Abstract: A four wheel driving vehicle includes a center differential gear wherein a differential operation limit is achieved by a wet hydraulic multiple disk clutch and is improved in running performance, turning performance, acceleration performance and so forth. An engaging force of the clutch and hence a hydraulic pressure to be supplied to the clutch are controlled in accordance with a steering angle, a vehicle speed, an advancing direction acceleration, an engine output torque, a differential operation speed difference between front and rear wheels and so forth to obtain a desired torque distribution suitable for a current running condition of the vehicle.

Abstract: A controller system having a half-duplex serial line as a bus for transferring commands, status and data between all controllers in a planting and spraying system. A bus master connected to the serial line synchronizes each controller to the network while a base console coordinates the operation of each planting and spraying system. Separate system controllers operate in conjunction with each system accessory module to control the components of each planting and spraying system. Operation of a spray control module is controlled by the sprayer control console, operating in conjunction with a base console. A planter monitor module provides control over a plurality of components in a seed-planting system. A base console with a primary user interface and a planter controller console with a planter user interface are connected to the planter monitor module over a communications medium.

Abstract: Whether the load on the automobile is normal or heavy or whether the automobile is in a normal, oversteering or understeering condition is detected by a rising-up performance of the yaw rate in the initial transient state of steering from a comparison of an actual yaw rate detected by a sensor and a standard yaw rate calculated from vehicle speed and steering angle, and the speed stage shifting of the automatic transmission is modified according to the result of the comparison so as to compensate for a change of load or a deviation of steering performance from a normal condition.

Abstract: A vehicle control system includes a sensor for detecting an operating condition of a vehicle, and a control device. When the output of the sensor is normal, the control device controls an actuator in accordance with the output of the sensor. When the output of the sensor exceeds a limit value and therefore becomes abnormal, the control device controls the actuator using backup data. As the backup data, auxiliary backup data is first used, and thereafter predetermined main backup data is used. The auxiliary backup data gradually varies from a value of the output of said sensor, obtained immediately before the output of the sensor exceeds the limit value, toward the main backup data, so that the auxiliary back data becomes closer to the main backup data.

Abstract: A control system of an automatic transmission for determining and setting a gear stage on the basis of at least two of the parameters including a vehicle speed and a throttle opening. The control system comprises: a first detector for detecting a first parameter; a second detector for detecting a second parameter; a gear stage memory for determining and storing speed stage areas for holding the gear stages individually in terms of the first and second parameter and any two speed stage areas in a partially overlaid manner; a shift decider for determining a shift to be executed, on the basis of the first parameter outputted from the first detector, the second parameter outputted from the second detector, and the stored content of the gear stage memory; and a gear stage determiner for determining a gear stage to be set, if there are a plurality of gear stages determined by the first parameter and second parameter detected, at any of the gear stages.

Abstract: A method is provided for computing a stabilized vehicle speed value from a detected vehicle speed pulse signal and a detected engine speed signal, the vehicle speed value being for use by a vehicle speed control system. The method comprises several continuous cyclic steps commncing with generating a measured vehicle speed value from the detected vehicle speed pulse signal and generating a measured engine speed value from the detected engine speed signal. A current gear ratio is calculated from the measured vehicle speed value and the measured engine speed value. This current gear ratio is then passed through a single pole digital filter to filter changes in the gear ratio between consecutive cycles as a function of the current gear ratio and the gear ratio computed in the last preceding cycle of the computation. A current usable gear ratio is generated which is changed from the most recently generated usable gear ratio only if changes in the gear ratio exceed predetermined limit values.