Altus VARIO
Trans National Trabant Tour 2007
Trabant sraz Morava
Jawa 500 OHC Ignition
new version with MOSFET transistors
supply voltage 3,5V to 25V
The Ignition sets include rotate shielding
Fotodocumentation
documentation for instalation
More information you get by the e-mail info@imfsoft.com
The ignitron is enabled by the excitation of two coils with integrated optical rotation reading sensor.
All the functions and optional working ignition regimes can be set by a personal computer. For this reason there is a Ignition Control application that also enables online visual control of real values of turns, pre-ignition (set-up time). To connect the personal computer through ignition the standard extension cable of RS232 link should be used.
Only one digital input can change over the ignition curves. The pre-ignition directing is realized by the conversion of asked pre-ignition curve into schedule of time delays. Depending on actual turns of a engine the individual time delays are chosen from the schedule and via the microprocessor exactly measured and that is how the final effect of set up directing works.
Main Features
| Parameters | Range |
| Supply voltage | 3,5 to 25V, (overvoltage protection 33V) |
| Engine working speed | 0 to 25.000 RPM |
| Advance control | 0 to 90° |
| Working temperature | -40 to 70°C |
| Engine speed for advance control | 500 to 20.500 RPM |
| Flash energy | Max., Med., Min., Direction (from engine RPM) |
| Coil current | max. 15A |
| Board voltage | not implemented |
| Digital input (DI1) | 0 to 1V = L, 3 to 20V = H |
| Auto. disconnection inductors | 5 to 120s after stop of engine |
Conectors and rotate shielding scheme
Conector description
| Label | Sense | Range, active level |
| DI1 | Digital input | 0-3V -> L, 3-12V -> H |
| + | Supply voltage | 3,5 to 25V, (protection 33V) |
| G | Ground | 0V |
| 1a | Coil current A | < 15A |
| 1b | Coil current B | < 15A |
Installation scheme
Main scheme in variant with two coils.
The advance set up
The last and the most important point in the installation are the proper settings of the ignition to serve all demanded functions perfectly.
First it is necessary to know what maximal pre-ignition advance each engine demands in the first period. This maximal pre-ignition advance must be set in the reading sensor of rotation (e.g. 35°) and also be held as a reference value in the program in a Pre-ignition curve bookmark, item Rotation Reading Sensor. Always the value of pre-ignition set in the sensor must be adequate to the value set in the program. According to this value the conversion of the ignition advance curve is saved in a schedule, mainly the actual truth of On-line visualisation.
The value of advance on the rotation reading sensor can be corrected later by comparing the actual value of ignition found out e.g. by a stroboscope to the value of advance set in On-line visualisation.
Ignition Control Program
The electronic ignition consists of many functions and their set-up can be realized through a personal computer with Ignition Control program. The computer communicates through the RS232 interface of speed 19200Bd. That is why the computer must have at least one COM port and/or USB/RS232 transducer. The application works under the Windows 95 or higher. It requires 4MB of empty space in hard disc. The minimum PC configuration is Pentium 166MHz, 32MB RAM is accurate.
Online visualisation
Online visualisation displays these basic parameters:
- Engine RPM
- Engine advance
- Digital input (DI1)
To run visualization it is always necessary to connect the computer with the ignition by a serial extended cable, to open the communication port and to run the visualization by pressing the button Start. In case that after pressing the button Start the real data do not display please control the connection of communication cable, the number of the used communication port and the voltage of the ignition.
The ignition advance curve
The basic character of the ignition is the directing the ignition advance according to real turns of the engine. To set ignition advance directing characteristics there is Ignition advance curve bookmark.
Extended functions
To increase safety of running and also for extended ignition advance curve settings possibilities there are extended functions. It is a file of digital inputs DI1. The functions of individual extending inputs and outputs can be permitted or inverted.
- Power down - 5 up to 120s
Permitting to automatic coil excitation switch-off after asked time of 5 up to 120s passed. It prevents from the inductor damage by permanent exciting current.
- RPM limit -1000 up to 25000 turns/min
Permitting turn limit function causes regular interrupting of the coil excitation after exceeding asked turn limits.
- RPM stop - 1000 up to 28000 turns /min
Exceeding asked turns causes full interruption of excitation. It will be renewed when stopping the engine.
- DI1 - Switch Curve 1/ Curve 2
It enables easy ignition advance curve switch-over whenever the engine is running. If the function is not active Curve 1 is used.
The rotate shielding instalation scheme
Inslalation board
Side view
Size of rotate sensor
The rotating sensor must be turn from 30° to 35° up to upper state of cylinder.
Instalation guide
1-"wormling"4 piece9-screws to adherenting2 piece
2-female screw6 piece10-screws for connector2 piece
3-underlay8 piece11-underlay for shade1 piece
4-ignition1 piece12-shade1 piece
5-spread columns2 piece13-fixture of shade1 piece
6-female screws to connector2 piece14-ending underlay1 piece
7-holder of connector2 piece15-custodial screw1 piece
8-underlays to connector3 piece
The sets of ignition include all of this component .
Fotodocumentation
Why you must use the Jawa 500 OHC Ignition
The electronics ignition allows very exactly direction of advance. This provide more of engine power in wide rande RPM. The ignition allows very easy engine to start (optimal advance), more power (high energy of flash) and with the rules of economy driving then decrease of fuel consume. The ignition is work in guaranteed voltage range from 3,5V to 25V.
Documentation
For more information use documentation
jawa-500-OHC-ignition.pdf [pdf, 472 kB]
Software description
ignition-control.pdf [pdf, 318 kB]
ignition-control.pdf [pdf, 251 kB]
FAQ – frequently asked questions [pdf, 116 kB]
FAQ – frequently asked questions [online]
Download
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USBdriver.zip - USB driver for windows [zip, 1.216 kB]
USBdriver_3.0.zip - USB Driver for Windows v3.0 [zip, 296 kB]
jawa500ohc1.wmv - Short video [wmv, 926 kB]
jawa500ohc2.wmv - Short video [wmv, 1.172 kB]
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Price 125 EUR (including 20% VAT)
Written price include VAT (20%).
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