Sequent PLUG & DRIVE LPG and CNG

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LPG and CNG Concetti Base dei Sistemi Sequent.
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Presentation transcript:

Sequent PLUG & DRIVE LPG and CNG Concetti Base dei Sistemi Sequent

Sequent Plug & Drive Sequent Plug & Drive is the new system for LPG/CNG conversion developped by BRC. Designed on the basis of the previous Sequent systems but characterised by a totally new approach of gas flow management. Main innovation is in the software for engine management. Thanks to its new algorithms, it allows an optimised feeding of gas fuel, in a simply and intuitive way. Some of more advanced functions have been integrated and others have been added in order to simplify the calibration procedure. Concetti Base dei Sistemi Sequent

SEQUENT PLUG & DRIVE – LPG KIT Into the kit LPG Solenoid valve ET98 Genius MB/Max reducer (water temperature sensor 2 poles) Fuel Rail with BRC injectors and PTS sensor (brown connector) MAP Sensor with integrated connector (grey) ECU Harness Change-over switch one-touch with buzzer Gas filter FJ1 HE Out of the kit Harness for petrol injector cutting (dx, sx, etc.) High pressure pipe (copper or flexible at choice) Concetti Base dei Sistemi Sequent

LPG SYSTEM Concetti Base dei Sistemi Sequent

SEQUENT PLUG & DRIVE – CNG KIT Into the kit VM A3/E solenoid valve Zenith reducer (water temperature sensor 2 poles) Fuel Rail with BRC injectors and PTS sensor (black connector) MAP Sensor with integrated connector (grey) ECU Harness Change-over switch one-touch with buzzer Out of the kit Harness for petrol injector cutting (dx, sx, etc.) High pressure pipe (copper or flexible at choice) Filling nozzle Concetti Base dei Sistemi Sequent 5

CNG SYSTEM Concetti Base dei Sistemi Sequent 6

HARNESS Il cablaggio è totalmente nuovo. Concetti Base dei Sistemi Sequent

HARNESS Optional “In case of need” To connect Power Ignition on Connection to OBD plug depending on type of connection Lambda oxygen sensor IN “In case of need” Lambda oxygen sensor OUT External timing advancer (for CNG) RPM signal Connection 6-7-8-9 1-2-3 Type CAN BUS K LINE PIN 6 - 14 7 Concetti Base dei Sistemi Sequent

NEW GAS ECU HARDWARE INNOVATION SOFTWARE INNOVATION Communication with new change-over switch and PC on same K line Communication with petrol OBD on K line or dedicated CAN Output for timing advancer external unit (for CNG) SOFTWARE INNOVATION Totally revised Injection Control Self-mapping Leaning in Open Loop Tip-in / Tip-out and Setup already activated New functions thanks to communication to OBD. Concetti Base dei Sistemi Sequent

WHAT’S NEW: what you can see Concetti Base dei Sistemi Sequent

WHAT’S NEW: what you CAN’T see Improvement in Fuel Control management Improvement in RPM reading from petrol injector’s Ton: consequently, RPM signal is no more necessary A new grafic for the interface sw has been created with same lay-out with all other Sequent systems Concetti Base dei Sistemi Sequent

BASIC CONCEPTS Sequent PLUG & DRIVE system Concetti Base dei Sistemi Sequent

INSTALLATION AND CALIBRATION PROCEDURE FOR SEQUENT PLUG & DRIVE IS VEHICLE OK? DRIVEABILITY À : REFINE TIP-IN, TIP-OUT, RETURN TO IDLE YES SELF MAPPING NO IS VEHICLE OK? (TIP-IN, TIP-OUT, RETURN TO IDLE) NO Rimarcare il concetto che il controllo mappa del SP&D non ha lo stesso peso che aveva sul FastNess. Qui è solo un controllo che l’automappatura sia andata a buon fine e da esperienza fatta non bisogna più fare modifiche sostanziose alla mappa. DRIVEABILITY: O.L. STRATEGY CHECK MECHANICAL INSTALLATION CHECK THE MAP AND VEHICLE PERFORMANCE NO IS VEHICLE OK? (OPEN LOOP condition) YES DELIVER THE CAR TO CUSTOMER YES Concetti Base dei Sistemi Sequent

Injection: Calculation Petrol INJECTOR +12 V GAS EQUIPMENT CARACTERISATION BRC injectors characteristics Current contacts with: OEM: VW China Citroen China DOEM: Mercedes Italy P1 T gas +12 V Gas INJECTOR +12 V TonP reading Step1 GAS flow calculation Step2 Ton G calculation Step3 Orange Violet PETROL flow calculation TonP TonG Petrol flow Gas flow MAP GAS ECU Petrol ECU Concetti Base dei Sistemi Sequent

