Patent ID: 6792926
Filing Date: 2004-09-21
Classification: F02P

Abstract:
An ignition system for an internal combustion engine comprising:an output for electrical activation of an ignition element for a combustion chamber in an internal combustion engine, an electrical energy accumulator connected to the output for accumulating the electrical energy required for activating the ignition element, a controllable control element connected to the energy accumulator which is used to charge the energy accumulator during a predefined charge time, a measuring unit for detecting the charge state of the energy accumulator, wherein to set the charge time for the energy accumulator, a timer is provided, said timer being connected to the control element on the output side, wherein the measuring unit is connected to said timer in a feedback loop whereby the timer adjusts the charge time according to the measured charge state of the energy accumulator, and wherein the measuring unit and the control element, on the one hand, and the timer, on the other hand, are interconnected via a bidirectional control line, and wherein the energy accumulator is connected to a voltage measurement unit that monitors the ignition voltage wherein the voltage measurement unit is connected to the control line on the output side via a controllable current source or a controllable current sink to superimpose a current signal on the control line according to the measured voltage.