Chikao Kunimasa

Title: Chikao Kunimasa and Fuel-System Diagnostics.

Introduction

Chikao Kunimasa is an inventor associated with Toyota Jidosha Kabushiki Kaisha in Okazaki, Japan. His listed portfolio includes 2 patents, with the supplied patent descriptions focused on detecting malfunctions in evaporated-fuel purge systems.

Latest Patents

The two listed patent titles are “Apparatus for Detecting Malfunction in Fuel Evaporative Purge System” and “Apparatus for Detecting Malfunction in Evaporated Fuel Purge System.” The descriptions provided for these patents are substantially the same.

The apparatus monitors the concentration of fuel vapor purged from a canister into an engine’s intake passage. It compares the detected concentration after a purge interruption with the concentration observed when purging resumes, then uses the change to assess whether the purge system is malfunctioning. The design also detects the condition of fuel vapor in the tank and adjusts the duration of the purge interruption in response.

Career Highlights

Kunimasa’s listed patent work addresses vehicle emissions-system diagnostics. By combining fuel-concentration measurements with information about tank vapor conditions, the described apparatus adapts its diagnostic process to the system’s operating state.

Collaborations

The supplied information identifies Kouichi Osawa and Takayuki Otsuka as Kunimasa’s coworkers. It does not specify their roles in the listed patents.

Conclusion

Chikao Kunimasa’s listed inventions focus on diagnosing evaporated-fuel purge systems through concentration monitoring and adaptive purge timing, in connection with his work at Toyota Jidosha Kabushiki Kaisha.