SELF-MAPPING PROCEDURE SEQUENT PLUG & DRIVE START PROCEDURE SELECT TYPE EQUIPMENT (Step 1) SETUP EQUIPMENT AND TYPE OF INJECTORS (Step 2) La procedura Personalizzata Guidata è sempre la stessa, cambia solo l’automappatura. SAVE FILE .FPD (Step 3) SELF-MAPPING (Step 4) SAVE FILE .FPD (Step 5) END OF PROCEDURE Concetti Base dei Sistemi Sequent

SELF-MAPPING Concetti Base dei Sistemi Sequent

Sequential Change-over SELF-MAPPING Start procedure … what’s 1st Correction Gas Map? Idle in petrol 3 accelerations Sequential Change-over Automatic from Petrol to Gas: 1st Correction Gas Map Concetti Base dei Sistemi Sequent

1st Correction Gas Map 1° STEP 2° STEP 3° STEP 4° STEP Gas Injector switched Gas map error 1° STEP 2° STEP 3° STEP 4° STEP Concetti Base dei Sistemi Sequent

Switch to gas: 2° Correction Gas Map Sequential Change-over SELF-MAPPING Start procedure End procedure 3° Correction Gas Map OK Idle in petrol CHECK DATA GAS MAP KO Il KO sta ad indicare quello che nel FastNess indicava: l’automappatura ha dato esito negativo. Nel SP&D questo non avviene più, il sistema corregge da solo il problema. 3 accelerations Switch to gas: 2° Correction Gas Map Sequential Change-over Automatic from Petrol to Gas: 1° Correction Gas Map Switch to Petrol Concetti Base dei Sistemi Sequent

MANUAL CHECKING GAS MAP Concetti Base dei Sistemi Sequent

CLOSE LOOP = Map refinement Correction at medium and high power Correction at idle Il procedimento è lo stesso già visto e rivisto nel programmi Sequent. Fare attenzione alla salita del MAP nel passaggio a CNG dovuto al decadimento della coppia e alla conseguente apertura della farfalla da parte della centralina benzina. OBD parameters bank 1 OBD parameters bank 2 Concetti Base dei Sistemi Sequent

CLOSED LOOP = Map refinement Gear correction Correction at idle Il procedimento è lo stesso già visto e rivisto nel programmi Sequent. Fare attenzione alla salita del MAP nel passaggio a CNG dovuto al decadimento della coppia e alla conseguente apertura della farfalla da parte della centralina benzina “Easy Refinement” OBD parameters bank 1 OBD parameters bank 2 Concetti Base dei Sistemi Sequent Concetti Base dei Sistemi Sequent 22

CLOSED LOOP = Map refinement In ALTRO abbiamo le stesse cose dei vecchi impianti ed hanno lo stesso significato CNG map parameter Ton at idle (in Gas operation) Concetti Base dei Sistemi Sequent Concetti Base dei Sistemi Sequent 23

Map refinement @ idle Strategia di affinamento del minimo. Cliccando sul pulsante il sistema effettua una correzione automatica del minimo senza carichi seguendo la procedura già vista in automappatura. In automatico commuta a CNG un’iniettore alla volta ed effettua il centraggio. Concetti Base dei Sistemi Sequent Concetti Base dei Sistemi Sequent 24

Ride “Easy Refinement” Affinamento facilitato: cliccando sul apposito pulsante il sistema presenta questa videata, dove possiamo far partire l’affiamento mappa facilitato in marcia. Per far iniziare la procedura bisogna premere START Concetti Base dei Sistemi Sequent Concetti Base dei Sistemi Sequent 25

“Easy Refinement”: points on petrol Il sistema incomincia ad acquisire per ogni valori di Map il TonB che la vettura calcola per dare una dosatura stechiometrica . Bisogna effetturare delle accelerazioni lente e continue da 1000 a 3000 giri, cercando di acquisire dati in un range di MAP tra 300 a 900 mbar, con l’accortezza di non entrare in condizione di Open Loop . Una volta acquisito i TonB nel funzionamento benzina commutare a CNG Concetti Base dei Sistemi Sequent Concetti Base dei Sistemi Sequent 26

