SEQUENT 56: MULTIPOINT SEQUENTIAL INJECTION SYSTEM FOR CYLINDER VEHICLES FIELD OF APPLICATION

Transcription

1 SEQUENT 56: MULTIPOINT SEQUENTIAL INJECTION SYSTEM FOR CYLINDER VEHICLES FIELD OF APPLICATION Sequent 56 is the evolution of the multipoint injection system for LPG by BRC. New concept product, Sequent 56 is a sideline of the other appreciated gaseous injection systems in automotive field, where BRC is a pioneer, improving the system for performance, easiness and cheapness. Studied and designed to satisfy high level exigencies, it can feed modern and powerful vehicles till 8 cylinders and over 5000 cm 3. Fed powers exceed 30 kw/cylinder reaching nearly a total of 240 kw (326 CV). You can indifferently convert vehicles with vacuum or turbo engine. Sequent 56 multipoint Sequential injection System proved to obtain very good results as emission levels satisfying the strictest anti-pollution norms that are compulsory for last generation vehicles. The use of clean fuels such as LPG avoids creating some polluting agents as PM10 (main cause of the traffic limitations) and reduces CO2 emissions (main hot-house gas). Sequent 56 is easy and fast to install, with high performance continuing the improvement trend of BRC trademark able to offer the installers and final customers a high level product, with the most powerful software strategies for the set up but faster and easier to use and learn thanks to the interface improvement. The installer is able to install and set up the system without help. A guided process studied for his exigencies will guide him in a short time through all the calibration phases allowing carrying out precise and correct set up, in an easy and fast way. Also from the electric and mechanical point of view, Sequent 56 has been studied to allow the installer to have an easy work with reduced overall dimensions. In fact sensors, emulators or other devices normally placed under the bonnet are not needed. Gas temperature sensor is installed on the injector rail while the cooling liquid temperature is controlled by the sensor contained in the pressure reducer. The ECU and harness overall dimensions have been reduced too compared to previous models with the same performance. As for the electric connections, a few ones have to be plugged such us the battery and the positive after turning the key and the system is able to run properly. The system has been studied with the most updated methods allowing high quality standard as for mechanic strength, operative temperature, protection against accidental short-circuits and installation mistakes. Sequent 56 passed strict reliability tests for each component and on the whole system obtaining a quality worthy of the modern automotive standard. Moreover all the protections and precautions required to BRC have been adopted to satisfy the car manufacturers market (filters, waterproof connections, protection against installation mistakes, et.) COMPONENTS Sequent 56 is made up with the most updated components BRC can offers its customers, thanks to a continuous electronic and mechanical research that characterises BRC trademark since ever. ECU Completely redesigned, the ECU integrates the most update components and a new microprocessor able to execute calculations necessary to control the engine in very short time with precise and fast answers. The system is able to assure the best integration for both electronic and communication level (with a serial line K and CAN BUS) without changing the petrol control strategies and translating the petrol ECU injection timing in gas one in a precise and fast way and adapting automatically itself to the gas pressure and temperature changes. Moreover the ECU has other functions among which the automatic changeover and sequential from petrol to gas during whatever driving conditions (acceleration, deceleration and idling) and whatever rpm (BRC patent). It is suitable to satisfy OBD norms. Reducer Sequent 56 can be paired to various models of Genius reducers to supply easily different engine powers and different fuels. The reducer is very small, insensitive to vehicle acceleration and can be installed with different orientations. The gas heating and its vaporisation are assured by an effective thermic exchange with the engine cooling liquid. A temperature sensor for the cooling liquid is placed on the reducer body. Rail and injectors Gas injectors installed in the suitable rail designed by BRC has the aim to supply the gas in each cylinder in sequential process and in the most suitable moment to reach a good combustion. In a sequential system, each injector receives the ECU electric signal independently from the others and supplies a calibrated gas quantity inside the cylinder and during this latter aspiration phase. Sequent 56 can manage different types of injectors to adapt itself in the best way to the engine characteristics of the installed vehicles. FJ1 HE Filter This is a new concept filter, very small and with high performance whose aim is to filter the fuel during gaseous phase. It is placed between reducer and injectors rail and keeps all solid, oily or other impurities that can be affect the efficiency of gas injectors. OPERATION The task of the ECU is to translate the petrol ECU will in a gas operation that perfectly corresponds to the petrol one. During the gas operation, petrol injection times are read by Sequent 56 ECU and, according to the received information on gas pressure and temperature and other parameters, converts them in injection timing for the gas injectors to supply the correct quantity to the engine. The gas ECU carries out the gas injection on the same cylinder for which the injection timing for the petrol has been taken and with a negligible delay. By doing this, the petrol ECU continues to control the engine managing the strategies the car manufacturer designed for each rpm and engine load conditions. The out of rpm, the cut-off release, the traction control, the injectors cut-off on the cylinders where the ignition is not operated and the carburettor control during the canister draining phase, the control for the air conditioning operation, the changes of the power steering load, electric loads, full load enrichments, etc are maintained and managed as usual. The result is a very good driving in all conditions with a power loss that is not relevant. The changeover is completely automatic and sequential in order to reduce jerking at idling or fast and unpleasant torque changes according to a strategy patented by BRC. The system is able to recognise if it is not possible to correctly feed the engine because of gas lack or because of low pressure in the gas supply. In this case, with the changeover switch on gas position (right position) the system automatically changes to petrol (in these conditions the vehicle could run with petrol for short moments) The system can automatically change to gas if it recognises to be able to correctly feed the engine. If, on the contrary, the system is not able, an acoustic signal and the switching on of the changeover switch red led will inform the driver about that. The acoustic signal can be deactivated by clicking the switch on petrol position (left position). At this point it is necessary to fill up the tank to normally run the vehicle with gas. The gas-petrol changeover strategy can be also adopted to optimise the vehicle operation but only in particular cases and for very short instants.

