摘要:
A device for detecting a bad or bumpy road from a moving vehicle includes a plurality of wheel speed detectors for detecting the corresponding wheel speeds of a plurality of different wheels, an arithmetic circuit for calculating a difference between values detected in the individual wheel speed detectors, a filter, receiving outputs from the arithmetic circuit, for processing only components in a predetermined frequency band, and a determination circuit for determining if a vehicle is travelling on a bad road based on outputs from the filter. The device easily detects a bad road from a moving vehicle on the basis of outputs from said wheel speed detectors, without being affected by instantaneous variation in the wheel speeds.
摘要:
A device for detecting a bad or bumpy road from a moving vehicle includes a plurality of wheel speed detectors for detecting the corresponding wheel speeds of a plurality of different wheels, an arithmetic circuit for calculating a difference between values detected in the individual wheel speed detectors, a filter, receiving outputs from the arithmetic circuit, for processing only components in a predetermined frequency band, and a determination circuit for determining if a vehicle is travelling on a bad road based on outputs from the filter. The device easily detects a bad road from a moving vehicle on the basis of outputs from said wheel speed detectors, without being affected by instantaneous variations in the wheel speeds.
摘要:
A control input for operating an actual vehicle actuator and a control input for operating a vehicle model are determined by an FB distribution law based on a difference between a reference state amount determined by a vehicle model and an actual state amount of an actual vehicle such that the state amount error is approximated to zero, and then an actuator device of the actual vehicle and the model vehicle are operated based on the control inputs. The FB distribution law determines a control input for operating the model such that a state amount error is approximated to zero while restraining a predetermined restriction object amount from deviating from a permissible range. A vehicle control device capable of enhancing robustness against disturbance factors or their changes while performing operation control of actuators that is as suited to behaviors of an actual vehicle as possible is provided.
摘要:
A hydroplaning detecting system comprises wheel rotational speed detecting apparatus for detecting a wheel rotational speed of a wheel of a vehicle, reference pattern storage apparatus for previously storing a reference pattern of wheel rotational speed which varies over a period of time and is characteristic of hydroplaning generation, actual variation pattern extracting apparatus for extracting a actual variation in the wheel rotational speed over a period of time, and judgment apparatus for judging the matching between the reference pattern and the actual variation pattern. Thus, this hydroplaning detecting system is capable of accurately detecting the generation of hydroplaning.
摘要:
In a control system wherein slippage of a vehicle drive wheel is detected and when the slip is excessively large, an engine output or drive wheel torque is reduced, there are provided means for calculating the grip force of the drive wheel and further means for changing the reduction amount of engine output or drive wheel torque, or the reduction speed, or the reduction characteristic dependent on a signal from the grip force calculating means. This enables a sporty travel of a vehicle.
摘要:
A yaw motion control device for a vehicle includes a steering angle sensor for detecting the steering angle of a steering wheel of the vehicle and a steering angle memory means operatively connected to the steering angle sensor for storing at least a previous value of the steering angle. A reference yaw rate generator generates a reference yaw rate in response to an input from the steering angle memory, and a yaw rate detector detects the yaw rate of the vehicle. Further, a yaw motion corrector controls the yaw motion of the vehicle in response to the outputs from the reference yaw rate generator means and the yaw rate detector. The yaw motion control device set forth above can also be employed with a vehicle speed detector for detecting the speed of the vehicle, and for outputting the vehicle speed to said reference yaw rate generator to provide greater accuracy in controlling the yaw motion of the vehicle.
摘要:
A control system for controlling the slip of a driving wheel of a vehicle senses the speed of at least a driving wheel and the vehicle speed. A slip rate calculator and a differentiator calculate the slip rate and the differential of the slip rate, respectively. An excessive slip rate circuit, a prediction control circuit, and an excessive differential slip rate circuit receive inputs from the calculator and differentiator and operate individually or in concert to detect a slip condition. An output circuit is connected to the excessive slip rate, prediction control, and excessive differential slip rate circuits to output a driving wheel slip control signal when at least one of the above circuits detects a slip condition.
摘要:
A traction control system controls the slip of a driving wheel of a vehicle having at least two driving wheels. The traction control system includes a driving wheel speed sensor for sensing the speed of the driving wheels and for generating a driving wheel speed signal as a function thereof, a vehicle speed sensor for sensing the speed of the vehicle and for generating a vehicle speed signal as a function thereof, and a first selecting circuit, included within the driving wheel speed sensor and operatively connected to said vehicle speed sensor, for generating the driving wheel speed signal in response to the vehicle speed signal. The system also provides for a controller responsive to the driving wheel speed signal from the first selecting circuit for controlling the slip of the driving wheel.
摘要:
A control input for operating an actual vehicle actuator and a control input for operating a vehicle model are determined by an FB distribution law based on a difference between a reference state amount determined by a vehicle model and an actual state amount of an actual vehicle such that the state amount error is approximated to zero, and then an actuator device of the actual vehicle and the model vehicle are operated based on the control inputs. The FB distribution law determines a control input for operating the model such that a state amount error is approximated to zero while restraining a predetermined restriction object amount from deviating from a permissible range. A vehicle control device capable of enhancing robustness against disturbance factors or their changes while performing operation control of actuators that is as suited to behaviors of an actual vehicle as possible is provided.