Toyota Jidosha Kabushiki Kaisha

Director-general of Agency of Industrial Science and Technology

Agency of Industrial Science & Technology-director-general

Yukio Kuroda

Tomoyuki Yoshida

Akihiro Katayama

Hiroshi Sawada

Naoto Kato

Yoshiaki Kikuchi

Toshinari Nagai

Takahiro Uchida

Nobuo Watanabe

Yasuhiro Kuze

Shinji Kojima

Naoki Baba

An air-fuel ratio control apparatus estimates, on the basis of an exhaust air-fuel ratio of exhaust gas flowing into an exhaust purifying catalyst unit disposed in an exhaust passage of an engine, an emission of at least one specific component contained in exhaust gas flowing out of the exhaust purifying catalyst unit. The air-fuel ratio control apparatus performs the estimation by use of a model, and controls the air-fuel ratio in such a manner that the estimation value reaches a target state. The model is previously determined in consideration of the mass balance of the specific component.

Air-fuel ratio control apparatus for internal combustion engine

Means for estimating the charged state of a battery, capable of accurately estimating an SOC even though the battery repeats charging/discharging in short cycles. The charging/discharging current Ib measured by current sensing means (,) is integrated, and pseudo-SOC estimating means estimates a pseudo-SOC. Electromotive force estimating means (,) estimates the open voltage Voc from the pseudo-SOC. Voltage change estimating means (,) estimates the voltage change Vr due to the internal resistance from the charging/discharging current Ib. Dynamic voltage change estimating means (,) estimates the voltage change Vdyn due to the change of the charging/discharging current. An adder (,) adds the Voc, Vr, and Vdyn to calculate an estimated voltage Vest of the battery. SOC correction calculating means (,) calculates the correction of the SOC for equalizing the estimated voltage Vest to the measured voltage Vmes measured by voltage sensing means (,), and an adder (,) adds the correction to the pseudo-SOC to estimate the SOC of the battery.

Means for estimating charged state of battery and method for estimating degraded state of battery

An apparatus and method are provided for analyzing information relating to the physiological and psychological conditions of a driver. Psychological conditions such as comfortableness or degree of alertness are estimated on the basis of physical data such as fluctuation in brain waves. This apparatus comprises a first neural network having a pre-processed 1/f fluctuation signal for brain waves as an input and for estimating a degree of alertness of the driver, and a second neural network receiving the estimated degree of alertness and the pre-processed 1/f fluctuation signal, for estimating and outputting driving comfortableness. By employing a neural network, which has a mapping ability as well as flexible adaptability even for non-linear data, based on the learning function, more accurate estimation of mental conditions can be achieved in comparison with conventional statistical analysis.

Apparatus and method for analyzing information relating to physical and

Growing community of inventors

Susono, Japan

Yukio Kuroda