Circuit arrangement for controlling air-fuel mixture of internal combustion engine, has measuring resistor detecting limiting current, and pump voltage adjusting unit adjusting pump voltage depending on supply voltage
摘要
<p>The arrangement has an adapter (200) connected between a probe device (100) and an evaluation device (300), and a voltage divider unit (201) and voltage divider resistors (201a, 201b) providing a basic pump voltage (408) to make a basic function of the probe device. A measuring resistor (202) detects a limiting current over a measuring potential drop. A pump voltage adjusting unit (203) adjusts the pump voltage depending on a supply voltage (412). The probe device is exposed to an exhaust gas stream of an internal combustion engine for detecting oxygen content of the exhaust gas stream. An independent claim is also included for a method for controlling an air-fuel mixture of an internal combustion engine.</p>
