Ventricular fibrillation is one type of arrhythmia that can be deadly. It occurs when the heart beats with rapid, erratic electrical impulses. This causes pumping chambers in your heart (the ventricles) to quiver uselessly instead of pumping blood.
A VOLTAGE REGULATOR regulates the charging voltage that the alternator produces, keeping it between 13.5 and 14.5 volts to protect the electrical components throughout the vehicle. There is also a system to warn the driver if something is not right with the charging system.
In summary, the purpose of a propane regulator is to bottleneck the propane down to a safe and usable pressure. An important point to note is that under normal operation, a propane regulator will make a humming noise. This is normal and should not be construed as a problem or regulator malfunction. Types of Propane Regulators