Kazumichi Tutumi

Title: Kazumichi Tutumi: Engine Air-Measurement Inventions

Introduction

Kazumichi Tutumi is an inventor associated with Hyogo, Japan. His patent work includes technologies for measuring engine intake air and detecting signals from Kármán vortices. The supplied information lists 3 patents.

Latest Patents

Two of Tutumi’s latest patents concern measuring the amount of air entering an engine.

“**Suction Air Measuring Device**” describes a system that detects a Kármán vortex signal in an engine’s intake conduit, stores sampled digital signals, and converts the sensor output into pulses. Its signal-processing approach sets or resets the pulse according to changes in the sensor output, helping produce a usable representation of the vortex signal.

“**Device for Measuring Amount of Engine Suction Air**” uses a Kármán vortex sensor and two signal-binarizing paths to identify pulses. A noise detector compares the pulse counts from those paths and can switch the low-pass filter’s time constant to reduce high-frequency noise, particularly when the engine throttle opening is small.

Career Highlights

The supplied career information associates Tutumi with Mitsubishi Denki Kabushiki Kaisha and Toyo Kogyo Co., Ltd. His listed inventions focus on engine intake-air measurement and signal processing.

Collaborations

Tadakazu Ueda is identified as Tutumi’s coworker.

Conclusion

Kazumichi Tutumi’s listed patent work addresses reliable measurement of engine suction air through Kármán vortex sensing, pulse processing, and noise reduction.