Internal combustion engine`s e.g. petrol engine, combustion phase-relevant variables detecting circuit for ignition transformer, has voltage dependent resistor and capacitor decoupled from ignition coil of engine by decoupling units

摘要

The circuit has an ionization measuring circuit with measuring resistors (9, 10), a voltage dependent resistor (6) and a capacitor (7). The voltage dependent resistor and the capacitor are coupled with an ignition plug (2). The voltage dependent resistor and the capacitor are decoupled from an ignition voltage generating device e.g. ignition coil (3), of an internal combustion engine by decoupling units (5, 8). Independent claims are also included for the following: (1) a method of detecting combustion-relevant variables in combustion processes in a combustion phase of an internal combustion engine (2) an ignition transformer with a circuit for detecting combustion-relevant variables of an internal combustion engine (3) a device for igniting of burns in an internal combustion engine (4) a method of igniting a fuel-air mixture during a combustion cycle in an internal combustion engine (5) an ignition coil unit with a device for igniting of burns in an internal combustion engine (6) an engine controller for igniting of burns in an internal combustion engine (7) a circuit for evaluating ionization signal characteristics of combustion in an internal combustion engine (8) a method of evaluating ionization signal characteristics of combustion in an internal combustion engine (9) a method of determining ionization signals of two cylinders of an internal combustion engine.