| 摘要 |
PCT No. PCT/SE81/00393 Sec. 371 Date Sep. 24, 1982 Sec. 102(e) Date Sep. 24, 1982 PCT Filed Dec. 29, 1981 PCT Pub. No. WO82/02744 PCT Pub. Date Aug. 19, 1982.In an ignition system having at least one glow plug, the filament thereof is supplied with power from a generator by means of a switch device. The power is controlled whereby a constant glow temperature level is obtained, for example by means of a predetermined resistance in the filament. The arrangement is associated with a Wheatstone 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 for an on/off regulation by the switch device in the heating circuit of the glow plug. |
