There are tons of wideband controllers in the market now. People often ask: can you differentiate your wideband controller from others?
In short, ALM is an OE equivalent wideband controller while others are after-market products.
First, ALM uses LSU4.9 sensors, and recently, LSU ADV, while most other widebands still use LSU4.2 sensors. For details of the LSU4.9 vs. LSU4.2, see here:
Why LSU 4.9 is superior to 4.2
By the way, after Ecotrons selling LSU4.9 widebands for years, more people start to believe that LSU4.9 is superior to LSU4.2 sensors. And some wideband manufacturers who denied the advantages of the LSU4.9 before start to release their own LSU4.9 controllers. Anyway, since other widebands start to use LSU4.9, what else can differentiate the ALM from others? Here are some major points:
ALM uses Bosch CJ125 chip.
CJ125 is the application specific integrated circuits (ASIC) specifically designed for LSU 4.9/4.2 Sensors. With CJ125, ALMs control the sensor temperature in the close loop mode and precisely keep the LSU4.9 sensor around 780 degree C. In fact, Bosch uses this chip wherever a LSU sensor is used. The CJ125 and LSU sensor are mated-pair by Bosch. Presumably LSU sensors work the best with CJ125 chips.
Quoted from Bosch LSU sensor data sheets: “The wide band sensor LSU operates only in combination with a special LSU control unit (CJ125 ASIC). The functional characteristics given in this document are only valid for operation with the CJ125 according to module specification and with recommended operational parameters.”
Here is the data sheet of CJ125 chip:
Bosch CJ125 product info sheet
Note: CJ125 chip is integrated with the best practice of Bosch sensor control circuits, but it is still just a hardware circuit. Without a good software, it will not work well. Ecotrons was born from auto industries, and we have the expertise and know-how on using CJ125 to control LSU sensors.
ALM uses Freescale’s 16 bit micro-controller.
Freescale is the largest automotive semiconductor manufacturer in the world. Their micro-controllers, or in short, micros, are used for decades in auto industries. Most if not all other wideband controllers use consumer electronics rated micros. The micro is the heart of any controller, like the CPU of your computer. It determines almost everything of the controller. Auto-industry rated micro has higher standards than the consumer electronics. The manufacture process of auto-rated micros costs more than consumer electronics. Naturally, auto-rated micros are more expensive. Most wideband manufacturers choose consumer electronics micros based on 2 reasons: 1) they are cheaper; and 2) they are easier to program (even cheaper). Most end users don’t really understand the difference, but, use common sense please, automotive electronics work in much worse environments than the consumer electronics. Auto-electronics must work in severe environmental conditions, like cold, hot, wet, and / or salty weathers, and vibration, EMI noises; you name it. Consumer electronics just need to work in your room, or it is acceptable to derate in a harsh environment. While people can stand to re-boot a laptop if it runs into a “blue-screen”; people cannot afford a car crash caused by a glitch of the auto-electronics. This tells you the difference between the auto-electronics and consumer electronics.
Freescale S12 16-bit micro family is fast, cost effective, with high quality. Here is the info for this micro family:
Freescale’s S12P micro family
Note: Bosch’s own wideband controller, LambdaTronics or LT4, uses the Freescale’s micro-controller.
Click here for Bosch LambdaTronics
ALM supports CAN bus.
CAN bus communication is the professional data exchange method for automotive control systems, period. Especially for engine controls, an engine control unit (ECU) transmits and receives tons of data on the CAN bus, and one part is the Lambda / O2 concentration from the wideband controller. CAN bus communication eliminates the DAC (Digital to Analog Converter) and then ADC (Analog to Digital Converter) conversions, and therefore eliminates 2 big error sources, and keeps the original signal accuracy. 0-5V analog circuits can easily introduce in +/- 0.02V errors, which can be equivalent to 0.01 lambda error. All the wideband controllers’ 0.01 lambda accuracy are questionable if they are using 0-5V analog output. Compared to the CAN bus, 0-5V analog output is an amateur method.
Note: ALM’s 0-5V analog output is factory calibrated for each unit to minimize the errors caused by the circuits.
Click here for:
ALM-CAN product and spec.
Many other smaller points…
Here is the acknowledgement from eddie sigman:
Matt enclosed is a picture of the machine your alm-s is going to be tuning,its an RAF gyrocopter with a normally aspirated 2.5 Subaru.
Engine with a turbo the produces only 6psi of boost. I have been flying this setup for 3years without any trouble and have 400 hours of flight on it.
In its normal configuration it produces 165 HO,with the turbo it has 230 HP which is needed at this altitude to fly good. thanks again.
best regards,eddie sigman…..
Here is the acknowledgement from FIT Motorsports team:
On behalf of the Florida Institute of Technology Formula SAE Team I would like to thank you for your support this past year. Because of your support, this year’s Formula SAE team was able to design, build and compete with the most advanced Formula SAE car ever produced at Florida Tech.
This accomplishment would not have been a success without your generous support. We truly appreciate the support you have provided, and hope you will consider future partnerships with Florida Tech Motorsports and the 2015 FSAE team.
Attached is a ZIP file containing photos and videos from the 2014 event. Feel free to use these photos and videos on your website, social media accounts, or any other form of media you may wish to do so. I have also provided a link to a YouTube video compilation of the event below.
2014 Business Manager
Florida Tech Motorsports
For more information about FIT motorsports, visit their website. Here is the link to the sponsors page:
2014 FIT FSAE Event Compilation Video:http://youtu.be/OsyWc0AImD8