Patents by Inventor Keisuke Kawai

Keisuke Kawai 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).

  • Publication number: 20110144885
    Abstract: A control apparatus for an internal combustion engine is provided that can precisely reflect requirements relating to performance of the internal combustion engine in a control amount of each actuator by compensating for weaknesses in the so-called torque demand control. A requirement value of each of torque, efficiency, and an air-fuel ratio, and engine information are inputted to an engine inverse model. The engine inverse model is then used to calculate actuator requirement values for achieving those requirement values. An actuator direct requirement value directly required of each of actuators is also acquired. Control of the actuators is adapted to be changed between that according to the actuator requirement value and that according to the actuator direct requirement value.
    Type: Application
    Filed: May 29, 2009
    Publication date: June 16, 2011
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Kaoru Ohtsuka, Shinichi Soejima, Keisuke Kawai, Hiroyuki Tanaka, Hayato Nakada, Naoto Kato
  • Publication number: 20110087421
    Abstract: A control device for an internal-combustion engine designed to ensure that required responsiveness is obtained as actual torque responsiveness with respect to a torque demand even when the torque responsiveness with respect to the actuation of a particular actuator is affected by the operating conditions. A response compensating filter is provided at a preceding stage to an air inverse model, and the target torque which has been corrected by the response compensating filter is converted by the air inverse model to obtain a target opening degree of a throttle. A time constant of the response compensating filter is set on the basis of the operating conditions of the internal-combustion engine so that the responsiveness of actual torque with respect to the torque demand reaches a preset standard responsiveness.
    Type: Application
    Filed: May 29, 2009
    Publication date: April 14, 2011
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Shinichi Soejima, Ken Koibuchi, Hirotada Otake, Keisuke Kawai
  • Publication number: 20110022288
    Abstract: A control device that is used with an internal combustion engine to improve both the response and controllability of torque generated by the internal combustion engine. The control device calculates an operation amount of an intake actuator in accordance with a demanded air amount. The control device then calculates a torque that is generated when the intake actuator is operated by the calculated operation amount at a predetermined ignition timing setting, and calculates an ignition timing retard amount that is necessary to achieve a demanded torque in accordance with the difference between the calculated torque and the demanded torque. The control device ensures that the demanded torque and a demanded efficiency are both reflected in the demanded air amount.
    Type: Application
    Filed: October 31, 2008
    Publication date: January 27, 2011
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Shinichi Soejima, Naoto Kato, Keisuke Kawai
  • Publication number: 20100268436
    Abstract: This invention is intended to ensure that a control device for a vehicle drive unit is capable of realizing desired torque by making the main-actuator and sub-actuator collaborate adequately while holding the interposition of the sub-actuator as low as possible. For this end, a future target of torque that is going to be output from the engine and a realization timing of the future target are taken as reservation information for reserving engine torque regulation. Next, the required period, which is required to realize the future target when a main-actuator (a throttle) is operated to regulate the torque, is computed from a current engine operating condition. Then, the operation of the main-actuator is started at the timing preceding the realization timing by the required period for realizing the future target.
    Type: Application
    Filed: October 1, 2008
    Publication date: October 21, 2010
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Shinichi Soejima, Junichi Kako, Kaoru Ohtsuka, Hiroyuki Tanaka, Keisuke Kawai
  • Publication number: 20100211287
    Abstract: The internal combustion engine control device includes a request output section and a mediation section. The request output section expresses a plurality of requests about internal combustion engine functions (drivability, exhaust gas, and idling) in terms of physical quantities (torque, efficiency, and air-fuel ratio) and outputs the requests. The mediation section collects a plurality of requests A-C expressed in terms of the same physical quantity and conducts mediation in accordance with a predefined rule to determine one request value E. The requests A-C output from the request output section are defined on the basis of the range of request values and the distribution of expected values indicative of the degree of expectation of request values within the range. The mediation section calculates the sum D of the expected values of the plurality of requests A-C and conducts mediation to determine the request value E that prevails when the sum is maximized.
    Type: Application
    Filed: December 1, 2008
    Publication date: August 19, 2010
    Inventors: Kaoru Ohtsuka, Hiroyuki Tanaka, Keisuke Kawai, Shinichi Soejima
  • Publication number: 20100211246
    Abstract: A calculation load of a vehicle control apparatus is reduced. When a control target value is determined by mediating three or more requests having set priorities relative to a control variable to be controlled in a vehicle, these requests are sequentially selected in descending order of the priorities and a request overlap portion is sequentially calculated. If, at this time, there is no request overlap portion in the middle of the process, the control target value is determined by omitting the process of calculating the request overlap portion for requests having lower priorities than the request, in relation to which the request overlap portion no longer exists. When there is no longer a request overlap portion, a value closest to a request selected last in a range of the request overlap portion existing last is determined as the control target value. The priorities are set based on an operating condition of the vehicle.
