Patents by Inventor Yasutaka Taniguchi

Yasutaka Taniguchi 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: 5480221
    Abstract: A control method and an apparatus therefor, in which the braking force distribution to rear wheels is increased in a normal state, while the braking force distribution to the rear wheels is reduced to prevent the rear wheels from being locked in an early stage when the road surface is slippery. There are provided a pressure sensor (74) for detecting a master cylinder pressure, proportioning valves (57.sub.1, 57.sub.2) arranged in passages which connect a master cylinder and rear wheel cylinders and adapted to operate so that the ratios of the wheel cylinder pressures to the master cylinder pressure are low in a region where the master cylinder pressure is not lower than a predetermined pressure, normally-open switching valves (62, 63) by-passing the two valves, and a controller (71).
    Type: Grant
    Filed: December 30, 1994
    Date of Patent: January 2, 1996
    Assignee: Mitsubishi Jidosha Kogyo Kabushiki Kaisha
    Inventors: Takao Morita, Tsutomu Matsukawa, Hiromichi Yasunaga, Tadao Tanaka, Akihiko Togashi, Yasutaka Taniguchi, Masanori Tani
  • Patent number: 5393087
    Abstract: A pneumatic active suspension apparatus is provided wherein, when a sprung vertical acceleration (ZG), which causes a wafting phenomenon perceptible by a person in a vehicle, occurs during travel of the vehicle, supply/discharge of air to/from air spring chambers of suspension units is carried out for a supply/discharge control time determined based on the maximum value (ZGmax) of the sprung vertical acceleration. The supply/discharge control is started at an advanced time based on the sprung acceleration whose phase is advanced by 90 degrees from that of the sprung velocity, to thereby produce a force acting to cancel out the sprung vertical velocity at proper timing. As a result, the operation delay of the suspension apparatus is compensated for and the sprung vertical motion is suppressed.
    Type: Grant
    Filed: September 17, 1993
    Date of Patent: February 28, 1995
    Assignee: Mitsubishi Jidosha Kogyo Kabushiki Kaisha
    Inventors: Yasutaka Taniguchi, Takao Morita, Tadao Tanaka, Kenji Hayase, Masanori Tani
  • Patent number: 5332296
    Abstract: A rear wheel braking force control apparatus of a vehicle includes a pressure sensor 74 for detecting master cylinder pressure, right and left proportioning valves 57.sub.1 and 57.sub.2 individually disposed in passages for transmitting master cylinder pressure to right and left wheel cylinders of the rear wheels for controlling to decrease changes in wheel cylinder pressure relative to changes in master cylinder pressure, right and left PCV bypass valves 62 and 63 for individually bypassing the proportioning valves, and a controller 71 which, when the vehicle is determined by a steering angle sensor 77 or the like to be turning, closes the PCV bypass valve at the outer wheel side when the master cylinder pressure is higher than the pressure of the PCV bypass valve at the inner wheel side.
    Type: Grant
    Filed: November 30, 1992
    Date of Patent: July 26, 1994
    Assignee: Mitsubishi Jidosha Kogyo Kabushiki Kaisha
    Inventors: Takao Morita, Tsutomu Matsukawa, Hiromichi Yasunaga, Tadao Tanaka, Akihiko Togashi, Yasutaka Taniguchi, Masanori Tani
  • Patent number: 5302007
    Abstract: When a master cylinder pressure detected by way of a pressure sensor (74) attains a level not lower than a target pressure (P.sub.OK), normally-open on-off valves (62, 63) for by-passing proportioning control valves (57.sub.1, 57.sub.2) are opened. If the slip factor of rear wheels, calculated by way of a slip factor calculation section (121), is not lower than a predetermined value, the on-off valves (64, 66) are opened to allow the rear wheel cylinder pressure to escape to accumulators (65, 67). Thus, if there is enough room for the increase of the braking force on the rear wheels, the rear wheel braking force can be increased to reduce the share of the front wheel braking force, depending on braking conditions, such as the road surface conditions, vehicle running conditions, etc. Further the rear wheels can be prevented from being locked.
