DATA SHEET AKR 3 Anti Knocking System

Anti Knocking System, AKR 3 • Individual cylinder knocking detection • Detection for each combustion • FFT background noise filtering • Highly precise level detection • Individual cylinder misfire detection

Data sheet Anti Knocking System, AKR 3 Application The AKR 3 anti knocking system is designed to be an integrated part of a gas engine control system. However, the system can also be used for other engine types, like for example dual-fuel engines. The AKR 3 requires mounting of 1 knocking sensor per cylinder, alternatively 1 sensor per 2 cylinders, dependent on the engine type in question. The sophisticated FFT (Fast Fourier Transformation) division of the signal detected by the knocking sensors into base and harmonic frequencies enables the AKR 3 to provide a very accurate picture of combustion...

Data sheet Anti Knocking System, AKR 3 Protection functions Heavy knocking alarm for each individual cylinder if the maximum knock energy is exceeded. Knocking alarm for each individual cylinder if the maximum control value is reached. Knock sensor error, speed sensor error, configuration error, internal error. Optional: Misfiring alarm for each cylinder, detected for each individual ignition. Historical logs Short term and long term diagnostics and parameter changes are logged. Ignition retard value (knock control) for each cylinder Knocking level for each cylinder Alarm information Diagnostic...

Data sheet Anti Knocking System, AKR 3 Firing angle retard The AKR 3 capacity to provide individual knocking data for each cylinder can, if combined with ignition systems capable of handling individual firing angle retard, be used to control the firing angle for each cylinder. Combined with the retard before power reduction approach to knocking prevention, the system offers an improved utilisation of the engine. This feature is especially useful if the fuel used is of varying quality, like for example biogas or landfill gas. Example: As the methane number (quality) of the gas drops, the AKR 3...

Data sheet Anti Knocking System, AKR 3 Configuration The AKR 3 has to be configured with an engine specific .get file. This .get file includes among other things the engine specific filter parameter for knock detection. If the engine in question is not in our .get library, it is necessary to carry out an AKR calibration on the engine to determine the knock signal and the background noise. This calibration is only necessary once for each engine type, and there is a good chance that your engine is already in the library. Contact DEIF A/S to check. If the engine type in question is not in the library,...

Data sheet Anti Knocking System, AKR 3 Protection of inputs and outputs Input short circuit: With the system powered at 75 % to 133 % of nominal system supply voltage over the operating temperature range, the system will survive a short circuit between any input and the battery positive or negative cables. The control unit will not be damaged or forced into an unsafe operating mode. Output short circuit: The CAN data link is according to the J1939 standard. The driver outputs and inputs are short circuit proof including short to 32 V DC supply voltage at ambient room temperature. RS-232 port:...

Data sheet Anti Knocking System, AKR 3Technical specifications Operating temperature

Data sheet Anti Knocking System, AKR 3 Unit dimensions in mm (inches)

Data sheet Anti Knocking System, AKR 3Available variants Type Knock sensor cable specification: Refer to the Installation Instructions. Receptable contacts: Producer order number is dependent on selected cable size. Only items with DEIF item number are available from DEIF. All other items must be ordered directly from the producer. Type Due to our continuous development we reserve the right to supply equipment which may vary from the described. DEIF A/S, Frisenborgvej 33 DK-7800 Skive, Denmark Tel.: +45 9614 9614, Fax: +45 9614 9615 E-mail: [email protected], URL: www.deif.com