Honda Motor Co., Ltd.

Tetsuaki Nakano

Ken Ogawa

Toshinari Shinohara

Masayuki Kawamura

Toru Kitamura

Atsushi Umemoto

Mitsuru Sugimoto

Yasuo Matsumoto

An internal state estimating device includes an electrolysis resistance calculating part calculating a post-deterioration resistance value of an electrolysis resistive component using a detection value from a sensor, a reaction resistance calculating part calculating a post-deterioration resistance value of a reaction resistive component using a resistance increase ratio and an initial resistance value of an reaction resistor, wherein the resistance increase ratio is a ratio of the post-deterioration resistance value of the electrolysis resistive component to an initial resistance value of an electrolysis resistor, and a capacitance calculating part calculating a post-deterioration capacitance value of an electric double-layer capacitive component using the resistance increase ratio and an initial capacitance value of the electric double-layer capacitive component.

Internal state estimating device

A battery-state estimating device for accurately estimating a battery state of a battery includes: an OCV calculating unit calculating an OCV from the detected values; a charge state estimating unit deriving charge state parameters on the basis of the calculated OCV and an Ah (integrated current value)-OCV map; a map adjusting unit adjusting the Ah-OCV map, wherein the map adjusting unit derives a model equation of the Ah-OCV map on the basis of a first OCV at a first time-point and a second OCV at a second time-point calculated by the OCV calculating unit, and the difference between the integrated current values, wherein the difference has been generated by current flowing through the secondary batteryduring the first time-point and the second time-point; and adjusts the Ah-OCV map using the model equation.

Device and method for estimating battery state

A control system for an internal combustion engine, which can determine just enough amounts of demanded combustion fuel and auxiliary fuel during execution of auxiliary fuel supply, for improvement of fuel economy and drivability and the emission-reducing capability of a catalyst. The control system carries out auxiliary fuel supply for a cylinder during a predetermined time period within the expansion and exhaust strokes, to control the catalyst to a predetermined state for its emission-reducing capability. The control system calculates a whole demanded fuel amount to make oxygen concentration in exhaust gases equal to a predetermined value for controlling the catalyst to the state during auxiliary fuel supply, determines the amount of demanded combustion fuel to be supplied to obtain engine output, and determines the auxiliary fuel amount based on the difference between the whole demanded fuel amount and the demanded combustion fuel amount.

Control system for internal combustion engine

An EGR control system that is capable of controlling the amount of recirculation of high-temperature and low-temperature recirculated gases, with high accuracy, to thereby improve the control accuracy of in-cylinder temperature. An ECU of an ERG control system calculates a fresh intake air ratio, and sets a target value of the fresh intake air ratio. The ECU calculates a feedback correction coefficient for converging the fresh intake air ratio to the target value, with an I-PD control algorithm, and sets an external EGR ratio and an internal EGR ratio. The ECU controls the EGR amount whose ratio is the larger, according to the larger one of the two ratios and the feedback correction coefficient, and controls the EGR amount whose ratio is the smaller, according to the smaller of the ratios and the learned value thereof.

Growing community of inventors

Saitama-ken, Japan

Tetsuaki Nakano