    Type: Grant
    Filed: November 30, 1992
    Date of Patent: April 12, 1994
    Assignee: Mitsubishi Jidosha Kogue Kabushiki Kaisha
    Inventors: Takao Morita, Tsutomu Matsukawa, Hiromichi Yasunaga, Tadao Tanaka, Akihiko Togashi, Yasutaka Taniguchi, Masanori Tani
  • Patent number: 4977506
    Abstract: A suspension control apparatus for an automotive vehicle has a plurality of suspension units which are disposed between each of the wheels of the vehicle and the vehicle body. A plurality of actuators for controlling the characteristics of the suspension units are controlled by a control unit in response to the output of an acceleration sensor. The ground circuit of the acceleration sensor is connected to the ground circuit of the control unit.
    Type: Grant
    Filed: October 17, 1988
    Date of Patent: December 11, 1990
    Assignees: Mitsubishi Jidosha Kogyo Kabushiki Kaisha, Mitsubishi Denki Kabushiki Kaisha
    Inventors: Mitsuhiko Hara, Shozo Takizawa, Tadao Tanaka, Yasutaka Taniguchi, Shunichi Wada, Shigeki Ohtagaki
  • Patent number: 4856815
    Abstract: When vibrations having a period at which pitching tends to occur in a vehicle body is detected, if its amplitude falls out of the range between "H" and "L", a control unit increases the damping force of each suspension unit by using an actuator. In addition, if the amplitude falls out of the range between "HH" and "LL", the control unit supplies a predetermined amount of air to each air spring chamber in response to an upward displacement of vehicle height, and exhausts a predetermined amount of air from each air spring chamber in response to a downward displacement of vehicle height.
    Type: Grant
    Filed: October 11, 1988
    Date of Patent: August 15, 1989
    Assignees: Mitsubishi Jidoshia Kogyo Kabushiki Kaisha, Mitsubhishi Denki Kabushiki Kaisha
    Inventors: Tadao Tanaka, Mitsuhiko Harara, Yasutaka Taniguchi, Shozo Takizawa, Minoru Tatemoto, Tetsuya Terada, Shunichi Wada, Shigeki Ohtagaki, Kouji Mitsuhata
  • Patent number: 4856813
    Abstract: If a deceleration exeeds first set value G1 within set time T1 after the brake is depressed, a set amount of fluid is supplied to the fluid spring chamber of each front-wheel suspension unit. If a deceleration exceeds the second set value G2 when set time T1 or more has elapsed upon this operation, a set amount of fluid is exhausted from the fluid spring chamber of each rearwheel suspension unit. With this operation, since braking action for gradually increasing a deceleration is controlled by two stages, uncomfortableness which passangers feel in anti-nose-dive control can be greatly reduced. In addition, control is not performed only by depressing the brake pedal if an acutal deceleration is smaller than first set value G1.
    Type: Grant
    Filed: October 11, 1988
    Date of Patent: August 15, 1989
    Assignees: Mitsubishi Jidosha Kogyo Kabushiki Kaisha, Mitsubishi Denki Kabushiki Kaisha
    Inventors: Tadao Tanaka, Mitsuhiko Harara, Yasutaka Taniguchi, Shozo Takizawa, Minoru Tatemoto, Tetsuya Terada, Shunichi Wada, Shigeki Ohtagaki, Kouji Mitsuhata
  • Patent number: 4852905
    Abstract: A vehicle suspension apparatus having a fluid spring chamber provided for each wheel and inserted between the wheel and a vehicle body, a fluid supply unit for supplying a fluid to each fluid spring chamber through a supply valve, a fluid exhaust unit for exhausting the fluid from each fluid spring chamber through an exhaust valve, a roll amount sensor for detecting a roll amount of the vehicle body, and a roll controller for setting a control target corresponding to the roll amount detected by the roll amount sensor and executing roll control in which the supply valves corresponding to the fluid spring chambers at a contracting side with respect to a direction of roll generated in the vehicle body and the exhaust valves corresponding to the fluid spring chambers at an expanding side are opened in accordance with the control target, includes a pressure sensor for detecting an internal pressures in the fluid spring chamber at one of front and rear sides, and an internal pressure relationship memory for storing
    Type: Grant
    Filed: August 30, 1988
    Date of Patent: August 1, 1989
    Assignee: Mitsubishi Jidosha Kogyo Kabushiki Kaisha
    Inventors: Tadao Tanaka, Mitsuhiko Harara, Yasutaka Taniguchi, Shozo Takizawa, Minoru Tatemoto
  • Patent number: 4852903
    Abstract: A vehicle suspension apparatus comprises a G sensor for detecting lateral acceleration G acting on the vehicle, and a G sensor map for setting the time for supplying/exhausting fluid to and from a fluid spring chamber mounted in each suspension unit in accordance with the lateral acceleration G detected by the G sensor, said lateral acceleration G being higher than a predetermined value. Whether the vehicle is running on a rough road is judged by a rough-road judging routine. When it is judged by the rough-road judging routine that the vehicle is running on a rough road, the non-sensitive area of the G sensor map is widened such that the lateral acceleration G detected by the G sensor is non-sensitive to the G sensor map while the vehicle is running on the rough road, even if the detected lateral acceleration G is somewhat high, thereby preventing the erroneous roll control function.
