Patents by Inventor Mitsunori Takao
Mitsunori Takao 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: 5617009Abstract: A battery charging circuit performs rapid charging without over-charging followed by supplementary charging to insure a fully charged rechargeable battery. The amount of supplementary charging is increased at low ambient temperatures and decreased at high temperatures. A primary charging circuit means for rapid charging and a supplementary charging circuit means for supplementary charging are provided. A temperature sensing means measures ambient temperature during rapid charging to establish the amount of supplementary charging required.Type: GrantFiled: June 1, 1994Date of Patent: April 1, 1997Assignee: Sanyo Electric Co., Ltd.Inventors: Mitsunori Takao, Toshiharu Kokuga, Takanao Matsumoto, Hiroaki Sakurai
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Patent number: 5447139Abstract: The present invention relates to a fuel supplying device for an internal combustion engine having multiple cylinder.The present invention comprises a plurality of fuel injection valves, a fuel pipe through which fuel flows, and a plurality of holder means on the fuel pipe so that the fuel from the fuel pipe is supplied to the holder means. The holder means accommodates the fuel injection valve so that the fuel is supplied to the fuel injection valve, and a start timing of the fuel supplied from the fuel pipe to at least one of the holder means is different from the start timing of the fuel supplied from the fuel pipe to the remaining holder means.Type: GrantFiled: December 13, 1993Date of Patent: September 5, 1995Assignee: Nippondenso Co., Ltd.Inventors: Masao Yonekawa, Hirotada Yamada, Mitsunori Takao, Ryo Nagasaka
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Patent number: 5406486Abstract: A vehicle slip control system for controlling a wheel slip based on a friction coefficient of a road surface measures an engine torque T.sub.E by applying an intake pipe negative pressure Pm and a number of engine revolutions Ne to an engine model. A drive torque T is measured by applying the engine torque T.sub.E to an A/T model, and a driving wheel acceleration d.omega. is obtained by finding a difference of a detected driving wheel speed .omega.. By filtering this driving wheel acceleration d.omega., a post-filter driving wheel acceleration d.omega..sub.0 is calculated. A squat force Ws is calculated from the drive-torque T and the post-filter driving wheel acceleration d.omega., and a friction coefficient .mu. of the road surface is estimated from the squat force Ws. The estimated friction coefficient .mu. is used to control a wheel slip.Type: GrantFiled: October 8, 1993Date of Patent: April 11, 1995Assignee: Nippondenso Co., Ltd.Inventors: Shigeru Kamio, Mitsuo Hara, Hitoshi Tasaka, Katsuya Sakita, Mitsunori Takao
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Patent number: 5273015Abstract: The present invention comprises a plurality of fuel injection valves, a fuel pipe through which fuel flows, and a plurality of holder means on the fuel pipe so that the fuel from the fuel pipe is supplied to the holder means. The holder means accommodates the fuel injection valve so that the fuel is supplied to the fuel injection valve, and a start timing of the fuel supplied from the tuel pipe to at least one of the holder means is different from the start timing of the fuel supplied from the fuel pipe to the remaining holder means.Type: GrantFiled: January 23, 1992Date of Patent: December 28, 1993Assignee: Nippondenso Co., Ltd.Inventors: Masao Yonekawa, Hirotada Yamada, Mitsunori Takao, Ryo Nagasaka
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Patent number: 5211682Abstract: A fuel feed apparatus of an internal combustion engine comprises: a passage member which is formed with a fuel passage serving to direct fuel injected from a fuel injection valve toward respective intake valves of the internal combustion engine, assist air passage through which assist air is jetted so as to cross the fuel injected from the fuel passage, and a cylindrical guide portion serving to regulate a spray cone angle of the fuel when the assist air is jetted from the assist air passages; and an interrupter device for interrupting the supply of the assist air to the air assist passages in accordance with the operating condition of the internal combustion engine, so that sprays of fuel directed to the plurality of intake valves individually are formed by the fuel passage when the interrupter device cuts off the assist air, while a single spray of fuel atomized by the assist air the spray cone angle of which is regulated by the guide portion is formed when the interrupter device allows the assist air to beType: GrantFiled: June 9, 1992Date of Patent: May 18, 1993Assignee: Nippondenso Co., Ltd.Inventors: Hisashi Kadowaki, Yasuhide Tani, Mitsunori Takao, Kiyoshi Nagata, Haruo Suzuki
