Er hoort inderdaad altijd een lampje te branden, rood, groen of knipperend groen. Bij mij is het lampje groen gaan knipperen na het wisselen van de G2 computer naar G3. Overschakelen inderdaad als je boven de 1500 tpm komt of zo en dan het gas loslaat. Overschakelsignalen zijn inderdaad motortemperatuur, toerental en closed loop draaien. Buitenluchttemperatuur wordt pas bij latere LPE computers gemeten.Dat er niet op LPG gestart wordt heeft er ook mee te maken dat de LPE computer tamelijk dom is en gewoon de benzinecomputer volgt. Bij een steenkoude motor wordt er veel meer benzine ingespoten omdat er onderweg benzine condenseert (de oude choke functie). De LPE computer volgt gewoon en gaat in dat geval ook meer gas inspuiten. LPG condenseert niet en dus krijgt de motor teveel brandstof voor z'n kiezen en zou slechter kunnen gaan lopen.
Zie bijgaand verhaaltje uit:
www.suzukituning.com/General/VialleLPi/V...ual.htm#_Toc26108862
Petrol start and switching time from petrol to LPG
All LPi cars start on petrol. After starting, the engine will run on petrol for some time prior to switching to LPG.
Starting point of the LPi system is the conversion of the petrol injection time to an LPG injection time. The result is that injection takes place according to all values calculated by the original petrol computer, modified for the LPG fuel. This strategy applies to all operating conditions, including the cold start. When the petrol computer during idling applies mixture enrichment, this enrichment mainly depends on the temperature. The main arguments for enrichment are the increased friction resistance and fuel deposition on the cold cylinder wall and the valves. The latter argument does not apply for LPG, because the low boiling point ensures effective evaporation, even at low temperatures. Therefore, the injected LPG quantity is too high, which may cause the engine to stall. Consequently, the switching moment has been made depend on three factors: • The LPE surroundings temperature • The engine temperature • The signal from the l sensor <h2>The LPE surroundings temperature</h2> Beyond software version 205908 the outside air temperature (at the LPE) is measured. This is done with a NTC resistance inside the LPE. This extra parameter provides, in combination with the engine temperature and the l signal, a better determination of the engine temperature,
The engine temperature Cold engine: If the engine has been stopped for more than 3 hours, the switching moment only depends on the outside temperature (LPE) and the delivered signal of the l sensor. The switching time for a cold engine is longer than for a warm engine. Example outside temperature -20 > time 240 seconds 0 > time 120 seconds 20 > time 60 seconds 40 > time 10 seconds Warm engine: If the engine has been stopped for less than half an hour, the engine has fixed switching time. This time is programmed for each application (±5 seconds, not affected by the l-sensor signal) Partially warmed up engine: If the engine is partially warmed up, the switching time is variable between 5 seconds and the cold engine switching time and is influenced by: • Outside- and/or engine temperature • Temperature of the l-sensor • Runtime of the engine in the last drive cycle • Elapsed time since the engine is stopped • Load during last drive cycle (e.g. idle in stead of 120 km/h) <h2>The l-sensor signal</h2> The l-sensor signal provides information on the mixture control under static conditions. When the signal is changing, it can be assumed that mixture control takes place in closed-loop. This means that no mixture enrichment takes place under static conditions. Under those circumstances it is possible to switch to LPG. When the l-sensor signal is of influence (cold start and partial warmed engine), the LPE checks if the l-sensor is regulating. When the LPE has detected 5 cycles, it satisfies the requirement concerning the item l-sensor temperature. When all requirements are met, the LPE switches to LPG. When no l-sensor signal is detected the LPE will switch after 3 to 5 minutes.
Een lampje wat niet brandt icm overschakelen na 20 km is dus niet goed.
Rob
