| 摘要 |
<p>In an ignition system with glow plugs (11) the filament thereof is supplied with power from a generator (10) via a switch device (12). The power is controlled so that the constant glow temperature level is obtained, i.e. a predetermined resistance in the filament. This one is associated with a measure bridge (13) 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 plug. The balance of the bridge, saying that the glow plug is too hot or too cold, is registered for the present cycle by a comparator (18) in which the balance is converted into a logical signal to be a basis for the on/off regulation by the switch device in the heating circuit of the plug.</p> |
