Chen Liangliang

Bio: Chen Liangliang is an academic researcher from University of Shanghai for Science and Technology. The author has contributed to research in topics: Injector & Fuel injection. The author has an hindex of 1, co-authored 1 publications receiving 12 citations.

Study on the measurement of dynamic characteristics for automotive electronic fuel injector

Abstract: The dynamic characteristics of an electronic fuel injector have important effects on the accuracy of air-fuel ratio control in a manifold injected gasoline engine In this paper a mathematical model to calculate the opening time and closing time of higher impedance injector is built Under specific constructional dimension of the injector, the model equations are solved Thus, the curve of the circuit current during a work circulation is obtained According to the characteristics of the curve, a measurement system to get the opening time and closing time of the injector is developed Under different working voltages, the opening time of the injector obtained from the model and the measurement system are compared, and the similar results show that the measurement system is successful

Teaching Innovation of Single-chip Microcomputer Principle and Interface Technology

Abstract: Teaching system of Single-chip Microcomputer Principle and Interface Technology course is systematacially analyzed.The system comprises teaching,network learning,graduation project and electronic design competition,which form a feedback teaching system.Based on the characteitstics of teaching and network learning,the task derivation method and the timely teaching method are produced respectively.By graduation project and electronic design competition,teaching effect is tested and fed back in order to improve teaching quality.Lastly,the problems about constructing textbook and teaches of the course and attentive things in the course of teaching,are roundly studied.

Diagnostics and measurement of the gasoline engines injection system

Abstract: The paper presents the electronic fuel injection system research results, which can be used in diagnostic issues. Have been described the construction and operation of a typical fuel injection system and analysed its electronic part. It has also been proposed method for the detection of the injector malfunction, based on the analysis of differential current characteristic. Have been shown differences in the electrical parameters of the individual fuel injectors, which can be corrected e.g. by suitable self-learning algorithms. Słowa kluczowe: elektroniczny wtryskiwacz paliwa, diagnostyka, pomiar, charakterystyka prądu różnicowego.

Detection of faults gasoline injection system for new OBD systems

Abstract: Evaluation the condition injection system be possible realize voltage check and current during activities injection system. This measuring offers the quantity information that would be possible to apply in On Board Diagnostic. Exploitation residue in the process will be advantage, but occur problem of creation model. Will go especially little difference into manufacture injectors, which oneself show too in the measured characteristics. By applying the tutoring algorithms would this issue be removed.

Non-Destructive Measurement for High-Voltage Transformer of Ignition System

Abstract: This article describes evaluation principles of electrical parts of the ignition system, using conventional automotive diagnostic systems, based on evaluation of current and voltage waveforms and also the non-destructive thermovision method. The thesis deals with the analysis of fault status of the ignition system where thermograms of the temperature distribution of the ignition coils and the analysis of high voltage ignition curves allow us to evaluate the failure state of the electrical system adequately.

Diagnostics of automotive ignition system in operating conditions

Abstract: This article describes evaluation principles of various parts of the system of ignition through respectable measuring systems based on the evaluation of voltage and current waveforms. Practical tests, measurements, diagnostics and following analyze have shown that thermal imaging plays an important role in the diagnosis of online car controls. If will be compared the non-standard heating of a part of the electric system with the combination with the high-voltage time measuring method, that is possible to analyze the failure and also monitoring the system operating mode. An example of an ignition coil temperature distribution thermogram and analysis of high voltage ignition curves with error spark plugs is given in the section on non-destructive diagnosis with temperature differences. By analyzing the failure state of ignition systems, using the method of diagnostics of high-voltage pulse behaviors and also the method of thermal imaging diagnosis, it is possible accordingly to review the functional of the electric system and its various components. In some cases, it not possible use the classical method with ignition single-coil system, and it is recommended continues the analysis of temperature fields.