Bumababa ang voltage kapag naka-on parking/head light

[gtamp]

When you're idling, you can probably just engage your headlights(low beam). No need to turn on your foglights... How's your voltage measurement here?

Also, the compressor cycles on/off,- how is the voltage measurement with the above condition when the compressor disengages?

16.1K:nerves:

switching on the headlights alone eh bumababa na from 13.8 to almost 12.5~13V

then switching on A/C eh almost baba na sya ng 12.1~12.4
then switch off A/C back to 12.5~13V

[gtamp]

Bro.,- when your engine is running,- it is the alternator that supplies the voltage... The battery is practically out of the circuit.

The battery is mainly there to crank the engine when you start it.....

16.1K:nerves:

thanks uli
yun nga din ang pagkakasabi sa akin, once na umandar na yung makina eh yung alternator na gumagana so sa palagay ko dapat hindi baba yung voltage ko kahit naka- idle kase constant speed naman then kahit iswitch on ko mga electrical features ng sasakyan except for A/C tama po ba

[t2erns]

teka nga pala ano bang car itong pinag uusapan natin? may mga cars na variable ang charging rate i.e. alternator is not always running on 100% duty cycle example kung minsan 30%, 40% etc. depending on the demands and other sensor inputs like battery temperature, etc

BTW the battery is always in the circuit not only during starting only. it acts like a big capacitor that filters the electricity para maabsorb ang fluctuating current ng alternator

[EE100shiro]

tumutulong rin yung battery sa mga electronic stuff

[CVT]

teka nga pala ano bang car itong pinag uusapan natin? may mga cars na variable ang charging rate i.e. alternator is not always running on 100% duty cycle example kung minsan 30%, 40% etc. depending on the demands and other sensor inputs like battery temperature, etc

BTW the battery is always in the circuit not only during starting only. it acts like a big capacitor that filters the electricity para maabsorb ang fluctuating current ng alternator

Yup,- the battery by itself is a regulator, but does not act as a source of power when the engine is running, unless the alternator cannot supply enough.

When the engine is running, and the alternator is okay, the battery is actually a 'load' and is being charged by the alternator, while the alternator supplies the power for the vehicle.

When I say "the battery is practically out of the circuit", I meant that "it does not supply power", but rather acts as a load as it is being charged by the alternator, while at the same time, helping to regulate it (you have a regulator with the alternator)...

16.1K:nerves:

[CVT]

tumutulong rin yung battery sa mga electronic stuff

Anong "electronic stuff", bro?

You can say that again...

16.1K:nerves:

[CVT]

switching on the headlights alone eh bumababa na from 13.8 to almost 12.5~13V

then switching on A/C eh almost baba na sya ng 12.1~12.4
then switch off A/C back to 12.5~13V

When you say "switching on the headlights",- is it high beam or low beam, bro?

I suggest you turn on only your low beam. Not too much load on your alternator, and not an irritant to other motorists...

With that I think that you have a fairly stable (electrical) setup....

16.1K:nerves:

[gtamp]

teka nga pala ano bang car itong pinag uusapan natin? may mga cars na variable ang charging rate i.e. alternator is not always running on 100% duty cycle example kung minsan 30%, 40% etc. depending on the demands and other sensor inputs like battery temperature, etc

BTW the battery is always in the circuit not only during starting only. it acts like a big capacitor that filters the electricity para maabsorb ang fluctuating current ng alternator

kia pregio M/T yung sasakyan ko.. thanks sa mga input/comments

sa pagkakasabi sa akin ng mga ibang napagtanungan ko eh kung constant yung rpm so dapat constant din yung output voltage ng alternator.. tama po ba o mali?

so sa pagkakaintindi ko na kung tama dapat kahit anu yung output voltage ng alternator eh kapag nag-switch on ng parking light or headlight dapat hindi baba ang voltage,,, tama po ba o mali?
TIA

[gtamp]

Yup,- the battery by itself is a regulator, but does not act as a source of power when the engine is running, unless the alternator cannot supply enough.

When the engine is running, and the alternator is okay, the battery is actually a 'load' and is being charged by the alternator, while the alternator supplies the power for the vehicle.

When I say "the battery is practically out of the circuit", I meant that "it does not supply power", but rather acts as a load as it is being charged by the alternator, while at the same time, helping to regulate it (you have a regulator with the alternator)...

16.1K:nerves:

thanks uli

so tama po bang sabihin while the engine is running na yung nasusukat ko na voltage sa terminals ng battery is practically the same sa output voltage ng alternator?

[jick.cejoco]

kia pregio M/T yung sasakyan ko.. thanks sa mga input/comments

sa pagkakasabi sa akin ng mga ibang napagtanungan ko eh kung constant yung rpm so dapat constant din yung output voltage ng alternator.. tama po ba o mali?

so sa pagkakaintindi ko na kung tama dapat kahit anu yung output voltage ng alternator eh kapag nag-switch on ng parking light or headlight dapat hindi baba ang voltage,,, tama po ba o mali?
TIA

if the vehicle has original size alternator without additional load, the common voltage with the engine running is between 13.5 to 15.1 volts. it is the job of the voltage regulator (both electromagnetic and electronic voltage regulator). if you changed your alternator, the pulley size must also be the same size. the charging voltage output factors, don't forget, are: rotational speed of the alternator's field coil, input voltage (for field coil excitation), size of the battery, size of the pulley, condition of the accessory belt, electrical loads when the electrical load, the condition of the wires connecting the alternator to the system and their resistance, temperature of the battery and the age and condition of the battery.