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MegasquirtnSpark-extra Firmware for megasquirt

 

Wheel decoder and wasted spark ignition

The wheel decoder allows the use of a multi-toothed trigger wheel such as 36-1 (commonly fitted to Fords), 60-2 (used mainly by Bosch and therefore very widespread in Europe.) Custom wheels such as 6-1 or 4-1 also work. Also supported are dual wheels such as the 24/2 wheels seen on Mazdas and Toyotas. These have two wheels, one with 24 evenly spaced teeth and a second pair of teeth with a second sensor.

For this Nippondenso dual wheel CAS/dizzy setups frequently used on Mazda and Toyota engines, take a read through the 2nd Trigger page

The code supports a single coil; wasted spark with multiple coils and can support coil per plug in some installs.

For wasted spark you require a minimum of single "missing tooth" crank wheel, only engines with an even number of cylinders being supported. You need at least 4-1 for 4cyl, 6-1 for 6cyl or 8-1 for 8cyl. However, the 36-1 wheel is probably the easiest to obtain.

Coil per plug requires a single pulse per 720 degrees and is easiest to achieve with a hall sensor and a single trigger point on the cam wheel. At present the "stable" code does NOT support a cam signal AND a missing tooth crank wheel, but the 027 alpha codes DO.

 

The easiest install will be wasted spark using VB921 to drive the coil(s) on a V3.0 PCB. In this way it can be used like EDIS but without the need for an EDIS module, it has the advantage of allowing spark cut rev limiting. The downside is that it is more difficult than EDIS and requires extra software settings.

 

 

 

søk etter "60-2 on flywheel"

 

Working example 1

Vehicle: Kia Rio

Engine: A6D 1.6L DOHC 16v 4cyl (A5D, 1.5L is identical setup wise)

 

Setup: 60-2 on flywheel, oem hall sensor in bellhousing

Trigger Angle: 67º

Trigger Position A: 10

Trigger Return A: 18

Trigger Position B: 40

Trigger Return B: 48

 

2x VB921 IGBTs off LED17 and LED19, running dwell 4.0ms, cranking 6.0ms, on oem waste spark coils.

 

NOTE: Cyl 1,4 on LED19, Cyl 2,3 on LED17. Trigger angle actually corresponds to TDC Cyl 3

 

i suspect other Kia models to be the same, at least those with the Siemens/Infineon ecu, which is a ripoff of the Bosch Motronic. All the OEM sensors are "License Bosch" stamped right on them.

Thanks to sportage4x4

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