Patents by Inventor Mitsuaki Ishii
Mitsuaki Ishii 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).
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Patent number: 5012421Abstract: A control apparatus for a motor vehicle which can be quickly unit tested during manufacture. Normally, the control apparatus processes signals from various operating condition sensors and applies them to determine the values of control signals to respective controlled elements, wherein there is a delay between the starting of the engine and the use of one of the sensors, namely, the exhaust gas O.sub.2 sensor in determining the value of the respective control signal. To test the apparatus, signals simulating the outputs of at least one of the sensors are set to states which are improbable in acutal operation. Upon detecting such a condition, the control apparatus removes the delay from the starting of the engine and immediately applies all output signals from the sensors to determine their respective control signals.Type: GrantFiled: April 27, 1989Date of Patent: April 30, 1991Assignee: Mitsubishi Denki K. K.Inventor: Mitsuaki Ishii
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Patent number: 5012414Abstract: A vehicle control apparatus includes a condition detection device for detecting output information of at least one of the sensors having a predetermined condition which is improbable in practical use, a read only memory having data stored therein which identifies control specifications of the apparatus, and a data read out device for reading out the identifying data as a control signal for an object to be controlled.Type: GrantFiled: November 13, 1989Date of Patent: April 30, 1991Assignee: Mitsubishi Denki K.K.Inventors: Mitsuaki Ishii, Masaaki Miyazaki
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Patent number: 4996644Abstract: An air-fuel ratio control system for use in an internal combustion engine is disclosed which comprises a supply unit equipped with a carburetor incorporating an acceleration pump for supplying fuel to the internal combustion engine and at least one duty-controlled solenoid valve adapted to controlling the air-fuel ratio; an operating condition detector for detecting the operating condition of the internal combustion engine; an acceleration controlled-variable decision unit for setting a predetermined acceleration controlled-variable being given to the solenoid valve during different acceleration control times corresponding to the operating condition or different acceleration; and a control variable decision unit for determining the controlled duty of the solenoid valve according to the data from the operating condition detecting unit and when the controlled variable is given by the acceleration controlled-variable decision unit at the time of acceleration, according to the acceleration control variable.Type: GrantFiled: August 14, 1989Date of Patent: February 26, 1991Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Hiroshi Fukuchi, Mitsuaki Ishii, Masaaki Miyazaki
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Patent number: 4984552Abstract: A fuel injection device for an automotive internal combustion engine is disclosed, which comprises two distinct acceleration state determining means, i.e., a rapid and a slow acceleration state judgement means, for determining the amount of the asynchronous augmentation of fuel. The rapid acceleration state judgement detects the rapid acceleration state by comparing with a first threshold level the increment of the throttle opening degree over each period of an A/D conversion timing signal; the slow acceleration judgement means, on the other hand, detects the slow acceleration state by comparing with a second threshold level the increment of, for example, the throttle opening degree signal over, for example, two successive periods of the same A/D conversion time signal. When the rapid acceleration state is detected, an asynchronous augmentation of fuel for the rapid acceleration is effected.Type: GrantFiled: July 5, 1989Date of Patent: January 15, 1991Assignees: Mitsubishi Denki Kabushiki Kaisha, Mitsubishi Denki Ka bushiki KaishaInventors: Hiroyuki Nishizawa, Kimito Kashiwabara, Osamu Nako, Mitsuaki Ishii, Kouichi Yamane, Masaaki Miyazaki, Ryoji Nishiyama
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Patent number: 4962742Abstract: A fuel injection device for an automotive spark ignition internal combustion engine provided with a supercharger is disclosed, wherein the amount of fuel injected in synchrony with the crank angle signal is determined on the basis of the intake air pressure. The increment of the air pressure data over each fuel injection period is compared with a first threshold level to determine the first augmentation. The pressure data is averaged over each fuel injection period, and the increment of the averaged pressure data over a predetermined interval of time is compared with a second threshold level to determine the second augmentation. The fundamental amount is calculated on the basis of either the instantaneous or the averaged pressure data, in dependency on the value of the first augmentation amount.Type: GrantFiled: July 7, 1989Date of Patent: October 16, 1990Assignees: Mitsubishi Jidosha Kogyo Kabushiki Kaisha, Mitsubishi Denki Kabushiki KaishaInventors: Hiroyuki Nishizawa, Kimito Kashiwabara, Osamu Nako, Mitsuaki Ishii, Kouichi Yamane, Masaaki Miyazaki, Ryoji Nishiyama
