A secondary regulator allows the LPG or CNG to expand to a gaseous state. This regulator provides a safety factor and locks out fuel flow in the event of a system failure. The acceleration-deceleration control precisely times the fumigator fuel. If fumigation occurs prematurely on acceleration or is late in turning off on deceleration, fuel is wasted. Late fumigation on acceleration produces a lean, poorly combusted power cycle.
Drivers notice a power lag on acceleration.
This control instantly senses a change in engine load and responds by properly adjusting the fumigation rate for the required diesel-delivery rate. The control output signal results in the opening or closing of the mixer control valve. This valve controls the fumigation fuel flow rate. These tanks must meet state and federal safety requirements. The Diesel Fuel Limit Switch prevents excess fuel delivery when the fumigation system is active.