wide therefore it was necessary to design an electronic system which will be usable for all hardware configurations of ERDPF filters without any changes in firmware of the electronic control system. The electronic system was designed as a modular system which uses the new automatic detection methodology of mechanical ERDPF constructions. The automatic detection function is based on the bus switches and measuring of power consumption.

Li-Ion state of charge estimation methods

The goal of this paper is to describe the key methods for state of charge estimation. The presented techniques are current counting method, open circuit voltage and battery internal resistance method. This paper describes these methods and compares their accuracy.

Software for rail traffic simulator

This paper presents the control software system for a railway traffic simulator. It has been designed as a teaching aid for the Department of Applied Electronics at the University of West Bohemia. The user interface has been designed to allow easy definition of the model railway. The core library handles all communication with real world units, simulation and railway safety.

Hardware for rail traffic simulator

The goal of this paper is to describe the hardware for a rail traffic simulator. It has been designed as a teaching aid for the Department of Applied Electronics at the University of West Bohemia. The simulator was developed for verification of the reliability of railway safety algorithms for direct access of the human factor. The simulator consists of: rails, position balises, station units, rail vehicles, a train cabin and a safety application, which is verified. Communication between the elements of the system is based on wireless transmissions. The hardware withstood well during testing by randomly selected people. It fully meets the requirements of the system.

Control unit of monitoring airship and his communication interface

Because there are many things which need to be monitored (for example traffic jams, demonstrations, sports events, floods, etc.), we have started project of monitoring airship. This paper deals with the control unit of the monitoring airship and its communication with ground base. The main control board is equipped with many sensors. It provides the ground base information about altitude of flight, azimuth of airship, tilt in both axes, air temperature and air humidity. In cooperation with other units, it enables measurement of battery voltages, current consumption, recording of GPS data and many other functions. The Xbee PRO modules and RFM12B are used for wireless communication between the ground base and the airship. Currently, the airship allows only manual control, so this paper does not deal with flight control.