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AssigneeMitsubishi Jidosha Kogyo Kabushiki Kaisha
InventorsNobuo Momose, Masayoshi Ito, Hiroaki Yoshida, Masanori Tani, Yoshiaki Sano, Masahito Taira
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An apparatus for estimating a road traffic condition and for controlling a vehicle running characteristic includes a controller having a fuzzy inference function and a neural network function. The controller carries out frequency analysis on vehicle driving parameters such as vehicle speed, steering angle, accelerator opening degree, and longitudinal acceleration and lateral acceleration of a vehicle, to thereby determine a mean value and variance of each parameter. It implements fuzzy inference based on a traveling time ratio, an average speed, and an average lateral acceleration, which are obtained from vehicle speed and/or steering angle, to thereby calculate road traffic condition parameters, including a city area degree, a jammed road degree, and a mountainous road degree. According to the neural network function, the controller further determines an output parameter, indicative of the vehicle maneuvering state, by subjecting the mean value and variance of the vehicle driving parameters and the weighted total sum of the road traffic condition parameters to nonlinear conversion. Then, it variably controls the operating characteristic of a vehicle-mounted apparatus such as a rear-wheel steering controlling unit in accordance with the output parameter, thereby variably controlling the vehicle running characteristic.
A road traffic condition estimating method for estimating a traffic condition of a road on which a vehicle is traveling, comprising the steps of:
A method for controlling a characteristic of a vehicle in which a characteristic of a vehicle is variably controlled by variably controlling an operating characteristic of an apparatus mounted on the vehicle, comprising the steps of:
A road traffic condition estimating apparatus for estimating a traffic condition of a road on which a vehicle is traveling, comprising:
An apparatus for controlling a characteristic of a vehicle in which a characteristic of a vehicle is variably controlled by variably controlling an operating characteristic of an apparatus mounted on the vehicle, comprising:
Dependencies are inferred from the claim text.