EMU BLACK; pre-ignition and knock sensor output

Hi, I would like to ask if it is possible to get information about the current pre-ignition angle from the EMU Black output. The second question I would have is if it is possible to get the output from the engine knock sensor and how it could be processed in LabVIEW.
Thank you for your response.


The output data regarding the current ignition advance angle is sent via CAN or RS232 bus. During tuning, these values can be read in the log and later exported as a .CSV file.

When setting up the knock control strategy, it’s best to use headphones and an additional knock sensor attached to the engine block (as close as possible to the stock sensors or in the middle of the engine block near the cylinder head). A highly recommended device for this purpose is the Tuner Nerd Knock Monitor Pro V3. Unfortunately, I don’t have experience with LabVIEW. I sometimes record the sound and analyze the spectrogram using Audacity. If I am certain that knock is not occurring, and the engine is generating the appropriate power, I then adjust the parameters and maps for knock detection in the EMU BLACK system.

Could you provide me with a communication protocol that would allow me to display the value of the current pre-angle in real time via CAN or RS232?
Furthermore, I would like to know if it is possible to process the signal from the knock sensor in the form of a voltage… I mean as shown in the following datasheet, where there is a voltage and frequency dependence.Would I be able to use this characteristic to determine if it is detonation combustion?https://cdn.shopify.com/s/files/1/0057/7712/9587/files/Knock_Sensor_KS4-R2_Datasheet.pdf?14168914417522321501

The description of the CAN Bus stream can be found in the EMU BLACK client under the CAN, Serial tab.

Each engine model generates a different frequency during knocking combustion. It is usually dependent on the cylinder diameter. It isn’t possible to identify knocking combustion solely based on the generated voltage from the knock sensor. Many factors influence this, such as the gain set in the EMU BLACK device or noise from the crank-piston system.

The datasheet provides a chart showing the sensor sensitivity versus frequency. It illustrates the voltage that will be generated for a given acceleration and frequency.

The first stage of knock input is the bandpass filter.
It filters out all frequencies that aren’t the knock.
To make frequency analysis just record sound from the knock sensor and then use PC software like Audacity for spectrum analyses.