Brc Sequent Fastness Download
Jeuel Barrientos
3 0 - Introduction What is SEQUENT 24? SEQUENT 24 is the BRC sequential injection system in the gaseous phase that is easy to install, quick to map and low-cost. Its installation gets simpler owing to the new philosophy adopted for sensors and emulators. The SEQUENT 24 actually does not contemplate any additional devices; the emulators are integrated in the ECU and the sensors are integrated in the main components (Genius and RAIL). The connections are quicker owing to the specific connectors; moreover, it is not necessary anymore to connect the TPS signal whereas the choice to connect the lambda oxygen sensor signal is still optional. For the RPM signal it will be possible to choose a coil signal too, in addition to a standard RPM signal or crankshaft position sensor signal. The new SEQUENT 24 PC programme is easier to use and completely separated from the standard SEQUENT and from the SEQUENT FAST, also as regards the filing of the mappings, but it anyway keeps their basic philosophy unchanged Main differences with the previous SEQUENT systems In the following table you will find the list of the main differences between standard SEQUENT / SEQUENT FAST and SEQUENT 24: Sensors Injectors Cut Key contact and Petrol Injectors Positive Communication SEQUENT / SEQUENT FAST SEQUENT 24 < P1-MAP (case) < Tgas on the reducer < Cut on the negative inside the ECU < Emulation with the Modular LD < To connect to the key contact positive (brown) and to the petrol injectors positive (white-green) < Active with key contact positive ON < P1-Tgas integrated on rail < Twater integrated on the reducer < MANIFOLD PRESSURE ONLY WHILE SELF-MAPPING < Cut on the POSITIVE inside the ECU and simultaneous for the 4 injectors (the orange wires do not enter the ECU) The key contact positive becomes petrol injectors positive that goes into and out from the ECU. ECU ignition only if the petrol injectors positive is active < Active with the engine switched on; once it is connected it remains active even disconnecting the key contact (if the PC/ communication is not disconnected) Changeover switch < 10 pins connected with the ECU < 3 pins connected with the ECU + one for the level on the changeover switch Screen < Connected with the ECU case with a specific pin < Connected with the battery ground TPS connection < Necessary or Optional < Not connected RPM Connection < Necessary or Optional < It is possible to use the RPM counter signal, the crankshaft position sensor signal (only one wire) or the coils negative Filing of the mappings < FSF+AAP file or only FSF for vehicle parameters and mapping Advance variator < Inside < Outside < FLS file for vehicle parameters and mapping. < Separated from the previous Sequent systems 3
6 1.5 - Fuel Rail It is the element bearing the injectors fitted. Unlike the previous sequential systems, the gas pressure and temperature sensor (not compatible with the previous systems) is also fitted on the rail in addition to the injectors (BRC type only). Figure BRC injectors The SEQUENT 24 equipment only uses BRC injectors. See in the following table the powers, for guidance: Injectors Max Type Injectors Normal Type LPG powers Genius 800 Genius 1200 Genius 1500 Inducted - 26kW/cylinder 30kW/cylinder Supercharged - 32kW/cylinder 36kW/cylinder Inducted 17kW/cylinder 21kW/cylinder - Supercharged 22kW/cylinder 26kW/cylinder Gas pressure and temperature sensor This sensor is absolutely new, in a compact body and already integrated with the connector; it contains the P1 gas pressure and temperature sensor. The sensor is directly fitted on the fuel rail. In this position the measurement of gas pressure and temperature is more careful and allows rectifying the gas mixtures more rapidly. Figure 1.6 6
9 06LB UNIVERSAL Harness 06LB RIGHT Harness 06LB LEFT Harness 2 - Programming The software structure is maintained as similar as possible to the BRC sequential systems already on the market and familiar to the BRC installer. Only the material differences introduced for SEQUENT 24 will be therefore here-after indicated File types The SEQUENT 24 ECU is programmed by downloading two different types of files: 1. File.S19 2. File.FSL the information necessary for the vehicle s operation is contained in the file. FSL Assisted personalised procedure Let s find out, in brief, about the assisted personalised programming procedure. The procedure is to be carried out with the engine switched on and the changeover switch on petrol mode (the programme will show the installer when changing over to gas). The steps to follow are not far removed from the ones analysed for the Standard SEQUENT and for the SEQUENT FAST, that s why you are kindly requested to refer to the attendant handbooks for a more detailed description. Assisted personalised procedure STEP 1 Beginning of the procedure STEP 2 Selection of the equipment and injectors type STEP 3 RPM calibration STEP 4 Lambda calibration (optional) STEP 5 Save file STEP 6 Self-mapping STEP 7 Save file End of the procedure 9
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