Glow plug temperature control apparatus

Details Glow plug temperature control apparatus Glow plug temperature control apparatus

1979-03-21

1981-08-11

Rubinson, Gene Z.

Electric heating

Heating devices

With power supply and voltage or current regulation or...

219497, 219501, 123179H, 361264, H05B 102

Patent

active

042836190

ABSTRACT:
Glow plugs (16), (17), (18), (19) for a Diesel engine are connected to a power source (12) through a switch (13) to receive electrical power. A time constant circuit including a capacitor (32) and resistors (31), (33) is connected to the power source (12) through another switch (27) together with the glow plugs (16), (17), (18), (19). The time constant circuit is constructed so that the voltage across the capacitor (32 ) is proportional to the temperature of the glow plugs (16), (17), (18), (19). A comparator (34) opens the switches (13), (27) to disconnect the power source (12) from the glow plugs (16), (17), (18), (19) and time constant circuit when the voltage across the capacitor (32) is above a predetermined value and closes the switches (13), (22) to connect the power source (12 ) to the glow plugs (16), (17), (18), (19) and time constant circuit when the voltage across the capacitor (32) is below the predetermined value. This has the effect of heating the glow plugs (16), (17), (18), (19) to a predetermined temperature and maintaining them at the predetermined temperature.

REFERENCES:
patent: 2840067 (1958-06-01), Carlson
patent: 3509322 (1970-04-01), Lundin
patent: 3813516 (1974-05-01), Kudsi et al.
patent: 3819904 (1974-06-01), Novak
patent: 3894282 (1975-07-01), MacFarland, Jr.
patent: 4130853 (1978-12-01), Baker
patent: 4137885 (1979-02-01), Van Ostrom

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