    Type: Grant
    Filed: September 29, 1988
    Date of Patent: August 1, 1989
    Assignee: Mitsubishi Jidosha Kogyo Kabushiki Kaisha
    Inventors: Tadao Tanaka, Mitsuhiko Harara, Yasutaka Taniguchi, Shozo Takizawa, Minoru Tatemoto
  • Patent number: 4830394
    Abstract: A vehicle suspension apparatus having a fluid spring chamber provided for each wheel and inserted between the wheel and a vehicle body, a fluid supply unit for supplying a fluid to each fluid spring chamber through a supply valve, a fluid exhaust unit for exhausting the fluid from each fluid spring chamber through an exhaust valve, a roll amount detector for detecting a roll amount of the vehicle body, and a roll controller for setting a control target corresponding to the roll amount detected by the roll amount detector and executing roll control in which the supply valves corresponding to the fluid spring chambers at a contracting side with respect to a direction of roll generated in the vehicle body and the exhaust valves corresponding to the fluid spring chambers at an expanding side are opened in accordance with the control target, includes a plurality of memories, provided in the roll controller, each for storing a control target corresponding to the roll amount of the vehicle body, the control targets
    Type: Grant
    Filed: August 30, 1988
    Date of Patent: May 16, 1989
    Assignee: Mitsubishi Jidosha Kogyo Kabushiki Kaisha
    Inventors: Tadaoa Tanaka, Mitsuhiko Harara, Yasutaka Taniguchi, Shozo Takizawa, Minoru Tatemoto
  • Patent number: 4697237
    Abstract: A microcomputer performs roll control and communication control. In roll control, when the steering state detecting means and vehicle velocity detecting means detect a factor which causes a roll state of the vehicle body, a second control signal is produced to open desired supply and exhaust control valve so as to supply a preset amount of fluid to the fluid spring chambers of contracted suspension units and to exhaust a preset amount of fluid from the fluid spring chambers of stretched suspension units. In communication control, a first control signal is supplied to the communicating means to open the communication control valve when the steering state sensor detects that the steering angle falls within a preset steering angle and to close the communication control valve otherwise.
    Type: Grant
    Filed: November 14, 1985
    Date of Patent: September 29, 1987
    Assignee: Mitsubishi Jidosha Kogyo Kabushiki Kaisha
    Inventors: Tadao Tanaka, Mitsuhiko Harara, Yasutaka Taniguchi, Masanaga Suzumura, Minoru Tatemoto, Naotake Kumagai
  • Patent number: 4695074
    Abstract: In a vehicle suspension apparatus having air spring chambers between the vehicle body and the respective wheels to perform height and position control modes by controlling supply control valve means for supplying air to the air spring chambers and exhaust control valve means for exhausting air from the air spring chambers, the vehicle suspension apparatus has a high-pressure reserve tank connected to the respective chambers through the supply control valves, a first compressor for supplying compressed air to the high-pressure reserve tank, a low-pressure reserve tank connected to the respective chambers through the corresponding exhaust control valves and the suction port of the first compressor, and a second compressor for supplying atmospheric air to the high-pressure reserve tank through a check valve and a drier arranged between the check valve and the second compressor.
