Mitsubishi Electric Corporation

Mitsubishi Denki Kabushiki Kaisha

Calpis Co., Ltd.

Masahiko Nomura

Kenichi Yamagata

Mitsuaki Shirasaki

Koji Hashimoto

Kohji Hashimoto

Akihiro Masuyama

Shingo Takahashi

Masaaki Yasui

Hidehiko Yokogoshi

Provided is a control unit () for setting, for respective electronic throttles () and () provided for respective cylinders, respective ranges of a difference between a target rpm and an engine rpm where the electronic throttles () and () are not operated as a first dead zone and a second dead zone, determining, for each of the electronic throttles () and (), whether or not the difference between the target rpm and the engine rpm is in the dead zone, preventing the electronic throttle determined to have the difference in the dead zone from operating, and determining, for the electronic throttle determined to have the difference exceeding the dead zone, a control gain for the electronic throttle depending on the magnitude of the difference, thereby operating the electronic throttle.

Control device and method for internal combustion engine

An intake air mass estimation unit is provided that sets predetermined degrees of crank angle to an angle that can divide an intake stroke into a plurality of sections, measures at every the predetermined degrees of crank angle the pressure downstream of the throttle valve and the time taken for the predetermined degrees of crank angle rotation, estimates the intake air mass flowing from the upstream to downstream of the throttle valve at every the predetermined degrees of crank angle, using the pressure downstream of the throttle valve and the time taken for the predetermined degrees of crank angle rotation measured at every the predetermined degrees of crank angle, and integrates the intake air mass at every the predetermined degrees of crank angle for 720 degrees of crank angle rotation, thereby estimating the intake air mass needed for one combustion.

Intake air mass estimation apparatus for motorcycle

A motorcycle's transmission control device is provided in which, in a case of a clutchless shift operation, disengagement of a fit of gears of a transmission and the fit of subsequent gears thereof can be smoothly achieved. A throttle operation unit controls the degree of opening of a throttle valve to become a first throttle opening-degree when a clutchless shifting unit determines that a clutchless down-shift operation can be implemented, and controls the degree of opening of the throttle valve to become a second throttle opening-degree when the clutchless shifting unit determines that a fit between shift gears is disengaged by the clutchless down-shift operation.

Transmission control device of motorcycle

A vehicle-mounted engine control apparatus can accurately measure the resistance value of a label resistor arranged in an exhaust gas sensor for correcting characteristic variation thereof by using a reduced number of wires. An electric heater of the exhaust gas sensor, which is powered from a second power supply wire, as well as the label resistor and air fuel ratio measurement elements are connected to the apparatus which is powered from an on-vehicle battery through a first power supply wire. A power feed voltage of the apparatus is input to a multichannel AD converter through voltage dividing resistors, so that a positive end potential of the label resistor is measured alternatively. A negative end potential of the label resistor is input to the converter as a divided voltage thereof with a fixed resistor. The label resistance value is calculated from a fixed resistor current and a label resistor voltage.

Vehicle-mounted engine control apparatus

A temperature control apparatus for an exhaust gas sensor can promptly heat the exhaust gas sensor with an electric heater up to an activation temperature while preventing thermal shock damage thereof due to water immediately after engine starting. Energization of an electric heater arranged near an exhaust gas sensor is controlled by a CPU cooperating with a ROM through a switching element. A low voltage is supplied for evaporation of the water by a first preheater immediately after engine starting, and enhanced preheating is subsequently carried out by a second preheater for preventing thermal shock on the exhaust gas sensor. Thereafter, a heating controller performs automatic control with a proper activation temperature of the exhaust gas sensor being made as a target. The temperature controlled by the first preheater is set to such a temperature level at which rapid cooling damage of the exhaust gas sensor due to the water will not be caused but the water can be evaporated.

Temperature control apparatus for exhaust gas sensor

A physiologically functional food having brain function-improving, learning ability-enhancing and memory-enhancing functions, which comprises as an active ingredient a lactic acid bacterium fermented milk, a lactic acid bacterium and yeast co-fermented milk, or a treated product thereof, or a mixture thereof, optionally also including a pharmaceutically or nutritionally acceptable carrier or diluent.

Growing community of inventors

Tokyo, Japan

Masahiko Nomura