“Easy Refinement”: points on gas Con lo stesso procedimento di prima bisogna spazzolare tutti i valori di MAP possibili acquisendo il TonB nel funzionamento Gas. Una volta finito l’acquisizione premere Stop. Se la mappatura gas è centrata avremo i punti arancioni (TonB nel funzionamento Benzina) sovrapposti con quelli Blu ( TonB nel funzionamento Gas). Se si discostano bisogna agire sul cursore Marcia con la stessa legge già conosciuta: Se punto arancio è più alto del punto Blu bisogna smagrire la mappa. Se il punto arancio è più basso di quello Blu bisogna arricchire Concetti Base dei Sistemi Sequent Concetti Base dei Sistemi Sequent 27

“Easy Refinement”: gas map modification Concetti Base dei Sistemi Sequent

“Easy Refinement”: gas map modification Concetti Base dei Sistemi Sequent

Important concepts Map Refinement – Close Loop Warning! Important concepts Map Refinement – Close Loop Idle control: taking into consideration MAP variation and checking Lambda sensor trend, check that, when switching from petrol to gas, TonP is still the same. When possible, connect EOBD tester to check self-adapting parameters Gear control: check the map with TonP more than that at idle. I.e. 9-10 ms If connection to EOBD plug is present, check the self-adapting parameters Ton Min Gas = value of TonP at idle during gas mode Map parameters: after map refinement, always check that numeric value of Q is negative (<0). If positive, some flow will be delivered by gas injectors even when petrol ECU is in cut-off (TonP=0) Concetti Base dei Sistemi Sequent

SETUP Concetti Base dei Sistemi Sequent

DRIVEABILITY Concetti Base dei Sistemi Sequent

BEFORE STARTING A DRIVEABILITY SETUP, BE SURE THAT GAS FLOW IS CORRECT CHECKING IT BY MAP REFINEMENT. Concetti Base dei Sistemi Sequent

OPEN LOOP = Leaning in O.L. In the Closed Loop management, the petrol injection supplies the optimal fuel quantity in order to obtain a stoichiometric mixture (QPStoich.). The gas flow (QG) is calculated starting exactly from this petrol quantity. QPStoich. QG In the Open Loop management of the petrol injection, the stoichiometric conditions are usually abandoned in favour of a mixture richer in petrol (QBStoich.+ ENO.L.), of considerable percentages too (for instance 30%). QPStoich. + ENO.L. QG + ENO.L. For instance: QPStoich. + 30% QG + 30% Concetti Base dei Sistemi Sequent

OPEN LOOP = Leaning in O.L. Working of the leaning in O.L. strategy The aim of the leaning in O.L. strategy is to limit the enrichment with which the petrol setup is calibrated for the working in Open Loop. QPStoich. + ENO.L. QG On the basis of the parameters acquired during the self-mapping, the strategy recalculates in a independent way the optimal petrol quantity (QPoptimal) needed to keep a rich calibration for the Open Loop condition, but limited compared to the original one. However, enrichment is always possible if needed. (EN LIMIT). QPOptimal (Rich) = QPStoich + EN LIMIT Concetti Base dei Sistemi Sequent

OPEN LOOP = Leaning in O.L. When the leaning in O.L. strategy is enabled, system compares the Real Petrol Flow to the Optimal Limited one (recalculated by Plug&Drive system) to select on which one calculate the Gas flow. When petrol ECU, working on gas, requires an higher enrichment compared to the Optimal Limited one, Sequent P&D will calculate gas flow starting from the Optimal Limited. > QPStoich. + ENO.L. QPOptimal (Rich) QG If the Real Petrol Flow required by petrol ECU is lower than the Optimal Limited one, Sequent P&D will not make any cutting and gas flow will be calculated on the Real Petrol Flow < QPStoich. + ENO.L. QPOptimal (Rich) QG Concetti Base dei Sistemi Sequent

OPEN LOOP = Leaning in O.L. Concetti Base dei Sistemi Sequent

OPEN LOOP = Leaning in O.L. Description: Vertical line is RPM indication. BLUE line is the calculated amount of petrol without “Wall Wetting” strategy (Optimal Limited) red points are values of lambda oxygen sensor, acquired during self-mapping green points are actual fuel quantity required by petrol ECU. If green points are above the blue line, strategy actually leans, down taking the fuel quantity to the blue points level, instead of level of green points For RPM in which green points are below of the blue line, leaning is not done and gas quantity is the same required by petrol ECU, that of green point Concetti Base dei Sistemi Sequent

