3W 157xi TS Handbuch - Seite 18

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intelligent Ignition System with microprozessor controlled auto timing

General

For optimum operation of combustion engines an ignition system with auto timing is necessary. For easy starting up a spark is ideal in the upper

dead point position of the piston. With increasing rpm a pre-ignition timing up to 30 degree is needed. This is achieved with our new system

using a high precision rpm-check by two magnets built-in the hub of the engine. The hall sensor transmits the signal to the microprocessor,

programmed with our engine characteristic.

Technical specifications

Temperature range:

Voltage range:

Operating voltage

Suggested battery capacity

Open - circuit current

Current - consumption

Ignition Voltage

Rpm. max

Magnet red (North Pole)

Magnet green (South Pole)

*current consumption depends on the voltage of battery used with increasing voltage, current consumption goes down.

Like all other electronic devices the ignition box gets warm under operating conditions. For that reason a simple airflow has to be guaranteed.

Therefore the 4 delivered rubber mounts have to be used for installation, insuring a one millimetre gap underneath the box.

Cable information

Sensor cable multi coloured (4 wires)

Red / black long with socket

Red / black short with plug

Yellow / white with plug

Info about red LED

Ignition battery switched on:

Propeller 2 turns (flip):

Propeller not being turned (flipped), after a few seconds:

- The engine cannot be started by coincidence if somebody forgot to switch off the ignition

- Battery will be protected against incidental discharge

In case the LED will not get off when propeller is turned (flipped): hall sensor is not connected or other defect

Since June 2003 the operating voltage is 6,0V - 5 cells NiCd or NimH or 2 Lipo cells (2S) can be used without voltage regulators. Ignitions,

wich were built before 2003 need 4,8V (4 cells). The IIS ignition system may not be attached to a voltage regulator. This is already integrated

and regulates the input voltage to 5V. The Ignition is set by factory no adjustment is requiered.

IIS - IGNITION SYSTEM 4.1

- 40

C / + 60

4,8 - 8,4 V

One - cylinder

6 V NICAD / 7,4 V LiPo can be connected without voltage regulator

1700 mAh

18 mA

20-25 mA

80-100 mA*

700-950 mA*

1000-1200 mA*

> 20 kV

12.000 rpm

upper dead point

before upper dead point

to sensor

to battery

connection for red LED, long contact -

connection for 3W tachometer and other options

This safety function has two reasons:

more infos: www.3w-modellmotoren.de

ambient temperature

0 rpm

1000 rpm

6000 rpm

10.000 rpm

LED on

LED off - ignition in standby

LED on, ignition in standby

two - cylinder

2400 mAh