Masanori Hirose

Title: Masanori Hirose: Innovator in Brake System Technology

Introduction

Masanori Hirose is a notable inventor based in Okazaki, Japan. He has made significant contributions to the field of automotive technology, particularly in brake systems. With a total of 7 patents to his name, Hirose's innovations have enhanced the safety and efficiency of braking mechanisms in vehicles.

Latest Patents

One of Hirose's latest patents is a displacement sensing apparatus designed as a pedal stroke sensor. This innovative device features a rotor that rotates with the brake pedal, equipped with a pair of brushes fixed on the rotor. The brushes are inclined oppositely to each other along the rotor's rotating direction and make contact with a circuit printed on a circuit board. This design generates output voltages V,A and V,B that increase and decrease in opposition as the brushes slide over the circuit board. The difference signal |V,A−V,B| is output as a signal corresponding to the pedal stroke S of the brake pedal. Notably, even when vibrations alter the contacting positions of the brushes, the difference signal remains stable, allowing for accurate detection of the brake pedal's position.

Another significant patent involves a hydraulic braking system where the pump motor control PWM frequency is lowered below the upper audibility limit under predetermined braking conditions. This system includes a hydraulic pump operated by an electric motor, with a motor control device that regulates the electric current applied to the motor through pulse width modulation. The PWM frequency is set to a high value during normal braking operations to minimize noise, while it is lowered during noise-tolerable braking operations, allowing for effective noise management.

Career Highlights

Hirose has worked with prominent companies in the automotive industry, including Toyota Motor Corporation and Aisin Seiki Co., Ltd. His experience in these organizations has contributed to his expertise in developing advanced braking technologies.

Collaborations

Throughout his career, Hirose has collaborated with talented individuals such as Shuuichi Buma and Yuji Yokoya. These partnerships have fostered innovation and the development of cutting-edge technologies in the automotive sector.

Conclusion

Masanori Hirose's contributions to brake system technology exemplify his dedication to innovation and safety in the automotive industry. His patents reflect a commitment to enhancing vehicle performance and reliability.