OPEN LOOP = Leaning in O.L. Concetti Base dei Sistemi Sequent

OPEN LOOP = Leaning in O.L. Concetti Base dei Sistemi Sequent

Tip-in / Tip-out La centralina effettua degli arricchimenti in fase di accelerazione che a CNG creerebbero dei problemi di guidabilità. Noi limitiamo questi arricchimenti con questa strategia. Ovviamente il peso dello smagrimento dipende da che tipo di incremento mappa attua la centralina benzina. Es. se in un attacco, la centralina benzina incrementa la mappa del 10%, non avrebbe senso smagrirla del 25%. Il sistema attua uno smagrimento proporzionale all’incremento benzina. Rimarcare che tutte le strategie di messa a punto attuano modifiche al valore di Portata Benzina necessaria a calcolare la nostra portata CNG. Concetti Base dei Sistemi Sequent

Cold Strategy Durante la condizione di macchina fredda, la centralina benzina comanda degli arricchimenti maggiori rispetto a quando la vettura è calda. Quindi abbiamo la necessità di avere due tipi di transitori, uno per il caldo e l’altro per il freddo. Ovviamente il transitorio freddo smagrisce di più di quello caldo. Sotto la Soglia temperatura Inferiore (40°C) il sistema usa i transitori freddi (-35%), sopra alla Soglia Temperatura Superiore (80°C) il sistema usa quello a caldo (-25%). Tra le due temperature raccorda i due diversi smagrimenti (Es. da -35% a -25%) Rimarcare che se io modifico il transitorio a caldo, il sistema automaticamente modifica della stessa quantità quello a freddo. Es. se io porta da -25% a -35% quello caldo , il sistema porta da -35% a -45% quello freddo. Viceversa no, quindi se io cambio solo quello freddo, il sistema non modifica quello caldo. Concetti Base dei Sistemi Sequent

Return to Idle Il RITORNO AL MINIMO IN USCITA CUT-OFF. In uscita da Cut off il sistema PLUG & DRIVE riconoscerebbe un transitorio in quanto si passa da un valore basso di portata benzina ad un valore più alto. Questo porterebbe uno smagrimento mappa del valore del transitorio, cosa che creerebbe uno smagrimento troppo grande nel ritorno al minimo. Abbiamo la necessità di avere uno smagrimento differente. La strategia quindi comporta questo smagrimento differente se il sistema riconosce che vi è una variazione di portata benzina da 0 ad un valore positivo. (Uscita da Cut Off) Concetti Base dei Sistemi Sequent

DATA MONITORING Concetti Base dei Sistemi Sequent

Data Monitoring Concetti Base dei Sistemi Sequent

EOBD PARAMETERS Concetti Base dei Sistemi Sequent

EOBD Parameters I PID di Default sono quei parametri OBD che la centralina Benzina può offrire. I PID richiesti sono i parametri OBD che effettivamente il sistema Sequent PLUG&DRIVE richiede alla centralina benzina. Concetti Base dei Sistemi Sequent

Resuming Table for EOBD connections Tester EOBD (N° Connection) Communication Protocol Type connection Pin to connect Availability Communication SP&D 1 ISO 9141 slow K LINE 7 YES 2 ISO 14230 fast 3 ISO 14230 slow 4 SAE J1850 VPM -- NO 5 SAE J1850 PWM 6 CAN 250 Kbit/s – 11 bits CAN BUS 6 - 14 CAN 250 Kbit/s – 29 bits 8 CAN 500 Kbit/s – 11 bits 9 CAN 500 Kbit/s – 29 bits 6 – 14 Concetti Base dei Sistemi Sequent

EOBD Parameters Connection to EOBD PLUG is not necessary for the good working of the vehicle in gas. Some parameters read by EOBD plug are used by Sequent PLUG & DRIVE for further refinement of the fuel control. In addition, these parameters make it easier the manual refinement of gas map, showing the value of the self-adapting parameters in the Map Refinement page. EOBD parameters are also shown and should be recorded during the normal acquisition of gas paramenters in Data Monitoring page. Concetti Base dei Sistemi Sequent

ECU VERSION Concetti Base dei Sistemi Sequent

SEQUENT PLUG & DRIVE ECU LIFE FORCED GAS STARTING COUNTER ECU Version Per far funzionare la strategia di Avviamento d’emergenza bisogna : inserire il contatto chiave. tenere premuto il commutatore BRC per circa dieci secondi. si sentono scattare l’EV, suona il buzzer e il led del commutatore diventa verde. entro 5 sec. bisogna fare avviamento. Il. N. avviamento forzato gas sale di un’unità. Se si aspettano più di 5 secondi il sistema ritorna in automatico alla partenza benzina. SEQUENT PLUG & DRIVE ECU LIFE FORCED GAS STARTING COUNTER Concetti Base dei Sistemi Sequent

END OF LESSON: Q & A session Concetti Base dei Sistemi Sequent