Keizo Yanagisawa

Title: Keizo Yanagisawa: Innovator in Vehicle Automatic Transmission Technology

Introduction

Keizo Yanagisawa is a notable inventor recognized for his contributions to vehicle automatic transmission technology. Based in Fuji, Japan, he has developed innovative solutions that enhance the performance and efficiency of automatic transmissions. With a total of two patents to his name, Yanagisawa's work has significantly impacted the automotive industry.

Latest Patents

Yanagisawa's latest patents focus on the control of vehicle automatic transmissions. One of his inventions includes an automatic transmission that features a torque converter and a multiple-stage transmission gear mechanism. This design incorporates a hydraulically actuated brake and a clutch that alternately engage to select one of two adjacent gear stages. To minimize gear shift shock, the engagement of the clutch or brake is controlled to be faster during the initial phase of a gear shifting operation compared to the remainder of the operation. Additionally, a control circuit monitors the gear shifting process and adjusts the predetermined time period based on the results of the latest operation, storing the modified value for future use.

Another patent by Yanagisawa describes a vehicle automatic transmission that also utilizes a torque converter and a multiple-stage transmission gear mechanism. This invention allows for the selection of gear stages based on the vehicle's operating conditions. It includes friction members that engage and disengage depending on the gear stage, ensuring a smooth transition when shifting down from a higher to a lower gear stage