    Type: Application
    Filed: December 13, 2007
    Publication date: August 19, 2010
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Keisuke Kawai
  • Publication number: 20100198485
    Abstract: A control apparatus for an internal combustion engine that accurately incorporates demands related to various capabilities of the internal combustion engine. A demand output unit outputs various capability demands of the internal combustion engine, expressed in terms of either torque, efficiency, or an air-fuel ratio data. A torque mediation unit collects only the demand values expressed in terms of torque, and mediates the torque demand values into one. An efficiency mediation unit collects the demand values expressed in terms of efficiency and mediates the efficiency demand values into one. An air-fuel ratio mediation unit collects the demand values expressed in terms of the air-fuel ratio and mediates the air-fuel ratio demand values into one. A control variable computing unit computes control variables of actuators, based upon the torque demand value, efficiency demand value, and air-fuel ratio demand value output from the mediation units.
    Type: Application
    Filed: July 11, 2008
    Publication date: August 5, 2010
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Kaoru Ohtsuka, Shinichi Soejima, Naoto Kato, Hiroyuki Tanaka, Hayato Nakada, Keisuke Kawai
  • Publication number: 20100191406
    Abstract: A control apparatus for a vehicle drive unit including a control structure of a hierarchical type having a demand generation level, a mediation level, and a control variable setting level and a signal is transmitted in one direction from a higher level of hierarchy to a lower level of hierarchy. The demand generation level includes demand output elements for each capability. The mediation level includes mediation elements, each corresponding to a classified category of demands. Each of the mediation elements collects demand values of the category of which the mediation elements are in charge and performs mediation according to a rule to arrive at a single demand value. The control variable setting level includes an adjuster portion adjusting each of the mediated demand values based on a relationship between each other and control variable calculation elements calculating a control variable of each of a plurality of actuators based on the adjusted demand value.
    Type: Application
    Filed: July 8, 2008
    Publication date: July 29, 2010
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Hiroyuki Tanaka, Junichi Kako, Kaoru Ohtsuka, Shinichi Soejima, Keisuke Kawai, Naoto Kato, Hayato Nakada
  • Publication number: 20100138077
    Abstract: This invention is intended to ensure that a vehicle control method or vehicle control device is capable of achieving the object of each of a plurality of control logics in a balanced manner and performing an appropriate control for the vehicle as a whole. Demands concerning a plurality of control parameters of a vehicle are output from each of a plurality of control logics having an object individually. The target value of each of the control parameters is determined by mediating the demands from each of the control logics with respect to each kind of control parameter. In doing so, the demand from the control logic whose demand has been reflected to the target value in the already-performed mediation is withdrawn or relieved in the following mediation.
    Type: Application
    Filed: April 1, 2008
    Publication date: June 3, 2010
    Applicant: Toyota Jidosha Kabushiki Kaisha
    Inventor: Keisuke Kawai
  • Publication number: 20100017095
    Abstract: The present invention provides an internal combustion engine control device which is capable of implementing a plurality of functions desired to the internal combustion engine. An adder unit determines a total energy E_total that should be generated by the engine by adding a target work, a target exhaust energy and cooling heat loss, which are calculated in a style of energy. A target fuel supply quantity calculation unit calculates a target fuel supply quantity necessary for generating the E_total. A target intake quantity calculating unit calculates a target intake quantity based on the target fuel supply quantity and a target A/F. A target ignition timing calculation unit calculates a target ignition timing necessary for realizing the target exhaust energy.
    Type: Application
    Filed: March 27, 2008
    Publication date: January 21, 2010
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Shinichi Soejima, Keisuke Kawai, Hiroyuki Tanaka
  • Publication number: 20100004829
    Abstract: A torque control device for a power system and facilitates the addition of a new torque control actuator. A target torque signal according to a target torque for the power system is distributed to each actuator in a predetermined distribution priority order. A signal processing filter is mounted on a signal input section of each actuator and allows only a portion of distributed signal that matches the operation characteristics of the actuator to pass through as a command signal for the actuator.
    Type: Application
    Filed: September 6, 2007
    Publication date: January 7, 2010
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Hiroyuki Tanaka, Keisuke Kawai, Hayato Nakada, Kaoru Ohtsuka, Yuichiro Sawada, Shinichi Soejima
  • Publication number: 20090101443
    Abstract: An object is to supply a fixed amount of oil determined in advance. In the present invention, a lubricating device that supplies oil to each sliding device of a printing machine includes a lubricating section and a metered valve. The lubricating section ejects oil in an oil reservoir section into a piping when lubrication is performed. The metered valve is configured to eject oil accumulated in an ejection side cylinder chamber from an ejection opening by oil pressure from the oil ejected into the piping. The oil ejected into the piping is accumulated in a supply side cylinder chamber. When a lubricating pump is stopped and depressurized, the oil accumulated in the supply side cylinder chamber moves to the ejection side cylinder chamber.
    Type: Application
    Filed: February 26, 2007
    Publication date: April 23, 2009
    Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventor: Keisuke Kawai