Patents by Inventor Motomu Hakiai

Motomu Hakiai 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).

  • Vehicle brake device and method of controlling the same
    Patent number: 9376097
    Abstract: An object of the invention is to prevent abnormal noise from being generated when the pressure of brake fluid supplied to a brake caliper is reduced. A vehicle brake device includes first and second hydraulic brakes generating a hydraulic brake force and a regenerative brake generating a regenerative brake force and divides a braking force into the hydraulic brake force and the regenerative brake force. The vehicle brake device includes a regulating valve that is provided between the first and second hydraulic brakes and continuously regulates the flow rate of brake fluid flowing to the second hydraulic brake from the first hydraulic brake, and a pressure reducing valve that reduces the pressure of the brake fluid supplied to the second hydraulic brake. An opening of the regulating valve is continuously increased and the pressure reducing valve is opened, when the hydraulic brake force of the first hydraulic brake is reduced.
    Type: Grant
    Filed: October 5, 2011
    Date of Patent: June 28, 2016
    Assignee: Bosch Corporation
    Inventors: Motomu Hakiai, Yoshiyasu Takasaki
  • Brake device for vehicle and control method thereof
    Patent number: 9352655
    Abstract: A brake device for a vehicle, that includes at least a first hydraulic brake and a second hydraulic brake which produce hydraulic brake forces, and a regenerative brake which produces a regenerative brake force, and that performs a distribution of the hydraulic brake force and the regenerative brake force with respect to a driver request brake force.
    Type: Grant
    Filed: January 29, 2013
    Date of Patent: May 31, 2016
    Assignee: Bosch Corporation
    Inventors: Yasutaka Nagakura, Motomu Hakiai
  • Vehicle brake device and method of controlling vehicle brake device
    Patent number: 9061672
    Abstract: There is provided a vehicle brake device that includes hydraulic brake means for generating a hydraulic brake force and regenerative brake means for generating a regenerative brake force and distributes the hydraulic brake force and the regenerative brake force for a driver-requested brake force. The hydraulic brake means includes a pressure reducing valve that reduces hydraulic pressure of wheel cylinders. The vehicle brake device includes hydraulic brake control means for maintaining the pressure reducing valve open while the driver-requested brake force is covered by only the regenerative brake force. The hydraulic brake control means does not open the pressure reducing valve when hydraulic pressure is present in the wheel cylinders.
    Type: Grant
    Filed: August 12, 2011
    Date of Patent: June 23, 2015
    Assignee: Bosch Corporation
    Inventors: Motomu Hakiai, Yoshiyasu Takasaki
  • BRAKE DEVICE FOR VEHICLE AND CONTROL METHOD THEREOF
    Publication number: 20150048670
    Abstract: A brake device for a vehicle, that includes at least a first hydraulic brake and a second hydraulic brake which produce hydraulic brake forces, and a regenerative brake which produces a regenerative brake force, and that performs a distribution of the hydraulic brake force and the regenerative brake force with respect to a driver request brake force.
    Type: Application
    Filed: January 29, 2013
    Publication date: February 19, 2015
    Applicant: Bosch Corporation
    Inventors: Yasutaka Nagakura, Motomu Hakiai
  • VEHICLE BRAKE DEVICE AND METHOD OF CONTROLLING VEHICLE BRAKE DEVICE
    Publication number: 20130134767
    Abstract: There is provided a vehicle brake device that includes hydraulic brake means for generating a hydraulic brake force and regenerative brake means for generating a regenerative brake force and distributes the hydraulic brake force and the regenerative brake force for a driver-requested brake force. The hydraulic brake means includes a pressure reducing valve that reduces hydraulic pressure of wheel cylinders. The vehicle brake device includes hydraulic brake control means for maintaining the pressure reducing valve open while the driver-requested brake force is covered by only the regenerative brake force. The hydraulic brake control means does not open the pressure reducing valve when hydraulic pressure is present in the wheel cylinders.
    Type: Application
    Filed: August 12, 2011
    Publication date: May 30, 2013
    Applicant: BOSCH CORPORATION
    Inventors: Motomu Hakiai, Yoshiyasu Takasaki
  • VEHICLE BRAKE DEVICE AND METHOD OF CONTROLLING THE SAME
    Publication number: 20130127236
    Abstract: An object of the invention is to prevent abnormal noise from being generated when the pressure of brake fluid supplied to a brake caliper is reduced. A vehicle brake device includes first and second hydraulic brakes generating a. hydraulic brake force and a regenerative brake generating a regenerative brake force and divides a braking force into the hydraulic brake force and the regenerative brake force. The vehicle brake device includes a regulating valve that is provided between the first and second hydraulic brakes and continuously regulates the flow rate of brake fluid flowing to the second hydraulic brake from the first hydraulic brake, and a pressure reducing valve that reduces the pressure of the brake fluid supplied to the second hydraulic brake, An opening of the regulating valve is continuously increased and the pressure reducing valve is opened, when the hydraulic brake force of the first hydraulic brake is reduced.
    Type: Application
    Filed: October 5, 2011
    Publication date: May 23, 2013
    Applicant: BOSCH CORPORATION
    Inventors: Motomu Hakiai, Yoshiyasu Takasaki