    Type: Grant
    Filed: June 21, 1985
    Date of Patent: September 22, 1987
    Assignee: Mitsubishi Jidosha Kogyo Kabushiki Kaisha
    Inventors: Kazuyoshi Kobayashi, Shozo Takizawa, Tadao Tanaka, Mitsuhiko Harara, Yasutaka Taniguchi, Masanaga Suzumura, Minoru Tatemoto, Naotake Kumagai
  • Patent number: 4673193
    Abstract: In a vehicle suspension apparatus, front and rear wheel suspension units respectively have air spring chambers. Air is supplied to predetermined air spring chambers from an air source through a supply control valve, and at the same time air is exhausted from remaining air spring chambers through an exhaust control valve. Three-directional valves are inserted between the respective air spring chambers and the exhaust control valve. One end of a front wheel communication path is connected to the front left wheel three-directional valve and the other end of the path is connected to the front right wheel three-directional valve. Similarly, one end of a rear wheel communication path is connected to the rear left wheel three-directional valve and the other end of the path is connected to the rear right wheel three-directional valve.
    Type: Grant
    Filed: May 17, 1985
    Date of Patent: June 16, 1987
    Assignee: Mitsubishi Jidosha Kogyo Kabushiki Kaisha
    Inventors: Kazuyoshi Kobayashi, Shozo Takizawa, Tadao Tanaka, Mitsuhiko Harara, Yasutaka Taniguchi, Masanaga Suzumura, Naotake Kumagai, Minoru Tatemoto
  • Patent number: 4669749
    Abstract: In a vehicle suspension apparatus comprising communication control means for producing a disabling control signal for disabling the communicating solenoid valves when conditions are satisfied that the velocity detected by the velocity sensor exceeds a preset velocity and the steering angle detected by the steering sensor exceeds a preset steering angle and for producing an enabling control signal when the conditions are not satisfied, and roll control means for producing a control command signal for opening desired ones of the supply and exhaust control valves for a preset control time in order to supply a preset amount of fluid to contracted fluid spring chambers along a roll direction and for exhausting a preset amount of fluid from stretched fluid spring chambers when the conditions are satisfied, the preset velocity as one of the conditions determined by the communication control means is set to have a first value when the communicating solenoid valves are enabled and to have a second value larger than th
    Type: Grant
    Filed: November 19, 1985
    Date of Patent: June 2, 1987
    Assignee: Mitsubishi Jidosha Kogyo Kabushiki Kaisha
    Inventors: Tadao Tanaka, Mitsuhiko Harara, Yasutaka Taniguchi, Masanaga Suzumura, Minoru Tatemoto, Naotake Kumagai
  • Patent number: 4640526
    Abstract: A vehicle suspension apparatus including suspension units each provided for each wheel and having an air spring chamber is disclosed, in which rolling control and vehicle height control are done through control of air to and from the air spring chambers. The driving of a reservoir tank for storing compressed air to be supplied to the air spring chambers, is inhibited until the engine operation has been stabilized after the start of the engine preset level. In this way, the problems in the engine lubrication and idling are solved, and the defficiencies of the starting property of the engine are overcome.
    Type: Grant
    Filed: April 25, 1985
    Date of Patent: February 3, 1987
    Assignee: Mitsubishi Jidosha Kogyo Kabushiki Kaisha
    Inventors: Tadao Tanaka, Sunao Chikamori, Mitsuhiko Harara, Yasutaka Taniguchi, Masanaga Suzumura, Minoru Tatemoto, Naotake Kumagai, Hiroki Abe, Shozo Takizawa
  • Patent number: 4639014
    Abstract: The characteristic of the suspension is held to be a soft one when the vehicle is running along a flat surface, while it is automatically switched by the switch unit to a hard one when the cycle period T of vertical vibration of the vehicle height becomes near the cycle of the natural vibration of sprung mass of the suspension at the time of running along a road having an irregular surface or jumping a projection, thereby suppressing the resonance of the vehicle body due to external force applied from the road to improve the comfortability.