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Patent number: 5159990Abstract: A slip control apparatus for use in a motor vehicle having an engine for generating a motive power to drive the motor vehicle. The apparatus comprises a first detector for detecting a speed of a driven wheel of the motor vehicle which is driven by the motive power generated from the engine, a second detector for detecting a running speed of the motor vehicle and a third detector for detecting an acceleration of the driven wheel. Also included in the apparatus are a decision unit for determining the occurrence of slipping of the driven wheel on the basis of the detection results of the first and second detectors, a driving force adjusting device for adjusting a driving force of the motor vehicle, and a control unit for controlling the slip of the driven wheel on the basis of information from the first to third detectors.Type: GrantFiled: March 27, 1991Date of Patent: November 3, 1992Inventors: Tomoaki Abe, Katsuya Maeda, Mitsuo Hara, Shigeru Kamio, Mitsunori Takao
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Patent number: 5101786Abstract: A control apparatus for use in an internal combustion engine system of a motor vehicle equipped with an automatic transmission having therein a lock-up mechanism. There is included a vehicle resonance reducing section for controlling an opening degree of a throttle valve when the motor vehicle is in an acceleration state so as to reduce a vehicle resonance accompanying an operation of the engine. The vehicle resonance reducing section estimates a torque to be required for the engine on the basis of an accel-operating amount due to the vehicle drive and the engine operating state and corrects the estimated torque by using operation variables of the motor vehicle so as to calculate a target throttle opening degree. Also included in the control apparatus is a lock-up control section for compulsorily locking up the automatic transmission when the vehicle resonance reducing section is in operation.Type: GrantFiled: March 25, 1991Date of Patent: April 7, 1992Assignee: Nippondenso Co., Ltd.Inventors: Shigeru Kamio, Mitsunori Takao, Mitsuo Hara, Katsuya Sakita
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Patent number: 5095876Abstract: The present invention relates to a fuel supplying device for an internal combustion engine having multiple cylinder. The present invention comprises a plurality of fuel injection valves, a fuel pipe through which fuel flows, and a plurality of holder means on the fuel pipe so that the fuel from the fuel pipe is supplied to the holder means. The holder means accommodates the fuel injection valve so that the fuel is supplied to the fuel injection valve, and a start timing of the fuel supplied from the fuel pipe to at least one of the holder means is different from the start timing of the fuel supplied from the fuel pipe to the remaining holder means.Type: GrantFiled: September 27, 1990Date of Patent: March 17, 1992Assignee: Nippondenso Co., Ltd.Inventors: Masao Yonekawa, Hirotada Yamada, Mitsunori Takao, Ryo Nagasaka
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Patent number: 5018595Abstract: A traction control system controls the engine torque so as to prevent wheel slip during acceleration. The system has an electric control unit ECU which detects the state of wheel slip on the basis of the deviation of the drive wheel speed from a target drive wheel speed computed in accordance with signals from various sensors such as drive wheel speed sensors, trailing wheel speed sensors, shift position sensor for sensing the shift position in an electronic control transmission ECT, engine speed sensor and accelerator sensor for sensing the amount of operation of accelerator. The ECU computes, in accordance with the state of the slip, a limit drive torque which does not allow surplus wheel slip during acceleration.Type: GrantFiled: June 2, 1990Date of Patent: May 28, 1991Assignee: Nippondenso Co., Ltd.Inventors: Mitsuo Hara, Shigeru Kamio, Mitsunori Takao, Katsuya Sakita, Tomoaki Abe
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Patent number: 4919103Abstract: An apparatus for treating fuel vapor, such as in a motor vehicle fuel tank, by subjecting it to adsorption treatment to prevent its direct emission into the atmosphere. The apparatus according to the present invention comprises a fuel tank, a partitioning wall provided within the fuel tank to define a small fuel storage chamber within the fuel tank, a canister container housed in the small fuel storage chamber, the canister container storing therein a fuel adsorbing material. When fuel feeding takes place, feeding fuel is introduced into the small fuel storage chamber to cool the canister container. However, when the engine is operated, high temperature return fuel is introduced into the small storage chamber to heat the canister container thereby promoting the adsorbing and de-adsorbing action of fuel by the fuel adsorbing material.Type: GrantFiled: January 20, 1988Date of Patent: April 24, 1990Assignee: Nippondenso Co., Ltd.Inventors: Yuji Ishiguro, Hiroyuki Hosokawa, Nobuhiko Koyama, Eiji Hiramatsu, Mitsunori Takao, Tomoaki Abe, Masashi Kiyono, Katsuya Maeda, Shigeru Kamio