2 TA01Z019I Uff. P&P MTM Modular Common Rail System for Gas for cylinder vehicles

3 SEQUENT56 M o d u l a r C o m m o n R a i l S y s t e m f o r G a s Multipoint sequential injection system for cylinder vehicles MTM s.r.l. Via La Morra, Cherasco (Cn) - Italy Tel Fax h t t p : / / w w w. b r c. i t E - m a i l : i n f b r c. i t

4 MULTIPOINT SEQUENTIAL INJECTION SYSTEM FOR CYLINDER VEHICLES COMPONENTS CHARACTERISTICS LPG Sequent 24/56 Genius MAX Reducer/Vaporizer Build up with single stage with diaphragms Adjusted pressure: 150 kpa as for the suction manifold pressure No need of draining operations Maximum fed engine power with SEQUENT 56: 240 kw Approval: R67-01 WATER TEMPERATURE SENSOR RETROACTION VAPORISED LPG LPG INLET LPG Sequent 24/56 Genius Reducer/Vaporizer Build up with single stage with diaphragms Adjusted pressure: 120 kpa o 150 kpa as for the suction manifold pressure No need of draining operations Maximum fed engine power with SEQUENT 56: 140 kw Approval: R67-01 VAPORISED LPG LPG INLET WATER WATER LPG OUTLET LPG INLET TEMPERATURE SENSOR BRC IN03 Electro-injector BOTTOM FED Floating frictionless shutter Impedance: 2.04 Ω / 2.35 mh a 20 C Temperature: -40 C 120 C Tension: 6 V 16 V Seal: Rubber on metal Approval: R67-01; R110 LPG fed powers Genius SQ 24/ Genius MAX SQ 24/56 Inj. Normal Type Vacuum 23 kw/cylinder - Supercharged 28 kw/cylinder - Inj. Max Type Vacuum 30 kw/cylinder 30 kw/cylinder Supercharged 36 kw/cylinder 36 kw/cylinder Inj. Super Max Type Vacuum 35 kw/cylinder 35 kw/cylinder Supercharged 42 kw/cylinder 42 kw/cylinder Values are by way of example only.

5 MULTIPOINT SEQUENTIAL INJECTION SYSTEM FOR CYLINDER VEHICLES COMPONENTS CHARACTERISTICS Microcontroller automotive 32 bit 20 MHz Operative temperature: -40 C C Sealing for Immersion Compliance to the automotive rules for the protection and in/out signals Operative tension: 6.5 V 18 V Sensors and actuators diagnosis compatible with EOBD Communication and reprogramming from PC through K line Support the communication protocol KWP2000 Support communication CAN 2.0 EMC compliance Piloting: up to 8 injectors Integrated injectors cut and emulation Approval: R67-01 Sequent 56 ECU Weight: 17 grams Overall dimensions: ø= 22 mm, h= 54 mm with rubber holder Integrated connector Accuracy 1,5 % F.S. Operative temperature -40 C 120 C Outlet 0 5 V Gas temperature sensor Weight: 160 grams Overall dimensions: 28,2 mm x 62,7mm x 74,3mm Pressure Range: 0 2,5 bar Integrated connector Accuracy 1,5 % F.S. Operative temperature -20 C 120 C Outlet 0 5 V Pressure sensor P1 Filter with cartridge Loss of pressure: 35 kpa with Q= Nl/h air Approval: R67-01; R110 FJ1 HE Gaseous Phase filter

6 SEQUENT 56: MULTIPOINT SEQUENTIAL INJECTION SYSTEM FOR CYLINDER VEHICLES SYSTEM PERFORMANCES High performance, reliability and fast installation. Sequent 56 is the new multipoint sequential system in gaseous phase for cylinder vehicles made by BRC. LPG Sequent 56 Multipoint Sequential injection System proved to obtain very good results as emission levels satisfying the strictest anti-pollution norms that are compulsory for last generation vehicles. Mercedes CLS 500 Euro 4 LPG Petrol LPG power comparison Mercedes CLS 500 Euro 4 LPG Emission cycle ECE-EUDC Power with petrol (kw) Power with LPG (kw) (kw) Emissions (g/km) Euro 4 limits (g/km) (rpm) THE INTERFACE SOFTWARE SEQUENT is a versatile system thanks to powerful interface software developed by BRC. With a PC the software allows communicating with Sequent 56 ECU and entering all the functions. Sequent 56 ECU programming. The ECU programming to reach a correct vehicle operation is simple and fast when the maps are already available on BRC Internet site or at the dealers or from previous installations made by the installer. A simple and guided procedure allows developing autonomously the maps for those vehicles when these are not yet available. Set up. The maps improvement, the driving and power refining when necessary, the adaptation of the available maps for different vehicles are open functions. Thanks to these, the installer has direct access to many of the set up parameters allowing obtaining very goods results even in difficult vehicles. Diagnostic. Thanks to diagnostic functions it is easy to control the correct installation or cause of a possible problem. The possibility to operate the actuators to control the correct operation, the display as numbers and graphic of all data of the system operation, makes this interface software an instrument able to make complex operations very simple. Offline/utility. A series of functions, even if disconnected from the ECU, allows the review and change of previously recorded data and maps organising a file or preparing a further work.