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Patent number: 4951634Abstract: A fuel injector for a spark ignition internal combustion engine is disclosed, wherein the amount of injected fuel is increased by an extra amount when the engine is in a transient accelerating state. The air pressure within the air inlet passage to the engine is detected by an air pressure sensor, and the load condition is judged by comparing the detected pressure with a reference level. Further, the variation or increment of the detected pressure over each fuel injection period is calculated and compared with a high or a low threshold level selected in accordance with the load condition of the engine. Preferably, the high threshold level is selected when the high load condition continues over a predetermined length of time, the low threshold level being otherwise selected. The amount of transient extra increase is determined in accordance with the result of the comparison of the pressure variation with the selectd threshold level.Type: GrantFiled: June 20, 1989Date of Patent: August 28, 1990Assignees: Mitsubishi Jidosha Kogyo Kabushiki Kaisha, Mitsubishi Denki Kabushiki KaishaInventors: Hiroyuki Nishizawa, Kimito Kashiwabara, Osamu Nako, Mitsuaki Ishii, Kouichi Yamane, Masaaki Miyazaki, Ryoji Nishiyama
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Patent number: 4885691Abstract: The microcomputer applied control unit for use in a vehicle comprises digital data input device for setting a data direction register immediately before the digital data is read via an I/O port, and storage for storing the data thus inputted by the digital data input device.Type: GrantFiled: November 24, 1987Date of Patent: December 5, 1989Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Mitsuaki Ishii, Masaaki Miyazaki, Takahiro Matsunaga
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Patent number: 4837454Abstract: A vehicle control apparatus comprises a condition detection means for detecting an output condition of any of sensors is in a condition which is improbable in practical use and which is a predetermined one, and a controlled variable conversion means for converting information of the specification change-over means for selection control procedures or control data into a controlled variable for an object to be controlled.Type: GrantFiled: November 25, 1987Date of Patent: June 6, 1989Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Mitsuaki Ishii, Masaaki Miyazaki
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Patent number: 4668875Abstract: A waveshaping circuit for providing logic levels from a voltage source to a digital circuit comprising a pull-up (or pull-down) resistor for converting the voltage source into voltage signals of predetermined values, a low-pass filter connected to the resistor for eliminating noise components of the voltage signals, a voltage limiter for limiting the voltage signals to a predetermined voltage range, and a voltage divider for receiving and dividing the voltage signals to supply output voltages of high or low logic levels to the digital circuit.Type: GrantFiled: April 8, 1986Date of Patent: May 26, 1987Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Masaaki Miyazaki, Mitsuaki Ishii
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Patent number: 4620517Abstract: An apparatus for controlling an engine speed through intermittent control of a driving time and a halt time for an engine-speed adjusting actuator (12) in accordance with the output signal of a difference detecting circuit (6) corresponding to the difference between the outputs of a desired speed computing circuit (5) and an actual speed computing circuit (4). The feature of the invention resides particularly in determining the actuator halt time in proportion to the desired quantity of control for the actuator (12) or the engine operation parameter without limiting the said time to any fixed length, hence eliminating overshoot of the engine speed in the control and ensuring satisfactory apparatus capabilities with a short halt time and enhanced response characteristic.Type: GrantFiled: February 22, 1984Date of Patent: November 4, 1986Assignees: Mitsubishi Denki Kabushiki Kaisha, Mitsubishi Jidosha Kogyo Kabushiki KaishaInventors: Mitsuaki Ishii, Masaaki Miyazaki, Noboru Nakamura, Hideo Kakinuma
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Patent number: 4611560Abstract: The present invention is adapted for providing an idling speed control system of an internal combustion engine, which exhibits a good response for changes in an engine load, comprising: a throttle valve which controls the amount of intake air for the engine; an actuator which includes an electric motor for variably controlling the opening of the throttle valve; a rotation speed detector for detecting the rotation speed of the engine; an idling condition detector for detecting the idling condition of the engine; and a control, responsive to the detected output of the idling condition detector means, for generating feedback control pulses to intermittently drive said electric motor so that the detected rotation speed of the engine under the idling condition may converge into a target idling rotation speed while, responsive to the output of a detector that detects the operation condition of the engine load operated under the idling condition of the engine, or to the detected output of said rotation speed detectoType: GrantFiled: December 7, 1984Date of Patent: September 16, 1986Assignees: Mitsubishi Denki Kabushiki Kaisha, Mitsubishi Jidosha Kogyo Kabushiki KaishaInventors: Masaaki Miyazaki, Mitsuaki Ishii, Hajime Kako, Noboru Nakamura, Hideo Kakinuma
