I find that statement hard to believe ! Maybe for the first few minutes after starting, but every vehicle I have ever seen with "smart" charging will regulate the voltage to the battery to between 13.2V and 13.8V.
Yeah it was all new to me... And ironically doing my tests today as in my video the truck idled itself up when I put that load of 70 amps on it...
Im just amazed that the truck went to a high idle...
I can take screen shots of my various voltages with my OBDII reader.
This is what I got..
There are two
types of RVC systems
used today – integrated
RVC and standalone
RVC (SARVC).
Integrated systems
uses a battery current
sensor to provide a
body controller (BCM)
the amount the battery
is charging or discharging.
Accurate
voltage measurements
are taken
through the battery
positive voltage and
ignition 1-voltage circuits.
The BCM then
communicates information
over serial
data circuits for the
ECM/ PCM to directly
control the generator
Both types of system have two types of corrective
actions to insure the battery stays at an
80% state of charge. These include up to three
levels of load shed and up to three
levels of idle boost operation. Refer to the service
manual Description and Operation for load
shed and idle boost
Read page 1 and 3 here... Shows various charge modes, and desulfation....etc etc... This is better then my other link. I just couldnt find it.
System Operation Not all systems will enter all modes of operation; refer to the applicable service manual for exact Description and Operation. The purpose of the RVC system is to maintain the battery state-of-charge at 80% or above and support vehicle loads. The six modes of operation include: – Charge Mode – Fuel Economy Mode – Voltage Reduction Mode – Start Up Mode – Windshield Deice Mode – Battery Sulfation Mode The PCM/ECM (generator battery control module on full-size trucks) controls the generator through the generator L-terminal control circuit. It monitors the generator performance though the generator field duty cycle signal circuit. The signal is a 5 volt PWM (pulse width modulated) signal of 128 Hz with a duty cycle of 0-100%. Normal duty cycle is between 5-95%. The ranges between 0-5% and 95-100% are for diagnostic purposes. The following table shows the commanded duty cycle and output voltage of the generator: The generator provides a feedback signal of the generator load through the generator field duty Contents 1 Service and Parts Operations September 2004 Volume 6, No.09 c
