[Diy_efi] WB Lambda Meter

[Justin Starkey @ VMP]

While you're adding all these features some kind of rpm logging would be nice as well.
Justin Starkey
www.VelocityMustangPerformance.com
**Quote Original E-Mail In Reply**
----- Original Message ----- 
From: "Klaus Allmendinger" <klaus at innovate-tech.com>
To: <diy_efi at diy-efi.org>
Sent: Thursday, November 14, 2002 6:23 PM
Subject: [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. 
> 
> 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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> 


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