Johannes Grabis

Title: Innovations by Johannes Grabis

Introduction

Johannes Grabis is a notable inventor based in Renningen, Germany. He has made significant contributions to the field of sensor technology, particularly in the area of self-diagnosis for particle sensors and exhaust gas probes. With a total of 3 patents to his name, Grabis continues to push the boundaries of innovation in his field.

Latest Patents

One of his latest patents is a method and device for the self-diagnosis of a particle sensor. This invention allows for the determination of particle content in a gaseous stream. The particle sensor features at least two interlocking, interdigital electrodes and a heating element, which is separated from the electrodes by an insulation layer. During a regeneration phase, the particle sensor is heated, allowing for the removal of soot load. A semiconductive layer is formed in the insulation layer directly beneath the electrodes through external doping or auto-doping. To perform self-diagnosis, a measurement voltage is applied periodically between the electrodes, and a self-diagnostic current is measured.

Another significant patent by Grabis is a method for the self-diagnosis of an exhaust gas probe. This method involves determining a modeled heat output for the heating element using a computer program that compares parameters of the gas stream with a measured heat output. If the parameters of the gas stream exceed the measured heat output by a defined tolerance limit, it indicates that the exhaust gas probe is defective, and the exhaust gas section in which it is installed may also be faulty.

Career Highlights

Johannes Grabis is currently employed at Robert Bosch GmbH, a leading company in the automotive and technology sectors. His work at Bosch has allowed him to develop innovative solutions that enhance the performance and reliability of sensor technologies.

Collaborations

Throughout his career, Grabis has collaborated with talented individuals such as Enno Baars and Alexander Hetznecker. These collaborations have contributed to the advancement of his projects and the successful development of his patents.

Conclusion

Johannes Grabis is a prominent inventor whose work in sensor technology has led to significant advancements in self-diagnosis methods. His contributions continue to impact the industry positively, showcasing the importance of innovation in technology.