scholarly journals Analysis of the Automotive Ignition System for Various Conditions

2020 ◽  
Vol 22 (4) ◽  
pp. 144-152
Author(s):  
Matej Kucera ◽  
Milan Sebok ◽  
Matej Kubis ◽  
Daniel Korenciak ◽  
Miroslav Gutten
Keyword(s):  
Measurement System ◽  
Test Laboratory ◽  
Diagnostic Analysis ◽  
Basic Principles ◽  
Ignition System ◽  
Adverse Conditions ◽  
Spark Plug ◽  
Laboratory Device

Paper presents diagnostic analysis of automotive ignition system for various working and adverse conditions in laboratory. Description and importance of basic diagnostics of automotive ignition system are examined in the first part of the paper. In the second the focus is placed on the basic principles and solution of the spark plug model. The test laboratory device is proposed in the following and the specialized measurements were executed by the proposed measurement system. The faults were simulated by application of oil and gasoline between the electrodes and failing by the driver to make the ignition contact on the spark plug.

Ignition System Designed to Extend the Plug Life, and the Lean Limit in a Natural Gas Engine

2003 ◽  
Author(s):  
A. K. Chan ◽  
S. H. Waters
Keyword(s):  
Natural Gas ◽  
Engine Performance ◽  
Ignition System ◽  
Gas Engine ◽  
Natural Gas Engine ◽  
Dc System ◽  
Spark Plug ◽  
Long Duration ◽  
Discharge Duration ◽  
Lean Limit

An ignition system that is based on the alternating (AC) rather than the traditional direct (DC) current in the spark plug discharge has been developed at the Caterpillar Technical Center. This system can generate a long duration discharge with controllable power. It is believed that such an ignition system can provide both a leaner operating limit and a longer spark plug life than a traditional DC system due to the long discharge duration and the low discharge power. The AC ignition system has successfully been tested on a Caterpillar single cylinder G3500 natural gas engine to determine the effects on the engine performance, combustion characteristics and emissions. The test results indicate that while the AC ignition system has only a small impact on engine performance (with respect to a traditional DC system), it does extend the lean limit with lower NOx emissions. Evidences also show the potential of reduce spark plug electrode erosions from the low breakdown and sustaining discharge powers from the AC ignition system. This paper summarizes the prototype design and engine demonstration results of the AC ignition system.

scholarly journals Use of the mathematical model of the ignition system to analyze the spark discharge, including the destruction of spark plug electrodes

Open Physics ◽  
2018 ◽  
Vol 16 (1) ◽  
pp. 57-62 ◽  
Author(s):  
Sebastian Różowicz
Keyword(s):  
Mathematical Model ◽  
Experimental Studies ◽  
Fuel Mixture ◽  
Spark Discharge ◽  
Fuel Additives ◽  
Ignition System ◽  
Spark Plug ◽  
The Mathematical Model

Abstract The paper presents the results of analytical and experimental studies concerning the influence of different kinds of fuel additives on the quality of the spark discharge for different configurations of the ignition system. The wear of the spark plug electrode and the value of spark discharge were determined for various impurities and configurations of the air-fuel mixture.

The effect of advanced ignition system on gasoline low temperature combustion

2019 ◽  
pp. 146808741986754
Author(s):  
Hanho Yun ◽  
Cherian Idicheria ◽  
Paul Najt
Keyword(s):  
Low Temperature ◽  
Nox Emissions ◽  
Low Temperature Combustion ◽  
Efficiency Gain ◽  
Ignition System ◽  
Stable Combustion ◽  
Indicated Mean Effective Pressure ◽  
Spark Plug ◽  
Temperature Combustion ◽  
Valve Overlap

Engines operating in low temperature combustion during positive valve overlap operation offer significant benefits of high fuel economy over the low temperature combustion during negative valve overlap operation. Significant efficiency improvement was achieved by the increased gamma and lower pumping loss. However, NOx emissions were increased due to reliance on the flame-induced combustion. In this study, the corona ignition system was evaluated to reduce NOx emissions during positive valve overlap operation while maintaining the benefit of efficiency gain. The tests were performed in a 2.2-L multi-cylinder engine. The results show that the ignition delay is always shorter with the corona ignition system than with the spark plug. The corona ignition system is able to support stable combustion (coefficient of variation of indicated mean effective pressure <3%) in a lower load during positive valve overlap operation than the spark plug, which gives us additional efficiency benefit. Since the corona ignition system promotes simultaneous ignition of the mixture at multiple locations in the combustion chamber as opposed to ignition being limited to the spark gap channel, the dependence of the flame burn for stable combustion during positive valve overlap operation minimizes, which leads to lower NOx emissions over the spark plug.