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Patent number: 4136333Abstract: A terminal signal operation apparatus is disclosed for transmitting in a multiplex transmission system in both directions signals between the terminal signal operation apparatus and a central operation apparatus for centrally generating control signals for controlling a plurality of electrical devices at terminals in accordance with a signal generated by a signal source.Type: GrantFiled: August 9, 1976Date of Patent: January 23, 1979Assignees: Mitsubishi Denki Kabushiki Kaisha, Toyo Kogyo Co., Ltd.Inventors: Shizuo Sumida, Kazuo Nii, Osamu Shimizu, Atsushi Ueda, Mitsuaki Ishii
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Patent number: 4071889Abstract: A central processing apparatus for use in a system which includes a plurality of remote electrical devices and a multiplex signal transmission line coupled to each of the plurality of devices.Type: GrantFiled: July 22, 1976Date of Patent: January 31, 1978Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Shizuo Sumida, Kazuo Nii, Osamu Shimizu, Atsushi Ueda, Mitsuaki Ishii
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Patent number: 3968477Abstract: A control apparatus for controlling a plurality of electrical devices comprising a plurality of electrical devices, a central operation device for generating a plurality of control signals for controlling the electrical devices, the plurality of control signals comprising a first signal for driving a first electrical device and a second signal delayed in time from the first signal to permit discontinuance of the driving of the first electrical device if a high current is detected passing therethrough, a terminal operation device for each electrical device, a signal transmission line for transmitting the plurality of control signals from the central operation device to the terminal operation devices, a first terminal operation device for driving the first electrical device comprising a signal division circuit for dividing from the plurality of control signals said first and second signals, a driving circuit connected to the signal division circuit for driving the first electrical device in response to said firType: GrantFiled: July 29, 1974Date of Patent: July 6, 1976Assignees: Mitsubishi Denki Kabushiki Kaisha, Toyo Kogyo Co., Ltd.Inventors: Shizuo Sumida, Kazuo Nii, Osamu Shimizu, Atsushi Ueda, Mitsuaki Ishii
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Patent number: 3965366Abstract: An electrical device control system comprising: a plurality of signal sources; a plurality of electrical loads; a central operation apparatus; a plurality of terminal operation apparatus connected to the plurality of electrical loads and having means to detect the operation and a fault of the signal source and a fault of the electrical load and to generate a time division signal thereof; a multiple signal transmission line connecting the plurality of terminal operation apparatus to the central operation apparatus to transmit the time division signal to the central operation apparatus; the central operating apparatus having means to generate an activating signal for transmission over the multiple signal transmission line to the terminal station apparatus to operate an electrical load in response to the detection of the time division signal.Type: GrantFiled: August 30, 1974Date of Patent: June 22, 1976Assignees: Mitsubishi Denki Kabushiki Kaisha, Toyo Kogyo Co., Ltd.Inventors: Shizuo Sumida, Kazuo Nii, Osamu Shimizu, Atsushi Ueda, Mitsuaki Ishii
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Patent number: 3950656Abstract: State detecting apparatus comprising: first, second and third terminals, first and second potential detecting circuits each having an input and an output, a resistance, means connecting the inputs of the first and second potential detecting circuits to the first terminal, means connecting the resistance between the first terminal and a power source, means connecting the output of the first potential detecting circuit to the second terminal, means connecting the output of the second potential detecting circuit to the third terminal.Type: GrantFiled: August 30, 1974Date of Patent: April 13, 1976Assignees: Toyo Kogyo Co., Ltd., Mitsubishi Denki Kabushiki KaishaInventors: Shizuo Sumida, Kazuo Nii, Osamu Shimizu, Atsushi Ueda, Mitsuaki Ishii
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Patent number: 3946362Abstract: A time division multiple transmission control apparatus which comprises a central processing device for generating a reference timing signal having a predetermined frequency and a time division multiple signal having substantially the same frequency for controlling a plurality of electrical devices during predetermined time periods, terminal processing devices for controlling each electrical device during a different predetermined time period under the control of said reference timing signal and said time division multiple signal and means for generating a phase difference between said reference timing signal and said time division multiple signal.Type: GrantFiled: July 12, 1974Date of Patent: March 23, 1976Assignees: Mitsubishi Denki Kabushiki Kaisha, Toyo Kogyo Co., Ltd.Inventors: Shizuo Sumida, Kazuo Nii, Hisatsugu Ito, Atsushi Ueda, Mitsuaki Ishii