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Patent number: 4890590Abstract: In an engine control system which determines the amount of fuel to be injected on the basis of an intake pipe pressure detected downstream of a throttle valve and engine speed (D-EFI), fail-safe action is provided when a failure of an intake pipe on the downstream side of the throttle valve is detected. The fail-safe apparatus of the present invention is designed to signal the occurrence of an abnormality with the intake system when the throttle valve is not being opened, that is, the throttle valve is stationary or is closing, a vehicle speed variation exceeds its specific value and the engine speed exceeds its specific value. When these conditions are detected, engine power is controlled lower, thereby assuring vehicle driving safety.Type: GrantFiled: November 15, 1988Date of Patent: January 2, 1990Assignee: Nippondenso Co., Ltd.Inventors: Shinichi Iwamoto, Shigenori Isomura, Mitsunori Takao, Kenichiro Kamai
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Patent number: 4867126Abstract: A system for suppressing discharge of evaporated fuel gas is adapted to introduce the evaporated fuel gas generated in a fuel tank of an internal combustion engine into an intake passage, to suppress the discharge of the evaporated fuel gas into the atmosphere. The system comprises an evaporated fuel gas passage allowing the evaporated fuel gas within the fuel tank to be introduced into the intake passage and a controller variably controlling a cross-sectional area of the evaporated gas passage depending upon an operating condition of the engine. The cross-sectional area of the evaporated gas passage is controlled according to an amount of fuel supplied to the engine. In addition, the cross-section area of the evaporated gas passage may be controlled in response to the operating condition of the engine and may be controlled according to a preliminarily set comparative rotational speed in an idling condition of the engine.Type: GrantFiled: July 11, 1986Date of Patent: September 19, 1989Assignee: Nippondenso Co., Ltd.Inventors: Masao Yonekawa, Mitsunori Takao
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Patent number: 4866620Abstract: A control system and method for an internal combustion engine in which an intake air pressure sensor of semiconductor or strain gauge type arranged in an intake manifold is used to detect the intake air pressure at a timing at or after bottom dead center during the intake stroke, the timing being detected by detection of a predetermined crank angle at or after bottom dead center or the zero of intake air flow rate. Operating conditions of the internal combustion engine are controlled early by an air pressure detection signal. For example, the air-fuel ratio of the mixture gas before combustion is estimated to control the ignition timing.Type: GrantFiled: August 14, 1987Date of Patent: September 12, 1989Assignee: Nippondenso Co., Ltd.Inventors: Tomoaki Abe, Masahi Kiyono, Mitsunori Takao
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Patent number: 4854283Abstract: A control apparatus for electrically operating a throttle valve adapted to adjust the amount of air drawn into an internal combustion engine to adjust the position of the throttle valve. The position and operating condition of an accelerator pedal are electrically detected to generate a signal in accordance with the accelerator position to drive an actuator adapted to operate the throttle valve, and also a desired throttle position established by the signal, the detected actual position of the throttle valve and the operating condition of the accelerator pedal are suitably compared and examined, thus monitoring to see whether the detection of the accelerator position is not faulty, whether the throttle valve is controlled to follow the desired throttle position and so on and thereby performing a safe control by using a substitute desired position upon occurrence of a faulty condition.Type: GrantFiled: November 25, 1987Date of Patent: August 8, 1989Assignee: Nippondenso Co., Ltd.Inventors: Masashi Kiyono, Kanji Takeuchi, Tomoaki Abe, Mitsunori Takao
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Patent number: 4850325Abstract: A fault detection system for detecting a fault of a subcontrol apparatus as well as a main control apparatus backed up thereby in controlling the operation of an actuator for an internal combustion engine control apparatus such as a throttle control apparatus is disclosed. A second fault detection apparatus for the subcontrol apparatus is made up of a CPU consituting the main control apparatus, so that the fault detection apparatus for the subcontrol apparatus operates under condition that the main control apparatus is normal and the engine is preferably under a light load of operation. Each of the main control and the backup subcontrol apparatuses includes a fault detection apparatus, thereby preventing simultaneous fault of the two control apparatuses for improved safety of the vehicle drive.Type: GrantFiled: January 12, 1989Date of Patent: July 25, 1989Assignee: Nippondenso Co., Ltd.Inventors: Tomoaki Abe, Mitsunori Takao, Masashi Kiyono
