Alfred Kizler

Title: Alfred Kizler and Patents in Combustion-Engine Measurement

Introduction

Alfred Kizler is an inventor associated with Stuttgart, Germany, and Robert Bosch. His work includes inventions for detecting pressure fluctuations in internal combustion engines. He is credited with 4 patents.

Latest Patents

Kizler’s listed patents address ion-current measurement and combustion-chamber pressure detection.

“Voltage source for ion current measurement in an internal combustion engine” describes deriving a measurement voltage from the ignition voltage. A capacitor can be charged to provide a positive or negative voltage across a measuring resistor, enabling ion-current measurements after the spark has ended. The design uses few additional components and can provide a continuously available voltage to support measurement timing across engine cylinders.

“Apparatus for detecting pressure fluctuations in the combustion chamber” describes an ion-current sensor with two electrodes and a connecting channel between the combustion chamber and a dead space. Pressure fluctuations, including those associated with engine knocking, cause changes in the ion current as gas moves through the channel. Adapting the dead-space geometry to the frequency of the fluctuations can help distinguish them from slower pressure variations.

Career Highlights

Kizler’s patent work reflects an engineering focus on using ion-current signals to detect combustion behavior. The described inventions connect ignition-system components with measurement techniques intended to identify pressure changes inside engine cylinders.

Collaborations

Kizler’s company is Robert Bosch. His listed coworkers include Gunter Schirmer and Klaus Dobler.

Conclusion

Alfred Kizler’s patents describe practical approaches to measuring ion currents and detecting combustion-chamber pressure fluctuations, including signals associated with engine knocking.