Patents by Inventor Takahide Kyuuma

Takahide Kyuuma 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).

  • Control apparatus and control method for direct injection engine
    Patent number: 6647949
    Abstract: A fuel-injected engine is operated in a compression stroke injection mode or an intake stroke injection mode. The intake flow rate appropriate for the compression stroke injection mode is greater than that of the intake stroke injection mode. When the engine is cold, the ECU determines the amount of fuel injected in accordance with the actual intake flow rate. The ECU controls a throttle valve such that the intake flow rate is appropriate for the selected fuel injection mode before the fuel injection mode is actually switched. As a result, fluctuations of the engine speed caused by switching the fuel injection mode are reduced.
    Type: Grant
    Filed: October 23, 2001
    Date of Patent: November 18, 2003
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Osamu Hosokawa, Noboru Takagi, Takahide Kyuuma
  • Fuel injection control apparatus and fuel injection control method for direct injection engine
    Patent number: 6647948
    Abstract: An engine has an injector, which directly injects fuel into a combustion chamber. When the coolant temperature during the cranking of the engine is low, an ECU controls the injector such that the engine is operated in a compression stroke injection mode. When the engine is operated in the compression stroke injection mode, the ECU controls the injector to advance the fuel injection timing in accordance with an increase of the coolant temperature. As a result, the engine reduces the amount of unburned discharge gas, provides improved ignition and combustion, and provides stable idling.
    Type: Grant
    Filed: October 17, 2001
    Date of Patent: November 18, 2003
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Takahide Kyuuma, Noboru Takagi, Osamu Hosokawa
  • Fuel injection control apparatus and fuel injection control method for direct injection engine
    Publication number: 20020046729
    Abstract: An engine has an injector, which directly injects fuel into a combustion chamber. When the coolant temperature during the cranking of the engine is low, an ECU controls the injector such that the engine is operated in a compression stroke injection mode. When the engine is operated in the compression stroke injection mode, the ECU controls the injector to advance the fuel injection timing in accordance with an increase of the coolant temperature. As a result, the engine reduces the amount of unburned discharge gas, provides improved ignition and combustion, and provides stable idling.
    Type: Application
    Filed: October 17, 2001
    Publication date: April 25, 2002
    Inventors: Takahide Kyuuma, Noboru Takagi, Osamu Hosokawa
  • Control apparatus and control method for direct injection engine
    Publication number: 20020046730
    Abstract: A fuel-injected engine is operated in a compression stroke injection mode or an intake stroke injection mode. The intake flow rate appropriate for the compression stroke injection mode is greater than that of the intake stroke injection mode. When the engine is cold, the ECU determines the amount of fuel injected in accordance with the actual intake flow rate. The ECU controls a throttle valve such that the intake flow rate is appropriate for the selected fuel injection mode before the fuel injection mode is actually switched. As a result, fluctuations of the engine speed caused by switching the fuel injection mode are reduced.
    Type: Application
    Filed: October 23, 2001
    Publication date: April 25, 2002
    Inventors: Osamu Hosokawa, Noboru Takagi, Takahide Kyuuma