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Patent number: 4838226Abstract: An apparatus for controlling intake air flow rate in an internal combustion engine comprises a throttle valve disposed in intake air passage for swing movement to change a flow rate of air to be supplied to combustion chambers of the engine, a stopper portion to which the throttle valve is abutted so as to stop swinging thereof in a full closed portion thereof, a spring for continually urging the throttle valve towards the full closed position, a control unit for determining a desired opening degree of the throttle valve in accordance with requirements on the engine, an actuator for generating a driving force for swinging the throttle valve to the desired opening degree in accordance with a command signal from the control unit, and geared mechanism for transmitting the driving force from the actuator to the throttle valve. The geared mechanism includes a pair of gears, each having a gear tooth portion. The gears are able to engage with each other exclusively at such gear tooth portions.Type: GrantFiled: May 6, 1988Date of Patent: June 13, 1989Assignee: Nippondenso Co., Ltd.Inventors: Toshio Matsuzawa, Kazuji Minagawa, Akira Muramatsu, Tomoaki Abe, Masashi Kiyono, Shigeru Kamio, Katsuya Maeda, Mitsunori Takao
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Patent number: 4817576Abstract: A vaporized fuel control apparatus for an internal combustion engine. Fuel vapor formed in the fuel tank during the refuelling period is adsorbed to a refuelling canister and fuel vapor formed in the fuel tank during the engine running period is adsorbed to a running canister. The canisters are controlled in a manner that the amount of the fuel vapor discharged into the intake system of the engine from the refuelling canister is smaller than that of the running canister.Type: GrantFiled: November 20, 1987Date of Patent: April 4, 1989Assignee: Nippondenso Co., Ltd.Inventors: Tomoaki Abe, Masashi Kiyono, Mitsunori Takao
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Patent number: 4805576Abstract: A fault detection system for detecting a fault of a subcontrol apparatus as well as a main control apparatus backed up thereby in controlling the operation of an actuator for an internal combustion engine control apparatus such as a throttle control apparatus is disclosed. A second fault detection apparatus for the subcontrol apparatus is made up of a CPU constituting the main control apparatus, so that the fault detection apparatus for the subcontrol apparatus operates under condition that the main control apparatus is normal and the engine is preferably under a light load of operation. Each of the main control and the backup subcontrol apparatuses includes a fault detection apparatus, thereby preventing simultaneous fault of the two control apparatuses for improved safety of the vehicle drive.Type: GrantFiled: March 25, 1988Date of Patent: February 21, 1989Assignee: Nippondenso Co., Ltd.Inventors: Tomoaki Abe, Mitsunori Takao, Masashi Kiyono
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Patent number: 4796591Abstract: Disclosed in an internal combustion engine control system for controlling at least one of the quantity of intake air and quantity of fuel supply, and to an internal combustion engine control system for controlling the air-fuel ratio of the mixture. The invention particularly relates to the control of the engine at a transition of operating condition. The former control system detects the change in one of the quantity of intake air and quantity of fuel supply and compensates the other, thereby controlling the engine by anticipation at a transition of control condition.Type: GrantFiled: August 19, 1987Date of Patent: January 10, 1989Assignee: Nippondenso Co., Ltd.Inventors: Masashi Kiyono, Tomoaki Abe, Mitsunori Takao
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Patent number: 4785779Abstract: A detector for detecting amount of suction air or rotating speed of an internal combustion engine supplies the detection signal to a control circuit, which supplies a drive signal to an air control valve mounted in a suction pipe of the internal combustion engine in accordance with the detection signal from the detector so that an idling rotating speed of the internal combustion engine is increased to a predetermined speed.Type: GrantFiled: March 11, 1987Date of Patent: November 22, 1988Assignee: Nippondenso Co., Ltd.Inventors: Mitsunori Takao, Takashi Arimura, Masao Yonekawa