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Proceedings ArticleDOI

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

TL;DR: In this article, 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 times and closing times of injector was developed under different working voltages, the opening-time of the injectionor obtained from the model and the measurement system are compared, and the similar results show that the measurement was successful.
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
Citations
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Journal Article
TL;DR: Teaching system of Single-chip Microcomputer Principle and Interface Technology course is systematacially analyzed and the task derivation method and the timely teaching method are produced respectively.
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.

16 citations

Journal ArticleDOI
TL;DR: In this article, the authors presented the electronic fuel injection system research results, which can be used in diagnostic issues and proposed a method for the detection of the injector malfunction, based on the analysis of differential current characteristic.
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.

5 citations


Cites background from "Study on the measurement of dynamic..."

  • ...Construction of an electronic fuel injector [4]: 1 – Iron core, 2 – electromagnetic coil, 3 – armature, 4 – needle valve, 5 – yoke of magnet, 6 – electrical connection, 7 – filter...

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  • ...The interval A is injector inaction, B refers to moving the injector core, C is the injection action with the current increasing, D is injector in operation, E refers to overvoltage caused by the inductance of the injector (moving core injector to initial position), F is fading overvoltage and G is injector inaction [3, 4]....

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Proceedings ArticleDOI
19 May 2014
TL;DR: In this article, tutoring algorithms were used to evaluate the condition injection system and the voltage check and current during activities injection system. But, the problem of creation model was not solved.
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.

2 citations

Proceedings ArticleDOI
27 May 2019
TL;DR: In this article, the authors describe the 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.
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.

1 citations


Cites background from "Study on the measurement of dynamic..."

  • ...In practice, two solutions differing in the number of ignition coils are used [2]....

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Proceedings ArticleDOI
01 May 2020
TL;DR: In this article, the authors describe the evaluation principles of various parts of the system of ignition through respectable measuring systems based on the evaluation of voltage and current waveforms, which can be used to analyze the failure and also monitor the system operating mode.
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.

1 citations


Cites methods from "Study on the measurement of dynamic..."

  • ...Based on the analysis of heat losses using thermovision, it is also possible to confirm and thus increase the reliability of fault detection and its degree in the ignition system [5], [12]....

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References
More filters
Journal Article
TL;DR: Teaching system of Single-chip Microcomputer Principle and Interface Technology course is systematacially analyzed and the task derivation method and the timely teaching method are produced respectively.
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.

16 citations


"Study on the measurement of dynamic..." refers background in this paper

  • ...1 , relevant inaccuracy will not exceed 5μs operational amplifier response time delay will not exceed 5μs normally system 12MHz crystal oscillator frequency, K51 single chip microcomputer delayed action T1 resolution is 1μs [5] software dealing makes it inaccuracy through software compensation to make it not beyond single chip microcomputer one machine cycle which is 1μs, therefore, possibly to make maximum inaccuracy is s tdk μ δ 12 1 1 5 5 = + + + = 14 s tdb μ δ 7 1 1 5 = + + = 15 When injector power supply voltage is 12V, result is as shown dk t =1....

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  • ...injector needle valve opening/closing finishing moment detection circuit Measurement system uses K51/S simulator as controller([5]), injector driving circuit and single chip microcomputer P1....

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Journal Article
TL;DR: In this article, a flow test dais and electronic control unit along with their operation principle were introduced to improve fuel performance of internal combustion engine, and the test data gained in the whole flow range had been analyzed and summarized in order to educe some important flow characteristics parameters.
Abstract: In order to improve fuel performance of internal combustion engine, a designed flow test dais and electronic control unit along with their operation principle were introduced. Taking a high resistance injector as an example, the test data gained in the whole flow range had been analyzed and summarized in order to educe some important flow characteristics parameters. This meter has been put into practice, and a good effect is obtained.

3 citations


"Study on the measurement of dynamic..." refers background in this paper

  • ...But in needle valve opening and closing motion course, injector flow shows obvious nonlinear characteristics([2])....

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