Tatsunobu Hattori

Title: Tatsunobu Hattori: Fuel-System and Engine-Control Inventor.

Introduction

Tatsunobu Hattori is an inventor based in Seto, Japan, whose patent work focuses on control systems for fuel supply and internal combustion engines. He is associated with Toyota Jidosha Kabushiki Kaisha and is credited with 3 patents.

Latest Patents

Hattori’s listed patents address monitoring and controlling shut-off valves in engine fuel systems.

“Controller for a Fuel Supply System” describes a controller for a hydrogen engine and its fuel-system shut-off valves. When a vehicle user requests that the engine stop, the controller closes a valve and monitors the downstream hydrogen pressure while the engine continues running. A slow pressure drop can indicate that the valve has not closed properly. The controller stops this failure-determination routine if the engine stalls during the process.

“Controller for Internal Combustion Engine” concerns a fuel tank, fuel passage, injection valve, shut-off valve, and pressure sensor. After sending a valve-closing signal, the controller assesses whether the valve is stuck open by measuring the decrease in fuel pressure over a specified period. It excludes periods when fuel injection is cut off during engine operation from that assessment.

Career Highlights

Hattori’s patent portfolio reflects work on engine-control logic and fuel-system diagnostics. The described inventions use pressure monitoring and operating-state information to help determine whether shut-off valves are functioning as intended.

Collaborations

Hattori is associated with Toyota Jidosha Kabushiki Kaisha. His listed coworkers include Yutaro Kitano and Ryota Iwasaki.

Conclusion

Tatsunobu Hattori’s patents focus on detecting shut-off valve faults in hydrogen and internal-combustion-engine fuel systems through pressure-based control methods.