Hej
Nån som har koll på vilken frekvens pulserna har som kommer från givaren i bakaxeln ?
Är en 740 -91 och har samma bakaxel som 940.
Pulser till hastighetsmätaren
Re: Pulser till hastighetsmätaren
Hello Disel
My speedometer just came back from the repair service. The testsheet says that the 740/940/850 requires 25793 pulses per kilometer.
Sincerely
Mathy
My speedometer just came back from the repair service. The testsheet says that the 740/940/850 requires 25793 pulses per kilometer.
Sincerely
Mathy
945 GLE model year 1991 B234F
Re: Pulser till hastighetsmätaren
Ok
But that has to be for distance.
I'm more interested in the speed pulses.
What frequency the pulses have at a certain speed.
I found this
Vid 175Hz visar mätaren 30km/h
Vid 440Hz visar mätaren 70km/h
Vid 770Hz visar mätaren 120km/h
Vid 1434Hz visar mätaren 220km/h
But is that for old 740 (before 1988) or for "newer" 740/940 ?
The cog in the rear is either 12 or 48.
But that has to be for distance.
I'm more interested in the speed pulses.
What frequency the pulses have at a certain speed.
I found this
Vid 175Hz visar mätaren 30km/h
Vid 440Hz visar mätaren 70km/h
Vid 770Hz visar mätaren 120km/h
Vid 1434Hz visar mätaren 220km/h
But is that for old 740 (before 1988) or for "newer" 740/940 ?
The cog in the rear is either 12 or 48.
Re: Pulser till hastighetsmätaren
Hello disel
48 cogs is more precise. You need that for ABS. So 48 is for the newer vehicles.
770 Hz = 770 pulses per second = 770 x 60 pulses per minute = 770 x 60 x 60 pulses per hour = 2.772.000 pulses per hour
2.772.000 pulses per hour / 120 km per hour = 23100 pulses per kilometer
You can do the same calculations with the other frequencies and speeds. The result differs each time. But it's close enough.
Sincerely
Mathy
48 cogs is more precise. You need that for ABS. So 48 is for the newer vehicles.
770 Hz = 770 pulses per second = 770 x 60 pulses per minute = 770 x 60 x 60 pulses per hour = 2.772.000 pulses per hour
2.772.000 pulses per hour / 120 km per hour = 23100 pulses per kilometer
You can do the same calculations with the other frequencies and speeds. The result differs each time. But it's close enough.
Sincerely
Mathy
945 GLE model year 1991 B234F