Patents by Inventor Hiromachi Kimura

Hiromachi Kimura has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Control system for a combined shift in which an accumulator is disconnected in an automatic transmission
    Patent number: 5339709
    Abstract: A control system is provided for an automatic transmission which has primary and second shifting units connected together to provide multi-stage speed ranges. Upon performing a combined shift, a hydraulic control circuit disconnects a hydraulic servomotor and its corresponding accumulator and the pressure in the servomotor is controlled by an electrical signal. When a decision for a second shift is made in the course of the combined shift, the pressure in a hydraulic servomotor for a downshift frictional engagement element is controlled by an electrical signal to return the element to its position before the combined shift while monitoring the number of revolutions of a rotating member in the transmission. As a consequence, a particular speed stage is configured and a shift signal corresponding to the decision of the second shift is outputted to the circuit.
    Type: Grant
    Filed: October 7, 1992
    Date of Patent: August 23, 1994
    Assignees: Aisin AW Co., Ltd., Toyota Jidosha Kabushiki Kaisha
    Inventors: Akira Suzuki, Kazunori Ishikawa, Kunihiro Iwatsuki, Hidehiro Oba, Hiromachi Kimura, Hideaki Otsubo