Patents by Inventor Shiro Kawakatsu

Shiro Kawakatsu 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).

  • Patent number: 4495484
    Abstract: A vehicle such as an automobile includes various auxiliary devices for implementing auxiliary functions such as electrical equipment, windows, doors, a parking brake, a transmission and the like, in addition to a principal scheme for a running operation of the vehicle. The vehicle also includes two alarms, one being provided for raising an alarm inside the vehicle and the other being provided for raising an alarm outside the vehicle. When a driver leaves the vehicle after he ends the drive, a predetermined undesired state of various auxiliary devices, such as a switch for the circuit of electrical equipment being kept turned on, the window or door being not fully closed, the parking brake being not put on and so on is detected, when the key switch is turned off. Upon detection of such undesired state, first the inside alarm is energized and after a predetermined time period the outside alarm is energized.
    Type: Grant
    Filed: January 7, 1982
    Date of Patent: January 22, 1985
    Assignee: Daihatsu Motor Co., Ltd.
    Inventors: Shiro Kawakatsu, Toshikazu Kawasaki
  • Patent number: 4407132
    Abstract: A hybrid vehicle comprises an internal combustion engine and a motor/generator, which are controlled by a microcomputer. The internal combustion engine is rendered capable of a running operation in a region of a better fuel consumption characteristic. Outside the above described region, the motor is cooperatively driven with the internal combustion engine to provide a driving torque or only the motor is energized by a battery to provide a driving torque. On the other hand, when the hybrid vehicle is driven with a torque smaller than a predetermined lower limit value of the torque of the internal combustion engine, the redundant torque is used to drive the generator, so that a regenerative power is absorbed by the battery.
    Type: Grant
    Filed: December 14, 1981
    Date of Patent: October 4, 1983
    Assignee: Daihatsu Motor Co., Ltd.
    Inventors: Shiro Kawakatsu, Shoji Honda
  • Patent number: 4353055
    Abstract: A vehicle such as an automobile comprises various auxiliary devices for implementing auxiliary functions such as electrical equipment, windows, doors, a parking brake, a transmission and the like, in addition to a principal scheme for a running operation of the vehicle. The vehicle also comprises two alarms, one being provided for raising an alarm inside the vehicle and the other being provided for raising an alarm outside the vehicle. When a driver leaves the vehicle after he ends the drive, a predetermined undesired state of various auxiliary devices, such as a switch for the circuit of electrical equipment being kept turned on, the window or door being not fully closed, the parking brake being not put on and so on is detected, when the key switch is turned off. Upon detection of such undesired state, first the inside alarm is energized and after a predetermined time period the outside alarm is energized.
    Type: Grant
    Filed: May 14, 1980
    Date of Patent: October 5, 1982
    Assignee: Daihatsu Motor Co., Ltd.
    Inventors: Shiro Kawakatsu, Toshikazu Kawasaki
  • Patent number: 4335429
    Abstract: A hybrid vehicle comprises an internal combustion engine, a relatively large motor/generator and a relatively small motor/generator, which are controlled by a microcomputer based on the required torque of the vehicle as a function of time. When the engine is permitted to run, it is always operated in that region which minimizes fuel consumption. If the torque of the engine is too low to drive the vehicle, the relatively large motor is energized to make up for the deficiency. When the engine produces excess torque, the relatively large motor/generator absorbs the excess and is operated as a generator to generate electricity. Braking torque is usually obtained by operating the relatively large motor/generator as a generator. When braking torque is insufficient, the relatively small motor/generator is also operated as a generator to make up for the deficiency.
    Type: Grant
    Filed: March 12, 1980
    Date of Patent: June 15, 1982
    Assignee: Daihatsu Motor Co., Ltd.
    Inventor: Shiro Kawakatsu
  • Patent number: 4305254
    Abstract: A hybrid vehicle comprises an internal combustion engine and a motor/generator, which are controlled by a microcomputer. The internal combustion engine is rendered capable of a running operation in a region of a better fuel consumption characteristic. Outside the above described region, the motor is cooperatively driven with the internal combustion engine to provide a driving torque or only the motor is energized by a battery to provide a driving torque. On the other hand, when the hybrid vehicle is driven with a torque smaller than a predetermined lower limit value of the torque of the internal combustion engine, the redundant torque is used to drive the generator, so that a regenerative power is absorbed by the battery.
    Type: Grant
    Filed: February 20, 1980
    Date of Patent: December 15, 1981
    Assignee: Daihatsu Motor Co., Ltd.
    Inventors: Shiro Kawakatsu, Shoji Honda