AW: [Diy_efi] WB Lambda Meter

[Rausch, Bernd]

Hi Klaus,

I would buy one. You have to log RPM with the Lambda data. Either =
inductive pick-up from a plug wire or an input from an ignition coil =
(primary).

Bernd

-----Urspr=FCngliche Nachricht-----
Von: Klaus Allmendinger [mailto:klaus at innovate-tech.com]
Gesendet: Freitag, 15. November 2002 00:24
An: diy_efi at diy-efi.org
Betreff: [Diy_efi] WB Lambda Meter


Hi everybody,

My company is currently developing a new wide-band Lambda Meter based on
the NTK and Bosch Sensors using a new measurement principle. This =
principle
uses proprietary algorithms for calculating Lambda from the sensor data
without resorting to calibration resistors and such. I want to use this
forum to see what the interrest level in this community is for such a
device. Here are the target specs:

1. Precise heater control (Htr resistance controlled to +- 10 milliOhm).

2. Fast, temperature gradient controlled light-off time ( < 20sec)
depending on sensor.

3. 32-character LCD display for AFR, Lambda and Lambda bar-graph.

4. Automatic error detection and display for sensor and connection =
faults.=20

5. Digital Signal Processing for Lambda Signal sampled and processed at
128 times Sensor response speed. Overswing compensated and controlled =
using
digital filtering algorithms.

6. Self compensating for exhaust temperature, pressure (within resonable
limits) and (within reason) sensor aging. Target error < 0.5% lambda.

6. Self calibrating in operation.

7. Linear Lambda output as voltage in addition to display. Programmable
Lambda/Volt ratio to fit user's remote analog lambda display.

8. Simulated HEGO output with programmable switchpoint.

9. Inputs for up to 5 additional analog sensor signals (like TPS, =
MAP/MAF,
CT ...)

10. Stores up to 1 hr of sensor data (for all sensor inputs + lambda
concurrently) internally in non-volatile memory (when sensors are =
sampled
at 100ms). If less sensors are used the sampling time decreases
proportionally.

12. Serial Port for programming and data download. Downloaded data
formatted into Excel compatible file and time-stamped (Windows download
software included).

13. Small hand-held device.

14. Price target < $300.- including sensor.

A cheaper module is also planned that does not include storage and LCD
display but allows the user to program the HEGO output depending on =
other
sensor data using downloadable maps.


Regards,
Klaus



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