Fuel-fired auxiliary heater for motor vehicle - has with pulse-operated blower and burner controlled by variable pulse lengths

摘要

The fuel fired heater has a solenoid-operated fuel pump and an electric motor-powered blower. The pump and blower are driven by a square pulse signal, with the relative pulse lengths and spacings adjustable to generate different heating effects. The heater warms the engine coolant system and is controlled by temp. sensors. A process (MC) is linked to pulse generators (ST1, ST2) to generate the pulse and pause periods. The battery voltage is also monitored and variations in voltage are corrected to obtain controlled heating. ADVANTAGE - Variable heating control with optimum efficiency.