- ons 14 dec 2016, 13:03
#1132613
OK. Det går alltså att få det att fungera med "fel" CPM. Men någon skillnad i funktionen finns säkert eftersom det uppenbarligen finns två olika artikelnummer för CPM och de med all sannolikhet inte svarar mot exakt samma del.
I VIDA hittar jag en uppsättning parametrar som rör värmarstyrningen och dessa skiljer sig på en rad punkter mellan äldre värmare med tillhörande CPM (modell 952) och senare värmare med tillhörande CPM (912). Här är de punkter som skiljer plus beskrivning av vad statussiffrorna står för:
Additional heater status, value
Heater operating status:
0: The heater has not started.
1: The heater starts. Heater self test. The glow plug is activated and then the heater fan.
2: The heater starts and the fuel pump is active. The control module awaits combustion for a certain period of time.
3: The heater runs. Normal heater operation.
4: The heater stops. The flame goes out.
5: The heater waits. Waiting for the engine coolant temperature to be low enough for the heater to start again.
6: The heater has stopped. The heater only has this status if a fault has occurred.
7: The flame is extinguished.
8: Residual heat. If, when the outside temperature is low, the driver is in the car and turns on the heater, the water pump starts in order to heat the passenger compartment.
9: Fuel pump activated. Used in production.
10: Activating the fuel pump. Used to avoid problems with the fuel pump sticking.
Coolant temperature, value
The coolant temperature in the heater.
For cars manufactured up to week 38, 2001 inclusive:
The heater cycles between 76 -89 °C (status 5).
For cars manufactured from week 39, 2001 inclusive:
The heater cycles between 76 -93 °C (status 5).
Actual combustion fan speed, value
Measurement range 0 - 8000 rpm.
For cars manufactured up to week 38, 2001 inclusive:
Normal rpm approx. 4000-4500 rpm as well as at high rpm, approx. 8000 rpm.
For cars manufactured from week 39, 2001 inclusive:
Normal rpm approx.5000 rpm as well as at high rpm, approx. 8000 rpm.
Fuel pump frequency, value
Measurement range 0-10 Hz.
Reading off the pump frequency of the fuel pump.
For cars manufactured up to week 38, 2001 inclusive: In status no. 2 the pump operates at 4.9 Hz for diesel and 5.5 Hz for petrol.
Cars manufactured from week 39, 2001 inclusive: In status no.2 the pump operates at 5.7 Hz for diesel and 6.8 Hz for petrol.
In status no.3 the pump is controlled by the water temperature. In status nos. 4 and 7 the fuel pump is switched off (0 Hz). The fuel pump is not active in status nos. 1, 7, 5, 6 or 8.
Degree of modulation of Glow plug, value
Measurement range 0-100%.
Reading of the degree to which the glow plug is activated.
For cars manufactured up to week 38, 2001 inclusive:
In status no. 1 the glow plug is supplied completely (100%) or pulsed with the frequency 1 Hz. The degree of modulation of the glow plug depends on the voltage.
For cars manufactured from week 39, 2001 inclusive:
In status no. 1 the glow plug is supplied completely (100%) or pulsed with the frequency 10 Hz. The degree of modulation of the glow plug depends on the voltage.
Gissningsvis är det väl CPM snarare än CEM som hanterar styrningen på den här detaljnivån, eller vad tror du? CEM måste förstås berätta för CPM om bilen är en diesel eller inte eftersom CPM är densamma för bensin- och dieselbrännare. Men detaljstyrningen tar väl sedan CPM hand om, möjligen efter att ha fått ytterligare information från CEM om vilka parametrar den skall använda?
I VIDA hittar jag en uppsättning parametrar som rör värmarstyrningen och dessa skiljer sig på en rad punkter mellan äldre värmare med tillhörande CPM (modell 952) och senare värmare med tillhörande CPM (912). Här är de punkter som skiljer plus beskrivning av vad statussiffrorna står för:
Additional heater status, value
Heater operating status:
0: The heater has not started.
1: The heater starts. Heater self test. The glow plug is activated and then the heater fan.
2: The heater starts and the fuel pump is active. The control module awaits combustion for a certain period of time.
3: The heater runs. Normal heater operation.
4: The heater stops. The flame goes out.
5: The heater waits. Waiting for the engine coolant temperature to be low enough for the heater to start again.
6: The heater has stopped. The heater only has this status if a fault has occurred.
7: The flame is extinguished.
8: Residual heat. If, when the outside temperature is low, the driver is in the car and turns on the heater, the water pump starts in order to heat the passenger compartment.
9: Fuel pump activated. Used in production.
10: Activating the fuel pump. Used to avoid problems with the fuel pump sticking.
Coolant temperature, value
The coolant temperature in the heater.
For cars manufactured up to week 38, 2001 inclusive:
The heater cycles between 76 -89 °C (status 5).
For cars manufactured from week 39, 2001 inclusive:
The heater cycles between 76 -93 °C (status 5).
Actual combustion fan speed, value
Measurement range 0 - 8000 rpm.
For cars manufactured up to week 38, 2001 inclusive:
Normal rpm approx. 4000-4500 rpm as well as at high rpm, approx. 8000 rpm.
For cars manufactured from week 39, 2001 inclusive:
Normal rpm approx.5000 rpm as well as at high rpm, approx. 8000 rpm.
Fuel pump frequency, value
Measurement range 0-10 Hz.
Reading off the pump frequency of the fuel pump.
For cars manufactured up to week 38, 2001 inclusive: In status no. 2 the pump operates at 4.9 Hz for diesel and 5.5 Hz for petrol.
Cars manufactured from week 39, 2001 inclusive: In status no.2 the pump operates at 5.7 Hz for diesel and 6.8 Hz for petrol.
In status no.3 the pump is controlled by the water temperature. In status nos. 4 and 7 the fuel pump is switched off (0 Hz). The fuel pump is not active in status nos. 1, 7, 5, 6 or 8.
Degree of modulation of Glow plug, value
Measurement range 0-100%.
Reading of the degree to which the glow plug is activated.
For cars manufactured up to week 38, 2001 inclusive:
In status no. 1 the glow plug is supplied completely (100%) or pulsed with the frequency 1 Hz. The degree of modulation of the glow plug depends on the voltage.
For cars manufactured from week 39, 2001 inclusive:
In status no. 1 the glow plug is supplied completely (100%) or pulsed with the frequency 10 Hz. The degree of modulation of the glow plug depends on the voltage.
Gissningsvis är det väl CPM snarare än CEM som hanterar styrningen på den här detaljnivån, eller vad tror du? CEM måste förstås berätta för CPM om bilen är en diesel eller inte eftersom CPM är densamma för bensin- och dieselbrännare. Men detaljstyrningen tar väl sedan CPM hand om, möjligen efter att ha fått ytterligare information från CEM om vilka parametrar den skall använda?
Nuvarande Volvo: V70 T5 -02 Geartronic; V70 D4 -15 Geartronic
Tidigare Volvo: 145 DL -72 B20D man; 245 DL -75 B21A man; 745 GL -87 B230F man; 855 T5 -94 aut
Tidigare övriga: Saab 99 -71 1,7 man; Volkswagenbuss T1 -66 man; Cadillac Coupe de Ville -75 aut
Tidigare Volvo: 145 DL -72 B20D man; 245 DL -75 B21A man; 745 GL -87 B230F man; 855 T5 -94 aut
Tidigare övriga: Saab 99 -71 1,7 man; Volkswagenbuss T1 -66 man; Cadillac Coupe de Ville -75 aut