Toyota Jidosha Kabushiki Kaisha

Masahiro Murata

Satoshi Suzuki

Toshio Onuma

Toshiyuki Kobayashi

Mitsuhiko Morita

Koichi Tomida

Yasuhiko Mishio

Tomomi Nakayama

Tomoko Tashiro

A device for controlling damping coefficients of shock absorbers (,FL,,FR,,RL,,RR) of a four wheeled vehicle constructs a phantom damping system composed of a phantom side shock absorber (,F,,R) disposed vertically at a lateral inside of a turn running of the vehicle to have a lower end movable along a ground surface together with the vehicle and an upper end vertically movable relative to the lower end with a first phantom damping coefficient (Cg, Cgf, Cgr) therebetween, and a phantom angular shock absorber (,F,,R) arranged to act between the upper end of the phantom side shock absorber and the vehicle body with a second phantom damping coefficient (Ca, Caf, Car) therebetween, whereby, when the damping coefficients of the shock absorbers are controlled to substantially equalize the phantom damping system with the actual damping system of the actual shock absorbers with respect to damping vertical and rolling movements of the vehicle body, the mass center of the vehicle body is lowered according to a rolling thereof during a turn running of the vehicle, as the vehicle body rolls around the upper end of the phantom side shock absorber located laterally inside of the turn running.

Device for controlling suspension shock absorbers of vehicles based upon phantom substitute therefor

A device for controlling damping coefficients of shock absorbers (,FL,,FR,,RL,,RR) of a four wheeled vehicle constructs a phantom damping system composed of a phantom side shock absorber (,) disposed vertically at a lateral inside of a turn running of the vehicle and longitudinally shifted from a center of gravity of the vehicle body in a direction of a longitudinal acceleration or deceleration of the vehicle to have a lower end movable along a ground surface together with the vehicle and an upper end vertically movable relative to the lower end with a first phantom damping coefficient (Cg) therebetween, and a phantom angular shock absorber (,) arranged to act between the upper end of the phantom side shock absorber and the vehicle body with a second phantom damping coefficient (Ca) therebetween, whereby, when the damping coefficients of the shock absorbers are controlled to substantially equalize the phantom damping system with the actual damping system of the actual shock absorbers with respect to damping vertical, rolling and pitching movements of the vehicle body, the mass center of the vehicle body is lowered according to a rolling during a turn running of the vehicle and/or a pitching of the vehicle body due to an acceleration or a deceleration of the vehicle, as the vehicle body rolls and/or pitches around the upper end of the phantom side shock absorber.

Device for controlling suspension shock absorbers of vehicles with skewed phantom substitute

A suspension control device for a vehicle equipped with suspension dampers variable of damping coefficient, including: a means for storing a group of schedules each having a plurality of information units for controlling the variation of the damping coefficient of the damper; a means for generating a new schedule by hybridizing more than one of the schedules selected from the group according to a predetermined genetic algorithm including mutation based upon a fictionalization that the schedules are living individuals each having the plurality of information units as a set of genes; a means for evaluating each of the schedules under current operation environment of the vehicle to determine the ranking of the schedules in the group in improving a predetermined performance of the suspension; a means for adopting a highest ranked schedule for controlling the damping coefficient of the damper; a means for deleting a lowest ranked schedule to keep the number of the schedules forming the group substantially constant; and a means for generating a control signal for controlling the damper based upon the highest ranked schedule.

Suspension control device of vehicle according to genetic algorithm

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Nisshin, Japan

Masahiro Murata