Development of an Open Path Laser Ignition System for a Large Bore Natural Gas Engine: Part 1 — System Design

2005 ◽  
Author(s):  
David L. Ahrens ◽  
Azer P. Yalin ◽  
Daniel B. Olsen ◽  
Gi-Heon Kim
Keyword(s):  
Natural Gas ◽  
Pollutant Emissions ◽  
Electrode Erosion ◽  
Laser Ignition ◽  
Ignition System ◽  
Gas Engine ◽  
Natural Gas Engine ◽  
Spark Plug ◽  
Engine Part ◽  
Beam Delivery

Using a laser, as opposed to a conventional (electrical) spark plug, to create a combustion initiating spark is potentially advantageous for several reasons: flexibility in choosing and optimizing the spark location, in particular to move the spark away from solid heat sinks; production of a more robust spark containing more energy; and obviation of electrode erosion problems. These advantages may lead to an extension of the lean limit, an increase in engine thermal efficiency, and the concomitant benefits of reduced pollutant emissions. This paper presents the design of a laser ignition system appropriate for a large bore natural gas engine. Design considerations include: optimization of spark location, design of beam delivery system and optical plug, and mitigation of vibration and thermal effects. Engine test results will be presented in the second paper of this two-paper series.

Measurement and Modelling of Ignition System Energy and its Effect on Engine Performance

1989 ◽  
Vol 203 (4) ◽  
pp. 277-286 ◽  
Author(s):  
C R Stone ◽  
A B Steele
Keyword(s):  
Simple Model ◽  
High Voltage ◽  
Engine Performance ◽  
Significant Determinant ◽  
Ignition Energy ◽  
Ignition System ◽  
Single Cylinder Engine ◽  
Spark Plug ◽  
System Energy ◽  
Spark Energy

This study investigates the effect of ignition parameters on the cyclic dispersion and the specific fuel consumption of a carburetted single-cylinder engine. Ignition energy measurements were made on the low- and high-voltage sides of the ignition coil, and the performance was predicted satisfactorily by a simple model with passive elements. The spark energy was varied by changing the spark plug gap and the coil-on-time. The spark energy was measured in a special calorimeter: the aim was to find a correlation between engine performance and the spark energy measured by the calorimeter. The tests were conducted at part load and low speed with a weak mixture, as these conditions are known to give high levels of cyclic dispersion. The spark calorimeter showed a higher spark plug conversion efficiency for spark plugs with large gaps. However, the spark plug gap was found to be a more significant determinant of engine performance than the spark energy measured by the calorimeter. The experimental results are preceded by a review of ignition phenomena and their influence on combustion.

Diagnostic Analysis of Ignition System Fault of Polaris Engine

2014 ◽  
Vol 539 ◽  
pp. 89-92
Author(s):  
You Peng Chen
Keyword(s):  
Fault Diagnosis ◽  
Fault Detection ◽  
Diagnostic Analysis ◽  
Ignition System ◽  
Working Principle

This thesis gives an introduction of the structure, working principle, main performance and some relevant parameters of Polaris AGN engine ignition system. It illustrates the various faults, reasons, fault detection, diagnosis and removal methods of ignition system, and cites a fault diagnosis example for the reference of automobile maintenance.

Experimental Research on a Dual-Coil Ignition System of CNG Engine

2013 ◽  
Vol 694-697 ◽  
pp. 2954-2959
Author(s):  
Hai Guo Jing ◽  
Li Ping Yang ◽  
Xiu Zhen Ma ◽  
En Zhe Song
Keyword(s):  
Voltage Regulator ◽  
Time Interval ◽  
Ignition Energy ◽  
Energy Increase ◽  
Ignition System ◽  
Charging Time ◽  
Spark Plug ◽  
Single Coil ◽  
Secondary Voltage ◽  
Cng Engine

A dual-coil ignition system was designed in order to improve ignition performance of CNG engine. The change rule of ignition energy was studied in voltage regulator tube string simulated load, the change rule of secondary voltage was studied in spark plug load. Experimental results explain that compared with single-coil ignition, the new ignition system can enhance ignition energy, increase secondary voltage, increase spark duration ,achieve multiple discharge and improve coil energy efficiency under apposite charging time to primary coils and discharging time interval to secondary coils. This system can correct discharge characters according to engine working conditions, which is very useful to CNG engine.

scholarly journals Analisa posisi derajat tonjolan magnet (trigger magnet) pada konsumsi bahan bakar

2018 ◽  
Vol 1 (1) ◽  
pp. 42
Author(s):  
Fatkur Rhohman ◽  
Susdi Subandriyo ◽  
Hesti Istiqlaliyah
Keyword(s):  
Combustion Chamber ◽  
Electric Current ◽  
High Voltage ◽  
Rotation Rate ◽  
Combustion Process ◽  
Engine Performance ◽  
Ignition System ◽  
Spark Plug ◽  
Significant Difference ◽  
Independent Variable

In automotive, many various modifications are made to improve engine performance. One that is done is to maximize the combustion that occurs in the combustion chamber. By maximizing the ignition system in the combustion process, it is expected to enlarge sparks from spark plugs. One of the components affecting the combustion process is Magnet, serves to generate electricity that will become a high voltage electric current and allow the occurrence of spark jumps on the spark plug. In this study, the independent variable is the modified tregger magnet which is reversed 0.50, to 9.50 and 90. in general there is no significant difference. Fcount value for result on magnetic trigger type = 3.00 <F (0.05; 2.24) = 3.40 (rejected H0) means reversing the 90 and 9.50 magnetic triggers does not significantly influence. In addition, Fcount for 6000, 7000, 8000 rpm engine yield = 1.00 <F (0.05; 2.24) = 3.40 (Rejected H0) means the engine's rotation rate has no significant effect. So there is no effect of fuel consumption on the modified magnetic trigger, nor at rpm 6000, rpm 7000 and rpm 8000.

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