    Type: Grant
    Filed: April 25, 1985
    Date of Patent: January 27, 1987
    Assignee: Mitsubishi Jidosha Kogyo Kabushiki Kaisha
    Inventors: Tadao Tanaka, Sunao Chikamori, Mitsuhiko Harara, Yasutaka Taniguchi, Masanaga Suzumura, Minoru Tatemoto, Naotake Kumagai, Hiroki Abe, Shozo Takizawa
  • Patent number: 4625992
    Abstract: A suspension apparatus has suspension units which have individual fluid spring chambers and are arranged on the wheels. When a detected negative acceleration (deceleration) exceeds a reference negative deceleration, front wheel fluid supply valves are opened for a control time T to supply a predetermined amount of fluid to the front wheel spring chambers and rear wheel fluid extent valves are opened for the control time T to exhaust a predetermined amount of fluid from the rear wheel fluid spring chambers, thereby decreasing nose dive at the time of deceleration.
    Type: Grant
    Filed: January 24, 1985
    Date of Patent: December 2, 1986
    Assignee: Mitsubishi Jidosha Kogyo Kabushiki Kaisha
    Inventors: Tadao Tanaka, Sunao Chikamori, Mitsuhiko Harara, Shinichi Takeuchi, Yasutaka Taniguchi, Masanaga Suzumura, Minoru Tatemoto, Naotake Kumagai, Hiroki Abe
  • Patent number: 4613154
    Abstract: Air spring chambers are provided in suspension units of respective wheels, and air intake solenoid valves and exhaust solenoid valves are provided corresponding to the air spring chambers. Further, switching means for switching the suspension units between the hard and soft states is provided, and when the vehicle's velocity, detected by the vehicle velocity sensors, is less than the set velocity, the suspension units are set to the soft state, and when the vehicle's velocity is the set velocity or higher, the suspension units are set to the hard state to control the switching means in a vehicle suspension apparatus.
    Type: Grant
    Filed: August 2, 1985
    Date of Patent: September 23, 1986
    Assignee: Mitsubishi Jidosha Kogyo Kabushiki Kaisha
    Inventors: Tadao Tanaka, Mitsuhiko Harara, Yasutaka Taniguchi, Masanaga Suzumura, Minoru Tatemoto, Naotake Kumagai
  • Patent number: 4605244
    Abstract: A vehicle suspension apparatus including suspension units each provided for each wheel and having an air spring chamber is disclosed. When steering wheel is quickly returned toward the center position at the time of a slalom running, it is detected from the steering angular velocity and vehicle velocity that the vehicle body has begun to be returned to a neutral state, and communication control valves are opened before the reaching of the center position, i.e., before the steering angle reaches an insensitive range. Rolling control thus can be improved without delay in the restoration of the position of the vehicle body even at the time of a high speed slalom running, at which time the steering wheel is repeatedly operated quickly.
    Type: Grant
    Filed: April 25, 1985
    Date of Patent: August 12, 1986
    Assignee: Mitsubishi Jidosha Kogyo Kabushiki Kaisha
    Inventors: Tadao Tanaka, Sunao Chikamori, Mitsuhiko Harara, Yasutaka Taniguchi, Masanaga Suzumura, Minoru Tatemoto, Naotake Kumagai, Hiroki Abe, Shozo Takizawa
  • Patent number: 4602805
    Abstract: The front wheel exhaust valves and the rear wheel supply valves are opened for a predetermined period of time when rapid acceleration of the vehicle is detected by the accelerator pedal sensor and the gear position sensor, the absolute value of change in vehicle position and its velocity can be properly controlled. Therefore, comfort and steering stability can be improved as compared with vehicles mounting of the conventional apparatus. In addition, since an acceleration state is detected by the gear position sensor as well as the accelerator pedal sensor, rapid acceleration of the vehicle can be accurately detected, thereby preventing unnecessary position control.
    Type: Grant
    Filed: April 25, 1985
    Date of Patent: July 29, 1986
    Assignee: Mitsubishi Jidosha Kogyo Kabushiki Kaisha
    Inventors: Tadao Tanaka, Sunao Chikamori, Mitsuhiko Harara, Yasutaka Taniguchi, Masanaga Suzumura, Minoru Tatemoto, Naotake Kumagai, Hiroki Abe