Heating current control for glow plug of internal combustion...

Details Heating current control for glow plug of internal combustion... Heating current control for glow plug of internal combustion...

F - Mech Eng,Light,Heat,Weapons

02

P

327/119

F02P 19/02 (2006.01)

Patent

CA 1202692

ABSTRACT OF THE DISCLOSURE In an ignition system having a glow plug, the filament thereof is supplied with power from a generator by means of a switch. The power is controlled so that a constant glow temperature level is obtained, for example by means of predetermined resistance in the filament. The arrangement is associated with a Wheatsone bridge which, during a short interval at the beginning of every heat current cycle, is switched on when generator power is not yet supplied to the glow plug. The balance of the Wheatstone bridge, which indicates whether the glow plug is too hot or too cold, is registered for the present cycle by means of a comparator in which the balance is converted into a logical signal to be the basis of on/off regulation by the switch in the heating circuit of the glow plug.

413230

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