manuale per l'installatore - 1/3 tipologie d'installazione - 2/3 software ...

More documents

Recommendations

Info

2.Second gas map To start the acquisition of the first gas map, click on Start at the bottom left. At the bottom of the screen there is a red writing as shown in picture 4.23 asking to manually change to gas and wait for stready conditions (condition=3). The program waits for the operator, carrying the map out, changes to gas operation with the Gas/Petrol changeover switch. Only after this change-over the vehicle begins to be fed with gas following the initial map which has been downloaded at the end of the petrol map (see picture 4.24). This phase is extremely difficult and delicate because the initial gas map, downloaded from the ECU, could be very far from the correct one. The initial map is obtained from the gasoline map through the multiplicative coefficient shown at the top right (picture 4.32). As we do not know the correct value of this coefficient, different for each vehicle, it is possible the engine stops after the change-over. If it happens, there is no data loss and it is possible to start again from the point the selfmapping was left before the accidental stop. As general suggestion in order to avoid this inconvenience, remember that if the change-over is executed keeping the engine rpm not too low (i.e. 2000 or 3000 rpm), lightly accelerating, it is difficult this stop occurs for a carburation defect. When the change-over is carrying out during vehicle movement and in gear, the accidental stop is not possible as Pic. 4.23 - Aided Procedure – first gas map beginning Pic. 4.24: Aided Procedure – first gas map the vehicle motion inertia will keep the engine rotation and in this lapse of time the technician can change to petrol before the stop. If this stratagem is not sufficient to avoid engine stopping, it will be necessary to start again from the petrol self-mapping (picture 4.32) introducing different values for the multiplicative coefficient and clicking Compute till you find the value which allows the engine to stay on. The value of the multiplicative 26 coefficient has to be increased if the vehicle stops after the engine flooding or too rich carburation. The reason of the stop can be deduced from the oxygen sensor behaviour immediately after the change-over or before the stop. During the self-mapping phase we strongly suggest the use of instruments able to display fast evolution of the oxygen sensor signal (Jolly or Diagnostic Box). A typical value of the multiplicative coefficient to start from is about 0,80.
Achieving the stationary conditions, the program begins to calculate the best fuel quantity to supply according to the engine operation conditions. During this phase try to keep the operation conditions more constant as possible (standstill accelerator and constant rpm). The red writing of the screen disappears and in the % Map Error cell we have a numerical value indicating the entity of the correction executed by the program to achieve ideal carburation conditions (see picture 4.25). While the program achieves a more precise correction, the map error decreases till it is less than the set maximum error (this latter could be set through OTHER). When it occurs, the multiplicative coefficient cell changes from red to green and the initial value changes too (see picture 4.30 whose value decreases from 0,80 to 0,79). Wait for a few seconds to be sure the new multiplicative coefficient value (0,79 in picture 4.26) is fixed then click on Stop and download the new map obtained from the petrol one and the new multiplicative coefficient. You will be asked to change to petrol (condition = 2 or 1) so set the changeover switch in the petrol position to make the map download in the ECU possible. The other cells in this screen have the following meaning: • Petrol Duty-cycle inj.: shows the duty cycle taken from the petrol injectors (cut and emulated). Pic. 4.25 - Aided Procedure – first gas map after change-over Pic. 4.26 - Aided Procedure – complete first gas map • Reference Duty-cycle: shows the petrol duty cycle value expected by the map in that point. • % Map error: shows the medium shifting between the petrol duty cycle and the reference one; it is positive if the petrol inj. duty cycle is bigger than the reference one that usually means the gas map is lean or the petrol map has too low values. • Lambda1: it has the same 27 meaning of the petrol self-mapping.
Page 1 and 2: TA010976B - N. 4 del 11.11.2002 M.T
Page 3 and 4: 5. SETTING UP 4.2.1.8.1 PETROL MAP
Page 5 and 6: INTRODUCTION WHAT IS THE PROGRAM FO
Page 7 and 8: 1. WHAT DO YOU NEED TO START? Brief
Page 9 and 10: 2. SOFTWARE INSTALLATION AND HARDWA
Page 11 and 12: 3. STARTING OF THE PROGRAM AND ITS
Page 13 and 14: main function. To better understand
Page 15 and 16: screen. There are two types of prog
Page 17 and 18: need to install two (refer to insta
Page 19 and 20: 3. Click on the Acquire key to memo
Page 21 and 22: If the automatic procedure took a k
Page 23 and 24: 4.2.1.7 FSF file Saving This is the
Page 25: 3.Second gas map Only the first fil
Page 29 and 30: ation points. These latter, represe
Page 31 and 32: • Anytime it is possible to stop
Page 33 and 34: The tick marks the files which will
Page 35 and 36: BE CAREFUL!: • If the loader prog
Page 37 and 38: • TPS Calibration. • Oxygen sen
Page 39 and 40: then click on EXIT to continue. If
Page 41 and 42: following steps (picture 5.10): 1.T
Page 43 and 44: 5.5 CHANGE-OVER This screen allows
Page 45 and 46: ehaviour. 1000 corresponds to use a
Page 47 and 48: %Error value. A map can be consider
Page 49 and 50: At the top of the graphs and the nu
Page 51 and 52: 6.1.5 PAGE EXIT Use the sixth key f
Page 53 and 54: 6.3 ECU VERSION With DIAGNOSTIC key
Page 55 and 56: sion speed. If there are not partic
Page 57 and 58: the key contact. 7. Select “LPG
Page 59 and 60: ated with the same name it has when
Page 61 and 62: If necessary, after the DOWN- LOAD,

manuale per l'installatore - 1/3 tipologie d'installazione - 2/3 software ...

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?