摘要:
A vehicle having learning control includes a running condition detecting device for detecting a driving condition of the vehicle, a running characteristic control device for controlling a control gain to change a running characteristic of the vehicle and a gain control device for learning the running characteristic of the vehicle to change the control gain. The running characteristics of the vehicle can be controlled corresponding to various running conditions.
摘要:
A rear wheel steering apparatus for a vehicle, comprises a hydraulic cylinder for displacing a steering rod connected to left and right rear wheels axially, a centering spring for biasing the steering rod toward a neutral position, and a centering spring cancelling mechanism for preventing a biasing force of the centering spring from acting on the steering rod. A partition wall of the hydraulic cylinder defines an oil chamber in the cylinder and is formed as a cup shape having a central concave portion which constitutes a pressure chamber of the centering spring cancelling mechanism.
摘要:
A vehicle rear wheels steering apparatus is provided with a guide member having a guideway capable of freely tilting toward the axis of the rod member. Therefore, when the rod member rotates around the axis, an operating member provided on the outside of the rod member rotates around the rod member axis along the guideway to steer the rear wheels by an amount corresponding to an amount of rotation of the rod member and an amount of tilting of the guideway.
摘要:
A device for steering the rear wheels of a vehicle has a first motor controlled at least with respect to the steering angle of the steering wheel, a gear change mechanism for changing gear ratios, a second motor for controlling the gear ratio by driving the gear change mechanism, a steering mechanism for steering the rear wheels by transmitting a portion of the force equal to the product of the amount that the first motor is driven and the amount that the second motor is driven, a motor failure determination device for detecting motor failure when the amount that either of the first or second motors is driven is zero and the other of the motors is operated, and a control device for controlling both motors so that when motor failure is detected in one of the motors, the amount that the other motor is driven is brought to zero. The steering device may further have a sensor for detecting the steering angle of the rear wheels, and a sensor failure detecting device which monitors the steering angle detected by the sensor, and detects a failure of the sensor when the steering angle of the rear wheel changes although the amount that one of the motors is driven is zero. Also disclosed is a process for steering the rear wheels of a vehicle.
摘要:
A rear wheel turning system for a four-wheel steered vehicle includes a rear wheel turning mechanism for turning the rear wheels of the vehicle, a front wheel turning angle sensor which detects a turning angle of front wheels .theta..sub.F, a vehicle speed sensor which detects a vehicle speed V, a yaw rate detector which detects a yaw rate .PSI. of the vehicle, a yaw acceleration detector which detects a yaw acceleration .PSI. of the vehicle, and a control unit which causes the rear wheel turning mechanism to turn the rear wheels by a target rear wheel turning angle TG.theta..sub.R which is defined by formulaTG.theta..sub.R =-K.sub.1 .theta..sub.F +K.sub.2 .multidot.V.multidot..PSI.+K.sub.3 .multidot.V.multidot..PSI.wherein K.sub.1, K.sub.2 and K.sub.3 respectively represent positive coefficients. The coefficient K.sub.3 is increased with increase in the vehicle speed V over a predetermined range of vehicle speed where the coefficient K.sub.2 is constant.
摘要:
A vehicle characteristic change system including characteristic information forming device for forming a characteristic information with which characteristics of an object vehicle are changed, information entry device for entering the characteristic information into the object vehicle, characteristic change device for changing the characteristics of the object vehicle in accordance with the characteristic information formed by the characteristic information forming means. Characteristics of a vehicle can be readily changed to meet a driver's taste, driving condition, driving circumstances and the like with compact system and low cost.
摘要:
A vehicle characteristic change system includes a characteristic information forming device for forming characteristic information with which characteristics of an object vehicle are changed: information entry device is used for entering the characteristic information into the object vehicle, and a characteristic change device is used for changing the characteristics of the object vehicle in accordance with the characteristic information formed by the characteristic information forming device. Characteristics of a vehicle can be readily changed to meet preference of driver, a driver's taste, driving condition, driving circumstances and the like with a compact system and at low cost.
摘要:
A server for changing control gains of a vehicle is disclosed. The server includes a first receiver for receiving environment data obtained by vehicles of a plurality of users running in specific areas, and a second receiver for receiving learned data obtained by a plurality of users operating vehicles, and a storage device for accumulating the environment data and the learned data. The server further includes a transmitter for fetching environment data and learned data necessary to produce control gains from among the accumulated environment data and the learned data and transmitting the fetched environment data and learned data to a user requesting the environment data and the learned data. In a vehicle of the user, the control gains are newly produced and previously produced control gains are changed to the newly produced ones.
摘要:
A vehicle control system includes an active suspension mechanism for providing a rolling property of a vehicle in a cornering operation of the vehicle and a suspension control device for controlling the vehicle in accordance with the rolling property provided by the active suspension mechanism and changing from one rolling property to another. A rear wheel steering mechanism steers a rear wheel in connection with steering of a front wheel, and a steering control device controls the steering of the rear wheel in accordance with a predetermined steering property and changes the steering property for the rear wheel. One of the steering property and the rolling property is changed in synchronism with a change in the other of the steering property and the rolling property. When a reverse phase property is provided for the rear wheel as a steering property and a reverse rolling property is provided for the active suspension system, the visibility of the cornering direction and the operability are improved to accomplish an active operation property. Alternatively when a same phase property is provided for the rear wheel as a steering property, the running stability can be improved.
摘要:
A fluid type of vibration damper apparatus containing fluid in a rigid fluid container divided by a partition formed with an orifice into two fluid chambers in communication with each other through the orifice, one of the fluid chambers being closed up air-tightly by an elastic top wall to which a subject body of vibration is attached and containing a predetermined quantity of gas so as to be in direct contact with the fluid therein.